Photoelastic stress analysis of strain patterns in equine hooves after four-point trimming.
Am J Vet Res
; 62(4): 467-73, 2001 Apr.
Article
em En
| MEDLINE
| ID: mdl-11327449
ABSTRACT
OBJECTIVE:
To evaluate changes in strain patterns in normal equine hooves following 4-point trimming, using photoelastic stress analysis. SAMPLE POPULATION 15 equine front limbs with normal hoof configuration. PROCEDURE Limbs were disarticulated at the carpometacarpal joint. Weight-bearing surfaces of each hoof were trimmed level to ensure 100% ground contact. Hoof walls were coated with a custom-made strain-sensitive plastic, and limbs were loaded to a third of body weight. Using a polariscope, strain distribution, magnitudes, and directions were evaluated in level hooves as well as before and after standardized 4-point trimming. Repeated-measures ANOVA was used to compare strain magnitudes and directions before and after trimming.RESULTS:
In leveled specimens, strain fields were symmetrically distributed above the heels and at quarter-toe junctions along a line between the middle and distal thirds of the hoof wall. After 4-point trimming, strain epicenters localized above the contact points, whereas strain magnitudes significantly increased by approximately 50%. Decreasing contact area by 50% resulted in an additional significant increase (32%) in strain magnitude. Trimming did not have a significant effect on strain orientations. CONCLUSION AND CLINICAL RELEVANCE This study documents that 4-point trimming results in strain concentration above the hoof contact points and that strain magnitude is dependent on contact area.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Casco e Garras
/
Cavalos
Limite:
Animals
Idioma:
En
Revista:
Am J Vet Res
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Estados Unidos