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Effect of cheiloplasty on the maxillary of children with cleft lip and palate: 3D analysis of linear measurements, area, volumetric and image superposition of dental arches

Grant number: 20/07072-0
Support type:Scholarships in Brazil - Master
Effective date (Start): September 01, 2020
Effective date (End): August 31, 2022
Field of knowledge:Health Sciences - Dentistry - Pediatric Dentistry
Principal researcher:Thais Marchini de Oliveira Valarelli
Grantee:Gabriela Mendonça Rando
Home Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil

Abstract

The aim of this study will be to evaluate the effect of cheiloplasty on the maxillary of children with cleft lip and palate operated at different ages. The sample will consist of children with complete cleft lip and palate unilateral, from 3 to 60 months, operated by the same surgical technique and complete documentation. Children will be divided into 2 groups: Group 1 - children operated at 3 months of age by the Millard technique for lip closure and at 12 months of total palate by the von Langenback technique; Group 2 - children operated at 9 months of age by the Millard technique for lip closure and at 12 months of total palate by the von Langenback technique. Children will be evaluated before cheiloplasty surgery and at 5 years of age. The measurements of the dimensions of the dental arches will be performed on the three-dimensional images of dental models, digitized by means of a commercial laser scanner system, and the measurements will be carried out using the 3D stereophotogrammetry system software. Surface, area, volumetric measurements and image superposition of dental arches will be obtained. The three-dimensional images of the models will be evaluated using the Atack index. Two previously trained and calibrated examiners will perform the analyzes. For the analysis of intra-examiner and inter-examiner reproducibility, the Interclass Correlation Coefficient (ICC) will be used. In the intragroup analysis, data showing normal distribution will be analyzed by the paired T test, if necessary, non-parametric tests will be applied. For intergroup analysis, the independent t-test will be applied for comparison between groups when the data show normal distribution, if necessary, non-parametric tests will be applied. The level of significance of 5% will be applied to consider statistically significant differences. (AU)

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