Quantitative assessment of the enamel machinability in tooth preparation with dental diamond burs

Song, Xiao-Fei, Jin, Chen-Xin, and Yin, Ling (2015) Quantitative assessment of the enamel machinability in tooth preparation with dental diamond burs. Journal of The Mechanical Behavior of Biomedical Materials, 41. pp. 1-12.

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Abstract

Enamel cutting using dental handpieces is a critical process in tooth preparation for dental restorations and treatment but the machinability of enamel is poorly understood. This paper reports on the first quantitative assessment of the enamel machinability using computer-assisted numerical control, high-speed data acquisition, and force sensing systems. The enamel machinability in terms of cutting forces, force ratio, cutting torque, cutting speed and specific cutting energy were characterized in relation to enamel surface orientation, specific material removal rate and diamond bur grit size. The results show that enamel surface orientation, specific material removal rate and diamond bur grit size critically affected the enamel cutting capability. Cutting buccal/lingual surfaces resulted in significantly higher tangential and normal forces, torques and specific energy (p<0.05) but lower cutting speeds than occlusal surfaces (p<0.05). Increasing material removal rate for high cutting efficiencies using coarse burs yielded remarkable rises in cutting forces and torque (p<0.05) but significant reductions in cutting speed and specific cutting energy (p<0.05). In particular, great variations in cutting forces, torques and specific energy were observed at the specific material removal rate of 3 mm^3/min/mm using coarse burs, indicating the cutting limit. This work provides fundamental data and the scientific understanding of the enamel machinability for clinical dental practice.

Item ID: 37898
Item Type: Article (Research - C1)
ISSN: 1751-6161
Keywords: cutting force, cutting energy, cutting torque, enamel, machinability
Funders: National Natural Science Foundation of China (NSFC)
Projects and Grants: NSFC Project Grant No. 51375335
Date Deposited: 17 Mar 2015 15:56
FoR Codes: 09 ENGINEERING > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified @ 100%
SEO Codes: 92 HEALTH > 9204 Public Health (excl. Specific Population Health) > 920402 Dental Health @ 100%
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