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Regional variation in the flexural properties of the equine hoof wall

Published online by Cambridge University Press:  01 November 2008

A M Goodman  and
L Haggis
A M Goodman*
Affiliation:
Department of Forensic and Biomedical Sciences, University of Lincoln, Brayford Pool, LincolnLN6 7TS, UK
L Haggis
Affiliation:
Department of Biological Sciences, University of Lincoln, Riseholme Park, Riseholme, LincolnLN2 2LG, UK
*
*Corresponding author: [email protected]
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Abstract

The equine hoof wall is a hard, keratinous structure that transmits forces generated when the hoof connects the ground to the skeleton of the horse. During locomotion the hoof capsule is known to deform, resulting in an inward curvature of the dorsal wall and expansion of the heels. However, while researchers have studied the tensile and compressive properties, there is a lack of data on the flexural properties of the hoof wall in different locations around the hoof capsule. In this study, the flexural properties and hydration status of the hoof wall were investigated in two orthogonal directions, in different locations around the hoof capsule. The hoof was divided into three regions: the dorsal-most aspect (toe), the medial and lateral regions (quarters) and the heels caudally. Beams were cut both perpendicular (transverse) and parallel (longitudinal) to the orientation of the tubules. Differences in the mechanical properties were then investigated using three-point bending tests. There were considerable differences in the flexural properties around the hoof capsule; transverse beams from the heel were 45% more compliant than those from the toe region. This corresponded with changes in the hydration of the hoof wall; beams from the heel region were more hydrated (28.2 ± 0.60%) than those from the toe (24.2 ± 0.44%; P < 0.01). Regional variation in the water content is thought to help explain differences in the flexural properties. Mechanical data are further discussed in relation to variation in the structure and loading of the hoof wall.

Keywords

equinehoofstratum mediummechanical propertiesanisotropy
Type
Research Paper
Information
Comparative Exercise Physiology , Volume 5 , Issue 3-4 , November 2008 , pp. 161 - 168
Copyright
Copyright © Cambridge University Press 2009

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References

1Zoerb, GC and Leach, DH (1978). Mechanical properties of the hoof wall of the horse. American Society of Agricultural Engineers (ASAE) technical paper, No. 78-3063 pp. 1–14.Google Scholar
2Bertram, JEA and Gosline, JM (1986). Fracture toughness design in horse hoof keratin. Journal of Experimental Biology 125: 29–47.CrossRefGoogle ScholarPubMed
3Leach, DH and Zoerb, GC (1983). Mechanical properties of equine hoof wall tissue. American Journal of Veterinary Research 44: 2190–2194.Google ScholarPubMed
4Dyhre-Poulsen, P, Smedegaard, HH, Roed, J and Korsgaard, E (1994). Equine hoof function investigated by pressure transducers inside the hoof and accelerometers mounted on the first phalanx. Equine Veterinary Journal 26: 362–366.CrossRefGoogle ScholarPubMed
5Lungwitz, A (1891). The changes in the form of the horse's hoof under the action of bodyweight. Journal of Comparative Pathology and Therapeutics 4: 191–211.CrossRefGoogle Scholar
6Thomason, JJ, Biewener, AA and Bertram, JEA (1992). Surface strain on the equine hoof wall in vivo: implication for the material design and functional morphology of the wall. Journal of Experimental Biology 166: 145–168.CrossRefGoogle Scholar
7Newlyn, HA, Collins, SN, Cope, BC, Hopegood, L, Latham, RJ and Reilly, JD (1998). Finite element analysis of static loading in donkey hoof wall. Equine Veterinary Journal Supplement 26: 103–110.CrossRefGoogle Scholar
8Stump, JE (1967). Anatomy of the normal equine foot, including microscopic features of the laminar region. Journal of the American Veterinary Medical Association 151: 1588–1598.Google ScholarPubMed
9Bertram, JEA and Gosline, JM (1987). Functional design of horse hoof keratin: the modulation of mechanical properties through hydration effects. Journal of Experimental Biology 130: 121–136.CrossRefGoogle ScholarPubMed
10Kitchener, A and Vincent, JFV (1987). Composite theory and the effect of water on the stiffness of horn keratin. Journal of Material Science 22: 1385–1389.CrossRefGoogle Scholar
11Niklas, KJ (1992). Voigt and Reuss models for predicting changes in Young's modulus of dehydrating plant organs. Annals of Botany 70: 347–355.CrossRefGoogle Scholar
12Fraser, RDB and Macrae, TP (1980). Molecular structure and mechanical properties of keratins. In: Vincent, JFV and Currey, JD (eds) The Mechanical Properties of Biological Materials. Symposium of the Society for Experimental Biology, XXXXIV, Cambridge, UK: Cambridge University Press, pp. 211–246.Google Scholar
13Collins, SN, Cope, BC, Hopegood, L, Latham, RJ, Linford, RG and Reilly, JD (1998). Stiffness as a function of moisture content in natural materials: characterisation of hoof horn samples. Journal of Materials Science 33: 5185–5191.CrossRefGoogle Scholar
14Bonser, RHC and Farrent, JW (2001). Influence of hydration on the mechanical performance of duck down feathers. British Poultry Science 42: 271–273.CrossRefGoogle ScholarPubMed
15Hinterhofer, C, Stanek, C and Binder, K (1998). Elastic modulus of equine hoof horn, tested in wall samples, sole samples and frog samples at varying levels of moisture. Berliner und Münchener Tierärztliche Wochenschrift 111: 217–221.Google ScholarPubMed
16Wagner, IP and Hood, DM (2002). Effect of prolonged water immersion on equine hoof epidermis in vitro. American Journal of Veterinary Research 63: 1140–1144.CrossRefGoogle ScholarPubMed
17Wagner, IP, Hood, DM and Hogan, HA (2001). Comparison of bending modulus and yield strength between outer stratum medium and stratum medium zona alba in equine hooves. American Journal of Veterinary Research 62: 745–751.CrossRefGoogle ScholarPubMed
18Vincent, JFV (1992). Biomechanics-materials: A Practical Approach. Oxford, UK: IRL Press at Oxford University Press, pp. 247.CrossRefGoogle Scholar
19Kasapi, MA and Gosline, JM (1996). Strain-rate-dependent mechanical properties of the equine hoof wall. Journal of Experimental Biology 199: 1133–1146.CrossRefGoogle ScholarPubMed
20Jackson, AP (1992). Bone, nacre and other ceramics. In: Vincent, JFV (ed.) Biomechanics-materials: A Practical Approach. Oxford, UK: IRL Press at Oxford University Press, pp. 33–56.CrossRefGoogle Scholar
21Sokal, RR and Rohlf, FJ (1995). Biometry: The Principles and Practice of Statistics in Biological Research. 3rd edn. New York: W.H. Freeman and Company, pp. 887.Google Scholar
22Douglas, JE, Mittal, C, Thomason, JJ and Jofriet, JC (1996). The modulus of elasticity of equine hoof wall: implications for the mechanical function of the hoof. Journal of Experimental Biology 199: 1829–1836.CrossRefGoogle ScholarPubMed
23Dejardin, LM, Arnoczky, SP and Cloud, GL (1999). A method for determination of equine hoof strain patterns using photoelasticity: an in vitro study. Equine Veterinary Journal 31: 232–237.CrossRefGoogle ScholarPubMed
24Crewther, WG, Dowling, LM, Steinert, PM and Parry, DAD (1983). Structure of intermediate filaments. International Journal of Biological Macromolecules 5: 267–274.CrossRefGoogle Scholar
25Kasapi, MA and Gosline, JM (1997). Design complexity and fracture control in the equine hoof wall. Journal of Experimental Biology 200: 1639–1659.Google ScholarPubMed
26Kasapi, MA and Gosline, JM (1998). Exploring the possible functions of equine hoof wall tubules. Equine Veterinary Journal Supplement 26: 10–14.CrossRefGoogle Scholar
27Reilly, JD, Collins, SN, Cope, BC, Hopegood, L and Latham, RJ (1998). Tubule density of the stratum medium of horse hoof. Equine Veterinary Journal Supplement 26: 4–9.CrossRefGoogle Scholar
28Butler, KD and Hintz, HF (1977). Effect of level of feed intake and gelatin supplementation on growth and quality of hoofs of ponies. Journal of Animal Science 44: 257–261.CrossRefGoogle ScholarPubMed
29Kasapi, MA and Gosline, JM (1999). Micromechanics of the equine hoof wall: optimizing crack control and material stiffness through modulation of the properties of keratin. Journal of Experimental Biology 202: 377–391.CrossRefGoogle ScholarPubMed