title: Effect of barrier membranes and autologous bone grafts on ridge width preservation around implants.
abstract: BACKGROUND
  The purpose of this study was to explore the effect of barrier membranes and autologous bone grafts on the preservation of ridge width around implants.
  
  
  METHODS
  Sixty-one patients were chosen from a database of case series; treatment assignment was based on clinical judgment. The patients received a total of 76 implants: 34 implants with guided tissue regeneration procedures, 27 with autologous bone grafts, and 15 without ridge preservation procedures (control group).
  
  
  RESULTS
  The ridge width around the 76 implants decreased an average of 1.4 mm (95% CI, -1.9 to -1.1 mm). Implants placed with autologous bone grafts or membranes tended to have worse outcomes. When compared to the no augmentation group, implants placed with guided tissue regeneration and autologous bone grafts resulted in 0.1 mm of additional bone loss (95% CI, -1.7 to -1.5 mm; p < .93) and 0.8 mm of additional bone loss (95% CI, -2.3 to 0.7 mm; p < .28), respectively.
  
  
  CONCLUSIONS
  Autologous graft procedures or barrier membranes do not appear to improve crestal ridge preservation around implants.
authors.affiliation: University of Southern California School of Dentistry, Los Angeles, CA, USA. Branebill@AOL.com
authors.forename: William
authors.initials: W
authors.lastname: Becker
authors.forename: Philippe
authors.initials: P
authors.lastname: Hujoel
authors.forename: Burton E
authors.initials: BE
authors.lastname: Becker
mesh_terms: D000368:Aged; D016301:Alveolar Bone Loss / Q000209:etiology* / Q000517:prevention & control; D000540:Alveolar Ridge Augmentation / Q000009:adverse effects*; D016025:Bone Transplantation / Q000009:adverse effects*; D003758:Dental Implantation, Endosseous / Q000009:adverse effects; D015921:Dental Implants / Q000009:adverse effects*; D005260:Female; D016557:Guided Tissue Regeneration, Periodontal / Q000009:adverse effects* / Q000379:methods; D006801:Humans; D008297:Male; D008567:Membranes, Artificial; D008875:Middle Aged; D012189:Retrospective Studies; D014081:Tooth Extraction / Q000009:adverse effects
chemical_list: D015921:Dental Implants; D008567:Membranes, Artificial