illing materials are used for the treatment of the wrinkles on our faces, with lip thickening and creating a face with more volume purposes. There are various filling materials. Some of these are temporary and some of them are permanent. Although permanent filling materials sound good, in the long term they have negative and unpredictable results and their treatment is very hard. Hyaluronic acid is temporary and it’s the most commonly-used material. There are various brands used on the market. There are differences between brands in terms of permanency. Us. It is important to use a more reliable brand.