title: Radiological evaluation of the Cresco system in combination with Osseospeed implants: a preliminary 3-year report.
abstract: OBJECTIVE
  In this preliminary study, the 3-year radiological outcomes of Osseospeed implant-supported fixed complete or partial prostheses made with two different laboratory protocols were compared.
  
  
  METHODS
  A convenience sample of 34 patients, who were either partially or completely edentulous in either jaw, were randomly assigned to two groups, of 17 patients each, using either a traditional laboratory protocol (control group) or the Cresco one (test group). The study's objective was an assessment of marginal bone loss around implants, measured on intraoral radiographs at 3-year follow-up.
  
  
  RESULTS
  None of the implants inserted was lost during the study and radiological measurements of marginal bone level changes revealed that the mean marginal bone loss was respectively 0,73±0,33mm for test group and 0,88±1,13mm for control group. The differences between test and control groups were not statistically significant.
  
  
  CONCLUSIONS
  This preliminary study did not demonstrate statistically significant differences in marginal bone loss around implant-prostheses prepared with the two different laboratory protocols, over the 3-year observational period.
authors.affiliation: Tuscan School of Dental Medicine, University of Firenze and Siena, Siena, Italy.
authors.forename: N
authors.initials: N
authors.lastname: Baldini
authors.affiliation: Tuscan School of Dental Medicine, University of Firenze and Siena, Siena, Italy.
authors.forename: M
authors.initials: M
authors.lastname: DE Sanctis
authors.affiliation: Tuscan School of Dental Medicine, University of Firenze and Siena, Siena, Italy.
authors.forename: M C
authors.initials: MC
authors.lastname: Cagidiaco
authors.affiliation: Tuscan School of Dental Medicine, University of Firenze and Siena, Siena, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Balleri
authors.affiliation: Tuscan School of Dental Medicine, University of Firenze and Siena, Siena, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Vignoletti
authors.affiliation: Tuscan School of Dental Medicine, University of Firenze and Siena, Siena, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Goracci
authors.affiliation: Tuscan School of Dental Medicine, University of Firenze and Siena, Siena, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Ferrari
keywords: 3-year preliminary report; Cresco system; implant-supported prostheses; marginal bone loss