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.
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| http://dx.doi.org/10.1111/clr.13734 | DOI Listing |
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Evaluation of the fabrication trueness and internal fit of additively manufactured two-piece zirconia abutments with different build orientations compared to subtractively manufactured abutments.
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Article Synopsis
- Titanium dental implants have biological and esthetic limitations, leading to increased interest in zirconia implants, which are praised for their appearance and compatibility with the body.
- A study involving 9 zirconia implants placed in 8 adults showed a 1-year survival rate of 88.8%, with one implant failing after 6 months.
- The results indicated stable soft tissue and minimal bone loss over the year, suggesting that two-piece zirconia implants could be a reliable option for tooth replacement.
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