Document Detail

The multidirectional bending properties of the human lumbar intervertebral disc.
MedLine Citation:
PMID:  16651218     Owner:  NLM     Status:  MEDLINE    
BACKGROUND CONTEXT: While the biomechanical properties of the isolated intervertebral disc have been well studied in the three principal anatomic directions of flexion/extension, axial rotation, and lateral bending, there is little data on the properties in the more functional directions that are combinations of these principal anatomic directions. PURPOSE: To determine the bending flexibility, range of motion (ROM), and neutral zone (NZ) of the human lumbar disc in multiple directions and to determine if the values about the combined moment axes can be predicted from the values about principal moment axes. STUDY DESIGN/SETTING: Three-dimensional biomechanical analysis of the elastic bending properties of human lumbar discs about principal and combined moment axes. METHODS: Pure, unconstrained moments were applied about multiple axes. The bending properties (flexibility, ROM, and NZ) of isolated lumbar discs (n=4 for L2/L3 and n=3 for L4/L5) were determined in the six principal directions and in 20 combined directions. The experimental values were compared with those predicted from the linear combination of the six principal moment axes. RESULTS: The maximum and minimum values of the biomechanical properties were found at the principal moment axes. Among combined moment axes, ROM and NZ (but not flexibility) values were predicted from the principal moment axis values. CONCLUSIONS: The principal moment axes coincide with the primary mechanical axes of the intervertebral disc and demonstrate significant differences in direction for values of flexibility, ROM, and NZ. Not all combined moment axis values can be predicted from principal moment axis values.
David Spenciner; David Greene; James Paiva; Mark Palumbo; Joseph Crisco
Related Documents :
24610718 - Silk-pectin hydrogel with superior mechanical properties, biodegradability, and biocomp...
24146008 - Mechanochemical mechanism for reaction of aluminium nano- and micrometre-scale particles.
24025618 - Kibble-zurek scaling and string-net coarsening in topologically ordered systems.
23846828 - Linking climate change to population cycles of hares and lynx.
18850798 - Time-dependent response theory and nonequilibrium free-energy relations.
22501988 - Echolocation beam shape and focusing in the false killer whale (pseudorca crassidens).
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The spine journal : official journal of the North American Spine Society     Volume:  6     ISSN:  1529-9430     ISO Abbreviation:  Spine J     Publication Date:    2006 May-Jun
Date Detail:
Created Date:  2006-05-02     Completed Date:  2006-07-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  101130732     Medline TA:  Spine J     Country:  United States    
Other Details:
Languages:  eng     Pagination:  248-57     Citation Subset:  IM    
Department of Orthopaedics, Brown Medical School/Rhode Island Hospital, Providence, RI 02903, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Intervertebral Disk / physiology*
Lumbar Vertebrae / physiology*
Middle Aged
Range of Motion, Articular*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Range of motion and adjacent level degeneration after lumbar total disc replacement.
Next Document:  Disc arthroplasty design influences intervertebral kinematics and facet forces.