Semper W, Kraft S, Krüger T, Nelson K
Dept. of Oral and Maxillofacial Surgery, Clinical Navigation and Robotics, Charité-Campus Virchow Clinic, Augusten-burger Platz 1, 13353 Berlin, Germany.
J Dent Res. 2009 Aug;88(8):725-30. doi: 10.1177/0022034509341172.
Rotational freedom of implant positional indices in two-piece implants was investigated. The aim of the study was to determine, analytically, the rotational freedom of three different positional index designs, based on the hypothesis that it is not influenced by their geometric principle. Regular polygonal, polygon profile, and cam-groove patterns were analyzed. Schematic descriptions were made and idealized equations developed. Parameters influencing the extent of rotational freedom were identified for the different positional index designs. A general equation that describes the rotational freedom of differently designed indices was also formulated. The present analysis showed that the rotational freedom of positional indices can be analytically calculated and is influenced by different parameters. The rotational freedom of the positional index of commonly used implant-abutment connections depends on their geometric design and size.
研究了两件式种植体中种植体位置索引的旋转自由度。本研究的目的是基于三种不同位置索引设计不受其几何原理影响的假设，通过分析确定其旋转自由度。分析了正多边形、多边形轮廓和凸轮槽模式。进行了示意图描述并推导了理想化方程。确定了影响不同位置索引设计旋转自由度程度的参数。还制定了一个描述不同设计索引旋转自由度的通用方程。目前的分析表明，位置索引的旋转自由度可以通过分析计算得出，并且受不同参数的影响。常用种植体-基台连接的位置索引的旋转自由度取决于其几何设计和尺寸。
