Trial reportClinical oral implants research2025
A Randomised Controlled Trial Evaluating 3-Year Survival Rates and Technical Complications of Screw-Retained Hybrid Abutment Crowns on Two-Piece Zirconia and Titanium Implants.
Trial report in Clinical oral implants research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
3 citing papers in PubMed.
- A 3-Year Split-Mouth Randomized Non-Inferiority Controlled Trial Comparing Cement-Retained Monolithic CAD-CAM Zirconia and Lithium Disilicate Crowns for Single Posterior Implant Restorations.Clinical oral implants research · 2026Trial
- Prospective clinical study to evaluate the survival of two-piece zirconia implants: a single-center study. 36-month results.International journal of implant dentistry · 2026Article
- Fracture resistance of premolar screw-retained implant-supported hybrid abutment crowns with monolithic restorations after thermomechanical aging.The journal of advanced prosthodontics · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
Abstract
objectivesThis study compares the cumulative survival and technical complications of screw-retained implant-supported lithium disilicate crowns (SICs) on polyether ketone ketone (PEKK) base abutments and zirconia implants with those of titanium base abutments and titanium implants. MATERIALS AND
methodsSixty participants were randomly and evenly assigned to receive zirconia or titanium implants. Survival and technical complications were assessed at 6 weeks after crown placement (baseline) up to 36 months. The cumulative survival of the SICs was analysed as a non-inferiority design, assuming that the difference between the titanium group and the zirconia group is not more than 10%. Technical complications were assessed based on modified USPHS criteria and Pink Aesthetic Score (PES).
resultsIn the zirconia group, three early implant failures occurred; all of them were successfully revised. After baseline, three implants in the zirconia group were lost due to insufficient osseointegration, and therefore the SICs have to be categorised as failures even though none of the SICs failed. The non-inferiority of the zirconia group could not be confirmed, as the cumulative survival was 10.7% lower compared to the titanium group (100%). The technical complication rate was low, with no statistically significant difference between the groups. The PESs improved significantly compared to baseline, with no significant difference between the groups at 12 months.
conclusionHybrid abutment SICs with PEKK base abutments on two-piece zirconia implants could be an alternative to hybrid abutments SICs with titanium base on titanium implants. However, the lower osseointegration rate of the zirconia implants has to be considered.
trial registrationThis study was registered in the German Clinical Trial Register (Deutsches Register Klinischer Studien) (number: DRKS00014866).
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