Diseases of the musculoskeletal system and connective tissue
Conditions
Interventions
Forty-two pacients, female and male, aged to 11-14 year-old, with bilateral or unilateral posterior crossbite and with maxillary atresia will be treated through rapid maxillary expansion. Patients wil
Group2: 21 patients treated with conventional hyrax (tooth-supported expander)
Device
Sponsors
Faculdade de Odontologia da Universidade de São Paulo
Faculdade de Odontologia da Universidade de São Paulo
Eligibility
Inclusion criteria
Inclusion criteria: Patients with maxillary transverse deficiency; unilateral or bilateral posterior crossbite; aged 11 to 14 years; male and female; patients should have no cleft lip; patients must be in the permanent denture phase.
Exclusion criteria
Exclusion criteria: History of previous orthodontic treatment; presence of systemic diseases; presence of congenital deformity; loss of permanent teeth or agenesis.
Design outcomes
Secondary
| Measure | Time frame |
|---|---|
| Expected to find: increased nasal cavity size;;Expected to find increased size of the base of the jaw;;Expected to find: increased dimension between the apexes of the first premolars and first permanent molars;;Expected to find: increase in dimension between first premolar and first permanent molar crowns;;Expected to find: increased inclination of premolars and first permanent molars;;Expected to find:decreased height of the buccal bone ridges of the premolars and first permanent molars and decreased buccal and palatal cortical thickness of premolars and first permanent molars | — |
Primary
| Measure | Time frame |
|---|---|
| It is expected to find an increase in maxillary width amplitude, measured in meters, by assessing cone beam computed tomography in Dolphin software in both groups. It is believed that this increase may be greater in one of the groups, suggesting that an appliance may have a superior skeletal effect. All measurements in this study will be performed using the Dolphin software itself, where reference points will be used for each specific measurement. | — |
Countries
Brazil
Contacts
Public ContactJosé Neto
Faculdade de Odontologia da Universidade de São Paulo
Outcome results
None listed