In vitro load measurement using an instrumented spinal fixation device

Antonius Rohlmann; L. H. Riley; G. Bergmann; F. Graichen

doi:10.1016/1350-4533(95)00087-9

In vitro load measurement using an instrumented spinal fixation device

Antonius Rohlmann, L. H. Riley, G. Bergmann, F. Graichen

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

An AO spinal fixateur interne was modified to study the effects of a corpectomy on implant performance. A hermetically sealed cartridge containing strain gauges and an inductively powered telemetry unit was integrated into the threaded portion of the original implant. Five cadaveric spines were instrumented with the modified implant spanning a single lumbar vertebra. The spines were tested in axial compression, torsion, flexion, extension and lateral bending. Measurements of the three forces and moments within the implant were performed in the intact spine and repeated following a corpectomy and corpectomy plus complete posterior ligamentous injury. The bending moment increased following corpectomy in all testing modes. The largest increase was in the flexion bending moment, which increased from 155 Nmm to 3328 Nmm following corpectomy.

Original language	English (US)
Pages (from-to)	485-488
Number of pages	4
Journal	Medical Engineering and Physics
Volume	18
Issue number	6
DOIs	https://doi.org/10.1016/1350-4533(95)00087-9
State	Published - Sep 1996
Externally published	Yes

Keywords

Corpectomy
Internal fixator
Load measurement
Spine
Telemetry

ASJC Scopus subject areas

Biophysics
Biomedical Engineering

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10.1016/1350-4533(95)00087-9

Cite this

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title = "In vitro load measurement using an instrumented spinal fixation device",

abstract = "An AO spinal fixateur interne was modified to study the effects of a corpectomy on implant performance. A hermetically sealed cartridge containing strain gauges and an inductively powered telemetry unit was integrated into the threaded portion of the original implant. Five cadaveric spines were instrumented with the modified implant spanning a single lumbar vertebra. The spines were tested in axial compression, torsion, flexion, extension and lateral bending. Measurements of the three forces and moments within the implant were performed in the intact spine and repeated following a corpectomy and corpectomy plus complete posterior ligamentous injury. The bending moment increased following corpectomy in all testing modes. The largest increase was in the flexion bending moment, which increased from 155 Nmm to 3328 Nmm following corpectomy.",

keywords = "Corpectomy, Internal fixator, Load measurement, Spine, Telemetry",

author = "Antonius Rohlmann and Riley, {L. H.} and G. Bergmann and F. Graichen",

note = "Funding Information: Supported in part by a grant Research Society.",

year = "1996",

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T1 - In vitro load measurement using an instrumented spinal fixation device

AU - Rohlmann, Antonius

AU - Riley, L. H.

AU - Bergmann, G.

AU - Graichen, F.

N1 - Funding Information: Supported in part by a grant Research Society.

PY - 1996/9

Y1 - 1996/9

N2 - An AO spinal fixateur interne was modified to study the effects of a corpectomy on implant performance. A hermetically sealed cartridge containing strain gauges and an inductively powered telemetry unit was integrated into the threaded portion of the original implant. Five cadaveric spines were instrumented with the modified implant spanning a single lumbar vertebra. The spines were tested in axial compression, torsion, flexion, extension and lateral bending. Measurements of the three forces and moments within the implant were performed in the intact spine and repeated following a corpectomy and corpectomy plus complete posterior ligamentous injury. The bending moment increased following corpectomy in all testing modes. The largest increase was in the flexion bending moment, which increased from 155 Nmm to 3328 Nmm following corpectomy.

AB - An AO spinal fixateur interne was modified to study the effects of a corpectomy on implant performance. A hermetically sealed cartridge containing strain gauges and an inductively powered telemetry unit was integrated into the threaded portion of the original implant. Five cadaveric spines were instrumented with the modified implant spanning a single lumbar vertebra. The spines were tested in axial compression, torsion, flexion, extension and lateral bending. Measurements of the three forces and moments within the implant were performed in the intact spine and repeated following a corpectomy and corpectomy plus complete posterior ligamentous injury. The bending moment increased following corpectomy in all testing modes. The largest increase was in the flexion bending moment, which increased from 155 Nmm to 3328 Nmm following corpectomy.

KW - Corpectomy

KW - Internal fixator

KW - Load measurement

KW - Spine

KW - Telemetry

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In vitro load measurement using an instrumented spinal fixation device

Abstract

Keywords

ASJC Scopus subject areas

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