Premium
Are there radiologically identifiable prodromal changes in T horoughbred racehorses with parasagittal fractures of the proximal phalanx?
Author(s) -
Smith M. R. W.,
Wright I. M.
Publication year - 2014
Publication title -
equine veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 87
eISSN - 2042-3306
pISSN - 0425-1644
DOI - 10.1111/evj.12093
Subject(s) - medicine , phalanx , radiography , etiology , proximal phalanx , stress fractures , bone pathology , radiological weapon , anatomy , surgery , pathology
Summary Reasons for performing study Fractures of the proximal phalanx are generally considered to result from monotonic supraphysiological loads, but radiological observations from clinical cases suggest there may be a stress‐related aetiology. Objectives To determine whether there are radiologically identifiable prodromal changes in T horoughbred racehorses with confirmed parasagittal fractures of the proximal phalanx. Study design Retrospective cross‐sectional study. Methods Case records and radiographs of T horoughbred racehorses with parasagittal fractures of the proximal phalanx were analysed. Thickness of the subchondral bone plate was measured in fractured and contralateral limbs, and additional radiological features consistent with prodromal fracture pathology documented. Results The subchondral bone plate was significantly thicker in affected than in contralateral limbs. Evidence of additional prodromal fracture pathology was observed in 15/110 (14%) limbs with parasagittal fractures, and in 4% of contralateral limbs. Conclusions The results of this study are not consistent with monotonic loading as a cause of fracture in at least a proportion of cases, but suggest a stress‐related aetiology. Increased thickness of the subchondral bone plate may reflect (failed) adaptive changes that precede fracture. Potential relevance Better understanding of the aetiology of fractures of the proximal phalanx may help develop strategies to reduce the risk of fracture. The S ummary is available in C hinese – see S upporting information.