title: Root coverage of advanced gingival recession: a comparative study between acellular dermal matrix allograft and subepithelial connective tissue grafts.
abstract: BACKGROUND
  Acellular dermal matrix allograft (ADMA) has successfully been applied as a substitute for free connective tissue grafts (CTG) in various periodontal procedures, including root coverage. The purpose of this study was to clinically compare the efficiency of ADMA and CTG in the treatment of gingival recessions > or = 4 mm.
  
  
  METHODS
  Seven patients with bilateral recession lesions participated. Fourteen teeth presenting gingival recessions > or = 4 mm were randomly treated with ADMA or CTG covered by coronally advanced flaps. Recession, probing depth, and width of keratinized tissue were measured preoperatively and 12 months postoperatively. Changes in these clinical parameters were calculated within and compared between groups and analyzed statistically.
  
  
  RESULTS
  Baseline recession, probing depth, and keratinized tissue width were similar for both groups. At 12 months, root coverage gain was 4.57 mm (89.1%) versus 4.29 mm (88.7%) (P = NS), and keratinized tissue gain was 0.86 mm (36%) versus 2.14 mm (107%) (P < 0.05) for ADMA and CTG, respectively. Probing depth remained unchanged (0.22 mm/0 mm), with no difference between the groups.
  
  
  CONCLUSIONS
  Recession defects may be covered using ADMA or CTG, with no practical difference. However, CTG results in significantly greater gain of keratinized gingiva.
authors.affiliation: Department of Periodontology, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel. talhaim@post.tau.ac.il
authors.forename: Haim
authors.initials: H
authors.lastname: Tal
authors.forename: Ofer
authors.initials: O
authors.lastname: Moses
authors.forename: Ron
authors.initials: R
authors.lastname: Zohar
authors.forename: Haya
authors.initials: H
authors.lastname: Meir
authors.forename: Carlos
authors.initials: C
authors.lastname: Nemcovsky
mesh_terms: D000328:Adult; D003094:Collagen; D003238:Connective Tissue / Q000637:transplantation; D005260:Female; D005889:Gingival Recession / Q000601:surgery*; D005893:Gingivoplasty / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009061:Mouth Mucosa / Q000637:transplantation*; D016038:Skin Transplantation; D017768:Skin, Artificial; D013524:Surgical Flaps; D016896:Treatment Outcome
chemical_list: C440568:Alloderm; D003094:Collagen