1995 Fiscal Year Final Research Report Summary
A STUDY OF OCCLUSAL CONTACT ON SUPERSTRUCTURES OF IMPLANT AND NATURAL TEETH
| Project/Area Number |
06671958
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
補綴理工系歯学
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
KOYANO Kiyoshi KYUSHU UNIVERSITY,DENTISTRY,ASSOCIATE PROFESSOR, 歯学部, 講師 (50195872)
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| Co-Investigator(Kenkyū-buntansha) |
TSUKIYAMA Miwa KYUSHU UNIVERSITY,DENTISTRY,RESEARCH ASSOCIATE, 歯学部, 助手 (30253462)
OGAWA Takahiro KYUSHU UNIVERSITY,DENTISTRY,RESEARCH ASSOCIATE, 歯学部, 助手 (80274471)
SUETSUGU Tsuneo KYUSHU UNIVERSITY,DENTISTRY,PROFESSOR, 歯学部, 教授 (60013992)
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| Project Period (FY) |
1994 – 1995
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| Keywords | IMPLANT / OCCLUSAL FORCE / MASSETER MUSCLE / ELECTROMYOGRAPH / DENTAL PRESCALE |
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| Research Abstract |
The purpose of this study was to investigate the occlusal contacts and force in superstructures supported by implant and natural teeth under loading condition. The testing group consisted of 20 partially edentulous patient who had been treated with fixed partial prostheses supported by implants. Surface EMG activity was recorded from bilateral masseter muscles activity at maximum clenching, and the activity was defined as 100% maximum voluntary contraction (MVC). Occlusal contacts and force were measured by dental prescale at 25%, 50%, 75%, 100%MVC.Each clenching level was performed with visual feedback of the bilateral masseter muscle activities. Occlusal contacts were recorded three times every clench level.
To evaluate occluasl contacts, following factors were analyzed.
1.ooclusal force
2.area of occlusal contacts
3.number of occlusal contacts
4.implant/natural teeth supported force ratio
The following results were obtained.
1.The occlusal force increased differently from the way in superstructures of implant and natural teeth.
2.Response of fixed partial prostheses supported by implants was dependent on classification of the edentulous zone where the implants had been placed.
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