title: A two-year prospective study of coronally positioned flap with or without acellular dermal matrix graft.
abstract: OBJECTIVE
  Evaluation of the treatment of gingival recessions with coronally positioned flap with or without acellular dermal matrix allograft (ADM) after a period of 24 months.
  
  
  METHODS
  Thirteen patients with bilateral gingival recessions were included. The defects were randomly assigned to one of the treatments: coronally positioned flap plus ADM or coronally positioned flap alone. The clinical measurements were taken before the surgeries and after 6, 12 and 24 months.
  
  
  RESULTS
  At baseline, the mean values for recession height were 3.46 and 3.58 mm for the defects treated with and without the graft, respectively (p>0.05). No significant differences between the groups were observed after 6 and 12 months in this parameter. However, after 24 months, the group treated with coronally positioned flap alone showed a greater recession height when compared with the group treated with ADM (1.62 and 1.15 mm, respectively--p<0.05). A significant increase in the thickness of keratinized tissue was observed in the group treated with ADM as compared with coronally positioned flap alone (p<0.05).
  
  
  CONCLUSIONS
  ADM may reduce the residual gingival recession observed after 24 months in defects treated with coronally positioned flap. In addition, a greater gingival thickness may be achieved when the graft is used.
authors.affiliation: Department of Prosthodontics and Periodontics, Division of Periodontics, School of Dentistry at Piracicaba, State University of Campinas, São Paulo, Brazil.
authors.forename: Antonieta
authors.initials: A
authors.lastname: de Queiroz Côrtes
authors.forename: Antonio Wilson
authors.initials: AW
authors.lastname: Sallum
authors.forename: Marcio Z
authors.initials: MZ
authors.lastname: Casati
authors.forename: Francisco H
authors.initials: FH
authors.lastname: Nociti
authors.forename: Enilson A
authors.initials: EA
authors.lastname: Sallum
mesh_terms: D000328:Adult; D001672:Biocompatible Materials / Q000627:therapeutic use*; D003094:Collagen / Q000627:therapeutic use*; D005260:Female; D005500:Follow-Up Studies; D005881:Gingiva / Q000473:pathology; D005888:Gingival Pocket / Q000473:pathology / Q000601:surgery; D005889:Gingival Recession / Q000473:pathology / Q000601:surgery; D005893:Gingivoplasty / Q000379:methods*; D006801:Humans; D007633:Keratins; D008297:Male; D017622:Periodontal Attachment Loss / Q000473:pathology / Q000601:surgery; D011446:Prospective Studies; D013524:Surgical Flaps / Q000473:pathology; D016896:Treatment Outcome
chemical_list: C440568:Alloderm; D001672:Biocompatible Materials; D007633:Keratins; D003094:Collagen