Hatton J F, Pashley D H, Shunk J, Stewart G P
Department of Applied Dental Medicine, Section of Endodontics, Southern Illinois University, School of Dental Medicine, Alton 62002, USA.
J Endod. 1994 Dec;20(12):580-4. doi: 10.1016/S0099-2399(06)80080-4.
Experiments were performed in vitro on extracted human teeth and in vivo on dog teeth to determine the accuracy of a pulse-echo mode with an ultrasonic micrometer in measuring remaining dentin thickness. The accuracy of the ultrasonic micrometer measured remaining dentin thickness was compared with direct caliper measurements in measuring human dentin discs (correlation coefficient, r = 0.99). After modification of the delay line tip (focusing tip), the device was found to be highly accurate on both prepared extracted human teeth (r = 0.87) and in vivo on dog teeth (r = 0.92). The use of ultrasonic technology to measure remaining dentin thickness looks promising. Further research needs to be performed to make the device more clinically useful.
为了确定超声测微计的脉冲回波模式在测量剩余牙本质厚度方面的准确性，在体外对拔除的人牙以及在体内对狗牙进行了实验。将超声测微计测量剩余牙本质厚度的准确性与直接用卡尺测量人牙本质圆盘的结果进行了比较（相关系数，r = 0.99）。在对延迟线尖端（聚焦尖端）进行改进后，发现该设备在制备好的拔除人牙上（r = 0.87）以及在狗牙体内（r = 0.92）都具有很高的准确性。使用超声技术测量剩余牙本质厚度看起来很有前景。需要进行进一步的研究以使该设备在临床上更有用。
