Primary stability of the Activ L® intervertebral disc prosthesis in cadaver bone and comparison of the keel and spike anchoring concept

Abstract 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. M...

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Autores principales:	Christoph von Schulze Pellengahr, Wolfram Teske, Saurabh Kapoor, Alexander Klein, Bernd Wegener, Andreas Büttner, Matthias Lahner
Formato:	article
Lenguaje:	EN
Publicado:	BMC 2021
Materias:	Primary stability of intervertebral disc prosthesis Micromotions Aesculap ActivL Anchoring concept Keel Spikes Diseases of the musculoskeletal system RC925-935
Acceso en línea:	https://doaj.org/article/f998830914ce4518a0588d8dbacbab57
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spelling	oai:doaj.org-article:f998830914ce4518a0588d8dbacbab572021-11-14T12:28:25ZPrimary stability of the Activ L® intervertebral disc prosthesis in cadaver bone and comparison of the keel and spike anchoring concept10.1186/s12891-021-04544-71471-2474https://doaj.org/article/f998830914ce4518a0588d8dbacbab572021-11-01T00:00:00Zhttps://doi.org/10.1186/s12891-021-04544-7https://doaj.org/toc/1471-2474Abstract 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. 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. Results In the transverse axis, the keel anchoring concept showed statistically significant (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. 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.Christoph von Schulze PellengahrWolfram TeskeSaurabh KapoorAlexander KleinBernd WegenerAndreas BüttnerMatthias LahnerBMCarticlePrimary stability of intervertebral disc prosthesisMicromotionsAesculap ActivLAnchoring conceptKeelSpikesDiseases of the musculoskeletal systemRC925-935ENBMC Musculoskeletal Disorders, Vol 22, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Primary stability of intervertebral disc prosthesis Micromotions Aesculap ActivL Anchoring concept Keel Spikes Diseases of the musculoskeletal system RC925-935
spellingShingle	Primary stability of intervertebral disc prosthesis Micromotions Aesculap ActivL Anchoring concept Keel Spikes Diseases of the musculoskeletal system RC925-935 Christoph von Schulze Pellengahr Wolfram Teske Saurabh Kapoor Alexander Klein Bernd Wegener Andreas Büttner Matthias Lahner Primary stability of the Activ L® intervertebral disc prosthesis in cadaver bone and comparison of the keel and spike anchoring concept
description	Abstract 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. 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. Results In the transverse axis, the keel anchoring concept showed statistically significant (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. 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.
format	article
author	Christoph von Schulze Pellengahr Wolfram Teske Saurabh Kapoor Alexander Klein Bernd Wegener Andreas Büttner Matthias Lahner
author_facet	Christoph von Schulze Pellengahr Wolfram Teske Saurabh Kapoor Alexander Klein Bernd Wegener Andreas Büttner Matthias Lahner
author_sort	Christoph von Schulze Pellengahr
title	Primary stability of the Activ L® intervertebral disc prosthesis in cadaver bone and comparison of the keel and spike anchoring concept
title_short	Primary stability of the Activ L® intervertebral disc prosthesis in cadaver bone and comparison of the keel and spike anchoring concept
title_full	Primary stability of the Activ L® intervertebral disc prosthesis in cadaver bone and comparison of the keel and spike anchoring concept
title_fullStr	Primary stability of the Activ L® intervertebral disc prosthesis in cadaver bone and comparison of the keel and spike anchoring concept
title_full_unstemmed	Primary stability of the Activ L® intervertebral disc prosthesis in cadaver bone and comparison of the keel and spike anchoring concept
title_sort	primary stability of the activ l® intervertebral disc prosthesis in cadaver bone and comparison of the keel and spike anchoring concept
publisher	BMC
publishDate	2021
url	https://doaj.org/article/f998830914ce4518a0588d8dbacbab57
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Primary stability of the Activ L® intervertebral disc prosthesis in cadaver bone and comparison of the keel and spike anchoring concept

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