Human teeth versus bovine teeth: cutting effectiviness of diamond burs

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Fais, Laiza Maria Grassi [UNESP]
Marcelo, Caroline Canhizares [UNESP]
Guaglianoni, Dalton Geraldo [UNESP]
Pinelli, Lígia Antunes Pereira [UNESP]
Silva, Regina Helena Barbosa Tavares da [UNESP]
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Aim: In this study, a mass-loss method was used to verify whether bovine enamel has the same wear pattern as human enamel in cutting efficiency tests of diamond burs. Methods: Seventy-two teeth were used: 36 human molars (HT) and 36 bovine mandibular central incisors (BT). The enamel of the teeth was cut using diamond bur #1092 attached to a high-speed handpiece under controlled pressure (50-80 g). Each bur (n=12) cut for a total of 72 min, divided into 6 periods of 12 min each (12-min, 24-min, 36-min, 48-min, 60-min, and 72-min). The amount of enamel removed was determined by the difference between pre- and post-cut tooth masses. Results: The mean amounts (g) of enamel removed were: HT- 12-min=0.11; 24-min=0.12; 36-min=0.11; 48-min=0.11; 60-min=0.10; 72-min=0.12; BT- 12-min=0.12; 24-min=0.15; 36-min=0.15; 48- min=0.13; 60-min=0.16; 72-min=0.14. Data were analyzed using ANOVA followed by Tukey’s test, and the results showed statistically significant differences between human and bovine teeth (p<0.001) and among the cutting periods (p<0.001).Conclusions: It was concluded that the cutting efficiency of the burs was different between the tested substrates, and that bovine enamel underwent greater mass loss than did human enamel.
Teeth, Dental enamel, Cattle, Efficiency, Diamond
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Brazilian Journal of Oral Sciences, v. 9, n. 1, p. 39-42, 2010.