Analysis of the Dentoskeletal Effects of the Expander With Differential Opening: a Randomized Clinical Trial
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Maxillary Constriction
- Sponsor
- University of Sao Paulo
- Enrollment
- 50
- Locations
- 1
- Primary Endpoint
- Maxillary and mandibular inter-first permanent molar distances
- Last Updated
- 9 years ago
Overview
Brief Summary
This study evaluates the dentoskeletal effects of the expander with differential opening in orthodontic patients in the mixed dentition. Half of participants will undergo rapid maxillary expansion (RME) using the expander with differential opening, while the other half will undergo RME using the conventional Hyrax expander.
Detailed Description
Recently, a rapid maxillary expander with differential opening was developed aiming to treat maxillary constrictions greater in the anterior region compared to the posterior region of the maxillary dental arch. The aim of this study is to evaluate the dentoskeletal effects of the expander with differential opening in orthodontic patients in the mixed dentition. Material and methods: Fifty patients with maxillary constriction in the mixed dentition will be prospectively and randomly allocated in one of two study groups. The experimental group will comprise 25 patients who will be submitted to rapid maxillary expansion with the expander with differential opening. The control group will be comprised by 25 individuals who will undergo rapid maxillary expander with the Hyrax expander. Digital dental models will be acquired immediately pre-expansion (T1) and six months post-expansion (T2). The Orthoanalyzer™ software will be used to measure maxillary and mandibular widths, arches perimeter, arches lengths, palatal depth, and inclinations of maxillary and mandibular canines and permanent first molars. The intergroup and interphase comparisons will be analyzed using t tests and paired t tests, respectively (p\<0.05).
Investigators
Arthur César de Medeiros Alves
University of São Paulo
University of Sao Paulo
Eligibility Criteria
Inclusion Criteria
- •Both sexes;
- •Ages ranging from 7 to 11 years old;
- •Mixed dentition;
- •Maxillary constriction;
- •No previous orthodontic treatment.
Exclusion Criteria
- •Cleft lip and palate and associated syndromes;
- •Systemic and/or neurological diseases.
Outcomes
Primary Outcomes
Maxillary and mandibular inter-first permanent molar distances
Time Frame: 6 months
Maxillary and mandibular inter-second deciduous molar distances
Time Frame: 6 months
Maxillary and mandibular inter-first deciduous molar distances
Time Frame: 6 months
Maxillary and mandibular inter-deciduous canine distances
Time Frame: 6 months
Maxillary and mandibular dental arches perimeters
Time Frame: 6 months
Maxillary and mandibular dental arches lengths
Time Frame: 6 months
Palatal depth
Time Frame: 6 months
Inclination of maxillary and mandibular first permanent molars
Time Frame: 6 months
Inclination of maxillary and mandibular deciduous canines
Time Frame: 6 months
Amount of interincisor diastema
Time Frame: 10 days
Secondary Outcomes
- Amount of differential expansion on the maxillary and mandibular dental arches(6 months)