| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 1.77 MB | Adobe PDF |
Authors
Abstract(s)
Objetivos: Avaliar, por meio de microtomografia computadorizada, a superfície vestibular de esmalte de pré-molares após remover o compósito remanescente proveniente da remoção de bráquetes autoligados metálicos, com três tipos de brocas. Métodos: O n utilizado foi de trinta pré-molares que foram inseridos em mandíbula de poliuretano rígido, para posteriormente receber a colagem de bráquetes. Em seguida foi realizada remoção dos bráquetes e remoção do compósito remanescente com brocas para turbina dentária distribuídas nos seguintes grupos: G1 – broca Shofu, G2 – broca 30 lâminas e G3 – broca 12 lâminas. Os dados foram avaliados estatisticamente utilizando o coeficiente de concordância de Kendall e o teste de Kruskall-Wallis com nível de significância 5%. Resultados: Foi observada áreas de esmalte com ranhuras mínimas na maior parte dos dentes. A remoção do remanescente resinoso com as diferentes brocas utilizadas no estudo, mostrou que o grupo 1 ocasionou menos dano significativo (p ≤ 0,05) na superfície do esmalte que o grupo 3 , mas não foi estatisticamente diferente (p ≥ 0,05) que o grupo 2. O escore 0 do índice de dano ao esmalte foi o mais observado pelos examinadores e o escore 3 o menos observado. Conclusões: As brocas utilizadas nesse estudo causaram injúrias na superfície do esmalte dentário após a remoção do compósito remanescente por meio do método utilizado, porém as alterações não foram significativas, sendo a broca Shofu a que causou menos dano, seguida da 30 e 12 lâminas.
Objectives: Evaluate, using computerized microtomography, the buccal surface of premolar enamel after removing the remaining resin from the detachment of selfbonded metal brackets with three types of drills. Methods: The sample consists of thirty premolars that were inserted in a rigid polyurethane jaw for receive the bonding of brackets. Then, these brackets were removed and remaining resin was removed with high speed drills distributed in the following groups: G1 - Shofu drill, G2 - 30 blade drill and G3 - 12 blade drill. The data were statistically evaluated using the Kendall coefficient of agreement and the Kruskall-Wallis test with a 5% significance level. Results: In most teeth, areas of satisfactory enamel were obtained, without or with minimal grooves. The removal of the resinous residue according to the different groups evaluated, showed that group 1 caused less significant damage (p ≤ 0.05) on the enamel surface than group 3, but not statistically different from group 2. Score 0 of the enamel damage index was the most observed by the examiners and score 3 the least observed. Conclusions: The drills used caused injuries in the tooth enamel surface after removing the remaining resin using the method used, but the changes were not significant, with the Shofu drill causing less damage, followed by 30 and 12 blades.
Objectives: Evaluate, using computerized microtomography, the buccal surface of premolar enamel after removing the remaining resin from the detachment of selfbonded metal brackets with three types of drills. Methods: The sample consists of thirty premolars that were inserted in a rigid polyurethane jaw for receive the bonding of brackets. Then, these brackets were removed and remaining resin was removed with high speed drills distributed in the following groups: G1 - Shofu drill, G2 - 30 blade drill and G3 - 12 blade drill. The data were statistically evaluated using the Kendall coefficient of agreement and the Kruskall-Wallis test with a 5% significance level. Results: In most teeth, areas of satisfactory enamel were obtained, without or with minimal grooves. The removal of the resinous residue according to the different groups evaluated, showed that group 1 caused less significant damage (p ≤ 0.05) on the enamel surface than group 3, but not statistically different from group 2. Score 0 of the enamel damage index was the most observed by the examiners and score 3 the least observed. Conclusions: The drills used caused injuries in the tooth enamel surface after removing the remaining resin using the method used, but the changes were not significant, with the Shofu drill causing less damage, followed by 30 and 12 blades.
Description
Keywords
Bráquetes ortodônticos Esmalte dentário Microtomografia computadorizada Exame por imagem Orthodontic brackets Dental enamel Computed microtomography Examination by image