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Vet Comp Orthop Traumatol 2018; 31(02): 131-136
DOI: 10.1055/s-0038-1627476
Original Research
Schattauer GmbH Stuttgart

The Effect of Tibial Plateau Levelling Osteotomy on Stifle Extensor Mechanism Load: A Canine Ex Vivo Study

Jarrod O. Drew
,
Mark R. Glyde
,
Giselle L. Hosgood
,
Alex J. Hayes

Funding This study was funded by the Research Masters in Training scholarship fund from The Animal Hospital at Murdoch University.
Further Information

Publication History

27 July 2017

19 December 2017

Publication Date:
13 March 2018 (online)

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Abstract

Objective To evaluate the effect of tibial plateau levelling osteotomy on stifle extensor mechanism load in an ex vivo cruciate-intact canine cadaveric model.

Study Design Ex vivo mechanical testing study.

Animals Cadaveric canine pelvic limbs (n = 6).

Materials and Methods A 21-mm tibial radial osteotomy was performed on pelvic limbs (n = 6) prior to being mounted into a load-bearing limb press. The proximal tibial segment was incrementally rotated until the anatomical tibial plateau angle had been rotated to at least 1°. The proportional change in stifle extensor mechanism load between the anatomical tibial plateau angle and the neutralized (∼6.5 degrees) and over-rotated (∼1°) tibial plateau angle was analysed using a one-sample t-test against a null hypothesis of no change. A p-value ≤0.05 was considered significant.

Results There was no significant change in the stifle extensor mechanism load from the anatomical tibial plateau angle (308 N [261–355 N]) to the neutralized tibial plateau angle (313 N [254–372 N]; p =.81), or from the anatomical tibial plateau angle to the over-rotated tibial plateau angle (303 N [254–352 N; p = 0.67).

Conclusion Tibial plateau levelling osteotomy does not significantly alter stifle extensor mechanism load at either a neutralized or over-rotated tibial plateau angle in our cruciate-intact model.

Keywords

cruciate ligament disease - TPLO - biomechanics - dog - canine

Author Contributions

All authors contributed to the study conception, the study design, the acquisition of data, data analysis and interpretation, drafting or revising of the manuscript, and approved the submitted manuscript.