Journal of the Korean Academy of Pediatric Dentistry 2008;35(3):399-417.
Published online August 31, 2008.
A STUDY OF RELATIONSHIP BETWEEN BITE FORCE, MASSETER MUSCLE AND CRANIOFACIAL MORPHOLOGY : CEPHALOMETRIC & ULTRASONOGRAPHIC ANALYSIS
Mi Sook Lee1, Yeong Chul Choi2, Sung-Chul Choi2, Gwang-Chul Kim2
1Department of Pediatric Dentistry, School of Dentistry, Kyung Hee University
2Institute of Oral Biology, School of Dentistry, Kyung Hee University 
교합력, 교근과 두개안면골 형태의 관계 : 두부규격방사선사진과 초음파진단영상 분석
이미숙1, 최영철2, 최성철2, 김광철2
1경희대학교 치과대학 구강생물학연구소
2경희대학교 치과대학 구강생물학연구소
Correspondence:  Yeong Chul Choi,  Tel: 02-958-9373, Email: choiyc@khu.ac.kr
Received: 25 February 2008   • Accepted: 29 April 2008
Abstract
The aim of this study was to investigate the relationships between bite force, masseter muscle and craniofacial morphology. 141 individuals were included. Bite forces were measured with a bite force transducer(SKT 2004). The facial morphology of the samples was evaluated on the Lateral and PA cephalometric radiographs(Asahi CX-90 SP). Ultrasonographic images were obtained for 36 individuals(Logiq 500). General status of the subjects were also measured for investigating possible relationships. Their relationships were analyzed by means of t-test, Pearson's correlation coefficients and simple regression analysis. In conclusion, bite force of molar was significantly correlated with craniofacial morphology for males and females, but not to masseter muscles. The masseter muscle for males had a significant correlation with craniofacial morphology. The unexpected negative correlations between size of masseter muscle and maxillary width was revealed for males. One possible way to arrive at a plausible explanation for the correlation between masster muscle, bite force and craniofacial morphology of males were the deep layer of masseter muscle had a great influence on males and the superficial layer of masseter muscle had a great influence on females.
Key Words: Bite force, Masseter muscle, Craniofacial characteristics, Facial Index, Cephalometrics, Ultrasonography
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