File Download

There are no files associated with this item.

Supplementary

Conference Paper: Biomechanical Rationale for Varia‐Tions in the Prevalence of Low Back Pain and Schmorl's Nodes Found in Different Patterns of Multi‐Level Disc Gegeneration

TitleBiomechanical Rationale for Varia‐Tions in the Prevalence of Low Back Pain and Schmorl's Nodes Found in Different Patterns of Multi‐Level Disc Gegeneration
Authors
Issue Date2014
PublisherThe International Society for the Study of the Lumbar Spine (ISSLS).
Citation
The 41st Annual Meeting of the International Society for the Study of the Lumbar Spine (ISSLS), Seoul, Korea, 3-7 June 2014. In the Abstract Book of the 41st Annual Meeting of the International Society for the Study of the Lumbar Spine (ISSLS), 2014, p. 123-124, abstract no. GP34 How to Cite?
AbstractINTRODUCTION: Previously published re‐ search has shown that contiguous multi‐ level disc degeneration (CMDD) has been noted to significantly increase the likelihood of severe low back pain in comparison to skipped levels of disc degeneration (SLDD). Clinical studies have also shown that Schmorl's nodes are more common in pat‐ terns of SLDD than with CMDD and that such nodes increase the likelihood of disc degeneration. As such, the purpose of this study was to utilize a nonlinear finite ele‐ ment model of the lumbar spine to investi‐ gate various patterns of multi‐level disc degeneration and to investigate correla‐ tions with clinical incidence of low back pain and Schmorl's nodes. METHODS: A previously validated hexahe‐ dral finite element model of a T12‐S1 lum‐ bar spine was adapted to simulate the 13 cases shown in the figure. The degenerated discs were modeled based on published material properties. Biomechanics data for each SLDD and CMDD case were compared against each other, against the single‐level degeneration cases, and against the control (non‐degenerated) case. These results were also compared with data from a large co‐ hort of patients (the Hong Kong Study) re‐ porting low back pain and MRI prevalence of Schmorl’s nodes. RESULTS: The finite element study indicated that CMDD resulted in higher ligament stresses, pedicle stresses, and facet contact forces as compared to the SLDD conditions. Interestingly, comparisons of sequential patterns of disc degeneration (control vs single level degeneration vs contiguous 2 level degeneration vs skipped level 3 level degeneration) showed that the addition of a skipped‐level degenerated disc to a con‐ tiguous level degenerated case actually de‐ creased stresses. Vertebral strain energy was also shown to be a possible predictor in the development of Schmorl’s nodes. DISCUSSION: These results provide insight into the variation in clinical studies of symp‐ tomatic and asymptomatic multi‐level disc degeneration.
DescriptionGeneral Poster
Persistent Identifierhttp://hdl.handle.net/10722/204392

 

DC FieldValueLanguage
dc.contributor.authorVon Forell, GAen_US
dc.contributor.authorStephens, TKen_US
dc.contributor.authorNelson, TGen_US
dc.contributor.authorSamartzis, Den_US
dc.contributor.authorBowden, AEen_US
dc.date.accessioned2014-09-19T22:41:35Z-
dc.date.available2014-09-19T22:41:35Z-
dc.date.issued2014en_US
dc.identifier.citationThe 41st Annual Meeting of the International Society for the Study of the Lumbar Spine (ISSLS), Seoul, Korea, 3-7 June 2014. In the Abstract Book of the 41st Annual Meeting of the International Society for the Study of the Lumbar Spine (ISSLS), 2014, p. 123-124, abstract no. GP34en_US
dc.identifier.urihttp://hdl.handle.net/10722/204392-
dc.descriptionGeneral Poster-
dc.description.abstractINTRODUCTION: Previously published re‐ search has shown that contiguous multi‐ level disc degeneration (CMDD) has been noted to significantly increase the likelihood of severe low back pain in comparison to skipped levels of disc degeneration (SLDD). Clinical studies have also shown that Schmorl's nodes are more common in pat‐ terns of SLDD than with CMDD and that such nodes increase the likelihood of disc degeneration. As such, the purpose of this study was to utilize a nonlinear finite ele‐ ment model of the lumbar spine to investi‐ gate various patterns of multi‐level disc degeneration and to investigate correla‐ tions with clinical incidence of low back pain and Schmorl's nodes. METHODS: A previously validated hexahe‐ dral finite element model of a T12‐S1 lum‐ bar spine was adapted to simulate the 13 cases shown in the figure. The degenerated discs were modeled based on published material properties. Biomechanics data for each SLDD and CMDD case were compared against each other, against the single‐level degeneration cases, and against the control (non‐degenerated) case. These results were also compared with data from a large co‐ hort of patients (the Hong Kong Study) re‐ porting low back pain and MRI prevalence of Schmorl’s nodes. RESULTS: The finite element study indicated that CMDD resulted in higher ligament stresses, pedicle stresses, and facet contact forces as compared to the SLDD conditions. Interestingly, comparisons of sequential patterns of disc degeneration (control vs single level degeneration vs contiguous 2 level degeneration vs skipped level 3 level degeneration) showed that the addition of a skipped‐level degenerated disc to a con‐ tiguous level degenerated case actually de‐ creased stresses. Vertebral strain energy was also shown to be a possible predictor in the development of Schmorl’s nodes. DISCUSSION: These results provide insight into the variation in clinical studies of symp‐ tomatic and asymptomatic multi‐level disc degeneration.-
dc.languageengen_US
dc.publisherThe International Society for the Study of the Lumbar Spine (ISSLS).-
dc.relation.ispartofAnnual Meeting of the International Society for the Study of the Lumbar Spine (ISSLS)en_US
dc.titleBiomechanical Rationale for Varia‐Tions in the Prevalence of Low Back Pain and Schmorl's Nodes Found in Different Patterns of Multi‐Level Disc Gegenerationen_US
dc.typeConference_Paperen_US
dc.identifier.emailSamartzis, D: dspine@hku.hken_US
dc.identifier.authoritySamartzis, D=rp01430en_US
dc.identifier.hkuros238047en_US
dc.identifier.spage123, abstract no. GP34-
dc.identifier.epage124, abstract no. GP34-
dc.publisher.placeSeoul, Koreaen_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats