The Hydrogel procedure to treat cartilage lesions is based on a liquid consisting of two components that are mixed and applied to the cartilage lesion. Once the mixture consisting of Dextran and Hyaluronic Acid is applied, it will begin to adhere to the surrounding cartilage and bone within 30-40 seconds. The purpose of this adhesion is to prevent further damage in the joint. Cells then begin to grow in and with the help of other cells from the healthy surrounding tissue, new smooth hyaline cartilage can be formed.