The first of the injectable fillers, Restylane is a formulation of stabilized hyaluronic acid first approved by the FDA as a filler for nasolabial folds (nose to mouth) when injected into the subdermal facial tissue. It has since been used for lip enhancement, contouring, and volumizing. As with all fillers, the enhancement effect and duration are dependent on the area injected, the patient’s age, skin type, and skin thickness. Lip injections typically last up to six months, but can last longer. Some patients can have prolonged results lasting over a year, but follow-up injections may be recommended earlier. Mild bruising can occur, but reactions are rare as Restylane is a non-animal based product.
Other fillers are similar to Restylane, but may differ in their formulation causing them to have a higher viscosity or Q factor. A high viscosity product (Voluma) has more structural integrity and can be used to support larger and more prominent soft tissue areas of the face (cheek area and malar arch).