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Restoration of the 'Supporting Zone' of the Mandible in Partially Dentate Mouth

部分齿状口下颌骨“支撑区”的修复

基本信息

批准号：
62570881
负责人：
IGARASHI Yoshimasa
金额：
$ 1.41万
依托单位：
Showa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1989
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62570881/
关键词：
Partially Dentate Mouth Supporting Zone of the Mandible Design of the free-end Saddle R.P.D.'s Impression Procedure Retainers of R.P.D.'s R.P.P.I. retainer Alignment of the Artificial Teeth Reducing the Occlusal Force Konus Krono 改良したR.P

项目摘要

It is our daily requirement to restore the various mandibular position by the prosthodontic intervention in the partially dentate mouth. The most basic mandibular position is the intercuspal position, composed by the four segmental contacts in both presolar and molar teeth. These Key contacts in restoring the intercuspal mandibular position is called as "the Supporting Zone" of the mandible.The purpose of these series of study is to clarify how effective the supporting zone of the mandible will be restored by the various prosthetic designs and procedures.In the term of this scientific aid, we have analyzed the following problems and have gotten the following results.The Problems were;(1)how the various retainers would restore the mandibular position in the free-end R.P.D.'s,(2)how the various methods of impression procedures of the free-end R.P.D.'s would affect the supporting ability of the dentures,(3)how the preprosthetic treatments on the abutment restorations would affect the supporting ability of the dentures and (4)how the arrangement of the artificial teeth would affect the supporting ability of the dentures.The results obtained were;(1)The more the retainer had the rigidity, that meant the good support and well designed bracing action, the more effective the supporting ability of the dentures,(2)The mucocompressive impression technique was more effective in restoring the support of the free-end saddles than any other methods,(3)The genuine mesio-distal parallerism in the abutment crowns and the R.P.I. retainers were effective in restoring the support of the free- end dentures,(4)In the free-end saddle, it was advisable not to align the second molar tooth, in case the antagonists did not exist, or the antagonists were also the free end saddle for the reason of reducing the force to the bounded abutments and saddles.

在部分有牙颌的口腔中，通过修复干预来恢复下颌骨的各种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，由前臼齿和臼齿中的四个节段接触组成。这些牙尖交错位修复中的关键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手术方法对下颌骨支持区的修复效果。在此科学帮助下，我们分析了以下问题，并得到了以下结果：（1）不同固位体在游离端R.P.D.（2）自由端R.P.D.（3）基牙前处理对义齿支持能力的影响;（4）人工牙排列方式对义齿支持能力的影响。（1）固位体的刚度越大，即固位体的支撑力越好，设计良好的支抗作用，义齿的支撑能力越有效，（2）在恢复游离端鞍支持方面，粘膜加压印模技术优于其他印模技术。（4）在游离端鞍座中，如果没有对抗牙，或对抗牙也是游离端鞍座，为了减少对结合基牙和鞍座的作用力，建议不要对齐第二磨牙。