The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)
- Volume 36 Issue 1
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- Pages.166-182
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- 1998
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- 0301-2875(pISSN)
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- 2005-3789(eISSN)
A STUDY OF MANDIBULAR DENIAL ARCH OF KOREAN ADULTS
한국 성인 유치악자의 하악 치열궁에 관한 조사
- Kim, Il-Han (Department of Prosthodontics, School of Dentistry, Kyung Hee University) ;
- Choi, Dae-Gyun (Department of Prosthodontics, School of Dentistry, Kyung Hee University)
- Published : 1998.02.01
Abstract
The purposes of this study are to evaluate the Korean mandibular dental arch and classify the mandibular dental arch shape and size based on the incisal angle, canine angle, inter second molar width and height. In this study the mandibular study models were fabricated using irreversible hydrocolloid impression material from 225 volunteers with a mean age 23.62 (range 19-29). And the study models were measured with 3-dimensional measuring device and the mandibular dental arch was classified by means of K-means clustering method and visual inspection, then obtained data were analyzed with t-test for the statistical analysis. The results were as follows ; 1. The average canine height was 5.19mm(s.d. 1.17) in both sex, 5.34mm in male, and 4.95mnm in female. And the sexual difference was significant( ). 2. The average second molar height was 39.81mm(s.d. 2.44) in both sex, 40.19mm in male, and 39.21mm in female. And the sexual difference was significant( ). 3. The average inter-canine width was 27.16mm(s.d. 1.78) in both sex, 27.41mm in male, and 26.77mm in female. And the sexual difference was significant( ). 4. The average inter-first molar width was 46.93mm(s.d. 2.67) in both sex, 47.72mm in male, and 45.7mm in female. And the sexual difference was significant( ). 5. The inter-second molar width was average 56.09mm(s.d. 3.01) in both sex, 57.24mm in male, and 54.32mn in woma. And the sexual difference was significant( ). 6. The arch form was classified into three shapes based on the incisal and canine angle. V-shape showed
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