A 70-year-old woman presented with dog bite avulsion to her upper 
lip. She lost about seventy percent of upper red lip and a part of 
white lip including the vermilion border. Through the wound, we could 
see the cut edges of the obricularis oris muscle in both sides. In the 
center of the wound, there was a part of mucosa left and she lost most 
of the obricularis oris muscle.
     She said that blood spouted from the wound directly after injury. 
We supposed that the both side of labial arteries were cut off in the 
muscle stumps. When she arrived the hospital, hemostasis had been 
achieved.
     We gave her the infusions of antibiotic Cefazolin only one day. 
Day 2, we confirmed that no signs of infection were seen. We did not 
use antibiotics during following days.

     We used Gentamicin ointment for topical use, and sealed the wound 
with the dressing which had brand name Tielle(tm) over the applied 
ointment.

     Day 4, the wound was covered with proper granulation. Days 7, we 
changed the dressing materials to Allevyn(tm) and ointment.

     Day 11, the defect of mucosa and skin reduced rapidly. Her lip 
was regenerated to form normally. We changed dressing materials to 
Duoactive ET(TM) only.

     Day 21, the wound closed completely and her lip formed normally. 
With regenerated lip, she could close her mouth, eat without problems 
and speak fully functionally.