title: Survival rates of short (6 mm) micro-rough surface implants: a review of literature and meta-analysis.
abstract: OBJECTIVE
  The aim of this review was to test the hypothesis that 6 mm micro-rough short Straumann(®) implants provide predictable survival rates and verify that most failures occurring are early failures.
  
  
  METHODS
  A PubMed and hand search was performed to identify studies involving micro-rough 6-mm-short implants published between January 1987 and August 2011. Studies were included that (i) involve Straumann(®) 6 mm implants placed in the human jaws, (ii) provide data on the survival rate, (iii) mention the time of failure, and (iv) report a minimum follow-up period of 12 months following placement. A meta-analysis was performed on the extracted data.
  
  
  RESULTS
  From a total of 842 publications that were screened, 12 methodologically sound articles qualified to be included for the statistical evaluation based on our inclusion criteria. A total of 690 Straumann(®) 6-mm-short implants were evaluated in the reviewed studies (Total: placed-690, failed-25; maxilla: placed-266, failed-14; mandible: placed-364, failed-5; follow-up period: 1-8 years). A meta-analysis was performed on the calculated early cumulative survival rates (CSR%). The pooled early CSR% calculated in this meta-analysis was 93.7%, whereas the overall survival rates in the maxilla and mandible were 94.7% and 98.6% respectively. Implant failures observed were predominantly early failures (76%).
  
  
  CONCLUSIONS
  This meta-analysis provides robust evidence that micro-rough 6-mm-short dental implants are a predictable treatment option, providing favorable survival rates. The failures encountered with 6-mm-short implants were predominantly early and their survival in the mandible was slightly superior.
authors: Department of Gerodontology and Removable Prosthodontics, School of Dental Medicine, Geneva, Switzerland; Department of Stomatology and Oral Surgery, School of Dental Medicine, Geneva, Switzerland.
authors: Murali
authors: M
authors: Srinivasan
authors: Lydia
authors: L
authors: Vazquez
authors: Philippe
authors: P
authors: Rieder
authors: Osvaldo
authors: O
authors: Moraguez
authors: Jean-Pierre
authors: JP
authors: Bernard
authors: Urs C
authors: UC
authors: Belser
mesh_terms: D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention; D019232:Dental Restoration Failure; D006801:Humans; D013499:Surface Properties
chemical_list: D015921:Dental Implants
keywords: dental implant; implant length (6 mm); literature review; meta-analysis; micro-rough surface; short dental implants