NCT01770782

Orthodontic Retention on the Maxillary Stability After SARME Using Laser Scanner

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

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (actual)
• Sponsor: Max Domingues Pereira · Academic / Other
• Sex: All
• Age: 18 Years – 40 Years
• Healthy volunteers: Not accepted

Summary

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

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.

Conditions

• Maxillary Hypoplasia

Interventions

Type	Name	Description
PROCEDURE	Surgically Assisted Rapid Maxillary Expansion (SARME)	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.
OTHER	Laser Scanner	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.

Timeline

• Start date: 2009-08-01
• Primary completion: 2010-02-01
• Completion: 2011-01-01
• First posted: 2013-01-18
• Last updated: 2013-01-18

Locations

1 site across 1 country: Brazil