ArticleInternational journal of implant dentistry2023
Preload and friction in an implant-abutment-screw complex including a carbon-coated titanium alloy abutment screw: an in vitro study.
Article in International journal of implant dentistry, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- Distinct Structural Determinants of Failure in Morse Taper and Internal Hex Implant Systems.Journal of functional biomaterials · 2026Article
- Titanium Base-Free Multi-Unit Abutment Connections: A Critical Review of Prosthetic Screw Design, Biomechanical Behavior, and Clinical Performance.Materials (Basel, Switzerland) · 2026Review
- Differential effects of abutment contamination within an internal hexagonal connection on preload formation and load-dependent preload loss.The journal of advanced prosthodontics · 2026Article
- [Impact of ultrasonic scaling on abutment screw torque in implant restorations].Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences · 2026Article
- Biomechanical Effects of Platform Diameter and Screw Length in an Abutment-Free Tissue-Level Implant System Compared with a Ti-Base Configuration: 3D Finite Element Analysis.Journal of functional biomaterials · 2025Article
- Effect of Abutment Screw Design on Torque Loss Under Cyclic Fatigue Loading: A Comparison of TSIII and KSIII Implant Systems.Bioengineering (Basel, Switzerland) · 2025Article
- Stress Assessment of Abutment-Free and Three Implant-Abutment Connections Utilizing Various Abutment Materials: A 3D Finite Element Study of Static and Cyclic Static Loading Conditions.Journal of functional biomaterials · 2025Article
- Volumetric Engineered 3D Drug Reservoir Against Diabetic Implant Infection via Cuproptosis-Like Bacterial Death and Hunger-Triggered Maintenance of Mitochondrial Integrity.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- Visuohaptic Feedback in Robotic-Assisted Spine Surgery for Pedicle Screw Placement.Journal of clinical medicine · 2025Article
- Influence of Abutment Screw-Tightening Methods on the Screw Joint: Immediate and Long-Term Stability.International journal of dentistry · 2024Article
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeAn experimental approach was designed to measure the preload force, the coefficient of friction and the component of the tightening torque that is needed to surmount the thread-friction in an implant-abutment-screw complex that includes a carbon-coated screw. With the determined preload values the coefficient of friction was calculated.
methods25 unused complexes, containing an implant, an abutment and a carbon-coated titanium alloy abutment screw, were tested. A custom load frame with two load cells and associated electronics was used. The threads were not lubricated. All abutment screws were torqued ten times to 25 Ncm. The produced preload values and a force that was proportional to the thread-friction component of the tightening torque were recorded.
resultsMean preload values decreased significantly with the number of repetitions (p < 0.0001) from initially 329.9 N ± 33.3 (range 255.7 to 383.9) to 253.7 N ± 36.8 (range 200.1 to 332.5) for the last tightening procedure. The corresponding change in the calculated coefficient of friction was 0.33 ± 0.04 (range 0.28 to 0.43) to 0.44 ± 0.07 (range 0.32 to 0.56). For the thread-friction no corresponding trend for consecutive tightening repetitions could be noticed.
conclusionsIn the investigated implant-abutment units, repeated use of a coated abutment screw appears to increase the friction of the screw head and thereby decrease the preload. These results indicate that a pre-used coated implant-abutment-screw will fail reaching optimal screw preload.
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