ArticleBMC oral health2026
Stress evaluation in one-piece and bone- or tissue-level two-piece zirconia dental implants with ceramic or titanium abutment screws: a finite element analysis.
Article in BMC oral health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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Who cites it
1 citing paper in PubMed.
- Effect of Implant Design on Fracture Resistance, Mode, and Crystal Structure of One- and Two-Piece Zirconia Implants With Ceramic or Titanium Abutment Screws: An In Vitro Study.Clinical oral implants research · 2026Article
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundVarious designs of dental implants made of zirconium dioxide (zirconia) as an alternative to titanium implants are available as one-piece implant (OPI) or as bone-level or tissue-level two-piece implants (TPI) with either ceramic or titanium abutment screw types of implant-abutment connections. This study aimed to identify and quantify stress concentrations and levels across different zirconia implant designs under a quasi-static external load.
methodsThe study used a finite element analysis (FEA) simulation model, including five zirconia implant design models of OPI and bone-level and tissue-level TPI zirconia implants with either ceramic or titanium abutment screw, to calculate and locate maximum principal (σ1) and minimum principal (σ3) and equivalent (von Mises) stresses under 400N of quasi-static loading at a 30-degree angle within ISO14801:2016 geometry and boundary conditions. The FEA assumed linear elastic and isotropic material properties.
resultsOPI showed high stress concentrations at the implant body’s external thread above the specimen holder. TPIs showed similar maximum principal stress (σ1) areas in their implant body, while minimum principal stress (σ3) occurred in the implant–abutment interface at the abutment neck, and the corresponding area in the implant platform. The TPIs with ceramic screws exhibited the highest stresses at the screw–abutment interface.
conclusionsWithin the limitations of this study, under a static oblique load applied within the ISO 14801:2016 geometry condition, stress distributions differ between OPI and TPI. TPIs show lower stress within the implant body but higher stress transfer to the specimen holder compared with OPI. Tissue-level TPIs exhibit lower stress than bone-level designs, whereas stresses in the abutment and screw depend on screw design and material. TPIs with ceramic screws exhibit higher stress levels compared to titanium screw.
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