Chances of permanent damage to the marginal mandibular nerve with jowl liposuction?

I am a 32 year old female who will be undergoing vertical and horizontal chin augmentation with a sliding genioplasty. If chin augmentation alone is not enough to reduce the structurally-associated premature/pseudo jowls, the surgeon may also perform minor liposuction. What are the chances of permanent nerve damage when this is performed by someone very familiar with facial anatomy, specifically an oral and maxillofacial surgeon with cosmetic specialties? Thank you very much in advance!