Facial scars resulting from a transbuccal approach during osteosynthesis of a sagittal split osteotomy: A retrospective study

The purpose of the current study was to assess the quality of facial linear scars. The Stony Brook Scar Evaluation Scale (SBSES) was developed and validated as a tool to assess postoperative scars. Postoperative facial scars were rated using high-quality macrophotographs and SBSES by three independent raters at baseline and three months thereafter. Percentage agreement (PA) and intraclass correlation coefficient (ICC) were used to measure interrater and intrarater reliability. Scar outcomes ranging from 0 (worst) to 5 (best) were evaluated against age and gender. One-hundred-sixty-six patients with a mean age of 30.6 years (range of 17–59) were included in this study. Forty-four were male (26.5%), and 122 were female (73.5%). Mean total SBSES scores were 4.63 (range of 4.56–4.76) at baseline and 4.60 (range of 4.54–4.72) at three months. As patient's age increased, mean total SBSES scores also decreased significantly (r = −0.216, p = 0.005). Gender did not significantly affect raters’ perception of scar cosmesis (p = 0.847). Interrater reliability showed an ICC of 0.675 (95% CI, 0.609–0.731) and a PA of 65.4% at baseline, and an ICC of 0.655 (95% CI, 0.585–0.715) and a PA of 64.2% at three months. Intrarater reliability found ICCs ranging from 0.988 to 0.990 and a PA of 96.8% with 3 separate raters. Within the limitations of the study it seems that the transbuccal approach during osteosynthesis of a sagittal split osteotomy seems still to be acceptable when the patient gives his or her informed consent and advanced instruments like an angled screwdriver are not available.