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Objective . We evaluated synergistic efficacy and safety of combined topical application of Botulinum Toxin Type A (BTX-A) with fractional CO 2  laser for facial rejuvenation.  Methods . Twenty female subjects were included for this split-face comparative study. One side of each subject's cheek was treated with fractional CO 2  plus saline solution, and the other side was treated with fractional CO 2  laser plus topical application of BTX-A. Patients received one session of treatment and evaluations were done at baseline, one, four, and twelve weeks after treatment. The outcome assessments included subjective satisfaction scale; blinded clinical assessment; and the biophysical parameters of roughness, elasticity, skin hydration, transepidermal water loss (TEWL), and the erythema and melanin index.  Results . BTX-A combined with fractional CO 2  laser sides showed higher physician's global assessment score, subject satisfaction score, roughness, skin hydration, and skin elasticity compared to that of fractional CO 2  plus saline solution side at 12 weeks after treatment. TEWL and erythema and melanin index showed no significant differences between two sides at baseline, one, four, and twelve weeks after treatment.  Conclusion . Topical application of BTX-A could enhance the rejuvenation effect of fractional CO 2  laser.

biomed research international

The Efficacy and Safety of Fractional CO<sub>2</sub>Laser Combined with Topical Type A Botulinum Toxin for Facial Rejuvenation: A Randomized Controlled Split-Face Study

The Efficacy and Safety of Fractional CO2Laser Combined with Topical Type A Botulinum Toxin for Facial Rejuvenation: A Randomized Controlled Split-Face Study

The Efficacy and Safety of Fractional CO₂Laser Combined with Topical Type A Botulinum Toxin for Facial Rejuvenation: A Randomized Controlled Split-Face Study