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지대치 유지장치 설계에 따른 가철성 의치 하부조직에 가해지는 응력에 관한 광탄성학적 연구

Other Titles
 (A) study of photoelastic stress patterns produced by abutment retainer designs fot tooth-supported dentures 
Authors
 한동후 
Issue Date
1986
Description
치의학과/박사
Abstract
[한글]

소수의 치아만이 잔존해있는 경우 잔존치아와 지지조직의 건강을 유지하고 기능적으로 유리한보철물을 제작하기 위해서 지대치의 유지장치 설계에 다양한 의견과 논란이 계속되어 왔다.

저자는 하악 좌우 견치만 잔존된 경우, 11가지의 서로 다른 유지장치를 설계하여 지대치 주위조직 및 잔존치조제로의 응력 분포 및 정도를 광탄성학적으로 관찰하여 다음과 같은 결론을 얻었다.

1. Short coping을 설계한 경우, 지대치로의 응력 집중이 가장 적었고 long coping을 설계한 경우 가장 컸다.

2. Rest를 설치하지 않은 wrought-wire clasp를 설계했을 때, 후방 잔존치조제로의 응력분산 효과를 얻을 수 있었으나 지대치에 torquing force가 컸다.

3. Bona-ball anchor attachment를 설계시 응력분포 및 크기는 bar type attachment의 경우와 차이가 거의 없었다.

4. Bar type attachment중 Hader bar가 지대치에 torquing force를 가장 적게 주었고 Ceka tissue bar가 가장 컸다.

5. 수직 성분의 완압장치를 가진 attachment가 비완압형 attachment보다 지대치 부위에 응력 집중이 적었고, 후방 잔존치조제에 보다 많이 분포되었다.

[영문]

When only a few teeth remained, most teeth ale unacceptable as abutments for conventional restorations. In the selection of an abutment design, the clinician has to choose the one that provides the most equitable distribution of the forces of mastication.

The purpose of this study was to compare the transfer of tories from the dentures to the supporting structures of the abutment teeth and the posterior edentulous ridges by eleven abutment designs for tooth-supported dentures, including short coping, long coping, Bona-ball anchor, bar type attachments and wrought-wire clasp partial denture without rest.

The following conclusions are based on the investigation utilizing photoelastic models to provide more thorough guidelines for abutment design, selection, and potential clinical use:

1. The short coping design produced least stress concentration on the abutment teeth and the long coping design produced most stress concentration.

2. The wrought-wire clasp partial denture without rest appeared to share the forces of occlusion between abutments and the posterior edentulous regions, but produced higher torquing forces on the abutment teeth.

3. The Bona-ball anchor attachment produced similar stress distribution and concentration with the bar type attachments.

4. Of the bar type attachments tested, the Hader bar produced least torquing forces and the Ceka tissue bar produced most torquing forces on the abutment teeth.

5. The vertical resilient type attachments produced less stress concentration to the abutment teeth, and distributed more stress to the posterior regions than the nonresilient type attachments.
Full Text
https://ymlib.yonsei.ac.kr/catalog/search/book-detail/?cid=CAT000000007438
Files in This Item:
제한공개 원문입니다.
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Advanced General Dentistry (통합치의학과) > 3. Dissertation
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/117975
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