The Effect of Stifle Angle on Stifle Kinematics following TPLO: An in vitro Experimental Analysis

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dc.contributor.authorJohnson, Kelly Annen
dc.contributor.committeechairLanz, Otto I.en
dc.contributor.committeememberHarper, Tisha A.en
dc.contributor.committeememberMcLaughlin, Ronalden
dc.contributor.departmentVeterinary Medical Sciencesen
dc.date.accessioned2014-03-14T20:34:39Zen
dc.date.adate2010-05-12en
dc.date.available2014-03-14T20:34:39Zen
dc.date.issued2010-04-19en
dc.date.rdate2010-05-12en
dc.date.sdate2010-04-30en
dc.description.abstractObjective: To determine the ability of the Tibial Plateau Leveling Osteotomy (TPLO) to restore normal joint kinematics in a cranial cruciate ligament (CrCL)-deficient stifle through a loaded range of motion. Methods: Paired pelvic limbs from 12 dogs were compared in an in vitro biomechanical study. Each limb was placed in a custom designed jig at 120° of stifle extension under an axial load of 20% body weight. Electromagnetic motion tracking sensors were placed on the distal femur and proximal tibia. A force was applied at approximately 10 N/sec to mimic the action of the quadriceps muscle. Force application allowed the limb to move from 120° to maximal extension. Positional data was acquired at 60 points/second. Each limb was tested under normal, CrCL-deficient, and TPLO-treated conditions. Results: The TPLO failed to normalize CTT within the CrCL-deficient stifle; however, values trended towards intact values throughout the range of motion. No significant differences were noted in internal rotation in any of the three conditions from 120° – 137°. Hyperextension values did not differ significantly between conditions. Conclusion: Data from this biomechanical model suggests that the TPLO fails to neutralize CTT throughout a loaded range of motion. Internal rotation and hyperextension values were not found to differ significantly between intact, CrCL-deficient and TPLO repaired stifles. The effectiveness of the TPLO in restoring normal biomechanics is more significant at greater angles of flexion.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-04302010-144750en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-04302010-144750/en
dc.identifier.urihttp://hdl.handle.net/10919/32061en
dc.publisherVirginia Techen
dc.relation.haspartJohnson_KA_T_2010.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectHyperextensionen
dc.subjectInternal rotationen
dc.subjectCranial tibial translationen
dc.subjectKinematicsen
dc.subjectTibial plateau leveling osteotomyen
dc.titleThe Effect of Stifle Angle on Stifle Kinematics following TPLO: An in vitro Experimental Analysisen
dc.typeThesisen
thesis.degree.disciplineVeterinary Medical Sciencesen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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