Abstract
This paper presented the new device of external pin fixation method and appraisal of its clinical use. This new apparatus consisted of three parts of two different types of pin system, namely, HH (the initial of Hajime Hayashi) type pin system, HY (the initial of Hiroyuki Yamanaka) type pin system and the kirschner wire (diameter 3.0 mm). This combined fixation system was developed based on rigidity of pin, flexibility of klemme and easy adaptation of length of wire rod.
It was applied to six cases of iliac bone grafting and five cases of maxillo-facial bone fracture, to which it may have been thought that ordinary fixation were not enough to get the stability of grafted or fractured bone. This worked very well in all cases, except in one case of iliac bone grafting because of its poor bed condition.
Thus, clinical results showed this new type of external fixation system (we call it “Mei-dai system”) was much more useful and easier to get rigid fixation than other pin systems (ex. HH type alone, HY type alone, Roger-Anderson type etc.).
