The influence of grain size coating and shaft angulation of different diamond tips on dental cutting

• Autor(a) principal: Santos-Pinto, Lourdes Aparecida Martins dos [UNESP]
• Data de Publicação: 2011
• Outros Autores: Bortoletto, Carolina Carvalho [UNESP], Oliveira, Ana Carolina Mascarenhas [UNESP], Santos-Pinto, Ary [UNESP], Zuanon, Angela Cristina Cilense [UNESP], Lima, Luciana Monti [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.4103/0972-0707.82611; http://hdl.handle.net/11449/72364
• topic: Cavity preparation; chemical vapor deposition; cutting instruments; ultrasound

Objectives: To evaluate the influence of the grain size coating and shaft angulation of ultrasonic and high-speed diamond burs on the dental cutting effectiveness. Materials and Methods: For the grain size evaluation, cavities were prepared on 40 incisors using high-speed (1092 and 1093F KG Sorensen®) and ultrasonic tips (8.2142 and 6.2142-CVDentus®). For the shaft angulation evaluation, cavities were prepared on 40 incisors using uniangulated (T1-CVDentus®) and biangulated (T1-A CVDentus®) ultrasonic tips. The cavities were bisected and examined at 50 magnification. The width and depth of cavities were measured by Leica QWin software. Kruskal-Wallis non-parametric test was used for analysis. Results: The grain size did not affect the cutting effectiveness, but the high-speed burs promoted deeper and wider cavities than the ultrasonic tips. The shaft angulation did not affect the cutting effectiveness; both the angulated and biangulated tips had greater cutting efficiency in dentin than in enamel. Conclusions: Ultrasonic tips promoted more conservative preparations and seemed promising for cavity preparation.