Masaaki Ohwa

[Adaptability of post core constructed by die-investing technique. Comparison in adaptability with post core constructed by die-pattern technique].

A comparative study was made on the adaptability of the post core made by the dieinvesting technique and that of the post core made by the die-pattern technique. As a results, the following conclusions were obtained.1. Vertical adaptability: As for the rising of the post at the apical portion, the die-pattern technique was found to cause a bigger rise. In other words, the length of the post tended to shorten when die-pattern technique was used. On the other hand, as for the rising of the post at the root-surface portion, no significant difference was noted between the two techniques.2. Horizontal adaptability: As for the gap between the post and the wall at the apical portions, the die-pattern technique tended to enlarge the gap. On the other hand, as for the gap between the post and the wall at the root-surface portion, no significant difference was noted between techniques.