title: A comparative study on the use of a HA/collagen/chondroitin sulphate biomaterial (Biostite) and a bovine-derived HA xenograft (Bio-Oss) in the treatment of deep intra-osseous defects.
abstract: OBJECTIVE
  This parallel-group, randomized, clinical trial was designed to evaluate the clinical outcome of deep intra-osseous defects following reconstructive surgery with the use of a synthetic hydroxyapatite/equine Type I collagen/chondroitin sulphate biomaterial (Biostite), as compared to a bovine-derived hydroxyapatite xenograft (Bio-Oss).
  
  
  METHODS
  Twenty-four systemically healthy subjects with moderate to advanced periodontitis, 11 females and 13 males, aged 30-64 years, seven smokers, were selected. Patients presented with one interproximal deep intra-osseous defect (intra-osseous component >or=4 mm) as clinically and radiographically evaluated. Immediately before surgery and 12 months after surgery, pocket probing depth (PPD), clinical attachment level (CAL) and radiographic depth of the defect (DEPTH) were evaluated.
  
  
  RESULTS
  Thirteen defects were treated with Biostite (test) and 11 defects with Bio-Oss (control). In the test group, PPD amounted to 7.8+/-1.3 mm before surgery, and decreased significantly to 3.6+/-1.6 mm 12 months following surgery, while in the control group PPD significantly decreased from 7.5+/-2.0 mm pre-surgery to 3.1+/-1.0 mm post-surgery. At 1 year, CAL gain and DEPTH gain were 2.9+/-1.9 and 2.5+/-1.4 mm, respectively, in the test group, and 4.0+/-2.4 mm and 3.1+/-1.8 mm, respectively, in the control group. No statistically significant differences for PPD reduction, CAL gain and DEPTH gain were detected between the groups.
  
  
  CONCLUSIONS
  The results of the present study indicate that both Biostite and Bio-Oss grafting biomaterials have determined a clinically and statistically significant improvement in terms of CAL gain, PPD reduction and radiographic DEPTH gain when used for the treatment of deep intra-osseous defects.
authors.affiliation: Research Center for the Study of Periodontal Diseases, University of Ferrara, Ferrara, Italy.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Scabbia
authors.forename: Leonardo
authors.initials: L
authors.lastname: Trombelli
mesh_terms: D000328:Adult; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000601:surgery*; D000539:Alveolar Process / Q000000981:diagnostic imaging; D000818:Animals; D001672:Biocompatible Materials / Q000627:therapeutic use*; D001857:Bone Matrix / Q000637:transplantation*; D018786:Bone Substitutes / Q000627:therapeutic use*; D002417:Cattle; D016009:Chi-Square Distribution; D003094:Collagen / Q000627:therapeutic use*; D005260:Female; D005500:Follow-Up Studies; D006025:Glycosaminoglycans / Q000627:therapeutic use*; D006801:Humans; D006882:Hydroxyapatites / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D008903:Minerals / Q000627:therapeutic use*; D017622:Periodontal Attachment Loss / Q000601:surgery; D010514:Periodontal Pocket / Q000601:surgery; D010518:Periodontitis / Q000601:surgery; D011859:Radiography; D014183:Transplantation, Heterologous; D016896:Treatment Outcome
chemical_list: C077540:Bio-Oss; D001672:Biocompatible Materials; C080295:Biostite; D018786:Bone Substitutes; D006025:Glycosaminoglycans; D006882:Hydroxyapatites; D008903:Minerals; D003094:Collagen