Cehreli Murat C, Akça Kivang, Tönük Ergin
Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
Int J Oral Maxillofac Implants. 2004 Sep-Oct;19(5):743-8.
The objective of this study was to compare torques applied by new and used manual torque devices for Morse-taper implants.
Fifteen ITI manual torque devices were tested. Those in group 1 (n = 5) were new (ie, never used), those in group 2 (n = 5) had been used 50 to 200 times, and those in group 3 (n = 5) had been used 500 to 1,000 times. The torques applied by each device were measured for 35 Ncm and 15 Ncm targets in an experimental setup by a custom-made wrench with strain gauges connected to a data acquisition system. The strain-gauge signals were simultaneously delivered to a computer at a sample rate of 10,000 Hz and converted to torque units.
New devices applied higher torques than used devices for the 35-Ncm torque target (P < .05). The torques applied by group 3 devices were approximately 1.5 Ncm lower than those of other groups for the 35-Ncm target and approximately 1 Ncm lower for the 15-Ncm target.
ITI manual torque devices deliver consistent torque output, although a slight decrease occurs as a consequence of clinical use.
本研究的目的是比较新型和使用过的用于莫氏锥度种植体的手动扭矩装置所施加的扭矩。
测试了15个ITI手动扭矩装置。第1组（n = 5）的装置是新的（即从未使用过），第2组（n = 5）的装置已使用50至200次，第3组（n = 5）的装置已使用500至1000次。在实验装置中，通过连接到数据采集系统的带有应变片的定制扳手，测量每个装置针对35 Ncm和15 Ncm目标施加的扭矩。应变片信号以10000 Hz的采样率同时传送到计算机并转换为扭矩单位。
对于35 Ncm的扭矩目标，新装置施加的扭矩高于使用过的装置（P <.05）。对于35 Ncm的目标，第3组装置施加的扭矩比其他组低约1.5 Ncm，对于15 Ncm的目标低约1 Ncm。
ITI手动扭矩装置可提供一致的扭矩输出，尽管临床使用会导致扭矩略有下降。
