Primary stability of the Activ L® intervertebral disc prosthesis in cadaver bone and comparison of the keel and spike anchoring concept
- \(\bf Background\) High primary stability is the key prerequisite for safe osseointegration of cementless intervertebral disc prostheses. The aim of our study was to determine the primary stability of intervertebral disc prostheses with two different anchoring concepts – keel and spike anchoring. \(\bf Methods\) Ten ActivL intervertebral disc prostheses (5 x keel anchoring, 5 x spike anchoring) implanted in human cadaver lumbar spine specimens were tested in a spine movement simulator. Axial load flexion, extension, left and right bending and axial rotation motions were applied on the lumbar spine specimens through a defined three-dimensional movement program following ISO 2631 and ISO/CD 18192-1.3 standards. Tri-dimensional micromotions of the implants were measured for both anchor types and compared using Student’s T-test for significance after calculating 95 % confidence intervals. \(\bf Results\) In the transverse axis, the keel anchoring concept showed statistically significant (\(\it p\) < 0.05) lower mean values of micromotions compared to the spike anchoring concept. The highest micromotion values for both types were observed in the longitudinal axis. In no case the threshold of 200 micrometers was exceeded. \(\bf Conclusions\) Both fixation systems fulfill the required criteria of primary stability. Independent of the selected anchorage type an immediate postoperative active mobilization doesn’t compromise the stability of the prostheses.
Author: | Christoph von Schulze PellengahrGND, Wolfram TeskeGND, Saurabh KapoorGND, Alexander KleinGND, Bernd WegenerGND, Andreas BüttnerGND, Matthias Helmut LahnerGND |
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URN: | urn:nbn:de:hbz:294-91700 |
DOI: | https://doi.org/10.1186/s12891-021-04544-7 |
Parent Title (English): | BMC Musculoskeletal disorders |
Publisher: | BioMed Central LtD |
Place of publication: | London |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2022/07/28 |
Date of first Publication: | 2021/11/08 |
Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
Tag: | Open Access Fonds Aesculap ActivL; Anchoring concept; Keel; Micromotions; Primary stability of intervertebral disc prosthesis; Spikes |
Volume: | 22 |
Issue: | Artikel 934 |
First Page: | 934-1 |
Last Page: | 934-9 |
Note: | Article Processing Charge funded by the Open Access Publication Fund of Ruhr-Universität Bochum. |
Institutes/Facilities: | Auguste Viktoria Klinik, Universitätsklinik für Allgemeine Orthopädie, Rheumaorthopädie und Endoprothetik, Bad Oeynhausen |
Dewey Decimal Classification: | Technik, Medizin, angewandte Wissenschaften / Medizin, Gesundheit |
open_access (DINI-Set): | open_access |
Licence (German): | Creative Commons - CC BY 4.0 - Namensnennung 4.0 International |