Submitted by Caroline Xavier (caroline.xavier@pucrs.br) on 2017-06-30T18:48:43Z No. of bitstreams: 1 DIS_RENATA_CORDOVA_PETERSEN_PARCIAL.pdf: 318790 bytes, checksum: 552b9985037ee747f8e9672be555f646 (MD5) / Approved for entry into archive by Caroline Xavier (caroline.xavier@pucrs.br) on 2017-06-30T18:48:49Z (GMT) No. of bitstreams: 1 DIS_RENATA_CORDOVA_PETERSEN_PARCIAL.pdf: 318790 bytes, checksum: 552b9985037ee747f8e9672be555f646 (MD5) / Made available in DSpace on 2017-06-30T18:48:54Z (GMT). No. of bitstreams: 1 DIS_RENATA_CORDOVA_PETERSEN_PARCIAL.pdf: 318790 bytes, checksum: 552b9985037ee747f8e9672be555f646 (MD5) Previous issue date: 2017-01-18 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Cleft lip and palate are common birth defects. Cleft patient undergone many surgical procedures in the midface, in early ages, that may affect the facial growth. This can result in midface deficiency and class III malocclusion that requires protraction of the maxila or surgical treatment. The maxillary advancement is the main procedure performed to treat patients with midface retrusion. One of the treatment alternatives, consists of using skeletal anchorage and elastics. However, these patients with cleft lip and palate usually present a nutritional deficiency in the early childhood, leading us to question about a possible compromise of their bone quality. The aim of this research was to evaluate the bone condition in the lower Canine regions (distal and mesial) and upper permanent first molars (mesial) using Cone Beam CT in individuals with and without cleft lip and palate, with and without growth potential. No statistical significant differences were found in the measures evaluated among the three groups. The values of cortical thickness and Gray Scale were similar in patients with and without cleft lip and palate, and with growth potential, when compared to adults. Therefore, patients with growth potential and cleft lip and palate have the same bone conditions for receiving mini implants as the adult patients without cleft lip and palate. / Fissuras labiopalatinas sa?o defeitos conge?nitos que atingem a face do ser humano, sendo estabelecidas precocemente na vida intrauterina. Esses pacientes, ap?s a repara??o da fissura labial, acabam tendo o seu crescimento maxilar limitado o que frequentemente os deixa com a maxila atr?sica e um perfil c?ncavo, com necessidade de um tratamento que promova o avan?o maxilar e o recuo mandibular. Uma das alternativas de tratamento atuais, consiste na coloca??o de ancoragem esquel?tica na regi?o superior posterior e inferior anterior para uso de el?sticos intermaxilares. No entando, esses pacientes portadores de fissuras labiopalatinas, costumam apresentar uma defici?ncia nutricional na primeira inf?ncia levando-nos a questionar sobre um poss?vel comprometimento da sua qualidade ?ssea. Sendo assim, foram avaliadas, atrav?s da Tomografia Cone Beam, as regi?es distal e mesial dos caninos permanentes inferiores e mesial dos primeiros molares permanentes superiores, em indiv?duos com e sem fissura l?bio palatal, com e sem potencial de crescimento. Nesse estudo n?o foram encontradas diferen?as estatisticamente significativas nas medidas avaliadas entre os tr?s grupos. A espessura da cortical e a qualidade ?ssea, avaliada pela Escala de Cinza, nas regi?es avaliadas foram semelhantes em pacientes com e sem fissura labiopalatina e tamb?m ao grupo composto por pacientes adultos. Logo, pacientes em crescimento e com fissura labiopalatina, apresentaram as mesmas condi??es ?sseas para o recebimento de mini implantes do que os pacientes adultos e sem fissura labiopalatina.