This woman had a face lift operation and a chemical peel of the skin around her mouth.  But she also had another procedure, called a pre-jowl implant.  The jowl makes a bulge in the jaw line, and there usually appears to be a dent just in front of the jowl.  The face lift pulls the jowl's excess skin up and back toward the ear to smooth the jaw line, but the smoothing can be more effective if we put something underneath the skin to push out that dent at the same time.

That something is called a pre-jowl implant, and as the name suggests, it fills out the depression in front of the jowl.  The implant looks very much like a chin implant, but it is shaped so that it doesn't make the chin stronger from the profile view.  The face lift surgery tutorial contains a chapter devoted to the topic of pre-jowl implants (the surgery tutorials contain explicit photographs taken during surgery).