Kremers L, Lampert F
Dtsch Zahnarztl Z. 1977 Nov;32(11):905-7.
The forameter is an instrument used for measuring the length of the root canal. Here the use of the principle of resistance measurement is refined. The position of the apical foramen is shown acoustically as well as visually. This investigation gives positive results for the measurements in the treatment of devitalised teeth. The inaccuracy of measurement in living teeth appears too great.
根管长度测量仪是一种用于测量根管长度的器械。在此，电阻测量原理的应用得到了改进。根尖孔的位置通过声学和视觉方式显示出来。这项研究在死髓牙治疗的测量中取得了积极结果。活髓牙测量的不准确性似乎太大了。
