Patient-specific spinal stiffness in AIS: a preoperative and noninvasive method.

Berger, Steve; Elias de Oliveira, Marcelo; Schumann, Steffen; Schneider, Jacques; Studer, Daniel; Hasler, Carol; Zheng, Guoyan; Büchler, Philippe (2015). Patient-specific spinal stiffness in AIS: a preoperative and noninvasive method. European spine journal, 24(2), pp. 249-255. Springer 10.1007/s00586-014-3623-1

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INTRODUCTION The clinical tests currently used to assess spinal biomechanics preoperatively are unable to assess true mechanical spinal stiffness. They rely on spinal displacement without considering the force required to deform a patient's spine. We propose a preoperative method for noninvasively quantifying the three-dimensional patient-specific stiffness of the spines of adolescent idiopathic scoliosis patients. METHODS The technique combines a novel clinical test with numerical optimization of a finite element model of the patient's spine. RESULTS A pilot study conducted on five patients showed that the model was able to provide accurate 3D reconstruction of the spine's midline and predict the spine's stiffness for each patient in flexion, bending, and rotation. Statistically significant variation of spinal stiffness was observed between the patients. CONCLUSION This result confirms that spinal biomechanics is patient-specific, which should be taken into consideration to individualize surgical treatment.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Institute for Surgical Technology & Biomechanics ISTB

UniBE Contributor:

Berger, Steve; Elias de Oliveira, Marcelo; Schumann, Steffen; Zheng, Guoyan and Büchler, Philippe

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

0940-6719

Publisher:

Springer

Language:

English

Submitter:

Philippe Büchler

Date Deposited:

17 Dec 2014 15:19

Last Modified:

11 Nov 2015 13:52

Publisher DOI:

10.1007/s00586-014-3623-1

PubMed ID:

25326848

BORIS DOI:

10.7892/boris.60906

URI:

https://boris.unibe.ch/id/eprint/60906

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