ArticleMedical & biological engineering & computing2020
Experimental validation of adaptive pedicle screws-a novel implant concept using shape memory alloys.
Article in Medical & biological engineering & computing, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 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.
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Who cites it
7 citing papers in PubMed, 17 citations in OpenAlex.
- A comprehensive review of biomechanical factors influencing pedicle screw fixation strength and the critical role of artificial intelligence.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026Article
- A Synergistic Patient-Specific Approach for Enhanced Spinal Fixation Using a Novel Flexible Pedicle Screw and a Complementary Steerable Drilling Robotic System.IEEE transactions on bio-medical engineering · 2026Article
- Feasibility of a Shape-Memory-Alloy-Actuator System for Modular Acetabular Cups.Bioengineering (Basel, Switzerland) · 2024Article
- Four-Dimensional Printing and Shape Memory Materials in Bone Tissue Engineering.International journal of molecular sciences · 2023Review
- Functionalization of screw implants with superelastic structured Nitinol anchoring elements.Biomedical engineering online · 2022Article
- Investigation into the Hybrid Production of a Superelastic Shape Memory Alloy with Additively Manufactured Structures for Medical Implants.Materials (Basel, Switzerland) · 2021Article
- Biological Cell Investigation of Structured Nitinol Surfaces for the Functionalization of Implants.Materials (Basel, Switzerland) · 2020Article
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
Abstract
Pedicle screw fixation is a standard procedure in spine surgery. A secure anchoring in deficient (e.g., osteoporotic) bone or in a secondary supply after a revision is a major challenge. This study aimed to test the primary stability of a new self-expanding shape memory actuator screw concept with the traditional screw design. The actuator part braces itself against the osseous environment after implantation by heating to body temperature. Thirty screws and twenty-four actuator sheets were manufactured and tested in vertebrae from seven human cadavers in vitro. The pullout force and mechanical work for the pullout were evaluated. Bone quality was determined from μCT. The mean actuator sheet compression force of the used shape memory alloy (SMA) sheets averaged - 8.2 ± 0.6 N. Seven of the SMA screws activated correctly after the implantation, four activated unilaterally only. The pullout force averaged 868 ± 392 N for the standard screws and 828 ± 353 N for the SMA screws. The mechanical work was conducted after the first 100 N, and the loss of strain resistance of 40% of the pullout force averaged 2.2 ± 1.6 Nm for the standard screws, and 1.7 ± 0.9 Nm for the SMA screws. Consequently, the novel concept showed non-inferiority compared with the traditional screw designs. Graphical abstract.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.