새로운 정량적 마모 지표를 이용한 한국인과 일본인의 제1대구치의 마모도 비교
Comparisons of Tooth Wear of the First Molar in Korean and Japanese Using New Quantitative Measurement Parameters
남신은, 박영석, 류홍렬, 임영설, 이승표,
소속 상세정보
남신은 ( Nam Shin-Eun ) - 서울대학교 치의학대학원 구강해부학교실
박영석 ( Park Young-Seok ) - 서울대학교 치의학대학원 구강해부학교실
류홍렬 ( Ryu Hong-Ryeol ) - 서울대학교 치의학대학원 구강해부학교실
임영설 ( Lim Young-Seol ) - 서울대학교 치의학대학원 구강해부학교실
이승표 ( Lee Seung-Pyo ) - 서울대학교 치의학대학원 구강해부학교실
KMID : 0362220120390030241
Abstract
This study was aimed to compare the amount of tooth wear between Korean and Japanese quantitatively using newly developed tooth wear parameters. Maxillary and mandibular full-mouth dental stone casts were prepared from female dental students of Korea and Japan. The casts were scanned and rendered as virtual dental models with 3-D scanner. Reference points are selected, which is stable even after wear, on the first molar of virtual model through specialized program tools. Virtual vectors and occlusal planes were generated from reference points. Two maxillary and three mandibular angles between cusp tips, and four heights from virtual vectors or occlusal planes to central pits of both arches were measured and analysed. Independent-samples T-Test or Mann-Whitney Test were performed to compare differences between two racial groups. Angles between cusp tips were larger and the heights from virtual vectors and occlusal planes to the central pit were shorter in Korean groups (p<.05). That is, cusps were shorter in Korean than Japanese, which means tooth wear was greater in Korean. Especially, the heights from buccal/lingual occlusal planes to the central pits showed high statistically significant differences in both maxillary and mandibular first molars (p<.001). These results could be used as meaningful quantitative parameters in case of comparisons of different tooth wear tendency between races.
키워드
Japanese; Koreans; Quantitative measurement; Tooth wear; Virtual model
원문 및 링크아웃 정보
등재저널 정보