Document Detail

Changes in endplate vascularity after an outer anulus tear in the sheep.
MedLine Citation:
PMID:  1523489     Owner:  NLM     Status:  MEDLINE    
In 31 2-year-old sheep, a 5-mm deep cut was made parallel to the end plates in the left anterolateral anulus fibrosus of 3 randomly selected lumbar intervertebral discs. At 2 months, the area of the end plate occupied by blood vessels on the left (operated) side had increased significantly (P less than 0.05) in the cranial end plate to 9.94%, and to 9.39% in the caudal end plate, compared with nonoperated values of 5.17% (cranial) and 5.87% (caudal). One year after operation, these elevated values had diminished significantly (P less than 0.05) to 7.92% (cranial) and 7.13% (caudal), and continued to decline progressively to 7.48% (cranial) and 6.88% (caudal) by 2 years. In contrast, no significant differences were found on the right (nonoperated) side of the discs. Thus, there was an early proliferation of vascular channels in the end plate in the vicinity of the experimental anular lesion, but not on the nonoperated side of the same disc. Thereafter, the end plate vascularity progressively diminished toward a normal level.
R J Moore; O L Osti; B Vernon-Roberts; R D Fraser
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Spine     Volume:  17     ISSN:  0362-2436     ISO Abbreviation:  Spine     Publication Date:  1992 Aug 
Date Detail:
Created Date:  1992-10-13     Completed Date:  1992-10-13     Revised Date:  2009-07-09    
Medline Journal Info:
Nlm Unique ID:  7610646     Medline TA:  Spine (Phila Pa 1976)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  874-8     Citation Subset:  IM    
Division of Tissue Pathology, Institute of Medical and Veterinary Science, Adelaide, Australia.
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MeSH Terms
Disease Models, Animal
Intervertebral Disk / blood supply*,  injuries,  pathology
Spinal Diseases / pathology*

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

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