title: Efficacy of Alveolar Vertical Distraction Osteogenesis and Autogenous Bone Grafting for Dental Implants: Systematic Review and Meta-Analysis.
abstract: OBJECTIVE
  The aim of this study was to assess the efficacy of alveolar vertical distraction osteogenesis and autogenous bone grafting in terms of bone gain, bone resorption, and implant survival and success rates and investigate the relationship between bone gain and resorption after alveolar vertical distraction osteogenesis.
  
  
  METHODS
  A systematic search was done using MEDLINE, EMBASE, the Cochrane Library, and KoreaMed from inception to April 30, 2014. Supplementary manual searches of published full-text articles were also performed.
  
  
  RESULTS
  Searches of four electronic databases and manual searches resulted in 1,538 articles. After selection, four studies were included in the systematic review and meta-analysis. The difference in bone gain at the end of distraction or bone grafting was statistically significant (weighted mean difference [WMD] 1.86, 95% CI 0.03 to 3.69, P = .05; heterogeneity: I(2) = 78%, P = .01). However, there was not a statistically significant difference between alveolar distraction osteogenesis and onlay bone grafting (WMD 0.30, 95% CI -0.99 to 1.59, P = .065). Bone resorption between the end of treatment and the time of implant placement was not statistically significant (WMD -0.12, 95% CI -1.10 to 0.85, P = .80; heterogeneity: I(2) = 78%, P = .01). A simple equation related to bone gain and resorption after alveolar vertical distraction was induced from these results.
  
  
  CONCLUSIONS
  There was not a statistically significant difference between alveolar distraction osteogenesis and onlay bone grafting in terms of bone gain and bone resorption.
authors.forename: Kyoung-In
authors.initials: KI
authors.lastname: Yun
authors.forename: Hyungkil
authors.initials: H
authors.lastname: Choi
authors.forename: Robert F
authors.initials: RF
authors.lastname: Wright
authors.forename: Hyeong Sik
authors.initials: HS
authors.lastname: Ahn
authors.forename: Brian M
authors.initials: BM
authors.lastname: Chang
authors.forename: Hyun Jung
authors.initials: HJ
authors.lastname: Kim
mesh_terms: D016301:Alveolar Bone Loss / Q000473:pathology; D000539:Alveolar Process / Q000473:pathology; D000540:Alveolar Ridge Augmentation / Q000379:methods*; D016025:Bone Transplantation / Q000379:methods*; D015921:Dental Implants; D006801:Humans; D019857:Osteogenesis, Distraction / Q000379:methods*; D016019:Survival Analysis; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants