A randomized prospective multicenter trial evaluating the platform-switching technique for the prevention of postrestorative crestal bone loss

Loris Prosper, Sara Redaelli, Massimo Pasi, Fernando Zarone, Giovanni Radaelli, Enrico F. Gherlone

Research output: Contribution to journalArticle

Abstract

Purpose: The purpose of this study was to evaluate the effectiveness of the platform-switching technique to prevent crestal bone loss following the restoration of dental implants. Materials and Methods: This randomized prospective multicenter trial analyzed 60 partially edentulous adults recruited at 12 professional dental centers. Subjects were randomly selected to receive either platform-enlarged or control cylindric implants in three different surgical procedures: conventional nonsubmerged, submerged, and submerged with a reduced abutment. The primary outcome measure was the change in crestal bone level assessed radiographically 12 and 24 months following placement. Nonparametric analysis of variance for repeated measures (the Friedman test) was used to assess the overall significance over time of the differences among implants in changes in crestal bone levels. Comparisons among and between groups of implants were performed by the nonparametric Friedman and Wilcoxon tests, respectively. In all the analyses an α =.05 was considered significant. Results: A total of 360 implants were placed (60 for each group). Three control implants failed during the 2nd year following placement. All submerged and 92% of nonsubmerged platform-enlarged implants exhibited no bone loss. Control implants with an abutment as large as the implant platform exhibited more bone loss than their platform-enlarged counterparts (P

Original languageEnglish
Pages (from-to)299-308
Number of pages10
JournalThe International journal of oral & maxillofacial implants
Volume24
Issue number2
Publication statusPublished - 2009

Keywords

  • Bone loss
  • Crestal bone
  • Dental implants
  • Platform-switching technique

ASJC Scopus subject areas

  • Oral Surgery

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