Traditional fillers are soft substances, liquids or gels which can be injected into the skin to improve the appearance of fine lines and wrinkles, plump lips, fill out cheek hollows, and repair other facial imperfections. They work by filling out the space below the wrinkles, replacing lost fat.

Traditional fillers can be injected into the dermis or subcutaneous layer of the skin, depending on the filler and treatment goal.

Traditional fillers can be natural or synthetic. Natural fillers may contain human or animal collagen; or animal hyaluronic acid. Most traditional fillers are broken down by the body over time and thus are temporary. Depending on the substance injected, you may be required to have a skin test prior to being treated . Optimal results may require several injections. Effects may last three to six months depending upon the type of filler used. After the filler degrades, a new round of treatment will be required to maintain the desired results.

Potential side effects for dermal injectables
As with all medical procedures that involve injection through the skin, there are certain risks and restrictions associated with the use of injectable facial dermal products. You should not use a product if you have a history of allergy to any of its ingredients. For some products, skin tests will be necessary to determine if you are allergic to the product. You should not use these products if you have an infection at the injection site. The most common side effects following an injection procedure include localized pain, tenderness, redness, bleeding and bruising. In addition, there may be other risks associated with a particular type of injectable that you should discuss with your doctor to fully understand these risks.