Department of Prosthodontics, Faculty of Dental Science, Dharmsinh Desai University, Nadiad.
J Oral Implantol. 2021 Dec 1;47(6):447-454. doi: 10.1563/aaid-joi-D-19-00246.
The purpose of this study was to evaluate the accuracy of open tray dental implant impressions when the implants are placed with varying implant angulations and depths. Four partially edentulous models were fabricated using photopolymer resin, each having different angulation and depth of the implant analogs. A total of 40 open tray elastomeric impressions were made, which were poured in type IV die stone (n = 10). These casts were evaluated and compared for accurate reproduction of the spatial orientation of the implant analogs in the models using digitization in 3 dimensions. The results were analyzed using the independent T test. Statistically significant differences were observed when the casts were compared with their respective master models. These casts had the implant replicas placed deeper within the replicated soft tissue. Making accurate impressions in partially edentulous situations with dental implants placed with varying depth and angulation is critical and clinically demanding. There is a need for future in vivo research to identify methods and materials, exploring digital impression techniques as well, in order to make precise impressions.
本研究旨在评估在不同种植体角度和深度下使用开口托盘进行种植体印模的准确性。使用光聚合树脂制作了四个部分缺牙模型，每个模型的种植体模拟体具有不同的角度和深度。共制作了 40 个开口托盘弹性印模，其中 10 个用 IV 型模具石进行了浇铸（n=10）。使用三维数字化技术对这些模型进行评估和比较，以准确复制模型中种植体模拟体的空间方向。结果使用独立 T 检验进行分析。当将模型与相应的主模型进行比较时，观察到了统计学上的显著差异。这些模型中的种植体复制品被放置在复制的软组织内更深的位置。在部分缺牙情况下，使用不同深度和角度放置的种植体进行准确的印模至关重要，且具有临床挑战性。需要进行未来的体内研究，以确定方法和材料，探索数字化印模技术，从而实现精确的印模。
