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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Adam, Clayton
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2020The effect of vertebral body stapling on spine biomechanics and structure using a bovine modelcitations
- 2014Gravity-induced coronal plane joint moments in the adolescent scoliotic spine
- 2014Segmental torso masses in adolescent idiopathic scoliosiscitations
- 2014The effect of repeated loading and freeze - thaw cycling on immature bovine thoracic motion segment stiffnesscitations
- 2014The effect of intervertebral staple insertion on bovine spine segment stiffness
- 2014Intervertebral staple grading system with micro-CT
- 2013Segmental torso masses and gravity-induced coronal plane joint moments in adolescent idiopathic scoliosis
- 2013The effect of testing protocol on immature bovine thoracic spine segment stiffness
- 2013Segmental torso masses and coronal plane joint torques in the adolescent scoliotic spine
- 2010Fusionless scoliosis correction using shape memory alloy staples
- 2009Development of a biaxial compression device for biological samples: preliminary experimental results for a closed cell foamcitations
- 2006Development of a method to validate computer models of the spine for scoliosis correction surgery simulation
- 2002Finite element analysis of high strain rate superplastic forming (SPF) of Al–Ti alloyscitations
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document
Gravity-induced coronal plane joint moments in the adolescent scoliotic spine
Abstract
INTRODUCTIONCalculating segmental (vertebral level-by-level) torso masses in Adolescent Idiopathic Scoliosis (AIS) patients allows the gravitational loading on the scoliotic spine during relaxed standing to be estimated.METHODSExisting low dose CT scans were used to calculate vertebral level-by-level torso masses and joint moments occurring in the spine for a group of female AIS patients with right-sided thoracic curves.Image processing software, ImageJ (v1.45 NIH USA) was used to reconstruct the torso segments and subsequently measure the torso volume and mass corresponding to each vertebral level.Body segment masses for the head, neck and arms were taken from published anthropometric data. Intervertebral joint moments at each vertebral level were found by summing each of the torso segment masses above the required joint and multiplying it by the perpendicular distance to the centre of the disc.RESULTS AND DISCUSSIONTwenty patients were included in this study with a mean age of 15.0±2.7 years and a mean Cobb angle 52±5.9°. The mean total trunk mass, as a percentage of total body mass, was 27.8 (SD 0.5) %. Mean segmental torso mass increased inferiorly from 0.6kg at T1 to 1.5kg at L5. The coronal plane joint moments during relaxed standing were typically 5-7Nm at the apex of the curve (Figure 1), with the highest apex joint of 7Nm.CT scans were performed in the supine position and curve magnitudes are known to be 7-10° smaller than those measured in standing [1]. Therefore joint moments produced by gravity will be greater than those calculated here.CONCLUSIONSCoronal plane joint moments as high as 7Nm can occur during relaxed standing in scoliosis patients, which may help to explain the mechanics of AIS progression. The body mass distributions calculated in this study can be used to estimate joint moments derived using other imaging modalities such as MRI and subsequently determine if a relationship exists between joint moments and progressive vertebral deformity.