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KMID : 0362420110490010001
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Journal of Korean Academy of Prosthodontics
2011 Volume.49 No. 1 p.1 ~ p.7
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An experimental study of cutting efficiency of air-driven diamond burs on human tooth
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Hong Jin-Sun
Yeo In-Sung
Kim Sung-Hun
Lee Jai-Bong
Han Jung-Suk
Yang Jae-Ho
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Abstract
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PURPOSE: The purpose of this study was to investigate the cutting efficiency of coarse grit diamond burs with air-turbine handpiece on natural tooth.
MATERIALS AND METHODS: Four groups of coarse grit diamond bur were selected: Komet (A), Shofu (B), Premier (C), and Mani (D). The extracted maxillary central incisors were used, and ten cuts were made on each specimen, using the rotary diamond burs. The surface of each bur was measured at the upper, middle, and bottom of the bur with confocal laser scanning microscope and imaged with SEM. The data were analyzed with one-way ANOVA and t-test at the significance level of 0.05.
RESULTS: The surface roughness was measured. At the A diamond bur, the Sa values were 52.93 μm, 48.32 μm, 46.79 μm, 45.06 μm, and 43.43 μm for control, test 1, 2, 3, and 4 respectively. The Sa values were 50.68 μm, 45.62 μm, 44.41 μm, 44.10 μm, and 42.46 μm for B diamond bur, 58.02 μm, 55.53 μm, 52.22 μm, 48.26 μm, and 45.36 μm for C diamond bur, and 50.11 μm, 46.73 μm, 45.46 μm, 42.58 μm, and 41.80 μm for D diamond bur. Surface roughness after each bur use showed significant changes, but no significant difference was found in surface roughness change between bur systems.
CONCLUSION: Surface roughness in the same bur system showed significant differences after each tooth preparation. However no statistically significant differences were found in surface roughness between bur systems. The SEM images between control and test 4 showed the abraded particles.
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KEYWORD
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Diamond bur, Cutting efficiency, Confocal laser scanning microscope, SEM
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