title: Retrospective multicenter evaluation of tapered implant with a sandblasted and acid-etched surface at 1 to 4 years of function.
abstract: OBJECTIVE
  The aim of this retrospective study was to evaluate the cumulative survival rate of tapered implant with a sandblasted and acid-etched surface placed in edentulous patients.
  
  
  METHODS
  A retrospective study was performed by evaluating MIS seven implants consecutively placed from December 2004 to January 2008. Patient records were reviewed to determine gender, age at implant placement, implant location, prosthesis type, marginal bone loss according to treatment procedure, number of implants, and number of failed implants. The survival rate of the implants was analyzed, and radiographic evaluation was performed.
  
  
  RESULTS
  A total of 294 implants were placed in 92 patients at the 3 centers. The observation period after implantation ranged from 22 to 59 months, with a mean of 38 months. The cumulative survival rate of MIS seven implants was 97.3%. After 1 year of functional loading, the mean marginal bone loss was 0.33 mm.
  
  
  CONCLUSIONS
  This retrospective, multicenter study demonstrates that this dental implant system gives clinically reliable results.
authors.affiliation: Department of Dentistry and Oral and Maxillofacial Surgery, Catholic University Hospital of Daegu, Daegu, Republic of Korea.
authors.forename: Min-Su
authors.initials: MS
authors.lastname: Bae
authors.forename: Dong-Seok
authors.initials: DS
authors.lastname: Sohn
authors.forename: Mi-Ra
authors.initials: MR
authors.lastname: Ahn
authors.forename: Hyun-Woo
authors.initials: HW
authors.lastname: Lee
authors.forename: Heui-Seung
authors.initials: HS
authors.lastname: Jung
authors.forename: Im-Hee
authors.initials: IH
authors.lastname: Shin
mesh_terms: D000134:Acid Etching, Dental; D000328:Adult; D000368:Aged; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003794:Dental Restoration, Temporary; D005260:Female; D006801:Humans; D007575:Jaw, Edentulous / Q000534:rehabilitation* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D013499:Surface Properties; D016019:Survival Analysis; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants