In this study, we explore the changes in the earlobe segments following an extended superficial musculoaponeurotic system (SMAS) face-lift and neck lift. We proposed to delineate the effect of the cheek and neck skin tension vectors on the earlobe based on the amount of excised skin length. A retrospective study identified patients who underwent extended SMAS rhytidectomy performed by the senior author (A.M.) at the Cosmetic Plastic Surgery Institute (CPSI) from 2017 to 2020. A total of 34 North American Caucasians, who had preoperative and postoperative photographs available for comparison, were evaluated. Preoperative and postoperative cephalic (the distance from the intertragal notch to the otobasion inferius, abbreviated as I to O) and caudal earlobe segment (the distance from the otobasion inferius to the subaurale, abbreviated as O to S) heights were collected. The change from the postoperative to preoperative measurements was calculated. The effects of the degree of cheek skin (superior ear [SE]) and neck skin (mastoid peak [MP]) excision lengths were then determined by comparing the change in I to O and O to S. The postoperative attached cephalic segment (15.94 ± 1.02 mm) increased significantly compared with the preoperative attached cephalic segment (12.99 ± 1.03 mm). The postoperative free caudal segment (3.62 ± 0.81 mm) decreased significantly compared with the preoperative free caudal segment (5.44 ± 0.95 mm). The SE median was found to be 3.0 cm and the MP median was found to be 3.5 cm. I to O increased by 3.85 mm for SE ≤3.0 cm compared with only 1.57 mm for SE >3.0 cm. O to S decreased by 2.79 mm for SE ≤3.0 cm compared with only decrease of 0.14 mm for SE >3.0 cm. I to O increased by only 1.67 mm for MP < 3.5 cm. O to S decreased less dramatically by 0.55 mm for MP ≤3.5 cm compared with decrease of 2.39 mm for MP >3.5 cm. These data demonstrate that more aggressive SE >3.0 cm cheek excision lengths resulted in a protective effect on decreasing the free caudal segment of the earlobe. More aggressive excisions of the cheek demonstrate a protective effect on preserving the free earlobe caudal segment, whereas more aggressive neck skin excisions result in higher propensity for loss of the free earlobe caudal segment. In our study, we demonstrate findings observed with clinical observations that a face-lift and neck lift will result in increase in the attached cephalic earlobe segment height (I to O) and a decrease in caudal free earlobe segment height (O to S). These findings may assist plastic surgeons when trying to fine-tune the earlobe aesthetics during face-lift and neck lift. If the patient has a small free hanging earlobe, the more aggressive pull on the cheek flap will result in less reduction in the earlobe hang.
Biodynamic excisional skin tension lines
