Characteristics of lip-mouth region in smiling position from 80 persons with acceptable faces and individual normal occlusions / 中国医学科学杂志(英文版)

ABSTRACT

<p><b>OBJECTIVE</b>The characteristics of lip-mouth region including the soft and hard tissues in smiling position with frontal fixed position photographic computer-aided analysis were studied.</p><p><b>METHODS</b>The subjects were 80 persons (40 male and 40 females, age range 17 to approximately 25 years) with acceptable faces and individual normal occlusions. The subjects were asked to take maximum smiling position to accept photographic measurement with computer-aided analysis.</p><p><b>RESULTS</b>The maximum smile line could be divided into 3 categories low smile line (16.25%), average smile line (68.75%), and high smile line (15%).</p><p><b>CONCLUSION</b>The method adopting maximum smiling position to study the lip-month region is reproducible and comparable. This study would be helpful to provide a quantitative reference for clinical investigation, diagnosis, treatment and efficacy appraisal.</p>