Total Hip Replacement in Three Ponies - A Feasibility Study

K.R.E. Squire; J.F. Fessier; J. P. Toombs; D.C. Van Sickle; W.E. Blevins; R.B. Clarke

doi:10.1055/s-0038-1632494

Veterinary and Comparative Orthopaedics and Traumatology, Table of Contents

Vet Comp Orthop Traumatol 1996; 09(01): 4-9
DOI: 10.1055/s-0038-1632494

Original Research

Schattauer GmbH

Total Hip Replacement in Three Ponies - A Feasibility Study

Authors

K.R.E. Squire

¹From the Department of Veterinary Clinical Sciences, Indiana, USA
J.F. Fessier

¹From the Department of Veterinary Clinical Sciences, Indiana, USA
J. P. Toombs

¹From the Department of Veterinary Clinical Sciences, Indiana, USA
D.C. Van Sickle

²Department of Basic Medical Sciences, School of Veterinary Medicine, Lynn Hall, Purdue University, West Lafayette, Indiana
W.E. Blevins

¹From the Department of Veterinary Clinical Sciences, Indiana, USA
R.B. Clarke

³DePuy, Inc., Warsaw, Indiana, USA

Abstract

Summary

Total hip replacement (THR) using two different human implant designs was performed in three ponies. Pony # 1 sustained a fracture of the ipsilateral femur and was euthanatized 40 hours after implantation of a human selfcentering hip. The same implant, with a modified femoral prosthesis, was used in pony # 2. It luxated initially at 26 hours, was surgically reduced after changing to a smaller diameter acetabular component, and reluxated at day 23 when the pony was euthanatized. A modified femoral component with a press-fit, screw-fixated acetabular prosthesis was inserted in pony # 3. This pony was maintained for 232 days and sustained over 400,000 cycles on the prosthesis by being exercised daily on a mechanical walker. We conclude that THR is feasible in ponies and small horses and would allow this size of animal to be used as a research model for hip replacement in heavy human beings.

Total hip replacement (THR) was evaluated in three ponies as a model for studying THR problems in humans and for the management of coxofemo-ral disease in small Equidae. A modified cemented human femoral component, with a press-fit acetabular component, was maintained in one pony for 232 days, sustained over 400,000 cycles, and established the feasibility of THR in this species.

Keywords

Equine - Total hip replacement

Full Text

References

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