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Instrument for measuring perimeter of tooth - has fine wire fixed to stud on rigid shaft passing round tooth to spool mounted in sleeve
Instrument for measuring perimeter of tooth - has fine wire fixed to stud on rigid shaft passing round tooth to spool mounted in sleeve
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机译:齿距测量仪-细线固定在刚性轴上的螺柱上,将圆齿传递到安装在套筒中的线轴上
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摘要
The densimeter measures the perimeter of a tooth for fitting an artificial crown. The instrument has a main shaft with a length of fine wire passing alone one side. The wire is fixed at one end to a stud (3) and passes over a pair of aperture shoulders (5, 6) along the shaft to a spool of wire wound on a bobbin. The bobbin is seated in a rigid sleeve at one end of the shaft. The tooth is measured by forming a tight loop of wire round the perimeter then measuring the length of wire used.
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