title: Evaluation of the zone of keratinized tissue using exposed acellular dermal matrix over tooth extraction sites: a randomized controlled clinical trial.
abstract: BACKGROUND
  The presence of an adequate zone of keratinized tissue has been associated with implant health. This study evaluated the zone of keratinized tissue using exposed acellular dermal matrix (ADM) over extraction sites.
  
  
  METHODS
  Fifteen sites received ADM, and fifteen control sites received no biomaterial. All sites were sutured with no attempt to achieve primary closure. Initial measurements of buccal and lingual keratinized tissue were taken from the mucogingival line (MGL) to the most coronal gingival margins. Final measurements were taken from the buccal MGL to the lingual MGL 90 days after surgery. Gingival biopsies were taken before implant placement.
  
  
  RESULTS
  Test and control groups exhibited a mean value of 4.40 ± 1.45 mm and 1.40 ± 1.40 mm, respectively. The newly formed tissue revealed similar histological aspect of normal keratinized tissue.
  
  
  CONCLUSIONS
  Exposed ADM used over tooth extraction sockets can predictably be used to increase the zone of keratinized tissue.
authors.affiliation: *Private Practice, Rio de Janeiro, Brazil. †Graduate Student, Department of Periodontolgy, Rio de Janeiro State University, Rio de Janeiro, Brazil. ‡Private Practice, Rio de Janeiro, Brazil. §Professor, Post Graduation Program, Fluminense Federal University, Rio de Janeiro, Brazil. ‖Graduate Student, Department of Periodontology, Fluminense Federal University, Rio de Janeiro, Brazil. ¶Chair Professor, Department of Periodontology, Fluminense Federal University, Rio de Janeiro, Brazil.
authors.forename: Sergio
authors.initials: S
authors.lastname: Ribeiro
authors.forename: Vinícius
authors.initials: V
authors.lastname: Ferreira
authors.forename: Bianca
authors.initials: B
authors.lastname: Stutz
authors.forename: Priscila
authors.initials: P
authors.lastname: Casado
authors.forename: Diogo
authors.initials: D
authors.lastname: Rodrigues
authors.forename: Eliane Porto
authors.initials: EP
authors.lastname: Barboza
mesh_terms: D062088:Acellular Dermis; D000328:Adult; D001706:Biopsy; D005260:Female; D005881:Gingiva / Q000473:pathology; D006801:Humans; D007633:Keratins / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D014081:Tooth Extraction / Q000379:methods*; D020390:Tooth Socket; D014945:Wound Healing; D055815:Young Adult
chemical_list: D007633:Keratins