Orthodontic Retention on the Maxillary Stability After SARME Using Laser Scanner

Max Domingues Pereira

Status: Completed

Conditions: Maxillary Hypoplasia

Treatments: Other: Laser Scanner; Procedure: Surgically Assisted Rapid Maxillary Expansion (SARME)

Study type: Interventional

Funder types: Other

Identifiers

NCT01770782

0949/09

Details and patient eligibility

About

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

Full 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.

Enrollment: 30 patients

Sex: All

Ages: 18 to 40 years old

Volunteers: No Healthy Volunteers

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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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30 participants in 2 patient groups

Laser Scanner

Other group

Description:

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).

Treatment:

Other: Laser Scanner

SARME

Other group

Description:

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.

Treatment:

Procedure: Surgically Assisted Rapid Maxillary Expansion (SARME)