Intercenter comparison of different maxillary expansion modalities in patients with complete cleft lip and palate

• Processo: 12/50527-2
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Data de Início da vigência: 01 de setembro de 2012
• Data de Término da vigência: 31 de agosto de 2013
• Área do conhecimento: Ciências da Saúde - Odontologia - Ortodontia
• Acordo de Cooperação: University of Southern California
• Pesquisador responsável: Daniela Gamba Garib Carreira
• Beneficiário: Daniela Gamba Garib Carreira
• Pesquisador Responsável no exterior: Stephen Yen
• Instituição Parceira no exterior: University of Southern California (USC), Estados Unidos
• Instituição Sede: Hospital de Reabilitação de Anomalias Craniofaciais (HRAC). Universidade de São Paulo (USP). Bauru , SP, Brasil
• Vinculado ao auxílio: 09/17622-9 - Avaliação dos efeitos dentoesqueléticos e periodontais da expansão rápida da maxila diferencial em pacientes com fissura lábiopalatina completa e bilateral, AP.R
• Assunto(s): Técnica de expansão palatina Fenda labial Fissura palatina Transplante ósseo
• Palavra(s)-Chave do Pesquisador: Cleft Lip And Palate | Maxillary Expansion | Maxillary Growth | Orthodontics

Resumo

There is a lack of scientific literature comparing the effects of slow and rapid maxillary expansion in patients with complete cleft lip and palate. Purpose: The null hypothesis is that the orthopedic expander and the quad-helix produce similar changes in the maxillary arch widths, palate volume and posterior maxillary tooth tipping in patients with unilateral complete cleft lip and palate. Methodology: The study sample will be composed by 60 patients with unilateral complete cleft lip and palate and maxillary dental arch constriction treated with rapid maxillary expansion (group I, n=30) and slow expansion (group II, n=30). Maxillary expansion will be performed in the mixed dentition before bone graft procedure. Conventional dental casts will be collected before expansion and 6 months after the expansion, when the appliance is removed. After digitalization of the maxillary dental casts using the 3Shape R700 3D scanner (3Shape A/S, Copenhagen, Denmark), maxillary dental arch transverse dimensions, buccolingual inclination of posterior teeth, dental arch perimeter and palate volume will be measured. Dependent "t" tests will be used for evaluating the changes between phases, and independent "t" tests will be used for intergroup comparisons. (AU)