Murat C Cehreli1, Kivang Akça, Ergin Tönük. 1. Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey. mcehreli@hotmail.com
Abstract
PURPOSE: The objective of this study was to compare torques applied by new and used manual torque devices for Morse-taper implants. MATERIAL AND METHODS: 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. RESULTS: 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. DISCUSSION AND CONCLUSION: ITI manual torque devices deliver consistent torque output, although a slight decrease occurs as a consequence of clinical use.
PURPOSE: The objective of this study was to compare torques applied by new and used manual torque devices for Morse-taper implants. MATERIAL AND METHODS: 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. RESULTS: 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. DISCUSSION AND CONCLUSION: ITI manual torque devices deliver consistent torque output, although a slight decrease occurs as a consequence of clinical use.
Authors: Murat Cavit Cehreli; Murat Akkocaoglu; Ayhan Comert; Ibrahim Tekdemir; Kivanc Akca Journal: Med Biol Eng Comput Date: 2007-03-06 Impact factor: 2.602
Authors: Mehmet Ali Erdem; Burcin Karatasli; Onur Dinçer Kose; Taha Emre Kose; Erhan Çene; Serhan Aydın Aya; Abdulkadir Burak Cankaya Journal: Biomed Res Int Date: 2017-11-07 Impact factor: 3.411