Septal Considerations in Revision Rhinoplasty
Transcription
Septal Considerations in Revision Rhinoplasty
ARTICLE IN PRESS 1 FACIAL PLASTIC SURGERY CLINICS OF NORTH AMERICA Facial Plast Surg Clin N Am - (2006) -–- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Septal Considerations in Revision Rhinoplasty Armando Boccieri, - MD*, Carlo Macro, Pathologic anatomy of the nasal septum Absence of the nasal septum Persistent septal deviation Supratip deformity owing to the dorsal septum Assessment of the condition of the nasal septum is an indispensable preliminary stage in the surgical treatment of revision rhinoplasty. The septal structure performs a key function in supporting the nasal pyramid, and its straightness constitutes an essential prerequisite for the achievement of satisfactory esthetic results. Irvin Goldman in the 1960s coined the renowned dictum, ‘‘As the septum goes, so goes the nose.’’ This statement still retains validity and relevance in light of the developments in nasal surgery over the last few years. Examination of the outcome of previous rhinoplasties often reveals overaggressive resection of this anatomic structure and collapse of the nasal dorsum or, on the contrary, insufficient correction of septal deviation. The result of such incorrect treatment is a varying degree of esthetic and functional impairment that can prove difficult to repair. The most recent reconstructive techniques adopted in surgical revision use grafts to replace the missing structures, and the nasal septum constitutes a primary source of material to this end. This function as donor site depends on the presence of the septum after the initial operation and can be performed also in the patient who has incomplete correction of the nasal septum. This article analyzes the following three fundamental aspects of the nasal septum in revision - MD Use of septal cartilage for grafting Discussion Summary References rhinoplasty: (1) deficit of the septal structure to varying degrees, (2) persistent deviation of the nasal septum, and (3) supratip deformity caused by inappropriate resection of the dorsal septum. Attention is focused separately on the residual nasal septum as a source of material in revision operations for grafts to reconstruct impaired anatomic structures. The article also describes and discusses some recent reconstructive techniques used to address problems regarding the nasal septum during revision rhinoplasty. Pathologic anatomy of the nasal septum The complete resolution of functional and esthetic problems during revision surgery can only be ensured by a thorough understanding of certain elements of anatomy and physiopathology. The anatomic constituents of the nasal septum are the nasal spine of the frontal bone, the perpendicular plate of the ethmoid, a portion of the medial segments of the nasal bones, the vomer and crest of the sphenoid, the nasal crest of the maxilla, the premaxilla and nasal spine, the quadrangular cartilage, the upper lateral cartilage, the membranous septum, and the columella [1]. Department of Maxillo-Facial Surgery, S. Camillo Hospital, Circonvallazione Gianicolense, 87-00152, Rome, Italy * Corresponding author. Viale U. Tupini 133, Rome 00144, Italy. E-mail address: armando.boccieri@libero.it (A. Boccieri). 1064-7406/06/$ – see front matter ª 2006 Elsevier Inc. All rights reserved. facialplastic.theclinics.com fsc0256 15 September 2006 8:11 pm doi:10.1016/j.fsc.2006.06.005 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 2 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 Boccieri & Macro ARTICLE IN PRESS The cartilaginous portion of the nasal septum situated in front of an imaginary line running from the osteocartilaginous joint of the rhinion to the anterior nasal spine actually provides nasal support. Reconstruction of an L-shaped supporting septal structure, regardless of the procedure used, must ensure complete restoration of this important anterior anatomic region. The predominantly osseous portion of the nasal septum situated behind the same imaginary line is far less involved in postsurgical esthetic problems. Nevertheless, marked deviations of the ethmoid that are not surgically treated can sometimes prevent the correct positioning of nasal bones with respect to the septum after osteotomies and can cause functional respiratory disorders. In such cases, revision will obviously involve the submucous resection of the deviated area with no need for structural repair. The anterior portion of the cartilaginous septum performs its supporting function on the middle nasal vault in conjunction with the upper lateral cartilages and on the nasal tip through the attachments of the medial crural footplates to the caudal border of the quadrangular cartilage and the domes. Absence or severe deviation of the caudal septum can cause loss of projection and ptosis of the tip as well as columellar retraction [2]. The angle of the internal nasal valve formed by the nasal septum and the upper lateral cartilages, which should physiologically have values between 10 and 15 degrees, is impaired by the absence and by the severe deviation of the septum. In the first case, the structure collapses with extreme widening of the angle, giving the anatomopathologic appearance referred to as ‘‘ballooning.’’ In the second case, there is a narrowing of the angle on the concave side of the deviation with stenosis of the internal nasal valve [3]. In both situations, the valvular impairments cause considerable difficulty in nasal respiration. With respect to the relations between the cartilaginous septum and the upper lateral cartilages, the two structures are practically continuous, and recent anatomic studies have shown that the nasal septum has a wide Y-shape in its dorsal most portion [4]. In a physiologic condition, this widening of the dorsal septum functions with the two upper lateral cartilages as two spreader grafts [5] and ensures normal respiratory flow at the level of the internal nasal valve [6]. Various factors are involved in the etiopathogenesis of persistent deviations of the nasal septum. Apart from cases of inadequate surgical treatment, failure is often caused by the presence of deforming forces extrinsic and intrinsic to the cartilaginous septum that tend over time to cause the recurrence of deviation [7]. The intrinsic forces are those inherent in the structure of the cartilaginous septum that retain the ‘‘memory’’ of their deviation and tend to return to the incorrect original position even after reshaping. From an ultrastructural viewpoint, this phenomenon appears to be due to interlocked stresses inside the cartilage, which are governed, in turn, by the protein-polysaccharide complexes associated with the collagenic fibers [8,9]. The extrinsic deforming forces are exerted on the cartilaginous septum by the surrounding structures connected to it, such as the nasal bones, upper lateral cartilages, vomer, ethmoid, and maxillary crest. If still deviated and not perfectly separated from the nasal septum during the operation, these anatomic structures can cause the deviation of the cartilaginous septum to reappear over time. The deforming forces external to the cartilaginous septum also include the postoperative contraction of cicatricial fibrosis, which can lead to relapse and distortion. Absence of the nasal septum Unfortunately, the idea that an L-shaped structure at least 1.5 cm in width must always be preserved at the end of every septorhinoplasty operation is still not known to and accepted by all surgeons. The function of this pillar is to support the nasal pyramid and maintain a physiologic relationship between the nasal septum and the upper lateral cartilages at the level of the internal nasal valve. Even in cases in which the residual L-shaped structure is deviated, it must not be removed but rather reshaped or replaced with no alteration of functions. It is probably the difficulty encountered in correcting deviations in this site that prompts some surgeons to undertake its erroneous partial or total removal. In these circumstances, the mucoperichondrial covering can remain intact even though it no longer contains the cartilaginous structure normally present. This point is important for surgical purposes as a criterion to differentiate the type of treatment to be employed. When the mucoperichondrium is also lacking and there is perforation of the nasal septum, it is necessary to employ different surgical techniques serving also to reconstruct the covering. In reconstruction of the cartilaginous septum, the authors stress the need for preliminary assessment of the impairment to the structure as a prerequisite in deciding which technique to use. When the deficit is confined to the caudal most portion of the nasal septum, it is possible to consider first the technique of caudal septal extension grafting [10], which consists of excising a straight inferoposterior portion of the cartilaginous septum (if present) and using it to replace the anterior pillar of the L-shaped fsc0256 15 September 2006 8:11 pm 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 ARTICLE IN PRESS Septal Considerations in Revision Rhinoplasty structure (Fig. 1). This graft is posteriorly sutured to the caudal border of the surviving nasal septum with two 4.0 polydioxanone (PDS) mattress sutures and secured anteriorly between the medial crura with two buried 5.0 Prolene sutures and a single temporary 4.0 Monocryl mattress suture. When a sufficiently large cartilaginous structure is not available posteriorly, any cartilaginous hump present can be excised and reshaped to reconstruct the absent caudal septum [11]. The hump must obviously be pared down and flattened to obtain a suitable structure for the type of graft required. When neither of these sources for reconstruction of the nasal septum is available and the structural deficit of the septum is subtotal, the auricular concha can be used for the graft [12]. It is essential when harvesting conchal material to preserve the helix root and the antihelix fold so as to leave no trace in the auricular pavilion. If the approach is performed from the posterior surface of the ear, it is advisable to insert four or five needles in the anterior surface of the ear so that the incisions can be made posteriorly without damaging these important anatomic folds (Fig. 2A,B). The concha can be reshaped and can provide a straight sturdy structure similar to that of the nasal septum to be replaced. To straighten the concha, it is first necessary to perform a series of incisions in the concave side followed by two figure-eight sutures of 5.0 nylon. To reinforce the structure, two spreader grafts taken from the outer and inferior border of the concha are then sutured with 5.0 nylon to the two sides of the concha with their concave sides to the inside (Fig. 3). The region of the concha where the two spreader grafts are attached will correspond to the dorsal pillar of the ‘‘neo-septum.’’ When the concha is particularly curved, it is sometimes possible to use a third graft taken from the central region of the concha and secured to what will then be the caudal pillar of the neo-septum. The end result is a straight, sturdy, L-shaped supporting structure, print & web 4C=FPO 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 Fig. 1. Caudal extension graft technique. A segment of straight septal cartilage is harvested from the posteroinferior septum and then sutured to the existing caudal septum. which will be inserted between the two flaps of the mucoperichondrium where the septal structure is missing. Regardless of the type of graft selected, it is essential to separate the two mucoperichondrial flaps precisely so as to create a pocket (Fig. 4A). It is also vital in such cases to use an open approach, and the authors systematically employ a transcrural and transdomal path of access. The detachment must be precise and avoid any laceration of the mucous membrane. Of crucial importance in this phase are abundant infiltration with vasoconstrictor, strong outward traction of the two flaps, and the use of a sharpened scalpel from front to back and from top to bottom. Insertion of the surgeon’s index finger into the right nasal cavity and frequent interior checking of the nasal cavities can prove useful to proceed confidently during the detachment and to ensure immediate awareness of any laceration of the mucous membrane. After insertion between the two flaps of mucous membrane, the graft must be secured with permanent sutures to the posterior septal residues (if present), the upper lateral cartilages, and the medial crura by means of a tongue-in-groove technique (Fig. 4B) [13]. This technique makes it possible to obtain a correct nasolabial angle and adequate tip projection (Fig. 5). Persistent septal deviation In the results of septorhinoplasty, a basic distinction should be drawn between deviations of the nasal septum that affect the dorsal or caudal pillar of the structure and those affecting the internal basal and medioseptal region. An evident esthetic defect arises in the first two cases, whereas the third involves only a functional respiratory defect of varying severity. The presence of these problems stems essentially from two causes: (1) incomplete treatment on the part of the surgeon or (2) the use of inappropriate surgical techniques to neutralize the tendency of the cartilaginous deviation to return to its original incorrect position over time. Hump excision can sometimes accentuate deviation of the nasal dorsum because the nasal septum, previously concealed beneath the hump, is clearly exposed and can present a more marked deviation than the removed upper portion. The correction of septal deviation constitutes the first stage during revision because other associated corrections could be affected by the persistence of the defect if performed first. For example, correction of the nasal tip or a graft on the dorsum could, if performed in an earlier phase, leave major asymmetries at the end of the operation. In patients in whom internal deviations of the nasal septum do not involve the L-shaped structure, fsc0256 15 September 2006 8:11 pm 3 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 Boccieri & Macro ARTICLE IN PRESS print & web 4C=FPO 4 Fig. 2. (A) Cartilage incision along the outline marked by needles. (B) Resection of the cartilage graft leaving the helix root and the antihelix fold intact. the preferred treatment involves vertical shaves and staggered incisions or the resection of particularly crooked portions [14–16]. Septal or maxillary spurs on the floor of the nasal cavities require submucous excision above all when they are in the vicinity of the internal nasal valve, in which position they are functionally significant. There is no good reason to insist on the removal of very posterior spurs, given their negligible functional effect on respiratory airflow. Posterior deviations of the perpendicular plate of the ethmoid can be repositioned easily on the median line by means of fracture with a Goldman displacer. The anterior nasal spine, if left crooked in the previous operation, can also be fractured and secured to the periosteum in the middle with slow absorption sutures. In the patient who has deviation of the caudal septum with projection of the septal border into Fig. 3. (Above left) Incision of curved conchal cartilage. (Above right) Figure-eight suture. (Below left) Harvesting of spreader grafts. (Below right) Placement of spreader grafts. (From Boccieri A. Subtotal reconstruction of the nasal septum using a conchal reshaped graft. Ann Plast Surg 2004;119; with permission). one of the nasal cavities, excellent results can be obtained through use of the ‘‘swinging door’’ technique [17]. This technique involves excision of a thin vertical strip of cartilage at the point of greatest angle of the nasal septum, inferior detachment from the maxillary crest, and rotation toward the center of the freed caudal septum like a door swinging on its hinges. The base of the caudal septum is then secured with slow absorption stitches to the columella and the anterior nasal spine to ensure that the correct position is maintained over time. Although a closed approach with hemitransfixion incision can prove sufficient for all of the techniques outlined previously, an open approach is indicated if the persistence of the deviation affects the dorsal portion of the nasal septum. This approach is justified by the need for a more complete and three-dimensional view of the deviation and by the greater ease of suturing grafts in the more posterior regions, which are otherwise inaccessible [18]. The technique used in revision rhinoplasty to correct deviation of the dorsal septum must be chosen in relation to the severity of the defect and the type of graft available. For slight C-shaped deformities of the middle third, it is possible to opt for selective tangential shaving of the convex side of the dorsal border of the septum with the insertion of a unilateral planoconvex spreader graft between the concave side of the dorsal septum and the upper lateral cartilage [2]. The use of one or two spreader grafts is indicated for moderately severe residual deformities of the dorsal septum [19–21]. In patients in whom the cartilaginous septum is still present after the previous operation, a unilateral spreader graft harvested from the septum and sutured to the concave side of the deviation can prove sufficient (Fig. 6A,B). Before the graft is secured, several vertical incisions are generally made on the concave side to open the cartilaginous spring. When the residual cartilaginous septum is not sufficient to provide material, two spreader grafts can be harvested from the auricular concha and secured to either side of the septum with their concave sides on the inside. fsc0256 15 September 2006 8:11 pm 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 print & web 4 ARTICLE IN PRESS Septal Considerations in Revision Rhinoplasty Fig. 4. (A) Separation of the two mucoperichondrial flaps. A suitable pocket has been obtained for the graft. (B) Suturing of the conchal graft in place of the missing septum. print & web 4C/FPO 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 The crossbar graft technique is indicated for severe persistent deviations of the dorsal septum [22]. This technique combines septoplasty by means of staggered incisions with the insertion of a spreader graft in the dorsal septum. The graft must be positioned on the concave side of the deviation or, in the patient who has linear deviation of the dorsal septum, on the side where there is a gap between the septum and the upper lateral cartilages. The incisions are made on the dorsal and caudal pillars of the L-shaped structure, normally, three on each side, two on the outside, and one on the inside in the areas of greatest deviation. At the end, the crossbar graft is embedded between the two incisions in the dorsal and caudal pillars and sutured front and back with two mattress stitches of 5.0 Vicryl (Fig. 7). In revision cases, the crossbar can also be harvested from the cartilaginous nasal septum, if this was not radically excised during the previous operation, provided that the L-shaped structure is left intact. If harvesting the crossbar from the cartilaginous septum would impair the integrity of the L-shaped structure, a strip of the perpendicular plate of the ethmoid can be used for the same end (Fig. 8). In patients in whom the deviation of the dorsal septum is accompanied by an inverted V deformity of the nasal pyramid owing to excessive excision of the upper lateral cartilages, it is advisable to use two spreader grafts taken from the auricular concha, which are effective in the correction of both deformations. The two spreader grafts are secured to the dorsal septum with their natural concavity turned to the inside, and their thickness is adjusted to the concavity and convexity of the dorsal septum to make it straight (Fig. 9). Supratip deformity owing to the dorsal septum Supratip deformity is frequently involved in revision rhinoplasty. It takes the form of convexity in the region of Converse’s weak triangle, which causes the lower third of the nose to assume the particular ‘‘polly beak’’ shape. This sequela can arise after rhinoplasties performed by inexperienced surgeons and unexpectedly after rhinoplasties performed by expert surgeons, in which case imponderables connected with the characteristics of the patient and aspects of scar-tissue formation are probably involved [23]. Insufficient removal of the dorsal cartilaginous septum and overresection of the nasal dorsum with the formation of scar tissue are securely identified as two etiopathogenetic causes connected with the nasal septum in the genesis of polly beak deformity [24]. In the second case, the deformity is caused by an excess of scar tissue produced to eliminate the void left in the supratip region by overzealous resection of the caudal nasal dorsum [25]. In addition to these causes, two other elements are often present that work to accentuate the deformity, namely, underprojection of the tip and insufficient resection of the cephalic portion of the lower lateral cartilages. Simple palpation of the supratip can reveal the consistency of the region and supply diagnostic indications of the type of polly beak deformity presented by the patient before surgery. When the cause is an overprojected caudal dorsum, the deformity can easily be corrected by removal of the surplus cartilage (Fig. 10). If the supratip fullness is instead caused by swelling and scar tissue and is diagnosed within 3 months after the operation, the fsc0256 15 September 2006 8:11 pm 5 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 Boccieri & Macro ARTICLE IN PRESS print & web 4C/FPO 6 Fig. 5. Case 1. Man aged 19 years subjected to two previous septoplasties. Loss of the supporting septal structure caused droopiness of the nasal tip, an acute nasolabial angle, and respiratory difficulty. Subtotal reconstruction of the nasal septum was performed using a reshaped conchal graft. (A) Finger pressure revealing the absence of the cartilaginous septum. (B,D,F,H) Preoperative views. (C,E,G,I) Postoperative views 1 year after surgery. fsc0256 15 September 2006 8:11 pm 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 print & web 4 ARTICLE IN PRESS Septal Considerations in Revision Rhinoplasty Fig. 5. (continued). print & web 4C/FPO Fig 5, continued. Basal view prior to (H) and post (I) revision surgery. area can be subjected to injection with triamcinolone and compression taping [24]. The triamcinolone injection must be performed carefully to the correct subdermal depth, avoiding injection into the dermis, and can be repeated up to three times at intervals of 3 to 4 weeks. If pharmacologic treatment fails to provide the desired results, revision surgery must be performed after an interval of at least 1 year. This period of time is necessary to ensure that the cicatricial contraction is completely finished and the condition to be corrected is definitive. The surgical treatment in such cases involves complete removal of scar tissue from the area of the supratip and exposure of the dorsal cartilaginous septum beneath. The height of the latter is often insufficient, and a graft of septal or auricular cartilage can be used to fill the void in the area of the supratip. Regardless of whether the deformity of the dorsal septum is due to the excess or absence of material, it is important to ascertain whether there is any accompanying decrease in tip projection, in which case cartilaginous grafts of the shield [26] or Peck type [27] are indicated. In such cases, reshaping of the tip must precede reshaping of the dorsum because the latter depends on the projection of the tip. It is important to create a break point at the level of the supratip at the end of the revision. A slight unevenness between the domes and the plane of the dorsal septum ensures a more than satisfactory esthetic result. It is advisable to leave a gap between the two cartilaginous structures of approximately 6 to 7 mm, or even as much as 10 mm in the patient who has particularly thick skin [24,28]. Careful postoperative observation of the patient, prolonged taping of the supratip, and injection with triamcinolone if required are part of the correct treatment to avoid this deformity in surgical revision. Use of septal cartilage for grafting When present, the nasal septum constitutes the primary source of material for structural grafts in revision rhinoplasties. The quality of the cartilage is optimal for durability and definition beneath the layer of soft tissues and the skin. print & web 4C=FPO 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 Fig. 6. (A) Persistent septal deviation with concave side on the left. (B) Placement of unilateral spreader graft on the concave side. fsc0256 15 September 2006 8:11 pm 7 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 Boccieri & Macro ARTICLE IN PRESS print & web 4C=FPO 8 Fig. 8. Septal crossbar graft harvested from ethmoidal bone is sutured on the concave side of the septal deviation. Fig. 7. (Above left) Preoperative curvature of the septum. (Above right) Pattern of staggered incisions. (Below left) Septal crossbar graft fitted between two septal vertical intracartilaginous incisions (closed approach). (Below right) Additional posterior suture (open approach). (From Boccieri A, Pascali M. Septal crossbar graft for the correction of the crooked nose. Plast Reconstr Surg 2003;111:631; with permission). Harvesting can be performed by means of a hemitransfixion incision or through a transcrural open approach if planned for other corrections. After detaching the mucoperichondrium on one side, a vertical cartilaginous incision is performed posterior and parallel to the caudal border of the septum at a distance of approximately 1 to 1.5 cm. The incision stops approximately 1 to 1.5 cm from the dorsal edge of the septum. This incision serves to deglove the contralateral mucoperichondrium as well as the perpendicular plate of the ethmoid on both sides. The cartilaginous septum is then detached inferiorly from the maxillary crest, and an incision is made in it superiorly parallel to the dorsal edge so as to leave the graft connected only posteriorly to the perpendicular plate of the ethmoid. At this point, it is preferable, if necessary, to fracture the perpendicular plate of the ethmoid inferiorly with a Goldman displacer to extract the graft of cartilaginous septum together with a small portion of ethmoidal bone (Fig. 11). The cartilaginous septum is harvested together with this portion of ethmoid because of the difficulty of separating them inside the nasal cavities without risking a fracture of the cartilage anterior to their joint, reducing the length of the graft [29]. The excision should be performed with as little trauma as possible, because even small lacerations or fractures of the septum can impair the shape of the grafts to be obtained and their strength as structural supports. The newly harvested piece of cartilage is vaguely rectangular in shape and can be used to carve all of the grafts required for the revision. If only one or two grafts are required, the excision can be confined to a limited portion of the cartilaginous septum to avoid uselessly weakening the structural support of the nasal pyramid. In the patient who has undergone previous submucous resection of the septum, the excision will necessarily be limited to a small quantity of cartilage to avoid any damage to the residual supporting L-shaped structure. Numerous types of grafts can be obtained from the nasal septum for surgical revision, including grafts serving to reconstruct all three thirds of the nasal pyramid. Correction of a saddle nose deformity is frequently needed in connection with the upper and middle thirds of the nose. In these patients, the graft must be cut in an oval shape and carefully tapered to the sides with the edges beveled so as to avoid any perception of ‘‘steps’’ beneath the skin. A useful procedure for curving the graft is to perform an incision part of the way through the thickness along the midline together with another two lateral and parallel incisions, if necessary. By exerting pressure with the fingers along the lines of incision, it is possible to cause a greenstick fracture and to obtain an inverted V-frame graft or U-frame graft adapting well to the nasal dorsum [29]. A narrow middle third of the nose with collapse of the middle nasal vault and an inverted V deformity can be the result of particularly aggressive and excessively reductive rhinoplasty. Revision rhinoplasty requires the use of spreader grafts in such cases [5]. These rectangular grafts are inserted and secured between the dorsal septum and the upper lateral cartilages and are useful in functional and esthetic terms, first, by restoring a physiologic angle of 10 to 15 degrees at the level of the internal nasal valve and, second, by bringing the middle third of the nose into the right balance with the upper and lower thirds. Spreader grafts can be fsc0256 15 September 2006 8:11 pm 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 ARTICLE IN PRESS 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 print & web 4C/FPO Septal Considerations in Revision Rhinoplasty Fig. 9. Case 2. Patient aged 28 years subjected to three previous septorhinoplasties. The patient presented with persistent deviation of the dorsal septum with an inverted V deformity, nasal obstruction, a malpositioned septal graft on the nasal dorsum, and an overprojected tip. Revision rhinoplasty was performed using two conchal spreader grafts, removal of the previous graft, and dome truncation. (A) Collapse of the middle nasal vault is evident during forced inspiration. (B,D,F,H) Preoperative views. (C,E,G,I) Postoperative views 1 year after surgery. fsc0256 15 September 2006 8:11 pm 9 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 ARTICLE IN PRESS Fig. 9. (continued). Fig 9. (continued). Base view prior to (H) and post (I) revision surgery. print & web 4C/FPO 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 Boccieri & Macro print & web 4 10 harvested from the middle portion of the cartilaginous septum and from the posteroinferior region and are generally cut and pared down to about 1 to 4 mm in thickness, 3 to 6 mm in height, and 8 to 25 mm in length [30]. The problem most often encountered in the lower third of the nose after septorhinoplasty is an underprojected ptotic nasal tip. Such anomalies can present immediately after the operation or years later owing to the force of gravity and the cicatricial contraction of the cutaneous covering. A columellar strut, shield graft, or onlay tip graft are the procedures indicated for correction. These grafts can be obtained from any part of the septum but preferably are harvested from the cartilaginous portion adjacent to the ethmoidal bone where the septum is thicker and tougher and better suited to the required function of structural support. The columellar strut is rectangular in shape and is inserted and sutured in place between the two medial crura from the nasal spine to the domes [31]. This graft proves particularly useful to improve the projection and support of the nasal tip and to straighten and reinforce the columella. A further increase in the projection and definition of the nasal tip can be obtained by means of a shield graft. This versatile graft is roughly trapezoidal in shape and is sutured with 6.0 nylon to the front of the medial crura in their upper portion to protrude approximately 1 to 2 mm over the domes. The shield graft also gives symmetry to the tip, masks irregularities of the domes, and determines the supratip break. Another graft serving to increase projection is the tip onlay graft described by Peck, which can also be positioned in layers on the domes by means of the umbrella technique. Alar batten grafts are also obtained from the nasal septum and are frequently used in revision rhinoplasties [32]. These rectangular curvilinear grafts measure about 10 to 15 mm in length and 4 to 8 mm in width. They are used in cases of excessive resection of the lateral or upper lateral cartilages with weakening and retraction of the lateral nasal wall, situations that often cause respiratory problems with collapse of the nasal valve during inspiration. Alar batten grafts are lodged in a precisely formed pocket extending from the lateral third of the lateral crura to the piriform aperture. The convex side of the graft is placed on the outside so as to lateralize the collapsed portion of the lateral nasal wall. Another type of graft used in revision rhinoplasty and obtained primarily from the septum is the lateral crural strut graft [33], consisting of a strip of cartilage about 3 to 4 mm in width and 15 to 25 mm in length. This graft is secured to the deep surface of the lateral crura with two or three sutures of 5.0 Vicryl. This procedure can be used in secondary rhinoplasty to correct alar rim retraction and alar rim collapse owing to excessive resection of the lateral crura. The cartilage of the septum is the only one that can be used in crushed form as a filling graft in the closing phases of revision to finish off and optimize the contours of the nasal pyramid. Discussion A septal anomaly is frequently found subsequent to septorhinoplasty and can stem from a pathology already present before the operation or an iatrogenic pathology. The abnormalities of the nasal septum presented by patients often differ greatly, and it is difficult to find any features common to them all. In their pathogenesis, there is always the common fact of failure in the initial operation to find the right proportion between how much should be removed and how much should be left of this fsc0256 15 September 2006 8:11 pm 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 ARTICLE IN PRESS 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 print & web 4C=FPO Septal Considerations in Revision Rhinoplasty Fig. 10. Case 3. Woman aged 31 years subjected to one previous septorhinoplasty presenting with a supratip deformity caused by an overprojecting caudal dorsum as well as persistent septal deviation and an alar collapse on the right side. Correction was obtained through resection of residual excessive caudal dorsum and placement of a septal spreader graft and alar graft on the right side. (A,C,E,G) Preoperative views. (B,D,F,H) Postoperative views 1 year after surgery. fsc0256 15 September 2006 8:11 pm 11 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 Boccieri & Macro ARTICLE IN PRESS print & web 4C=FPO 12 Fig. 11. Septal graft of cartilage with ethmoidal bone harvested during revision rhinoplasty. important anatomic structure. Added to this in all cases is the difficulty of re-establishing a balance between the nasal septum and the surrounding structures, whose position is influenced by the septum, which, in turn, is influenced by certain close anatomic connections. When the nasal septum is missing, examination of the latest literature shows that most authors agree on the need to reconstruct an L-shaped structure similar to the original one. Onlay grafts, which disguise the esthetic deformity but are functionally inefficient, are thought to be useless. Despite agreement on this common reconstructive aim, opinions are divided on the type of graft to use, with experts variously advocating rib, alloplastic materials, and the auricular concha [34–37]. Obtaining grafts from the rib leaves an unavoidable visible scar, and there is a risk of morbidity of the donor site. Moreover, the graft is not easy to reshape and tends to warp over time. Alloplastic grafts do not possess the particular elasticity of the tissues they are to replace and are subject to infection and extrusion. If performed by means of a retroauricular approach, leaving the root of the helix and the fold of the antihelix intact, the harvesting of grafts from the auricular concha leaves no visible signs. As autologous cartilage, it also provides the best guarantees of resistance to infection and a low degree of resorption as well as being easy to shape. Nevertheless, the auricular cartilage presents histologic characteristics differing from those of the structure to be replaced, being elastic and not hyaline, unlike the nasal septum. From a macroscopic viewpoint, the concha is curved rather then straight like the septum and not sturdy enough to serve as a supporting structure. The technique described for reshaping the conchal graft by means of incisions, figure-eight sutures, and the use of spreader grafts harvested from the concha and attached to the concha itself succeeds in rectifying these negative aspects of the auricular cartilage [12]. Although retaining elasticity, the neo-septum obtained from the auricular concha is ultimately very similar to the nasal septum to be reconstructed in terms of toughness and straightness. Moreover, the presence of spreader grafts on the dorsal side of the graft can prove useful in reconstructing the middle nasal vault in patients in whom the upper lateral cartilages were subjected to abundant excision during the previous operation. In patients in whom the upper lateral cartilages are normally present, the spreader grafts should instead be secured in a lower position with respect to the dorsal edge of the neo-septum so as to have no esthetic effect. The use of spreader grafts has constituted a great step forward in the correction of persistent deviations of the nasal septum after septorhinoplastic surgery; however, in these cases, the therapeutic strategy requires a gradual and sequential approach in which the use of these grafts may not be needed. Careful analysis of the cause of the septal deviation, its location, and its extent is an indispensable prerequisite for selection of the most suitable procedure to solve the problem. In the patient who has deflection of the nasal septum in the inner portion of the nasal cavities with no involvement of the peripheral structure and the presence of respiratory problems alone, it will be necessary to remove the deviated part (above all if it is osseous) or to perform a septoplasty. This situation is not common in dealing with the results of septorhinoplasty, because it would mean that the functional pathology had been completely ignored during the previous operation. The persistence of deviation owing to the use of techniques incapable of countering the postoperative deforming forces responsible for relapse is instead more frequently encountered. As noted previously, an anatomic memory of the deviation tends to make the cartilaginous septum return to the original incorrect position. In this connection, many techniques using morselizations, incisions, and sections fail to ensure satisfactory end results even though the septal pillar is left intact to perform its function of structural support. Although effective, the treatment adopted is sometimes performed incompletely. During performance of the ‘‘swinging door’’ technique, for example, the surgeon may make a vertical incision but fail to excise a strip or to secure adequately the detached segment anteriorly to the nasal spine. Conversely, overaggressive resection of the nasal septum often causes collapse of the nasal dorsum with the presence of notches and hollows to varying degrees. To prevent such problems, the septoplasty techniques regarded to be safest are those making use of staggered incisions, which interrupt the cartilaginous spring without destroying the continuity within the structure. In all cases of persistence of septal deviation, it is indispensable during revision to neutralize all of fsc0256 15 September 2006 8:11 pm 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 ARTICLE IN PRESS Septal Considerations in Revision Rhinoplasty 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 the deforming forces that support the cartilaginous memory [7]. The cartilaginous septum can be detached from the extrinsic deforming forces of the surrounding structures by means of osteotomies, extramucous separation from the upper lateral cartilages, and the severing of attachments with the vomer, maxillary crest, and ethmoid. The septum is then freed from the effect of the intrinsic deforming forces within the cartilage by means of incisions to open the cartilaginous spring and straighten the septum. In most cases of deviation of the dorsal portion of the septum, it is advisable to combine these procedures with the use of spreader grafts, which ensures a stable result over time, counters the cartilaginous memory, and reinforces the septal structure. The placement of a spreader graft on the concave side of the septal deviation generally provides an excellent solution in all cases of medium severity. The crossbar graft technique is most appropriate in more serious cases of crooked noses, whereas the thickness of a single spreader graft could prove insufficient to correct the deformity [22]. In surgical revision, this type of graft can be obtained from the septal cartilage, if still present, or the ethmoidal bone. The final effect is to straighten the dorsal septum, reinforce the L-shaped structure, and counter to the greatest possible degree the deforming forces extrinsic and intrinsic to the septum that tend to cause relapse over time. The crossbar graft also exerts lateral pressure on the upper lateral cartilage on the concave side, restoring a correct angle of the internal nasal valve and harmonizing the esthetic lines from eyebrow to tip on both sides. An alternative to the use of one spreader graft obtained from the septum is two spreader grafts obtained from the auricular concha. Although not as tough as septal cartilage, grafts of auricular cartilage can serve to guide and reinforce the structure when placed on both sides of the dorsal septum. These bilateral spreader grafts are indicated in revisions involving not only the correction of septal deviation but also reconstruction of the middle nasal vault owing to the presence of an inverted V deformity. Supratip deformity is another of the most frequent causes prompting revision rhinoplasty. This unesthetic convexity, located immediately above the nasal tip, was long attributed exclusively to the presence of an excess of dorsal septum in that area. Sheen stated in 1979 that many supratip deformities were, in fact, not due to this cause but to overresection of the caudal dorsum [25]. In such cases, overzealous resection creates a void that stimulates the formation of scar tissue to fill it up. An excess of this tissue creates the polly beak deformity. Given that very different forms of treatment are possible, correct diagnostic analysis is essential in addressing this problem. Toward this end, study of the case history can provide useful information about previous instances of scar tissue formation, and palpation of the supratip region can ascertain the consistency of the convexity present. In the patient who has an underresected caudal dorsum, the correct treatment cannot be other than appropriate and carefully calibrated excision of the septum in the region of the supratip. Conversely, in the patient who has an overresected caudal dorsum and excessive scar tissue, the surgical treatment must seek not only to remove the fibrous excess but also to avoid recreating the void that actually caused the deformity in the first place. If satisfactory results are to be obtained, crucial steps are the placement of cartilaginous grafts in the area of the supratip, a compressive nasal splint, and careful prolonged postoperative taping. It has also been suggested that a Vicryl suture can be used in this area between the subcutis and the cartilage of the dorsal septum to eliminate the void [24]. The creation of an esthetically valid supratip break is often difficult to achieve owing to the different factors involved in its definition. The calculation of a difference in height of 6 to 10 mm between the dorsal septum and the domes is a rough guide that must be adapted in relation to other parameters such as the thickness of the skin and projection of the tip [24,28]. The same holds true for the angle formed between the perpendicular through the domes and the cephalic border of the lower lateral cartilages, which should ideally range between 45 and 30 degrees according to whether the skin is thin or thick [28]. All of these numerical calculations assume that the intraoperative projection of the nasal tip will remain the same in the later postoperative result; however, the mechanisms of tip support are often affected by the surgical maneuvers performed during revision, such as access incisions severing the membranous septum or the attachments between septum and domes. It is nearly always necessary in these cases to use a columellar strut to ensure that tip projection is controlled and stable over time. In treatment of the polly beak deformity, a further and highly variable factor can sometimes thwart even the efforts of the most expert surgeon, namely, postoperative cicatrization. Some patients tend to present with hypertrophic cicatrization even in the absence of any triggering element. This tendency, which can sometimes be revealed by other hypertrophic or keloid scars, must be detected through careful postoperative observation and treated with injections of triamcinolone in the supratip area. Other variables involved in the definition of the supratip break include the sex and taste of the fsc0256 15 September 2006 8:11 pm 13 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 14 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 Boccieri & Macro ARTICLE IN PRESS patient, the taste of the surgeon, and current fashion. A depression in the area of the supratip may correspond to an esthetic ideal of female but not male beauty, and some patients may prefer an almost completely straight profile, which also appears to be in line with contemporary fashion. The cartilaginous septum is the central element involved in planning a revision operation not only as the location of impairments to be corrected but also as a possible source of material for reconstructive grafts. When present, the cartilage of the nasal septum has long been recognized as preferable to other types of cartilage and to alloplastic grafts [38]. It is easy to harvest and carve, structurally suitable for supporting functions, thick and useful for filling depressions, easy to flatten, and displays little tendency to warp. Because it is elastic and not hyaline, unlike the septum, the cartilage of the auricular concha is less sturdy and less capable for providing support. Its curved shape makes it generally suitable for reconstruction of the nasal wing. Rib cartilage is of the hyaline type, like the septum, but harvesting leaves a visible scar, and the donor site presents a certain degree of morbidity. It is also more difficult to shape, fragile, and subject to warping over time [39]. Grafts obtained from the cartilaginous septum are effective in the reconstruction of all sections of the nasal pyramid and can be adapted to meet all of the specific requirements presented by each individual case. Unlike most alloplastic grafts, these grafts combine toughness with sufficient elasticity to allow the ‘‘mobile part’’ of the nose to preserve its physiologic flexibility. Like the other cartilaginous grafts, they are largely impervious to infection and resorption, the latter being in most cases minimal and short-lived with a tendency to decrease considerably after the initial postoperative period [40]. A common objective exists no matter which reconstructive technique is employed, namely, the restoration of a straight, sturdy, and elastic L-shaped septal structure. Correction of the nasal septum constitutes the first indispensable phase of reconstruction during revision when there are also other nasal structures to be reconstructed. The symmetry and support of the nasal pyramid in all of its components will depend on the precision with which this important internal pillar is restored. Nasal respiratory function will also hinge upon this structure being restored as closely as possible to its physiologic state. Summary The correction of impairments of the nasal septum is a crucial surgical stage in revision rhinoplasty. The pathologic elements observed most frequently in clinical practice include structural deficits of the caudal septum, the persistence of septal deviation, and deformity of the supratip area. This article is intended as a guide to the gradual analytical correction of the different anomalies of the nasal septum, with the septum being the primary source of material for the most common types of reconstructive grafts. References [1] Tardy ME. Rhinoplasty: the art and the science. In: Surgical Anatomy, Vol. I. Napoli: EdiSES Srl; 1999. p. 87–99. [2] Toriumi DM, Ries WR. Innovative surgical management of the crooked nose. Facial Plast Clin N Am 1993;1:63–78. [3] Wustrow TPU, Kastenbauer E. Surgery of the internal nasal valve. Facial Plast Surg 1995;11:213–27. [4] Teller DC. Anatomy of a rhinoplasty: emphasis on the middle third of the nose. Facial Plast Surg 1997;13:241–52. [5] Sheen JH. Spreader graft: a method of reconstructing the roof of the middle nasal vault following rhinoplasty. Plast Reconstr Surg 1984; 73:230–7. [6] Boccieri A, Macro C. The use of spreader grafts in primary rhinoplasty. Ann Plast Surg 2005;55(2): 127–31. [7] Byrd HS. 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