Scientific article

Two-piece zirconia implants supporting all-ceramic crowns : six-year results of a prospective cohort study

Published inClinical oral implants research, vol. 32, no. 6, p. 695-701
Publication date2021-06
First online date2021-04-06

Objectives: The aim of this prospective clinical trial was to present the 6-year outcomes of a two-piece yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) implant system in partially edentulous patients.

Material and methods: Forty-nine two-piece zirconia implants were placed in 32 patients systemically healthy. Zirconia abutments were connected with adhesive resin cement. Single-unit full-ceramic crowns were cemented. The cases have been followed for an average of 82.2 ± 5.86 months after loading (range 74.93-92.26 months).

Results: 24 participants with 39 implants were available for examination 6 years after loading. The cumulative implant survival rate was 83%. On an implant level, the cumulative mechanical complication rate was 17.5%, the cumulative technical complication rate was 13%, and the biological complication rate was 8%. After 6 years, subjects reported good satisfaction with the treatment: 3.7 ± 4.4 on a visual analog scale (VAS) from 0 to 100 mm.

Conclusions: Within the limitations of this prospective case series study, two-piece zirconia implants could offer an alternative for treatment of single edentulous spaces in the posterior region. The major complication on the long term of this pioneering system was the abutment fracture; however, due to the versatility of a two-piece implant system, replacement of the broken parts was possible.

  • Clinical trial
  • Dental implants
  • Zirconia
  • Ceramics
  • Crowns
  • Dental Abutments
  • Dental Implants
  • Dental Restoration Failure
  • Humans
  • Prospective Studies
  • Zirconium
Citation (ISO format)
CIONCA, Norbert, HASHIM, Dena Talal, MOMBELLI, Andrea. Two-piece zirconia implants supporting all-ceramic crowns : six-year results of a prospective cohort study. In: Clinical oral implants research, 2021, vol. 32, n° 6, p. 695–701. doi: 10.1111/clr.13734
Main files (1)
Article (Published version)
Secondary files (1)
ISSN of the journal0905-7161

Technical informations

Creation05/28/2024 10:30:14 AM
First validation05/29/2024 9:28:15 AM
Update time05/29/2024 9:28:15 AM
Status update05/29/2024 9:28:15 AM
Last indexation05/29/2024 9:28:35 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack