RENÚ® Calcium Hydroxylapatite (CaHA) Soft Tissue Filler Implant is a sterile, semi-solid, cohesive implant. The principle durable component is synthetic calcium hydroxylapatite. The semi-sold nature is created by suspending the calcium hydroxylapatite particles in a durable high yield strength thixotropic gel. The aqueous phosphate buffer gel carrier consists of sodium carboxymethylcellulose and glycerin. The carrier resorbs in vivo, so that the calcium hydroxylapatite remains at the site of implantation, providing a scaffold for local tissue infiltration. This cellular infiltrated hydroxylapatite scaffold provides the long-term non-permanent restoration and augmentation. Over time, the tiny micro-particles gradually break down into calcium and phosphate ions that are naturally absorbed by the body.