Private practice, Prosthodontics, Bellevue, Wash; Affiliate Assistant Professor, Department of Restorative Dentistry, University of Washington School of Dentistry, Seattle, Wash.
Retired engineer, Seattle, Wash.
J Prosthet Dent. 2020 Mar;123(3):403-407. doi: 10.1016/j.prosdent.2019.04.021. Epub 2019 Aug 2.
Abutment screw loosening is still the most common complication reported with implant-supported crowns. One factor that contributes to screw loosening is not achieving the proper torque during the tightening process. Torque application and measurement is usually achieved by using one of the available types of mechanical torque wrench. Of these, the toggle wrench has been shown to produce erroneous readings, and regular testing is recommended. If it is inaccurate, it must be recalibrated or replaced. Calibration typically requires specialized instruments unavailable to most clinicians, so the device must be sent away. This article describes a straightforward, in-office, and inexpensive alternative for testing and recalibrating a toggle torque wrench.
基台螺丝松动仍然是报告中最常见的种植体支持冠并发症。导致螺丝松动的一个因素是在紧固过程中未达到适当的扭矩。扭矩的施加和测量通常通过使用可用的机械扭矩扳手之一来实现。在这些中，已经证明肘节扳手套筒会产生错误的读数，因此建议定期进行测试。如果不准确，则必须重新校准或更换。校准通常需要大多数临床医生都没有的专用仪器，因此必须将设备寄走。本文介绍了一种简单、在办公室内进行且经济实惠的替代方法，用于测试和重新校准肘节扳手套筒扭矩扳手。
