title: Double-layered collagen graft to the radial forearm free flap donor sites without skin graft.
abstract: BACKGROUND
  Radial forearm free flap is the most reliable flap for intraoral soft tissue reconstruction after cancer ablation surgery. However, unesthetic scar of the donor site and the need for a second donor site for skin graft are major disadvantages of the forearm flap. The purpose of this study was to report the clinical results of double-layered collagen graft to the donor site of the forearm free flap without skin graft.
  
  
  METHODS
  Twenty-two consecutive patients who underwent oral cancer ablation and forearm reconstruction between April 2010 and November 2013 were included in this study. Male to female ratio was 12:10, and average age was 61.0 years old (27-84). Double-layered collagen was grafted to the donor site of the forearm free flap and healed for secondary intention. Upper silicone had been trimmed at the periphery during secondary intention, and dry dressing was used. Postoperative scar healing and esthetic results and function were evaluated.
  
  
  RESULTS
  An average follow-up period was 34.9 months. The scar area was decreased to 63.9 % in average. The complete healing was obtained between 1.5 and 3 months according to the defect size. There was no functional defect or impairment 3 months after operation. All patients were satisfied with the esthetic results. Three patients died of recurred cancer.
  
  
  CONCLUSIONS
  Double-layered collagen graft was successfully performed in this study. Without the thigh skin graft, patients had experienced less painful postoperative healing periods and discomfort.
authors.affiliation: Department of Oral and Maxillofacial Surgery, College of Medicine, University of Ulsan, Seoul Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, 138-736 Seoul South Korea.
authors.forename: Tae-Jun
authors.initials: TJ
authors.lastname: Park
authors.affiliation: Department of Oral and Maxillofacial Surgery, College of Medicine, University of Ulsan, Seoul Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, 138-736 Seoul South Korea.
authors.forename: Hong-Joon
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Department of Oral and Maxillofacial Surgery, College of Medicine, University of Ulsan, Seoul Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, 138-736 Seoul South Korea.
authors.forename: Kang-Min
authors.initials: KM
authors.lastname: Ahn