The main disadvantage is the lack of strong fixation, and the long-term bone compression and absorption may occur in the augmentation of silicone prosthesis. Silicone prosthesis is hard, has low buffering effect, has no relieving process for pressure, and directly acts on bone, which is a potential factor causing bone absorption. Silicone prosthesis and expansion chin pad usually do not need additional fixation, so complications of prosthesis displacement are easy to occur; In addition, the length of silicone prosthesis is generally 3.0-4.7cm, if you compare your mandible.
Hyaluronic acid injection: The advantages are less trauma, less pain, repeated injection and short operation time (local anesthesia can be used for surgery, and postoperative care is not needed, so it is also hyped as "beauty lunch break"). Hyaluronic acid can not only increase the chin volume, but also improve the skin surface contour, such as solving the soft tissue relaxation of chin, the deepening of anterior mandibular groove and labial groove and the fine wrinkles formed by skin aging, which can not be solved by prosthesis augmentation.
The disadvantage is that the effect of hyaluronic acid is temporary and reversible, and the duration of hyaluronic acid with different crosslinking degrees is different. Generally, hyaluronic acid needs to be injected 2-3 times a year in order to maintain the effect. In addition, hyaluronic acid is a colloid, which has poor long-term shaping effect and is not suitable for large-scale injection. My personal experience is that hyaluronic acid is more suitable for mild jaw deformity.