DOI: 10.36347/sjds.2019.v06i09.007

Pages: 414-422

Aim: To evaluate the soft tissue characteristics of skeletal Class II Division 1 subjects (group II) with high mandibular plane angel compared with skeletal Class I subjects (group I) in himachali population. Material and Methods: Lateral cephalograms of 100 adults (60 women, 40 men; age range 18-50yrs) were divided into 2 groups based on horizontal and vertical skeletal pattern (SN-MP angle): group I, 50 subjects; group II-high angle (>37°), 50 subjects. The correlations and multiple linear regression tests were used to determine the skeletal and dental variables influencing soft tissue characteristics. Results: Group II-high angle showed significantly greater values than did group I for basic lower lip thickness and lower lip length. The perioral soft tissue measurements of group II were correlated with the inclination and anteroposterior position of the maxillary and mandibular incisors along with facial depth (N-Go) and facial length (S-Gn). Upper lip strain of group II was not influenced by any skeletal variables but only by the inclination and anteroposterior position of the maxillary incisors. Conclusions: It is important to evaluate lip strain and lip thickness based on the skeletal pattern as well as dental inclination to obtain balance in the perioral muscle activity.