| Three-dimensional morphometry of strained bovine periodontal ligament using synchrotron radiation-based tomography. | |
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MedLine Citation:
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PMID: 20557399 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The periodontal ligament (PDL) is a highly vascularized soft connective tissue. Previous studies suggest that the viscous component of the mechanical response may be explained by the deformation-induced collapse and expansion of internal voids (i.e. chiefly blood vessels) interacting with liquids (i.e. blood and interstitial fluids) flowing through the pores. In the present work we propose a methodology by means of which the morphology of the PDL vascular plexus can be monitored at different levels of compressive and tensile strains. To this end, 4-mm-diameter cylindrical specimens, comprising layers of bone, PDL and dentin covered by cementum, were strained at stretch ratios ranging from lambda = 0.6 to lambda = 1.4 and scanned using synchrotron radiation-based computer tomography. It was concluded that: (1) the PDL vascular network is layered in two distinct planes of blood vessels (BVs): an inner layer (close to the tooth), in which the BVs run in apico-coronal direction, and an outer layer (close to the alveolar bone), in which the BVs distribution is more diffuse; (2) during tension and compression, the porosity tissue is kept fairly constant; (3) mechanical straining induces important changes in BV diameters, possibly modifying the permeability of the PDL and thus contributing to the viscous component of the viscoelastic response observed under compressive forces. |
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Authors:
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Marzio Bergomi; Joël Cugnoni; H W Anselm Wiskott; Philipp Schneider; Marco Stampanoni; John Botsis; Urs C Belser |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-06-14 |
Journal Detail:
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Title: Journal of anatomy Volume: 217 ISSN: 1469-7580 ISO Abbreviation: J. Anat. Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-07-16 Completed Date: 2011-01-05 Revised Date: 2012-09-25 |
Medline Journal Info:
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Nlm Unique ID: 0137162 Medline TA: J Anat Country: England |
Other Details:
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Languages: eng Pagination: 126-34 Citation Subset: IM |
Affiliation:
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Laboratoire de mécanique appliquée et d'analyse de fiabilité, Ecole polytechnique fédérale de Lausanne (EPFL), Lausanne, Switzerland. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Blood Vessels / physiology, ultrasonography Cattle Microcirculation / physiology Periodontal Ligament / anatomy & histology*, blood supply, physiology, radiography Porosity Specimen Handling / methods Stress, Mechanical Synchrotrons Tomography, X-Ray Computed / methods |
| Comments/Corrections | |
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