Diaz Pedro, Vizoso Beatriz, Lopez-Suarez Carlos, Gonzalo Esther, Mosaddad Seyed Ali, Suarez Maria J
Department of Conservative Dentistry and Bucofacial Prostheses, Faculty of Odontology, Complutense University of Madrid, Madrid, Spain.
Department of Research Analytics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India.
Clin Oral Investig. 2025 Jan 22;29(1):72. doi: 10.1007/s00784-024-06093-4.
This study aimed to assess the vertical misfit at the implant-abutment interface in external and internal connections across various implant brands, comparing original milled titanium abutments with laser-sintered cobalt-chromium (Co-Cr) abutments.
A total of 160 implants from four different brands were utilized, with 80 featuring external connections (EC) and 80 internal connections (IC). Original milled titanium abutments (n = 160) and Co-Cr laser-sintered abutments (n = 160) were randomly attached to each connection type, following the manufacturer's recommended torque. After undergoing thermal cycling, the vertical misfit was measured using a scanning electron microscope. Statistical analyses were performed using the Kruskal-Wallis and Mann-Whitney U tests. The significance level was set at α = 0.05.
The original milled titanium abutments exhibited the lowest misfit values. Significant differences were identified between both abutment types for EC (d = 109.578 μm; p = 0.0001) and IC (d = 44.317 μm; p = 0.002). The EC with laser-sintered abutments demonstrated the highest marginal misfit values, with an average of nearly 30 μm, while a misfit value of 11.382 μm was achieved in the IC. Differences were observed among the brands for milled abutments in both EC and IC. Similarly, variations were also noted for the laser-sintered Co-Cr abutments in EC and IC configurations.
The vertical misfit of the original milled titanium abutments in all groups was within the clinically acceptable range for IC. The connection type significantly impacted the vertical misfit in laser-sintered Co-Cr abutments. Differences among the implant systems were observed for both connection types and abutment types evaluated.
Using original milled titanium abutments, particularly in internal connection systems, can lead to better fit and stability at the implant-abutment interface, potentially reducing the risk of mechanical complications and improving long-term implant success.
本研究旨在评估不同种植体品牌的外连接和内连接中种植体-基台界面的垂直不匹配情况，比较原始铣削钛基台与激光烧结钴铬（Co-Cr）基台。
共使用了来自四个不同品牌的160颗种植体，其中80颗为外连接（EC），80颗为内连接（IC）。按照制造商推荐的扭矩，将原始铣削钛基台（n = 160）和Co-Cr激光烧结基台（n = 160）随机连接到每种连接类型上。经过热循环后，使用扫描电子显微镜测量垂直不匹配情况。采用Kruskal-Wallis和Mann-Whitney U检验进行统计分析。显著性水平设定为α = 0.05。
原始铣削钛基台的不匹配值最低。在EC（d = 109.578μm；p = 0.0001）和IC（d = 44.317μm；p = 0.002）中，两种基台类型之间均存在显著差异。激光烧结基台的EC显示出最高的边缘不匹配值，平均接近30μm，而IC的不匹配值为11.382μm。在EC和IC中，不同品牌的铣削基台之间存在差异。同样，在EC和IC配置中，激光烧结Co-Cr基台也存在差异。
所有组中原始铣削钛基台的垂直不匹配在IC的临床可接受范围内。连接类型对激光烧结Co-Cr基台的垂直不匹配有显著影响。在所评估的连接类型和基台类型中，均观察到种植体系统之间的差异。
使用原始铣削钛基台，特别是在内连接系统中，可在种植体-基台界面实现更好的适配和稳定性，可能降低机械并发症的风险并提高种植体的长期成功率。
