I Can't Smile with my Chin Implant After 9 Months

One of the common risks of chin augmentation is damage to the marginal mandibular nerve which helps to lower the bottom lip and show your teeth during a smile. One or both sides can be affected. After 9 months all the swelling is gone and unless you have seen some gradual improvement in the movement of your lower lip then likely your chances of having any return of function of that nerve are minimal at best. You need to discuss this with your surgeon.