不同施加扭矩维持时间对单体种植体支持的固定义齿基牙螺钉脱扭矩值的影响

H. Alotaibi, Sarah Alnamlah, Rana M Almazroa, A. Alfouzan, S. Altaweel, H. Alshehri, N. Labban
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引用次数: 0

摘要

我们评估了将施加的扭矩保持一分钟对反向扭矩值(RTV)的影响,与立即施加扭矩和10分钟后重新拧紧扭矩相比。使用三种不同的方案(A–C),共使用48颗螺钉来扭转基牙;立即施加扭矩至推荐的35Ncm,施加扭矩至建议的35Ncm2,然后在10分钟后重新拧紧同一螺钉,将桥台螺钉拧紧至推荐的35 Ncm,并将扭矩保持一分钟。在每个表面的三个固定点处测量植入物和上部结构之间的间隙大小。使用SPSS软件对数据进行分析(α=0.05)。1分钟、立即和10分钟的平均RTV分别为32.68±2.04 Ncm、32.5±0.93 Ncm和30.54±0.90 Ncm。RTV在1分钟和10分钟方案中的差异非常显著(P<0.05)。Pearson系数表明RTV与上部结构和植入物界面之间的间隙呈负相关(r=-0.43,P<0.01)。当拧紧植入物支撑的单冠的基牙螺钉时,保持施加的扭矩1分钟已被证明是有效的。此外,上部结构和植入物之间的较大间隙值会反向影响RTV,迫使临床医生谨慎使用间隙尽可能小的良好配合的上部结构。
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Effect of Different Applied Torque Maintenance Times on Detorque Values of Abutment Screws in Single Implant-Supported Fixed Prostheses
We evaluated the effect of maintaining the applied torque for one minute on the reverse torque value (RTV) as compared to immediate torque application and retorquing after 10 minutes. A total of 48 screws were used to torque the abutment utilizing three different protocols (A–C); immediate torque application to the recommended 35 Ncm, torque applied to the recommended 35 Ncm, followed by retorquing of the same screw after 10 minutes and abutment screws were torqued to the recommended 35 Ncm, and the torque was held for one minute. The gap size between the implant and supra-structure was measured at three fixed points for each surface. Data were analyzed using SPSS software (α = 0.05). The mean RTV for 1 minute, immediate, and 10 minutes was 32.68±2.04 Ncm, 32.5±0.93 Ncm, and 30.54±0.90 Ncm, respectively. The difference between RTV in the 1-min and 10-min protocols was significant (P <0.05). Pearson’s coefficient demonstrated a negative correlation between RTV and the gap between the supra-structure and the implant interface (r =−0.43, P <0.01). When tightening abutment screws of implant-supported single crowns, holding the applied torque for 1 minute has proven to be efficient. Furthermore, larger gap values between the supra-structure and the implant inversely affect RTV, forcing the clinician to take caution to have a well-fitted supra-structure with as minimal a gap as possible.
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