Histopathologic features of distal tarsal joint cartilage and subchondral bone in ridden and pasture-exercised horses

Tranquille, Carolyne A., Dyson, Sue J., Blunden, Anthony S., Collins, Simon N., Parkin, Tim D. H., Goodship, Allen E., Murray, Rachel C., Tranquille, Dyson and Blunden, Murray (2011) Histopathologic features of distal tarsal joint cartilage and subchondral bone in ridden and pasture-exercised horses. American Journal of Veterinary Research, 72 1: 33-41. doi:10.2460/ajvr.72.1.33


Author Tranquille, Carolyne A.
Dyson, Sue J.
Blunden, Anthony S.
Collins, Simon N.
Parkin, Tim D. H.
Goodship, Allen E.
Murray, Rachel C.
Tranquille, Dyson
Blunden, Murray
Title Histopathologic features of distal tarsal joint cartilage and subchondral bone in ridden and pasture-exercised horses
Journal name American Journal of Veterinary Research   Check publisher's open access policy
ISSN 0002-9645
Publication date 2011-01
Sub-type Article (original research)
DOI 10.2460/ajvr.72.1.33
Volume 72
Issue 1
Start page 33
End page 41
Total pages 9
Place of publication Schaumburg, IL, U.S.A.
Publisher American Veterinary Medical Association
Collection year 2012
Language eng
Formatted abstract
Objective-
To determine whether histopathologic characteristics of the osteochondral units of equine distal tarsal joints were associated with exercise history in horses without lameness.

Sample Population-

30 cadaver tarsi from horses without lameness and with known exercise history were separated into 3 groups: nonridden, pasture exercise (group P); lowintensity, ridden exercise (group L); and high-intensity, elite competition exercise (group E).

Procedures-

Standardized sites from the centrodistal and tarsometatarsal joints underwent histologic preparation. A grading system was adapted to describe location, depth, and shape of lesions; cellular arrangement; organization at cartilage and subchondral bone (SCB) junctions; and organization of SCB. A high score signified a more severe pathological change than a low score. Exercise groups were compared by calculation of Spearman rank correlations.

Results-
In the centrodistal joint, lesions were present in groups L and E but only medially. Cellular arrangement scores were higher at the dorsomedial location in group P than in groups L and E. Groups L and E had higher scores than group P for the organization of the cartilage, SCB junctions, and SCB, with higher scores at the dorsomedial location. In the tarsometatarsal joint, lesions were evident across the whole joint surface, with more severe lesions located laterally in all 3 groups. Overall, group E had higher scores for cellular arrangement and SCB organization than groups P and L.

Conclusions and Clinical Relevance-

Ridden exercise may increase the risk of osteochondral lesions at distal tarsal sites predisposed to osteoarthritis relative to the risk with nonridden exercise. (Am J Vet Res 2011;72:33-41).
Keyword Articular-cartilage
Calcified cartilage
Icelandic horses
Chip fractures
Equine
Thickness
Carpus
Osteoarthritis
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Veterinary Science Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 4 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 13 Mar 2011, 00:15:44 EST