Answer:
An arterialized myocutaneous flap of the remaining vermillion can be
advanced to close a defect based on the labial artery. This can be done
in a unipedicle or a bipedicle manner. Another method is an orbicularis
myomucosal flap advanced as a V-Y plasty. A bipedicled musculomucosal flap
can be advanced anteriorly to repair vermillion defects. Lateral buccal
musculomucosal flaps can be transposed. The next choice of donor
tissue is the tongue but less than ideal because of color mismatch. Full-thickness
grafts of palatal mucosa can also be used but color match is poor. Also
grafts of labia minora can be used. Finally radial forearm free flap with
tattooing can be used in reconsructing missing vermillion.