RESUMO
BACKGROUND: A plethora of noninvasive approaches has been developed in recent years for facial rejuvenation. Energy-based devices have been one of the most popular treatments for reversing and preventing signs of facial aging such as fine lines, wrinkles, ptosis, and photoaging. AIMS: A new technology (RecoSMA) for skin rejuvenation based on acoustic-interference method using Er:YAG laser (2936 nm) equipped with a special module that targets both the dermis and the superficial musculoaponeurotic system (SMAS) was recently demonstrated to be safe and effective in facial rejuvenation. PATIENT/METHODS: In this follow-up prospective study, the clinical effects of recoSMA treatment on skin structures and SMAS were evaluated with ultrasound and histological analysis, at 30 and 90 days posttreatment. RESULTS: Treatment with recoSMA was shown to result in a significant increase in thickness of the epidermis, dermis, and SMAS layer, while levels of collagen I, III, and IV were shown to be elevated at 90 days posttreatment. CONCLUSION: Collectively, data show that treatment with recoSMA laser has a profound biological effect in stimulating and reconstructing the elastin/collagen framework necessary for preventing facial aging.