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

修复部分齿状口的下颌骨“支撑区”。

基本信息

批准号：
03670923
负责人：
IGARASHI Yoshimasa
金额：
$ 1.34万
依托单位：
Matsumoto Dental College (1993)Showa University (1991-1992)
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03670923/
关键词：
Supporting Zone of the Mandible Intercuspal Occlusal Contacts Occlusal Force Distribution in RPD's Connecting Rigidity Intermaxillary Jaw Registration Free-end Saddle RPD's.支台装置連結強度 8020運動欠損歯列の補綴遊離端義歯即時義歯下顎位の変化咬合支持下顎支持域

项目摘要

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.

在部分有牙的口腔中，通过修复干预来恢复各种下颌位置是我们日常的需求。最基本的下颌位置是牙尖交错位置，由前磨牙和磨牙的四个节段接触组成。这些在牙尖交错位修复中起关键作用的接触点称为下颌骨的“支持区”。本系列研究的目的是为了阐明不同的修复设计和方法对下颌骨支持区的修复效果，在此科学帮助下，我对以下问题进行了分析，并得到了以下结果。(1)自由端RPD下基牙和鞍座的咬合力分布。进行了体内分析。在固定鞍对粘膜的支撑力一定的情况下，固位体的连接刚度对力的分布有一定的影响。连接的刚度越大，鞍座上的力分布就越小。刚性套筒冠固位体的咬合力为20%，柔性锻丝固位体的咬合力为70-80%，咬合力的分布也影响有效恢复下颌骨支持区的咬合接触的准确性。刚性固位体比柔性固位体更能有效地将其固定在鞍形结构中。(2)在颌间配准过程中，应尽可能减小咬合力，使其达到在颌内攻丝时的最小限度。这一点在各种咬合边缘的患者中通过检查咬合方法和专门的咬合架得到了证实。