Contact mechanics of simulated meniscal tears in cadaveric canine stifles.
OBJECTIVE
To evaluate the biomechanical effects of 5 types of meniscal lesions on contact mechanics in the canine stifle.


METHODS
Experimental study.


METHODS
Cadaveric canine stifles (n=12 pair).


METHODS
Medial meniscal lesions (radial, vertical longitudinal, nonreducible bucket handle, flap, and complex tears) were simulated in cadaveric stifles. A contact map was recorded from each tear type and contact area (CA) and peak contact pressure (PCP) from each tear type were compared.


RESULTS
A significant difference in PCP was detected between control and nonreducible bucket handle, flap, and complex tears. PCP increased by >45% in nonreducible bucket handle, flap, and complex meniscal tears when compared with control. No significant difference was found in PCP between control and radial and vertical longitudinal tears. No significant difference was found in CA between any of the meniscal conditions.


CONCLUSIONS
Nonreducible bucket handle, flap, and complex tears cause a significant increase in PCP. Radial and vertical longitudinal tears had a minimal impact on the contact pressures of the medial compartment of the stifle.


CONCLUSIONS
Based on this ex vivo model, we support the clinical recommendation of debriding nonreducible bucket handle, flap, and complex tears because the injured portion of the meniscus no longer contributes significantly to the function of the meniscus. Radial and vertical longitudinal tears do not cause a change in contact mechanics allowing consideration of nonsurgical treatment and meniscal repair, respectively. Future experimental and clinical studies should aim to refine the treatment of specific meniscal injuries.
Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida Veterinary Medical Center, 2015 S.W. 16th Avenue, Gainesville, FL 32610, USA.
Kelley M
KM
Thieman
Antonio
A
Pozzi
Hang-Yin
HY
Ling
Daniel D
DD
Lewis
Marybeth
M
Horodyski
D000818:Animals; D001696:Biomechanical Phenomena / Q000502:physiology*; D002102:Cadaver; D002356:Cartilage / Q000473:pathology / Q000502:physiology; D004285:Dogs; D005260:Female; D008297:Male; D013264:Stifle / Q000473:pathology* / Q000502:physiology*