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  • Title: Wound tension in rhytidectomy. Effects of skin-flap undermining and superficial musculoaponeurotic system suspension.
    Author: Burgess LP, Casler JD, Kryzer TC.
    Journal: Arch Otolaryngol Head Neck Surg; 1993 Feb; 119(2):173-6; discussion 176-7. PubMed ID: 8427680.
    Abstract:
    This study was conducted to determine the effects of skin-flap undermining and superficial musculoaponeurotic system (SMAS) suspension on wound-closing tension. Nine sides from five fresh-frozen cadavers were used, with closing tension measured at the two main anchor points, anteriorly (A) and posteriorly (P), with and without SMAS plication for minimal (MIN), intermediate (INT), and maximal (MAX) skin-flap undermining. Results indicated that closing tension was significantly decreased with SMAS plication, both A and P, for all three levels of skin undermining. The average decrease in closing tension with SMAS plication was: A-MIN 191 g, A-INT 95 g, A-MAX 83 g, P-MIN 235 g, P-INT 68 g, and P-MAX 70 g (P < .001 for all). Considering the effect of skin-flap undermining alone, closing tension decreased with wider skin-flap undermining, both with and without SMAS plication. The tension-reducing effect of SMAS plication was decreased with wider skin-flap undermining. Regression analysis determined a second-order exponential curve relating closing tension to skin excision.
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