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.
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