Evaluation of the in vivo effects of various laser, light, or ultrasound modalities on human skin treated with a collagen and polymethylmethacrylate microsphere dermal filler product.

Background: Bellafill® is a soft tissue dermal filler composed of non-resorbable polymethylmethacrylate (PMMA) microspheres, suspended in a water-based carrier gel composed of 3.5% bovine collagen. It has been approved by the FDA for the correction of nasolabial folds and atrophic facial acne scars.