Figure 2.

Sunken temples. The danger zone is marked in red: Intravascular injection into the superficial temporal artery should be avoided while injecting with a needle. At the point of maximum depression, the needle is placed perpendicular to the skin and advanced slowly until contact with the periosteum is felt. Slow injection of small amounts of Radiesse will maximize safety. There is evidence of small arteries running over the periosteum so there is a theoretical risk of intra-arterial injection. Slow injection reduces the risk of retrograde displacement and embolization of intraorbital (including retinal) arteries. Low volume injection minimizes necrotic area. Due to supraperiosteal placement, the temporal muscle, which is connected by loose connective tissue, is hydrodissected from the periosteum.