Calcium Hydroxyapatite (CaHA) filler is a type of dermal filler used primarily in aesthetic medicine for facial volume restoration, wrinkle reduction, and contour enhancement. It’s best known by the brand name Radiesse®, although other formulations exist.
A biocompatible substance found naturally in human bones and teeth.
In filler form, it consists of microspheres of CaHA suspended in a gel carrier.
The particles are smooth and round, mimicking the mineral structure of bone.
Immediate Effect: The gel provides instant volume after injection.
Collagen Stimulation: Over time, the CaHA microspheres stimulate natural collagen production, leading to longer-lasting results.
Gradual Absorption: The gel and microspheres are metabolized by the body over several months.
Typically 12–18 months, sometimes longer, depending on:
Injection site
Individual metabolism
Amount used
Nasolabial folds (smile lines)
Marionette lines
Jawline contouring
Chin enhancement
Cheek augmentation
Hand rejuvenation
Lips or areas requiring very fine, flexible fillers (due to its thicker consistency)
Superficial wrinkles (risk of nodules or lumps if placed too shallow)
Patients with certain autoimmune diseases
Natural-looking results
Long-lasting
Stimulates your own collagen production
Biodegradable and safe for most people
Swelling, redness, bruising at injection site
Lumps or nodules (especially if improperly injected)
Rare risk of vascular occlusion
Not reversible (unlike hyaluronic acid fillers, which can be dissolved with hyaluronidase)
