Which injectable is classified as a dermal stimulator, rather than a filler?

The injectable classified as a dermal stimulator, rather than a filler, is Poly-L-lactic acid. This substance is known for its unique mechanism of action; it works by stimulating collagen production in the skin over time, leading to gradual improvement in skin volume and elasticity. This biological response means that, unlike traditional fillers which simply add volume to specific areas, Poly-L-lactic acid ultimately promotes the skin's natural ability to rejuvenate and repair itself.

This distinction is important in aesthetics because while dermal fillers, such as hyaluronic acid and Restylane, provide immediate volume by directly filling in wrinkles or adding fullness to areas like the lips, a dermal stimulator works beneath the skin's surface to enhance the skin's natural structure and firmness over a longer period. Radiesse, although also a volumizing product, primarily acts as a filler with the added benefit of stimulating collagen to some extent; however, it does not have the primary function of stimulating collagen to the same degree as Poly-L-lactic acid. Understanding these differences helps practitioners choose the most appropriate treatment based on the individual needs and goals of their clients.