title: Peri-implant bone loss in cement- and screw-retained prostheses: systematic review and meta-analysis.
abstract: OBJECTIVE
  The aim of this systematic review and meta-analysis was to assess and compare peri-implant marginal bone loss in cement- and screw-retained prostheses.
  
  
  METHODS
  Electronic database and manual searches were undertaken to identify trials, prospective or retrospective studies reporting on radiographic marginal bone loss around dental implants restored with cement- and/or screw-retained prostheses. Two reviewers independently conducted the article selection and data extraction. Random-effects models were used to obtain estimates of peri-implant marginal bone loss [mean, 95% confidence intervals (CI)].
  
  
  RESULTS
  Of the 1217 identified studies, nine finally met the inclusion criteria. Only two studies included both cement- and screw-retained prostheses, three assessed only screw-retained prostheses, and four evaluated only cement-retained prostheses. Pooled mean marginal bone loss was 0.53 mm (CI 95%, 0.31-0.76 mm) for cement-retained prostheses and 0.89 mm (CI 95%, 0.45-1.33 mm) for screw-retained prostheses.
  
  
  CONCLUSIONS
  There is no evidence to support differences in the marginal bone loss through indirect comparison between cement and screw-retained restorations.
authors.affiliation: Implantology Department, INOVI, Vitória, ES, Brazil.
authors.forename: Marcelo L
authors.initials: ML
authors.lastname: de Brandão
authors.forename: Mario V
authors.initials: MV
authors.lastname: Vettore
authors.forename: Guaracilei M
authors.initials: GM
authors.lastname: Vidigal Júnior
mesh_terms: D016301:Alveolar Bone Loss / Q000209:etiology*; D002484:Cementation / Q000379:methods*; D003738:Dental Cements / Q000737:chemistry; D059605:Dental Implant-Abutment Design; D015921:Dental Implants; D017268:Dental Prosthesis Retention / Q000295:instrumentation* / Q000379:methods; D019094:Dental Prosthesis, Implant-Supported; D006801:Humans; D057873:Peri-Implantitis / Q000209:etiology*
chemical_list: D003738:Dental Cements; D015921:Dental Implants