Human teeth versus bovine teeth: cutting effectiveness of diamond burs

Laiza Maria Grassi Fais^I; Caroline Canhizares Marcelo^I; Regina Helena Barbosa Tavares da Silva^II; Dalton Geraldo Guaglianoni^III; Lígia Antunes Pereira Pinelli^II

^IMSc, Department of Dental Materials and Prosthodontics, Araraquara Dental School; São Paulo State University, Brazil
^IIPhD, Associate Professor, Department of Dental Materials and Prosthodontics, Araraquara Dental School; São Paulo State University, Brazil
^IIIMSc, Professor of Statistics, Mathematics and Statistics Department, Araraquara Science and Language School, São Paulo State University, Brazil

Correspondence

ABSTRACT

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.

Keywords: teeth; dental enamel; cattle; efficiency, diamond.

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Correspondence to:
Lígia Antunes Pereira Pinelli
Faculdade de Odontologia de Araraquara - UNESP
Rua Humaitá, 1680- 14801-903
Araraquara-SP, Brasil
Phone: +55 16 3301-6413 / Fax: +55 16 3301-6406
E-mail: ligia@foar.unesp.br

Received for publication: November 26, 2009 ]]> Accepted: March 8, 2010