Evaluation of cutting patterns produced with air-abrasion systems using different tip designs.
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Data
2001-05-01
Autores
Santos-Pinto, Lourdes Aparecida Martins dos [UNESP]
Peruchi, C.
Marker, V. A.
Cordeiro, R.
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Resumo
This study assessed cavity preparations produced with different air abrasion tip parameters. Twelve test groups of extracted teeth were prepared to evaluate the parameters of 80 degrees or 45 degrees nozzle angles and 0.38 or 0.48 mm inner tip diameters. All other factors were held constant. A device was made to hold the specimen and air abrasion handpiece that standardized the distance and position relative to the tooth and time of application. The cavities were evaluated by assessing the rounding of the cavosurface margins and cavity floor. Measurements of cavosurface angles and the angle of concavity were made at the deepest portion of the abraded surface using scanning electron micrographs. The cavosurface angles were compared using paired t-test, and the effects of the tip design parameters were analyzed by ANOVA and Duncan's Multiple Range test. From the cavity patterns found in this study, the authors suggest that 80 degrees angle tips are more appropriate than 45 degrees angle tips for making narrow, deep cuts for preventive resin restorations. Conversely, when shallow preparations are needed, as in the case of Class V cavity preparations, cutting patterns of 45 degrees angle tips are more suitable.
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Palavras-chave
adult, analysis of variance, comparative study, dental equipment, dental surgery, human, instrumentation, methodology, molar tooth, nonparametric test, Adult, Air Abrasion, Dental, Analysis of Variance, Dental Cavity Preparation, Dental Instruments, Humans, Molar, Statistics, Nonparametric
Como citar
Operative dentistry, v. 26, n. 3, p. 308-312, 2001.