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The influence of grain size coating and shaft angulation of different diamond tips on dental cutting
Lourdes Santos-Pinto1, Carolina Carvalho Bortoletto, Ana Carolina Mascarenhas Oliveira
1Department of Pediatric Dentistry, Araraquara Dental School, UNESP - Univ Estadual Paulista, Araraquara, SP, Brazil.
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.
