Restroration of the "Supporting Zone" of the Mandible in partially Dentate Mouth.

在部分有齿口腔中，通过修复干预来恢复下颌的各种位置是我们日常所需要的。下颌最基本的位置是尖间位置，由前磨牙和磨牙的四个节段接触组成。这些恢复下颌尖间位置的关键接触被称为下颌的“支撑区”。这一系列研究的目的是阐明如何有效地恢复下颌骨的支持区，将通过各种假体的设计和程序。在这次科学援助期间，我分析了以下问题，得到了以下结果。(1)自由端RPD下基台与鞍座间的咬合力分布。在体内进行分析。当有界鞍座的粘膜支撑一定时，所选择的固位器的连接刚度会影响力的分布。连接越刚性，鞍座上的力分布越小。刚性望远镜固位器的咬合力为20%，而柔性锻丝固位器的咬合力为70-80%。咬合接触的准确性和咬合力的分布一样，对恢复下颌骨支撑区的效果也有影响。使用刚性固位器比使用柔性固位器更能有效地修复鞍座。(2)在上颌间配准过程中，应尽量减少咬合力，使其达到下颌轻叩的程度。通过检查咬合方法和专门的关节器，在不同咬合边缘的患者中证实了这一点。

It is our daily requirement to restore the various madibular position by the prosthodontic intervention in the partially dentate mouth. The most basic madibular position is the intercuspal position, composed by the four segmental contacts in both premolar and molar teeth. These Key contacts in restoring the intercuspal mandibular position is called as "the Supporting Zone" of the mandible. The surpose of these series of study is to clarify how effective the supporting zone of the mandible will be restored by various prosthetic designs and procedures.In the term of this scientific aid, I have analyzed the following problems and have gotten the following results.(1) Occlusal force distribution both to the abutments and to the saddle under free-end RPD's. were analyzed in vivo. The force distribution was affected by connecting rigidity of the retainers selected if the mucosal support by the bounded saddle was constant. The more rigid the connection, the less the force distribution on the saddle was obtained. Occlusal force was 20% in rigid telescope retainers, while it was 70-80% in flexible wrought wire retainers.The accuracy of occlusal contacts effective in restoring the supporting zone of the mandible was also affected jst as occlusal force distribution. It was more effectively restored in the saddle with rigid retainers than with the flexible ones.(2) Occluding force should be minimized to the extent in tapping of jaws, in the procedure of intermaxillary jaw registration. This was verified in patients with various occlusal rims by check bite methods and the specialized articulators.