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KMID : 0362219720060010003
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Journal of The Korean Research Society for Dental Materials
1972 Volume.6 No. 1 p.3 ~ p.7
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Experimental Study on Roughness of Cut Surface in Human Teeth
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嚴正文/Um, Chung Moon
金英海/宋英鎬/鮮于良國/Kim, Yung Hai/Song, Young Ho/Sunoo, Young Gook
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Abstract
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The purpose of this study was to measure the roughness on the cut surface with various kinds of cutting tolls. ´
Three kinds of disks, two kinds of diamond points and four kinds of tungsten carbide burs were used to cut the tooth.
Newly, extracted anterial teeth and premolars were held with impression compound on one side of simple lever balance, high speed contra angle handpiece or handpiece which clamped to stand was touched on labial surface of anterial teeth, and a load of 56g was applied on another side of balance, and balance was set horizontally by controlling clamp of stand. (Fig. -4)
After tooth was cut, the prepared specimens were washed by water and dried by air.`Surface Roughness Tester, Surftest-B (Fpig. -5) was used to measure roughness of the cut surface.´. Surfcorder Charts (Fig. -6, 7, 8, 9,10,11) were produced by tracing at 90 degrees to the direction of cut.
The following results were obtined from this experiments
1. Silicon Carbide Disk produced the smoothest surface (3,a).
2. Taper Cylinder Diamond Point (0.065 by 0.038inch) and Cylinder Point (0.050 by 0.1651nch) produced the roughest surface (15-16,a).
3. Tungsten Carbide No. 170L produced the smoothest surface (3.5p) in Tungsten Carbides.
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