Chin filler is the deep placement of a firm, high-cohesivity hyaluronic acid directly on the chin bone (the mentum), in small, deliberate deposits that adjust the chin’s three dimensions: projection (how far forward it reaches), height (how long it runs vertically), and shape (how its point and sides are drawn). The reason a few milliliters here outperform larger volumes elsewhere is that the chin is a reference point, not a feature in isolation.
