하악 절치 근원심 폭경과 법랑질 두께의 관계

Abstract

Objective: The purpose of this study was to investigate the relationship between the enamel thickness of proximal surfaces and the morphologic factors of mandibular incisors. Methods: MD/FL (mesiodistal/faciolingual) index, MD width, height of contour width/cervical width ratio were measured in 40 extracted incisors of Koreans. when measuring height of contour width/cervical width ratio, cervical width was measured by measuring the distance between proximal CEJs. And then the labial surface was grinded to the height of contour level to measure enamel thickness. Pearson correlation analysis was used to investigate the correlation between enamel thickness and morphologic factors. Results: The enamel thickness was 0.75±0.07mm per side, and MD width was 5.56±0.40mm. There was significant correlation between enamel thickness and the MD width. But there was no significant relationship between enamel thickness and MD/FL index, height of contour width/cervical width ratio. Conclusion: The results suggest that the enamel thickness is affected only by the MD width. Therefore, of MD width is same, the limit of enamel reduction for reproximation is same between mandibular incisors with large MD/FL index or triangular shape and mandibular incisors with normal shape.