evaluation of facial soft tissue parameters for northwestern students in iran

i ntroduction: we studied and measured facial parameters of 160 students,aged 22-24 years attended at sahand university of technology in northwest of iran. mat erial and methods: in this paper, six linear and six angular facial parameters are measured. these parameters are measured in frontal and profile facial images. the measured values are the mean and standard deviation (sd) of distance between the two medial canthi, width of alar base, length of nose, width of  mouth,  length of  upper  lip,  length of  lower  lip,  interlabial gap, nasofrontal angle, nasofacial angle, nasomental angle, nasolabial angle, mentolabial angle, and throat angle. the mean (sd) of the above mentioned parameters were 33mm (3), 38mm (2), 49mm (2), 46mm (3), 16mm (3), 14mm (1), 4mm (0.75), 127° (3°), 31° (2°), 127° (3°), 112° (5°), 135° (3°), 124° (2°), respectively. results: most of the parameters we measured were comparable in men and women. when we compared our results with studies in south of iran and elsewhere many differences were found and this shows that the measurement of  the  facial  parameters  in  different  races,  ethnic  groups,  and  regions  of country is necessary. conclusion: measurement of these parameters is vital in facial surgeries especially in aesthetic, maxillofacial, rhinoplasty and orthognathic surgeries.