The Effect of Aging on the Accuracy of New Friction-Style Mechanical Torque Limiting Devices for Dental Implants
نویسندگان
چکیده
OBJECTIVE High variability in delivering the target torque is reported for friction-style mechanical torque limiting devices (F-S MTLDs). The effect of aging (number of use) on the accuracy of these devices is not clear. The purpose of this study was to assess the effect of aging on the accuracy (±10% of the target torque) of F-S MTLDs. MATERIALS AND METHODS Fifteen new F-S MTLDs and their appropriate drivers from three different implant manufacturers (Astra Tech, Biohorizon and Dr Idhe), five for each type, were selected. The procedure of peak torque measurement was performed in ten sequences before and after aging. In each sequence, ten repetitions of peak torque values were registered for the aging procedure. To measure the output of each device, a Tohnichi torque gauge was used. RESULTS Before aging, peak torque measurements of all the devices tested in this study falled within 10% of their preset target values. After aging, a significant difference was seen between raw error values of three groups of MTLDs (P<0.05). More than 50% of all peak torque measurements demonstrated more than 10% difference from their torque values after aging. CONCLUSION Within the limitation of this study, aging as an independent factor affects the accuracy of F-S MTLDs. Astra Tech MTLDs presented the most consistent torque output for 25 Ncm target torque.
منابع مشابه
The effect of sterilization and number of use on the accuracy of friction-style mechanical torque limiting devices for dental implants
BACKGROUND Mechanical torque limiting devices (MTLDs) are necessary tools to control a peak torque and achieving target values of screw component of dental implants. Due to probable effect of autoclaving and number of use on the accuracy of these devices, this study aimed to evaluate the effect of sterilization and number of use on the accuracy of friction-style mechanical torque limiting devic...
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Objective: Recently, a wide variation has been reported in delivery of the target torque by spring-style mechanical torque limiting devices (MTLDs) but the effect of aging on their accuracy has not been independently evaluated. The purpose of this study was to determine the effect of aging on the accuracy of spring-style MTLDs. Methods: In this in-vitro experimental study, 15 new spring-style M...
متن کاملAccuracy of mechanical torque-limiting devices for dental implants after clinical service.
STATEMENT OF PROBLEM Limited information is available regarding the accuracy of mechanical torque-limiting devices (MTLDs) after their clinical use. PURPOSE The purpose of this study was to determine the accuracy of 2 types of MTLDs (friction-style and spring-style) after clinical use. MATERIAL AND METHODS Twenty-seven MTLDs in clinical service at The Ohio State University College of Dentis...
متن کاملEvaluation of the Accuracy and Related Factors of the Mechanical Torque-Limiting Device for Dental Implants
OBJECTIVE Accurate delivery of torque to implant screws is critical to generate ideal preload in the screw joint and to offer protection against screw loosening. Mechanical torque-limiting devices (MTLDs) are available for this reason. In this study, the accuracy of one type of friction-style and two types of spring-style MTLDs at baseline, following fatigue conditions and sterilization process...
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Objectives Dental instruments may serve as a route of infection transmission. The necessity of dismantling of Friction-Style (FS) and SpringStyle (SS) mechanical torque limiting devices (MTLDs) prior to disinfection and sterilization is a matter of debate, aside fromthe fact that it is difcult and time-consuming. This study sought to assess the effect of dismantling of components on quality of ...
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