There are hundreds of moisturizers that could be used on the face before or after surgery and everyone may have a different opinion of which they prefer. You may want to contact your surgeon's office to see if they have a preference of which moisturizer to use. A moisturizer with sun protection in it would be helpful.
TI am presuming you are asking about the application of cream to the scars and the neck /face after surgery. To be honest it is the massage and the amount of massage of the cream that is more important than the actual cream. Of course each PS will have a favourite cream but at the end of the day it is the quality of the massage that provides the most benefit.