A study of implant/abutment interface with internal anti-rotation configuration

没有证据表明内防旋配置优于外防旋配置。作为阐明内抗旋转构型特征研究的一部分，本研究旨在评价内抗旋转构型的种植体-基台边缘适合性和种植体-基台界面的微间隙。三个内部连接和两个外部六角连接种植体基台组件进行了这项研究。种植体-基台界面（I-A界面）通过三个几何因素进行评价。通过扫描激光显微镜测量边缘配合和微间隙。使用扫描电子显微镜观察I-A界面。平均垂直差异范围为19.8 - 58.1 μm，水平差异范围为-27.1-16.2 μm。本研究中所有I-A界面的微间隙值范围为2.3 μm至5.6 μm。内连接植入物在临床上使用的时间较短，很难说已经进行了足够数量的基础研究和临床评价，因此，人们不得不说缺乏证据支持其使用。因此，要求目前使用内部连接植入物的牙医回答一份调查问卷，以确定用户对内部连接植入物的主观评价。牙医的评估表明，内连接种植体在种植手术方面与外六角种植体一样用户友好，但它们更容易用于口腔修复治疗，因为基台放置很容易。此外，据透露，牙医强烈认为缺乏生物学证据和修复证据来支持使用内部连接种植体。

There is no evidence that the internal anti-rotational configurations are better than the external ones. As a part of a study to clarify the features of internal anti-rotational configurations, this present study was to evaluate the implant-abutment marginal fit and micro gap of implant-abutment interface with the internal anti-rotational configurations. Three internal connection and two external hex connection implant-abutment assemblies were subjected to this study. The implant-abutment interface (I-A interface) was evaluated with three geometrical factors. The marginal fit and micro gap were measured by a scanning laser microscope. The I-A interface was observed using a scanning electron microscope. Mean vertical discrepancies were ranged from 19.8 to 58.1 μm, and horizontal discrepancies were-27.1 to 16.2 μm. The micro gap values of all I-A interface which subjected to this study were ranged from 2.3 μm to 5.6 μm.Internal connection implants have been used clinically for only a short period and it is difficult to say that a sufficient number of fundamental studies and clinical evaluations have been conducted, and as such, one would have to say that there is a lack of evidence to support their use. Therefore, asked dentists who currently use internal connection implants to answer a questionnaire in order to ascertain users' subjective evaluations of internal connection implants. The dentists' assessments indicated that internal connection implants are as user-friendly as external hex implants with respect to implant surgery, but they are easier to use in prosthodontic treatments because abutment placement is easy. In addition, it was revealed that dentists strongly feel that there is a lack of biological evidence and prosthodontic evidence to support the use of internal connection implants.