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

没有证据表明内部抗旋转构型优于外部抗旋转构型。作为阐明内抗旋转构型特征研究的一部分，本研究评估了内抗旋转构型下种植-基牙的边缘配合和种植-基牙界面的微间隙。三个内连接和两个外六角连接种植基台组件进行了这项研究。采用三种几何因子评价种植体-基台界面（I-A界面）。用扫描激光显微镜测量了边缘拟合和微间隙。用扫描电镜观察了I-A界面。平均垂直差异为19.8 ~ 58.1 μm，水平差异为27.1 ~ 16.2 μm。所研究的I-A界面的微间隙值在2.3 ~ 5.6 μm之间。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来支持它们的使用。因此，我们要求目前使用内连接种植体的牙医回答一份问卷，以确定使用者对内连接种植体的主观评价。牙科医生的评估表明，内连接种植体与外六角种植体在种植手术方面一样用户友好，但由于基台放置容易，因此在修复治疗中更容易使用。此外，据透露，牙医强烈认为缺乏生物学证据和修复学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.