一、人造冠长度测量卡尺平行的2个工作头一长一短,长头的根部套在短头根部的柄上,并可沿柄上下滑动。因装有小弹簧,又可固定在某一位置。柄上有刻度,便于观察测量的长度。测量上前牙时,长工作头平面抵住基牙切缘,短工作头尖端对准龈缘,记录刻度上的读数。然后同法 First, the artificial crown length measuring caliper parallel to the two work a long one short, the root of the long head set in the stub of the stalk, and can slide along the handle up and down. Because of a small spring, but also fixed in a certain position. Handle a scale, easy to observe the measured length. When measuring the anterior teeth, the long workhead flat against the cutting edge of the abutment, short work tip alignment gingival margin, record the readings on the scale. Then with the law