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首页> 外文期刊>Brazilian Dental Journal >Effect of retorque on loosening torque of prosthetic screws under two levels of fit of implant-supported dentures
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Effect of retorque on loosening torque of prosthetic screws under two levels of fit of implant-supported dentures

机译：在种植体支持的假牙两个配合水平下，扭矩对假体螺钉松动扭矩的影响

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This study evaluated the influence of retorque on loosening torque (Lt) of prosthetic screws in implant-supported dentures with different fit levels. Ten mandibular implant-supported dentures were fabricated and then 20 cast models were then prepared using prosthetic structures to create 2 fit levels: passive fit (Pf) and misfit (Mf). Two tightening techniques were also evaluated: initial torque only (T1); and initial torque and retorque after 10 min (T2). Gold or titanium screws were used, resulting in 4 groups to each one: Pf/T1, Pf/T2, Mf/T1, Mf/T2. The Lt was measured 24 h after the tightening torque using digital torque meter. Data were analyzed statistically by two-way ANOVA and Tukey's test (α=0.05), separately for each screw material. For titanium screws, no significant difference (p>0.05) was found between Pf/T1 and Pf/T2, or between Pf/T2 and Mf/T2. However, statistically significant difference (p
机译：这项研究评估了扭矩对不同适合水平的种植体支撑义齿中修复螺钉松动扭矩（Lt）的影响。制作了10个下颌植入物支持的假牙，然后使用假体结构创建20个铸造模型，以创建2个拟合级别：被动拟合（Pf）和错配（Mf）。还评估了两种拧紧技术：仅初始扭矩（T1）; 10分钟（T2）后的初始扭矩和扭矩。使用金或钛螺钉，每组分为4组：Pf / T1，Pf / T2，Mf / T1，Mf / T2。在拧紧扭矩后24小时使用数字扭矩仪测量Lt。通过双向方差分析和Tukey检验（α= 0.05）对每种螺钉材料分别进行统计分析。对于钛螺钉，在Pf / T1和Pf / T2之间或在Pf / T2和Mf / T2之间没有发现显着差异（p> 0.05）。但是，统计上的显着差异（p

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