대한치과보철학회지 (The Journal of Korean Academy of Prosthodontics)
- 제36권1호
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- Pages.81-103
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- 1998
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- 0301-2875(pISSN)
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- 2005-3789(eISSN)
자연치열자와 가철성 국소의치 장착자의 저작효율과 근활성도에 관한 비교 연구
A STUDY ON MASTICATORY PERFORMANCE AND MUSCLE ACTIVITY IN REMOVABLE PARTIAL DENTURE WEARERS
- Paik, Jin (Department of Prosthodontics, School of Dentistry, Kyung Hee University) ;
- Park, Nam-Soo (Department of Prosthodontics, School of Dentistry, Kyung Hee University)
- 발행 : 1998.02.01
초록
The purpose of this study was to compare and evaluate the differences in masticatory performance, muscle activity, and patterns of occlusal contact between persons with natural dentition and removable partial denture wearers. Twenty healthy adult subjects with more than 28 teeth and thirteen removable partial denture wearers that classified Kennedy classification I was selected. The degree of pulverized rice and peanut was measured and analyzed by means of sieving method to compare the masticatory performance. For the muscle activity, EMG was recorded in selected muscles(Temporalis and masseter muscle) during mastication and resting state. The occlusal record in maximal intercuspation was taken with a silicone occlusal bite registration material for analysis of the patterns of occlusal contact. The obtained results were as follows: 1. When chewed peanuts, masticatory performance ratio at 10-sieve size was 81.31% in natural dentition group. In removable partial denture wearer, 27.01% without RPD and 69.09% with RPD. When chewed rice, 42.04%, 11.87%, and 21.58%, respectively. The differences of masticatory performance ratio between groups were statistically significant at the 0.05 level. 2. The mean EMG value in resting state was
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