Biomechanical Evaluation of a Bipedicular Spinal Fixation System

Balabaud, L.; Gallard, E; Skalli, Wafa; Lassau, Jean-Pierre; Lavaste, F.; Steib, Jean-Paul

doi:10.1097/00007632-200209010-00013

Cited by 15 publications

(7 citation statements)

References 11 publications

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“…The Zebris system has a spatial resolution of 0.1 mm. Several studies have demonstrated good reproducibility, validity and accuracy of this ultrasound based movement analysis sytem (Balabaud et al, 2002;Himmelreich et al, 1998;Malmströ m et al, 2003;Portscher et al, 2000;Vogt and Banzer, 1997).…”

Section: Emg and Three-dimensional Kinematic Datamentioning

confidence: 90%

Test–retest reliability of wavelet – and Fourier based EMG (instantaneous) median frequencies in the evaluation of back and hip muscle fatigue during isometric back extensions

Coorevits

Danneels

Cambier

et al. 2008

Journal of Electromyography and Kinesiology

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Section: Emg and Three-dimensional Kinematic Datamentioning

confidence: 90%

Test–retest reliability of wavelet – and Fourier based EMG (instantaneous) median frequencies in the evaluation of back and hip muscle fatigue during isometric back extensions

Coorevits

Danneels

Cambier

et al. 2008

Journal of Electromyography and Kinesiology

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“…The Zebris system has been used in a number of kinematic studies, and has shown sufficient reproducibility, accuracy and validity (Balabaud et al, 2002;Himmelreich et al, 1998;Malmströ m et al, 2003;Portscher et al, 2000;Vogt and Banzer, 1997).…”

Section: Surface Emg Measurements and Kinematicsmentioning

confidence: 99%

Correlations between short-time Fourier- and continuous wavelet transforms in the analysis of localized back and hip muscle fatigue during isometric contractions

Coorevits¹,

Danneels²,

Cambier³

et al. 2008

Journal of Electromyography and Kinesiology

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“…The mean age at time of death (67.8±8.4 years) and the BMD values of our specimens were far from those of the young scoliotic population for whom this fixation device was primarily intended, but this is a common criticism of in vitro biomechanical studies. Berlemann et al [1] found the mean BMD estimated by DEXA to be between 0.643 and 0.988 g/cm 2 . In a thoraco-lumbar comparative study, Breeze et al [4] found the mean BMD estimated by DEXA to be between 0.297±0.103 g/cm 2 (bicortical screws) and 0.308±0.113 g/cm 2 (unicortical screws).…”

Section: Discussionmentioning

confidence: 99%

“…Strength tests until failure to determine loading tolerance with three selected loading modes 2. A comparative stiffness test to quantify the range of motion between an intact thoracic spine and an injured one with two instrumentations, one of which was the BSF [1] The aim of this study was to investigate the BSF loading tolerance using:…”

mentioning

confidence: 99%

Biomechanical evaluation of a bipedicular spinal fixation device: three different strength tests

Balabaud

Gallard

Skalli

et al. 2003

European Spine Journal

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IntroductionDuring the last 40 years, surgical correction techniques applied to spinal deformity have progressed radically. Harrington [8], Luque [14], and then Cotrel and Dubousset [6] added successive contributions to these advances using different approaches. Harrington [8] chose a simple distraction, correcting deformation essentially in the frontal plane. Luque [14] obtained this same distraction by translating the spine toward the rods, which were fixed by laminar wires. Cotrel and Dubousset [6] introduced a threedimensional correction and fixation system using open hooks and rods. During the last few years, developments Abstract Disadvantages of thoracic posterior implants and developments in rod contouring in situ led to the design of a new spinal implant: the bipedicular spinal fixation device (BSF). The BSF is composed of two bifid hooks linked by a compression transverse connector and inserted into the costo-vertebral and costotransverse joints. The aim of this biomechanical study was to determine the loading tolerance of the BSF. Three strength tests -a pull-out test, a lateral load-to-failure test and a uniaxial transversal compression test to failure -were performed using six human thoracic spines on an Instron testing device. Specimen evaluation consisted of: bone mineral density (BMD) measurement with the dual-energy X-ray absorptiometry (DEXA) technique, cortical thickness measurements and a morphometric study. The mean values for load-to-failure in the posterior and lateral tests were 324 N and 400 N respectively. The mean value of the uniaxial compression was 988 N. The mean BMD estimated by DEXA was 0.557 g/cm 2 . The BSF loading tolerance was compatible with the in situ rod contouring technique requirements when we considered posterior and lateral pull-out tests. The transversal compression test determined the appropriate and efficient BSF tightening force.

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Biomechanical Evaluation of a Bipedicular Spinal Fixation System

Abstract: The BSF construct showed stiffness similar to that of the regular construct, encouraging clinical investigation.

Cited by 15 publications

References 11 publications

Test–retest reliability of wavelet – and Fourier based EMG (instantaneous) median frequencies in the evaluation of back and hip muscle fatigue during isometric back extensions

Test–retest reliability of wavelet – and Fourier based EMG (instantaneous) median frequencies in the evaluation of back and hip muscle fatigue during isometric back extensions

Correlations between short-time Fourier- and continuous wavelet transforms in the analysis of localized back and hip muscle fatigue during isometric contractions

Biomechanical evaluation of a bipedicular spinal fixation device: three different strength tests

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