<ORIGINAL ARTICLE>Evaluation of Soft Tissue Profiles : An Investigation by Cephalograms and Facial Pictures

P(論文)The primary objective of this study is to grasp the individuality of the soft tissue profile of anterior cross-bite cases. For the purpose of the present study, cephalograms and enlarged facial pictures were obtained from 58 patients (28 boys and 30 girls) with anterior cross-bite malocclusion ; the mean age was 8 years 0 months. The patients were classified into 3 groups in accordance with ANB. Angular and linear measurements were performed on tracing film and statistical analysis was performed using mean values, a correlative matrix and t-test for significant levels. The results were as follows ; 1. From the comparison between skeletal groups and dental groups, a significant relationship was found among, ANB, NAP, NP-A, NP-U1, NP-L 1 in hard tissue and n'-Sn-Pog, Sn-Sn', ls-ls' in soft tissue. 2. From a comparison between hard tissues and soft tissues, it was found that the antero-posterior relationship of basal arches, and the position of the upper and lower incisers were reflected in the soft tissue profile. 3. The lip posture was proposed as a factor which influences the concavity of facial profile.departmental bulletin pape