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

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. Ten ActivL interverte...

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Bibliographic Details
Published in:BMC musculoskeletal disorders 2021-11, Vol.22 (1), p.934-934, Article 934
Main Authors: von Schulze Pellengahr, Christoph, Teske, Wolfram, Kapoor, Saurabh, Klein, Alexander, Wegener, Bernd, Büttner, Andreas, Lahner, Matthias
Format: Article
Language:English
Subjects:
Aesculap ActivL
Anchoring concept
Back surgery
Biomechanical Phenomena
Biomechanics
Cadaver
Design
Experiments
Humans
Intervertebral Disc
Intervertebral discs
Keel
Lumbar Vertebrae - surgery
Mechanical properties
Methods
Micromotions
Musculoskeletal diseases
Orthopedic implants
Orthopedic surgery
Osseointegration
Physiology
Polyethylene
Primary stability of intervertebral disc prosthesis
Prostheses
Prostheses and Implants
Prosthetics
Range of Motion, Articular
Sensors
Spikes
Spine (lumbar)
Statistical analysis
Testing
Transplants & implants
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Summary: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. 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. In the transverse axis, the keel anchoring concept showed statistically significant (p 
ISSN:1471-2474
1471-2474
DOI:10.1186/s12891-021-04544-7