Orthodontic Retention on the Maxillary Stability After SARME Using Laser Scanner

Study Overview
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Brief Summary
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The objective of this study was to evaluate the effect of the orthodontic retainer on transverse maxillary dental and skeletal stability after SARME.

Detailed Description
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Methods: Ninety digitized dental casts of 30 adult patients (18 males and 12 females) submitted to SARME using the Hyrax expansion appliance were evaluated. Patients were distributed into two groups: Group Without Retention (GSC) n = 15; and Group With Retention (GCC) n = 15. In the GCC group, a Transpalatal Arch (TPA) was installed for retention soon after removal of the expander. The dental casts were scanned using a Vivid 9i 3D laser scanner (Konica Minolta, Wayne, NJ). The plaster models were performed preoperatively (T1), 4 months after the expander was removed (T2), and 10 months after the end of the expansion (T3). The distances measured were Inter-Cusps of Premolars and Molars (Inter-Cusp PM) (Inter-Cusp M), Inter-Cervicals of Premolars and Molars (Inter-Cervical PM) (Inter-Cervical M), Inter-WALA edges of Premolars and Molars (PM Inter-BW) (BW Inter-M), palatal height at the molar, and palatal area and volume at T1, T2, and T3.

Official Title
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Orthodontic Retention on Dental and Skeletal Maxillary Transverse Stability After Surgically Assisted Rapid Maxillary Expansion (SARME)Using Laser Scanner

Conditions
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Maxillary Hypoplasia

Intervention / Treatment
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* Procedure: Surgically Assisted Rapid Maxillary Expansion (SARME)
* Other: Laser Scanner


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adult patients with bilateral transverse maxillary deficiencies greater than 5 mm Exclusion Criteria: Patients with previous histories of maxillary surgery, congenital craniofacial malformations and unilateral transverse maxillary deficiencies

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 40 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: Laser Scanner<br>Laser Scanner (Vivid 9i® - Konica Minolta)was used to digitize the study casts. After scanning the dental casts a 3D virtual dental casts was used to realize all measurements (pre-treatment, 4 months and 10 months). | Other: Laser Scanner<br>* Laser Scanner Vivid 9i was used to digitize the study models. The 3d virtual dental casts is a reliable copy of the original dental casts. On this virtual casts all measurements (linear, area and volume of the palate) was done to evaluate the stability after SARME.<br>|
| Other: SARME<br>Surgically Assisted rapid Maxillary Expansion -SARME was used for the treatment of transverse maxillary deficiency.This procedure is a combination of a surgical procedure and orthopedic expansion of the maxilla. | Procedure: Surgically Assisted Rapid Maxillary Expansion (SARME)<br>* Surgical technique is performed with subtotal LeFort I osteotomy with separation of the pterygomaxillary fissure.The procedure was performed under general anesthesia using endotracheal intubation. Following the osteotomies, the expander screw was activated to 1.6 mm intraoperatively until a small diastema was observed between the upper central incisors. The incision was sutured along two planes.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Maxillary Stability | Laser scanner to create a 3D virtual dental cast | up to 10 months after the end of expansion | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Palatal Expansion Technique, Orthognathic Surgery, Three Dimensional images