title: Healing of intra-bony defects following treatment with a composite bovine-derived xenograft (Bio-Oss Collagen) in combination with a collagen membrane (Bio-Gide PERIO).
abstract: OBJECTIVE
  The purpose of the present study was to compare clinically the treatment of deep intra-bony defects with a combination of a composite bovine-derived xenograft (BDX Coll) and a bioresorbable collagen membrane [guided tissue regeneration (GTR)] to access flap surgery only.
  
  
  METHODS
  Thirty-two patients, each of whom displayed one intra-bony defect, were treated either with BDX Coll+GTR (test) or with access flap surgery (control). The results were evaluated at 1 year following therapy.
  
  
  RESULTS
  No differences in any of the investigated parameters were observed at baseline between the two groups. Healing was uneventful in all patients. At 1 year after therapy, the test group showed a reduction in the mean probing depth (PD) from 8.3+/-1.5 to 2.9+/-1.3 mm (p<0.001) and a change in the mean clinical attachment level (CAL) from 9.4+/-1.3 to 5.3+/-1.5 mm (p<0.0001). In the control group, the mean PD was reduced from 8.0+/-1.2 to 4.4+/-1.7 mm (p<0.001) and the mean CAL changed from 9.6+/-1.3 to 7.9+/-1.6 mm (p<0.01). The test treatment resulted in statistically higher PD reductions (p< or =0.05) and CAL gains (p<0.001) than the control one. In the test group, all sites (100%) gained at least 3 mm of CAL. In this group, a CAL gain of 3 or 4 mm was measured at 10 sites (62%), whereas at six sites (38%), the CAL gain was 5 or 6 mm. In the control group, no CAL gain occurred at three sites (19%), whereas at 10 sites (62%), the CAL gain was only 1 or 2 mm. A CAL gain of 3 mm was measured in three defects (19%).
  
  
  CONCLUSIONS
  Within the limits of the present study, it can be concluded that the combination of BDX Coll+GTR resulted in significantly higher CAL gains than treatment with access flap surgery alone, and thus appears to be a suitable alternative for treating intra-bony periodontal defects.
authors.affiliation: Department of Periodontology, Radboud University Medical Center, 6500 Nijmegen, The Netherlands. a.sculean@dent.umcn.nl
authors.forename: Anton
authors.initials: A
authors.lastname: Sculean
authors.forename: Giovanni C
authors.initials: GC
authors.lastname: Chiantella
authors.forename: Péter
authors.initials: P
authors.lastname: Windisch
authors.forename: Nicole B
authors.initials: NB
authors.lastname: Arweiler
authors.forename: Michel
authors.initials: M
authors.lastname: Brecx
authors.forename: István
authors.initials: I
authors.lastname: Gera
mesh_terms: D016301:Alveolar Bone Loss / Q000601:surgery*; D000818:Animals; D001857:Bone Matrix / Q000637:transplantation; D001861:Bone Regeneration / Q000187:drug effects*; D018786:Bone Substitutes / Q000494:pharmacology; D002417:Cattle; D003094:Collagen / Q000494:pharmacology; D004338:Drug Combinations; D005260:Female; D016557:Guided Tissue Regeneration, Periodontal / Q000379:methods*; D006801:Humans; D008297:Male; D008567:Membranes, Artificial; D008903:Minerals / Q000494:pharmacology; D013524:Surgical Flaps
chemical_list: C106416:Bio-Gide; C077540:Bio-Oss; D018786:Bone Substitutes; D004338:Drug Combinations; D008567:Membranes, Artificial; D008903:Minerals; D003094:Collagen