Cutting efficiency of dental burs - A pilot study

Aziz, A.A. and Abu Kasim, N.H. and Mohamd Yusof, M.Y.P. and Paiizi, M. (2008) Cutting efficiency of dental burs - A pilot study. Journal of Dental Research.

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Abstract

Objectives: This study aim to evaluate the cutting efficiency of tungsten carbide burs (TC) and rotary diamond instruments by measuring their rake angle and visual examination of their cutting surfaces respectively, using scanning electron microscopy (SEM). Materials and Method: 60 short and long head pear-shaped TC and 18 round rotary diamond instruments that had been used to prepare < than 5, > than 5 and > than 10 cavities were selected from the 3rd & 4th year dental students, Dental Faculty, University of Malaya. 12 cylindrical and flame rotary diamond instruments were also selected from the 5th year students. The rake angle of TC was measured and surfaces of diamond instruments were evaluated using Field Emission Scanning Electron Microscope (FESEM). Each test group comprised of 10 samples and new burs constituted the control group. The data were analysed descriptively and statistically using Two-way ANOVA, SPSS version 12. Results: The rake angles of control, < than 5 and > than 5 groups were significantly higher compared to > than 10 groups, p< .05. Rotary diamond instruments used to prepare < than 5 cavities showed intact diamond particles with distinct cutting facets comparable to control group. Instruments used to prepare > than 10 teeth showed blunt and dislodged diamond particles. Conclusions: The rake angle of TC is significantly lower and diamond instruments showed blunt diamond particles after cutting > than 10 preparations.

Item Type: Article
Additional Information: Associate Prof. Dr. Noor Hayaty Binti Abu Kasim Department of Conservative Dentistry, Faculty of Dentistry, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Cutting; Efficiency; Dental Burs; Self-Repair; Culture-Conditions; Composite Resin; Dental Pulp Stem Cell; Functionally Graded Design; Multi Layered Post; Functionally Graded Dental Post; Soft Skills; Clinical Pairing; Dental Pulp Stromal Cells; Long-Term Expansion
Subjects: R Medicine
R Medicine > RK Dentistry
Divisions: Faculty of Dentistry > Dept of Conservative Dentistry
Depositing User: Associate Prof. Dr. Noor Hayaty Abu Kasim
Date Deposited: 09 Feb 2012 07:59
Last Modified: 23 Sep 2013 01:52
URI: http://eprints.um.edu.my/id/eprint/2584

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