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首页> 外文期刊>The International journal of oral & maxillofacial implants >Displacement of Implant Abutments Following Initial and Repeated Torqueing
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Displacement of Implant Abutments Following Initial and Repeated Torqueing

机译：初始和反复扭转后植入物基台的位移

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Purpose: To measure and compare the three-dimensional (3D) position of nine different abutments manufactured by different manufacturers after repeated torqueing on an internal-hexagon implant. Materials and Methods: Nine tapered implants were placed into an acrylic resin block. Five specimens each of nine different abutments (n = 45) were placed into one of nine implants. The abutments were hand-tightened and then torqued to the manufacturer-recommended torque of 30 Ncm. After 10 minutes, 30 Ncm of torque was reapplied. Another 10 minutes elapsed before testing was completed. Images were recorded in 12-second intervals. The spatial relationship of the abutments to the resin block was determined using 3D digital image correlation. Commercial image correlation software was used to analyze the displacements. Mean displacements for the abutments were calculated in three dimensions and overall for both torque applications. Statistical comparisons were done with a t test and a step-down Bonferroni correction. Results: The overall 3D displacement of the Atlantis Titanium abutment after the second applied torque was significantly greater than that of two of the eight other abutments. Displacement in all three dimensions for the Atlantis Titanium abutment changed direction between the first and second torque applications. All abutments moved further in the same direction except for the Atlantis Titanium abutment, which moved back toward its original hand-tightened position horizontally after the second torque application. Conclusion: Re-torqueing of abutments after a 10-minute interval leads to minor displacement of varying degrees between the abutment and a tapered implant. A potential effect of embedment relaxation and/or manufacturing errors should be taken into consideration when selecting an abutment for a cement-retained crown on a tapered implant. Accordingly, clinicians may benefit from adjusting cement-retained implant crowns after re-torqueing the abutments to prevent potential occlusal and interproximal contact problems.
机译：目的：测量并比较不同制造商制造的九种不同基台在重复内六角植入物上的扭矩后的三维（3D）位置。材料和方法：将九个锥形植入物放入丙烯酸树脂块中。将九个不同基台（n = 45）的五个标本分别放入九个种植体之一中。手动拧紧基台，然后将其拧紧至制造商建议的30 Ncm扭矩。 10分钟后，重新施加30 Ncm的扭矩。测试完成前又过了10分钟。每隔12秒记录一次图像。使用3D数字图像相关性确定基台与树脂块的空间关系。使用商业图像相关软件来分析位移。对于两种扭矩应用，基台的平均位移在三个维度上进行了总体计算。采用t检验和逐步Bonferroni校正进行统计比较。结果：第二次施加扭矩后，亚特兰蒂斯钛基台的整体3D位移明显大于其他八个基台中的两个。亚特兰蒂斯钛基台在所有三个尺寸上的位移都改变了第一扭矩施加和第二扭矩施加之间的方向。除Atlantis Titanium钛基台外，所有基台沿相同方向进一步移动，后者在第二次施加扭矩后又水平返回其原始的手动上紧位置。结论：在10分钟的间隔后基台重新扭紧会导致基台和锥形种植体之间发生不同程度的微小位移。为锥形种植体上的水泥固位冠选择基台时，应考虑到嵌入松弛和/或制造误差的潜在影响。因此，在重新扭转基台后，临床医生可能会受益于调整水泥固定的种植体牙冠，以防止潜在的咬合和近端接触问题。

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