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首页> 外文期刊>Implant dentistry >Effects of Impression Coping Design, Impression Technique, and Dental Undercuts on the Accuracy of Implant Impressions Assessed by 3-Dimensional Optical Scanning: An In Vitro Study
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Effects of Impression Coping Design, Impression Technique, and Dental Undercuts on the Accuracy of Implant Impressions Assessed by 3-Dimensional Optical Scanning: An In Vitro Study

机译：印模应对设计，印模技术和牙切对3维光学扫描评估的种植体印模精度的影响：一项体外研究

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Introduction: The aim of this in vitro study was to evaluate the effect of the type and design of the impression copings on the accuracy of implant impressions in 2 different conditions. Materials and Methods: A reference model with 2 implants inserted in bilateral mandibular canines was fabricated. The posterior teeth were inserted as tilted to simulate intra-oral undercuts. The teeth were eliminated to create an edentulous condition. Three different impression techniques were performed (open high retentive [OH], open low retentive [OL], closed [C]) for each condition. Total of 48 casts were made. Two scan-bodies were secured on each cast, scanned by an optical scanner. Then, they were compared to the scan of the reference model, and the calculated mean errors were analyzed with a 2-way ANOVA and Tukey test. Results: There was no significant difference between the complete and partially edentulous groups (F = 3.252, P = 0.079). There was significant difference between the different designs of the impression copings (F = 31.789, P < 0.001) but the interaction between the dependent variables was not significant (F = 0.511, P = 0.603). Conclusions: The design of the impression copings was more important than the undercuts. The accuracy of the closed tray coping was greater than the low retentive coping and equal to the high retentive coping.
机译：简介：这项体外研究的目的是评估两种不同条件下印模的类型和设计对植入印模精度的影响。材料和方法：制作了在双侧下颌犬中插入2个植入物的参考模型。倾斜插入后牙，以模拟口内咬合。牙齿被去除以产生无牙的状况。对于每种情况，执行了三种不同的压印技术（高保持力[OH]，低保持力[OL]，封闭[C]）。总共进行了48个演员表。将两个扫描体固定在每个铸件上，并通过光学扫描仪进行扫描。然后，将它们与参考模型的扫描进行比较，并使用2向ANOVA和Tukey检验分析计算出的平均误差。结果：完全和部分缺牙组之间无显着差异（F = 3.252，P = 0.079）。印模应对的不同设计之间存在显着差异（F = 31.789，P <0.001），但是因变量之间的相互作用并不显着（F = 0.511，P = 0.603）。结论：印痕应对的设计比底切更为重要。封闭托盘应对的准确性高于低保持力应对，并等于高保持力应对。

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