title: A prospective 5-year multicenter study of the Cresco implantology concept.
abstract: OBJECTIVE
  The purpose of this study was to investigate the clinical and radiographic outcome of a prospective 5-year longitudinal multicenter test of a simplified implantology concept comprising an abutment-free implant system (Cresco) and a new method for fabrication of passively fitting superstructures, the Cresco Ti Precision method.
  
  
  METHODS
  The tests were carried out at three different centers. Sixty partially or completely edentulous patients were restored by fixed implant-supported superstructures fabricated according to the Cresco Ti Precision method. In all, 215 Cresco implants were placed for the support of the superstructures. For various reasons, eight patients (13%) could not be followed through the 5 years. The radiographic measurements were recorded from radiographs exposed perpendicular to the implants.
  
  
  RESULTS
  The initial implant failure rate (during the healing phase) was 2%, and the survival rate after loading was 98%. The mean peri-implant bone loss was 0.29 mm (SD 0.57). Of the measured sites, 71% showed a crestal bone loss of less than 0.5 mm. Very few mechanical complications were observed. This was attributed to the passively fitting superstructures.
  
  
  CONCLUSIONS
  The results from the present multicenter test demonstrated that the abutment-free Cresco implantology concept is a reliable alternative method for implant-supported fixed prosthetic rehabilitation of edentulous and partially edentulous jaws.
authors.affiliation: Department of Periodontology and Oral Medicine, Vanersborg Central Hospital, Sweden. leif.hellden@telia.com
authors.forename: Leif
authors.initials: L
authors.lastname: Helldén
authors.forename: Gunnel
authors.initials: G
authors.lastname: Ericson
authors.forename: Agnetha
authors.initials: A
authors.lastname: Elliot
authors.forename: Jan
authors.initials: J
authors.lastname: Fornell
authors.forename: Kurt
authors.initials: K
authors.lastname: Holmgren
authors.forename: Krister
authors.initials: K
authors.lastname: Nilner
authors.forename: Carl Olof
authors.initials: CO
authors.lastname: Olsson
mesh_terms: D000328:Adult; D000368:Aged; D016301:Alveolar Bone Loss / Q000145:classification; D000044:Dental Abutments; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007575:Jaw, Edentulous / Q000534:rehabilitation / Q000601:surgery; D007576:Jaw, Edentulous, Partially / Q000534:rehabilitation / Q000601:surgery; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D016348:Osseointegration; D011446:Prospective Studies; D016019:Survival Analysis; D016896:Treatment Outcome; D014945:Wound Healing
chemical_list: D015921:Dental Implants