title: Root cementum modulates periodontal regeneration in Class III furcation defects treated by the guided tissue regeneration technique: a histometric study in dogs.
abstract: BACKGROUND
  Because the possibility of root cementum preservation as an alternative approach for the treatment of periodontal disease has been demonstrated, this study aimed to histometrically evaluate the effect of root cementum on periodontal regeneration.
  
  
  METHODS
  Bilateral Class III furcation defects were created in dogs, and each dog was randomly assigned to receive one of the following treatments: control (group A): scaling and root planing with the removal of root cementum; or test (group B): removal of soft microbial deposits by polishing the root surface with rubber cups and polishing paste, aiming at maximum cementum preservation. Guided tissue regeneration (GTR) was applied to both groups.
  
  
  RESULTS
  Four months after treatment, a superior length of new cementum (3.59 +/- 1.67 mm versus 6.20 +/- 2.26 mm; P = 0.008) and new bone (1.86 +/- 1.76 mm versus 4.62 +/- 3.01 mm; P = 0.002) and less soft tissue along the root surface (2.77 +/- 0.79 mm versus 1.10 +/- 1.48 mm; P = 0.020) was observed for group B. Additionally, group B presented a larger area of new bone (P = 0.004) and a smaller area of soft tissue (P = 0.008).
  
  
  CONCLUSIONS
  Within the limits of this study, root cementum may modulate the healing pattern obtained by guided tissue regeneration in Class III furcation defects.
authors.affiliation: Division of Periodontics, School of Dentistry at Piracicaba, State University of Campinas, São Paulo, Brazil.
authors.forename: Patricia F
authors.initials: PF
authors.lastname: Gonçalves
authors.forename: Bruno C V
authors.initials: BC
authors.lastname: Gurgel
authors.forename: Suzana P
authors.initials: SP
authors.lastname: Pimentel
authors.forename: Enilson A
authors.initials: EA
authors.lastname: Sallum
authors.forename: Antonio W
authors.initials: AW
authors.lastname: Sallum
authors.forename: Márcio Z
authors.initials: MZ
authors.lastname: Casati
authors.forename: Francisco H
authors.initials: FH
authors.lastname: Nociti
mesh_terms: D000818:Animals; D003739:Dental Cementum / Q000502:physiology*; D004285:Dogs; D017823:Furcation Defects / Q000628:therapy*; D016557:Guided Tissue Regeneration, Periodontal / Q000379:methods*; D008297:Male; D011897:Random Allocation; D016745:Root Planing / Q000009:adverse effects; D016896:Treatment Outcome