Knight J S, Smith H B
Medical University of South Carolina, College of Dental Medicine, Division of Operative Dentistry, Charleston 29425-2605, USA.
Oper Dent. 1998 Nov-Dec;23(6):299-302.
When self-threading pins are used in the restoration of teeth, the heat generated by cutting these pins to the correct length may traumatize the pulp. This study evaluated cotton forceps and a mosquito hemostat used as a heat sink and at different positions on the pin to determine any change in heat transferred to the tooth. Three hundred self-threading pins (Whaledent TMS System: 100 each of the Regular, Minim, and Minikin sizes) were inserted into freshly extracted teeth and sectioned. The temperature change at the apical end of the pin was measured using a thermistor probe. The results indicated that metal supporting instruments can be effective in reducing heat transferred to the apical aspect of the pin during pin reduction.
当使用自攻丝钉修复牙齿时，将这些钉切割至正确长度所产生的热量可能会损伤牙髓。本研究评估了用作散热器的棉钳和蚊式止血钳，以及它们在钉上不同位置的使用情况，以确定传递到牙齿的热量是否有任何变化。将300颗自攻丝钉（Whaledent TMS系统：常规、微型和超微型尺寸各100颗）插入新鲜拔除的牙齿中并进行切片。使用热敏电阻探头测量钉顶端的温度变化。结果表明，在缩短钉的过程中，金属支撑器械可有效减少传递到钉根尖部位的热量。
