Palatal Expansion Screw

Use Instruction
Palatal Expansion Screw
Expanders are devices designed to correct the occlusion of certain maxillo mandibular regions
through the transversal or longitudinal movement of the teeth.
The expanders have as main characteristic of operation the activation of a central screw through a
specific key which promotes the movement of metal bodies, resulting in the controlled application of
forces against the teeth, promoting dental arch correction through orthodontic or orthopedic
movements according to the needs observed clinically.
Such devices can be used with other orthodontic devices, their use may be fixed to the patient,
or removable, in this case such devices are assembled into acrylic molds according to the mouth
morphology of each patient.
These devices are generally employed in the functional orthopedics for the expansion of the
maxillary dental arch in its transverse direction by applying side forces against the posterior
maxillary dentition, resulting in the separation of midpalatal suture, having as effect, the increase in
the transverse dimension of the basal maxillary bone by orthopedic movements.
Considered a rapid expansion device, used as a fixed mechanism, its applied to the patient along
the palatal contour and its fixation can be assisted with the use of lingual and buccal wire support,
which allows greater rigidity of the device through anchorage on orthodontic bands or stainless
steel crowns by welding.
Such device is made of stainless steel with flexible arms to facilitate their shaping according to the
patient jaw morphology. After placement, the patient may be responsible for the expander activation
as instructed by the orthodontist.
Use Indication:
Expanders for palatal expansion are indicated for correction of maxillomandibular deficient relations
in cases of mixed / precocious permanent dentition, or posterosuperior bi-lateral crossbite as a
result of deficiency of the apical base of the jaw, as well as cases of anterior or posterior crossbite
that are not too severe.
The use of this device is contraindicated in cases of Class II, division 1 or superior prognathism,
since the rapid expansion technique will intensify these effects. The same condition of
contraindication is valid for patients that already have a very accentuated inferior bite plane, as this
plane is intensified by the rapid expansion.
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Use Instruction
Warnings:
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- Non reusable product, as its reuse may cause cross infection, and loss of mechanical
properties due to natural wear.
- Product to be applied by orthodontic qualified professional only.
- Non-sterile product, the professional is responsible for the good work practices.
NON
STERILE
- This product contains Nickel and Chromium. A small percentage of the population is allergic
to these metals. In case of allergic reactions, advise the patient to seek medical attention.
- Do not use the product if the packaging is violated.
- This product hasn’t been evaluated for compatiblity and safety in Magnetic Resonance
environment, the patient should be advised of this condition.
- Excessive heating of the rod can compromise the material structure, reducing its
mechanical properties and leading the same to fracture.
- For patient safety, in applications of intraoral activation, use only the Expander key with
long stem provided with the product.
Expander Key
Lock
Braking
Ring
The Expanders Morelli have a braking ring designed to
prevent screw returning during activation. This ring is
made of high quality polymer. In cases where welds are
executed close to the region of the ring, it is recommended
to protect the same, so as to avoid excessive heating of the
material to ensure the effectiveness of the product. The
protection can be perform by applying specific paste, plaster,
alginate or cotton humidified with water.
Centering Lock
Wire Bending
To conform the expander rods use appropriate tools, as the
Wire Bender (cod. 75.02.001) and the trident plier.
Perform the necessary bends with the desired angle, avoiding
submit the rods to torsion, that can weaken the rod as well as
the weld, causing their fracture.
Avoid torsion
on the rod
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Use Instruction
Band
Flame
While preparing the expander avoid direct flame on the body,
even during the welding, avoiding damage the product.
Protect
this area
This use instructions refers to the following products:
DESCRIPTION
CODE
65.05.010
Orthodontic Expansion Screw - Palatal Split - Expansion 7mm
65.05.011
Orthodontic Expansion Screw - Palatal Split - Expansion 9mm
65.05.012
Orthodontic Expansion Screw - Palatal Split - Expansion 11mm
65.05.013
Orthodontic Expansion Screw - Palatal Split - Expansion 13mm
Composition / Component Information:
- Stainless Steel;
- Polypropylene;
- Silver Solder.
Validity: 05 years
Manufactured by:
Dental Morelli Ltda.
Alameda Jundiaí, 230/250 – Jardim Saira
ZIP Code: 18085-090 Sorocaba – SP – Brazil
Tel.: (55) 15-3238 8200 / 0800 7031455
Technical Responsible: Roger Morelli CREA-SP 5060214985
European Representative
Nuno Flores
Al. Bonifácio Lázaro Lozano, 3 Floor O – C
Oeiras – Portugal – 2780125
Tel.: 351 21 4439292
Use Instructions nº 01.09.508 - Revision 1
MS/ANVISA Registration: 10396830038
Technical Name: Orthodontics Components
Commercial Name of the Product Family:
Appliances for Maxillary Functional Orthopedics
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