Which hard and soft tissue factors relate with the...[Angle Orthod. 2008] - PubMed Result

Which hard and soft tissue factors relate with the...[Angle Orthod. 2008] - PubMed Result: "Which hard and soft tissue factors relate with the amount of buccal corridor space during smiling?
Yang IH, Nahm DS, Baek SH.

Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, South Korea.

OBJECTIVE: To investigate which hard and soft tissue factors relate with the amount of buccal corridor area (BCA) during posed smiling. MATERIALS AND METHODS: The samples consisted of 92 adult patients (19 men and 73 women; 56 four first bicuspids extraction and 36 nonextraction treatment cases; mean age = 23.5 years), who were treated only with a fixed appliance and finished with Angle Class I canine and molar relationships. To eliminate the crowding effect on the buccal corridor area, lateral cephalograms, dental casts, and standardized frontal posed smile photographs were obtained at debonding stage and 28 variables were measured. Pearson correlation analysis, multiple linear regression analysis, and independent t-test were used to find variables that were related with buccal corridor area ratio (BCAR). RESULTS: Among the lateral cephalometric and dental cast variables, FMA, lower anterior facial height, upper incisor (U1) exposure, U1 to facial plane, lower"