title: Root coverage in isolated gingival recessions using autograft versus allograft: a pilot study.
abstract: BACKGROUND
  Different surgical techniques have been used to treat gingival recessions. This preliminary study compared clinical findings for the treatment of isolated gingival defects using a coronally positioned flap associated with a subepithelial connective tissue graft or an acellular dermal matrix graft.
  
  
  METHODS
  Ten subjects with bilateral and comparable Miller Class I or II defects were selected. The defects were > or =3.0 mm deep and were assigned randomly to the test group, which was treated with a coronally positioned flap associated with an acellular dermal matrix, or to the control group, which was treated with a coronally positioned flap associated with a subepithelial connective tissue graft. Probing depth (PD), clinical attachment level (CAL), gingival recession depth (GRD), and width (KT) and thickness (GT) of the keratinized tissue were assessed at baseline and 6 months after the surgery.
  
  
  RESULTS
  Mean root coverage was 50% in the test group (representing a gingival margin shift of 2.1 +/- 0.99 mm) and 79.5% in the control group (representing a gingival margin shift of 3.5 +/- 1.20 mm). These results were statistically different on intra- and intergroup comparisons (P <0.05). Between-group comparisons revealed statistically significantly greater gains in CAL, GRD, and GT in the control group (P < or =0.05); no differences were found for PD or KT (P > or =0.05).
  
  
  CONCLUSIONS
  The coronally positioned flap associated with a subepithelial connective tissue graft or an acellular dermal matrix graft was effective in root coverage. However, the coronally positioned flap associated with a connective tissue graft provided a more favorable clinical outcome. More expanded studies are needed to confirm the present findings.
authors.affiliation: Department of Periodontics, São Leopoldo Mandic Dental Research Center, Campinas, SP, Brazil. joly@vivax.com.br
authors.forename: Julio C
authors.initials: JC
authors.lastname: Joly
authors.forename: Alexandre M
authors.initials: AM
authors.lastname: Carvalho
authors.forename: Robert C
authors.initials: RC
authors.lastname: da Silva
authors.forename: Danilo L
authors.initials: DL
authors.lastname: Ciotti
authors.forename: Patricia R
authors.initials: PR
authors.lastname: Cury
mesh_terms: D000328:Adult; D004812:Epidemiologic Methods; D005260:Female; D005881:Gingiva / Q000601:surgery*; D005889:Gingival Recession / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D017768:Skin, Artificial; D013524:Surgical Flaps; D016378:Tissue Transplantation / Q000379:methods*; D014092:Tooth Root; D014182:Transplantation, Autologous; D014184:Transplantation, Homologous