| 摘要 |
A dental crown preparation instrument and method for producing same includes a first body produced by grinding, the first body having a substantially cylindrical shaft and a head connected to the shaft, the first body having outer dimensions being substantially equal to the finished preparation instrument, wherein a basic toothing is at first produced in the head by grinding and a secondary toothing is produced subsequently by grinding, wherein a cutting rate of 15 to 40 m/sec is selected for the grinding process, wherein the grinding wheel is moved with a feed rate of 10 to 50 mm/min and the grinding wheels have diamond particles and have a grain size of 15 to 62 mum, and wherein the toothings have cutting edges featuring a surface roughness of not more than 2.5 mum.
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