前歯部人工歯の排列基準に関する研究 : 第1報年齢と上下顎前歯の露出度の関係について

概要

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In selecting and arranging anterior artificial teeth for edentulous patients, it is necessary to consider their sex, personality, age and other factors. 'the relation of upper and lower tip lines to incisal edge has been one of the standards for the selection and the arrangement of anterior artificial teeth. The purpose of this report was to establish and to evaluate decision bases for the selection and arrangement. We recorded and measured the exposure rate of anterior natural teeth (48 men, 46 women) during function, such as smile, pronunciaion, by means of the image analysis. Following results were obtained. 1. As the age of patients increased, upper anterior teeth appeared less than tower's. 2. Differences in exposure ratio between upper and lower teeth were found more remarkable in smiling rather than in pronunciation.
1990-04-01