3D longitudinal evaluation of dental arch in children with unilateral cleft lip and palate

• Ano de defesa: 2017
• Autor(a) principal: Ambrosio, Eloá Cristina Passucci
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Biblioteca Digitais de Teses e Dissertações da USP
• Palavras-chave em Português: Cleft lip; Cleft palate; Dental models; Fenda labial; Fissura palatina. Modelos dentários.
• Link de acesso: https://www.teses.usp.br/teses/disponiveis/25/25145/tde-16112021-120131/

This study aimed to analyse the alterations of the maxillary dental arches of children with cleft lip and palate before and after the primary plastic surgeries. The sample comprises 150 digitized dental casts from children, age between 3 and 36 months, divided in: unilateral complete cleft lip (UCL) and unilateral complete cleft lip and palate (UCLP). The dental arches were evaluated in the following phases: before cheiloplasty (T1), before palatoplasty (T2), and one year after palatoplasty (T3). The digitized dental casts were measured three-dimensionally through the software of the stereophotogrammetry systems. The following distances were analysed: intercanine and intertuberosity distances; anterior and total dental arch length; dental arch area. The intraexaminer agreement analysis demonstrated that all measurements were reproductible (p>0.05). Independent t test and Mann-Whitney test were used to verify the changes occurred between groups. Repeated-measures ANOVA followed by Tukey test analysed the different phases of the rehabilitation protocol in the group UCLP. Paired t test and Wilcoxon test compared the different phases of the group UCL. At T1, intercanine and intertuberosity distances had statistically higher values in group UCLP than in group UCL. The dental arch lengths and the area were significantly smaller in group UCLP. Before palatoplasty, maxillary dimensions significantly increased, except for intertuberosity distance in UCL. The intercanine distance and the anterior length had a significant decreased, but the intertuberosity measurement and the total dental arch length showed significant increase between T1 and T3 (group UCLP). Based on these results, the primary plastic surgery negatively influences the bone segments growth and development of the maxillary dental archs of children with UCL and UCLP. The cheiloplasty negatively affected the development of the anterior palate, more evidently for the group UCLP. The palatoplasty did not affect the growth of the posterior palate.