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Effect of Tibial Plateau Angle on Cranial Cruciate Ligament Strain: An Ex Vivo Study in the Dog
Author(s) -
Haynes Kevin H.,
Biskup Jeffrey,
Freeman Andrew,
Conzemius Michael G.
Publication year - 2015
Publication title -
veterinary surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 79
eISSN - 1532-950X
pISSN - 0161-3499
DOI - 10.1111/j.1532-950x.2014.12219.x
Subject(s) - cadaveric spasm , cruciate ligament , strain (injury) , medicine , ex vivo , femur , anatomy , stifle joint , knee flexion , anterior cruciate ligament , strain gauge , biomedical engineering , orthodontics , in vivo , surgery , materials science , composite material , microbiology and biotechnology , biology
Objective To evaluate the relationship between tibial plateau angle (TPA) and strain in the intact cranial cruciate ligament (CCL) during axial loading. Study Design Ex vivo mechanical testing study. Sample Population Cadaveric canine stifles (n = 6). Methods A bicentric and uni‐radial Slocum saw blade was used to perform the osteotomy on each stifle and a custom designed plate was secured to the leg. Each stifle was loaded and CCL strain and axial displacement were recorded. TPA was adjusted to −20°, −10°, 0°, +10°, +20° of normal. Change in the strain was assessed during the axial loading period. Results For all specimens, linear displacement of the femur and CCL strain increased with increasing axial load. Mean change in strain was 4.41, 5.26, 6.02, 6.3, and 7.39 at −20°, −10°, 0°, 10°, and 20°, respectively. The R‐squared for the linear regression equation was 0.91, suggesting a strong relationship between change in TPA and CCL strain. Conclusions The mechanical testing model used found CCL strain increased with increasing axial load regardless of the TPA. Decreasing TPA decreased strain in the intact CCL.