Holly, There are three types of filler classes that are most often used in the temple region - hyaluronic acid (HA), adipose tissue (fat), and poly-L-lactic acid (Sculptra.) Voluma, a type of HA, and as the name implies, provides excellent volume restoration to the temple region. Injection with a micro-cannula (blunt tip) results in less bruising, less risk of injury to the nerve that controls forehead motion, and overall less discomfort when injecting. Fat injection can also be considered if you are looking for a more permanent solution; however, fat must first be harvested from another portion of the body or an exogenous (outside) source of fat can also be used. Sculptra, unlike, HA or fat fillers, volumizes by stimulating your own tissue to produce collagen by creating a local reaction in the skin. As a result, it usually takes longer (months) to see noticeable changes and may require multiple rounds of injection especially with deep hallowing. Ultimately, each filler class has its own merits. An evaluation with an expert injector is recommended so that you can achieve the best yet safe outcome for your desired look.