caha

CaHA stands for calcium hydroxyapatite, a biocompatible material used as a dermal filler and bone substitute. It consists of microscopic calcium hydroxyapatite particles suspended in a resorbable gel carrier, typically carboxymethylcellulose. The filler provides immediate volume from the carrier and a longer-term effect from the CaHA particles, which stimulate collagen production and fibrous tissue remodeling as the carrier is resorbed.

In medical aesthetics, CaHA fillers are used for facial soft-tissue augmentation, contouring, and wrinkle reduction. Common indications include correction of medium to deep wrinkles such as nasolabial folds, enhancement of cheek fullness, jawline contouring, and hand rejuvenation. They can also be used off-label for scar improvement.

Onset and duration: Immediate volume is followed by gradual collagen-driven effects. The gel carrier is absorbed over weeks, while the CaHA particles remain and are gradually broken down over months to years. Overall results typically last about 12-18 months, depending on treated area, patient metabolism, and injection technique.

Safety and considerations: As with any injectable, risks include swelling, redness, bruising, tenderness, lumpiness, or nodules. Rare complications include infection or vascular occlusion; proper technique and anatomy knowledge minimize risk. Contraindications include active infection at the injection site, known allergy to CaHA components, and certain medical conditions or pregnancy.

History and brand: CaHA fillers have been marketed since the early 2000s, with products such as Radiesse widely used for facial augmentation and restoration of volume.