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

没有证据表明内部防转构型比外部防转构型更好。作为阐明内防旋结构特征的研究的一部分，本研究旨在评估具有内防旋结构的种植体-基牙界面的边缘适合性和微间隙。三个内六角连接和两个外六角连接种植体-基牙组件接受本研究。对种植体-基牙界面(I-A界面)进行了三个几何参数的评价。用扫描激光显微镜测量边缘适合度和微间隙。用扫描电子显微镜观察I-A界面。平均垂直偏差为19.8~58.1μm，水平偏差为-27.1~16.2μm。所有I-A界面的微间隙范围为2.3μm至5.6μm。内连接植入物在临床上的使用时间很短，很难说已经进行了足够数量的基础研究和临床评估，因此，人们不得不说缺乏证据支持它们的使用。因此，要求目前使用内连接植入物的牙医回答一份问卷，以确定用户对内连接植入物的主观评价。牙医的评估表明，就种植手术而言，内部连接种植体与外部六角种植体一样容易使用，但在口腔修复治疗中更容易使用，因为基牙放置很容易。此外，据透露，牙医强烈感到缺乏生物学证据和修复证据来支持使用内连接种植体。

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.