Kevin H Haynes1, Jeffrey Biskup, Andrew Freeman, Michael G Conzemius.
Abstract
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. © Copyright 2014 by The American College of Veterinary Surgeons.
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. © Copyright 2014 by The American College of Veterinary Surgeons.
Entities:
Mesh：
Year: 2014
PMID： 24902869 DOI： 10.1111/j.1532-950X.2014.12219.x
Source DB: PubMed Journal: Vet Surg ISSN： 0161-3499 Impact factor: 1.495