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A new in vitro spine test rig to track multiple vertebral motions under physiological conditions


Beckmann, Agnes; Herren, Christian; Mundt, Marion; Siewe, Jan; Kobbe, Philipp; Sobottke, Rolf; Pape, Hans-Christoph; Stoffel, Marcus; Markert, Bernd (2017). A new in vitro spine test rig to track multiple vertebral motions under physiological conditions. Biomedizinische Technik. Biomedical engineering, 0(0):Epub ahead of print.

Abstract

In vitro pure moment spine tests are commonly used to analyse surgical implants in cadaveric models. Most of the tests are performed at room temperature. However, some new dynamic instrumentation devices and soft tissues show temperature-dependent material properties. Therefore, the aim of this study is to develop a new test rig, which allows applying pure moments on lumbar spine specimens in a vapour-filled chamber at body temperature. As no direct sight is given in the vapour-filled closed chamber, a magnetic tracking (MT) system with implantable receivers was used. Four human cadaveric lumbar spines (L2-L5) were tested in a vapour atmosphere at body temperature with a native and rigid instrumented group. In conclusion, the experimental set-up allows vertebral motion tracking of multiple functional spinal units (FSUs) in a moisture environment at body temperature.

Abstract

In vitro pure moment spine tests are commonly used to analyse surgical implants in cadaveric models. Most of the tests are performed at room temperature. However, some new dynamic instrumentation devices and soft tissues show temperature-dependent material properties. Therefore, the aim of this study is to develop a new test rig, which allows applying pure moments on lumbar spine specimens in a vapour-filled chamber at body temperature. As no direct sight is given in the vapour-filled closed chamber, a magnetic tracking (MT) system with implantable receivers was used. Four human cadaveric lumbar spines (L2-L5) were tested in a vapour atmosphere at body temperature with a native and rigid instrumented group. In conclusion, the experimental set-up allows vertebral motion tracking of multiple functional spinal units (FSUs) in a moisture environment at body temperature.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Department of Trauma Surgery
Dewey Decimal Classification:610 Medicine & health
Uncontrolled Keywords:biomechanics; body temperature; implant; in vitro; kinematics; spine
Language:English
Date:27 April 2017
Deposited On:18 Oct 2017 15:21
Last Modified:13 Feb 2018 02:01
Publisher:De Gruyter
ISSN:0013-5585
Publisher DOI:https://doi.org/10.1515/bmt-2016-0173
PubMed ID:28448270

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