Straumann Scientific Highlights

Issue No.3 / 2018

April - June 2018

DOWNLOAD the April-June issue of our “Scientific Highlights” newsletter with short summaries of recently published scientific evidence.

Editor’s choice: The study of Amorfini et al. where the authors compared the clinical outcomes of screw-retained vs cemented single crowns supported by customized zirconia abutments on Straumann RN TL SLA implants after 10 years follow up.

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Int J Prosthodont. 2018 July/August;31(4):359–366

COMPARISON OF CEMENTED VS SCREW-RETAINED, CUSTOMIZED COMPUTER-AIDED DESIGN/COMPUTER-ASSISTED MANUFACTURE ZIRCONIA ABUTMENTS FOR ESTHETICALLY LOCATED SINGLE-TOOTH IMPLANTS: A 10-YEAR RANDOMIZED PROSPECTIVE STUDY.

Amorfini L, Storelli S, Mosca D, Scanferla M, Romeo E

Study objectives: The aim of this in vitro study was to compare the clinical outcomes of screw-retained vs cemented single crowns supported by customized zirconia abutments on implants. Thirty-two patients received implant-supported (Regular Neck, Tissue-Level, Straumann AG), single-tooth restorations with customized zirconia abutments in the anterior areas. Participants were randomly assigned to the screw-retained (full-crown abutment [FCA]) group or the cemented (zirconia crown [ZrC]) group and followed up over a 10-year period. Prosthetic and biologic complications, marginal bone level (MBL), mucosal recession, and pink and white esthetic scores (PES and WES, respectively) were evaluated.

Results and conclusions

  • There were no implant failures during the study period; after 10 years, 94% of crowns were functional.
  • Prosthetic complications were recorded in both groups (three FCA and two ZrC), and no significant difference was found (P = .65).
  • Two cases of mucositis were recorded, one in each group.
  • Esthetic outcomes were assessed using PES and WES scores. MBL was 0.95 mm in the ZrC group and 0.82 mm in the FCA group, with no significant difference between groups.
  • These encouraging preliminary results need to be confirmed with long-term follow-up on larger study samples

Adapted from Amorfini L et al., Int J Prosthodont. 2018 July/August;31(4):359–366, for more info about this publication click HERE