Orthodontic Retention on Dental and Skeletal Maxillary Transverse Stability After Surgically Assisted Rapid Maxillary Expansion (SARME)Using Laser Scanner
Orthodontic Retention on Dental and Skeletal Maxillary Transverse Stability After Surgically Assisted Rapid Maxillary Expansion (SARME)Using Laser Scanner
The objective of this study was to evaluate the effect of the orthodontic retainer on transverse maxillary dental and skeletal stability after SARME.
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.
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Exclusion Criteria: