| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a dental cutting bar capable of cutting only a softened dentin part with advanced decay so as not to excessively cut a sound dentin part or having a bad influence on the human body. SOLUTION: The cutting part of this dental cutting bar is formed of a plastic material having a Vickers hardness of HV 20-35. As the plastic material with Vickers hardness of HV 20-35, at least one selected from polyether sulfone, polyamide imide, polyether imide, and polyether ether ketone is preferred. The cutting part is constituted by electrodepositing the plastic material with Vickers hardness of HV 20-35 and a particle size of 30-200μm on the surface of a metal, or molded into a cutting edge shape with the plastic material with Vickers hardness of HV 20-35.</p> |
