Efeito do laser de baixa intensidade no procedimento de expansão rápida da maxila

• Ano de defesa: 2009
• Autor(a) principal: Cepera, Fernanda
• Orientador(a): Siqueira, Danilo Furquim
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Metodista de São Paulo
• Programa de Pós-Graduação: PÓS GRADUAÇÃO EM ORTODONTIA
• Departamento: Ortodontia
• País: BR
• Palavras-chave em Português: Laser; Regeneração óssea; Densidade óssea; Terapia a laser de baixa intensidade; Técnica de expansão palatina
• Palavras-chave em Inglês: Laser; Bone regeneration; Bone density; Laser therapy low-level; Palatal expansion technique
• Área do conhecimento CNPq: CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA::ORTODONTIA
• Link de acesso: http://tede.metodista.br/jspui/handle/tede/1267

The proposal of the following study was to evaluate the effects of low intensity laser, in the procedure of rapid palatal expansion. 27 individuals were utilized, with age average of 10.2 years-old, splitted in two groups: laser group (n=14), pertaining rapid palatal expansion with laser application, and laserless group (n=13), pertaining only rapid palatal expansion. The expansion bolt activation patttern utilized was 1 complete turn at the first day, and half turn every day until the overcorrection. A diodo laser was utilized (TWIN Laser MMOptics®, São Carlos), according to the following application pattern: wave lenght 780nm, power 40mW, density 10J/cm2, accross 10 spots localized around the median palatine suture. The application stages were: L1 (from first to fifh day), L2 (bolt's lock and the 3 subsequent days), L3, L4 and L5 (after 7, 14 and 21 days after L2, respectively). Occlusal radiographies were taken with the aid of an aluminum scale for densitometric referencial, in different timing: T1 (initial), T2 (bolt's locking day), T3 (3 to 5 days from T2), T4 (30 days from T3), T5 (60 days from T4). The x-ray pictures were digitized and submitted to an image treatment program (Image Tool - UTHSCSA, Texas, USA), for optical density mensuration, on the previsouly selected areas. To realize the statistical tests, it was used the covariance analysis using as covariate the time for the evaluated phase. It all tests it was adopted the significance level of 5% (p<0,05). For the Laser Group the data shows a significant density reduction during the bolt aperture (opening) (T2-T1), a significant density increase in the final evaluation period (T5-T2), and another increase during the regeneration period (T5-T2). From the moment the expander bolt aperture phase ended. While in the Laserless Group the density did not show a statistically significant difference in none of the analyzed periods. The results indicated that the laser generated considerable better openining of the median palatine suture besides the influence in the suture bone regeneration process, accelerating its recovery process.(AU)