Multi-axial spine biomechanical testing system with speckle displacement instrumentation.
This paper reports on the design and development of a multi-axis (up to 6 axes) mechanical tester for spinal research and testing. The developed spine tester allowed true motion to be simulated on a specimen in pure or combined modes. To demonstrate the capability of the new tester flexural stiffness properties of sheep lumbar motion segments were evaluated together wiith a non-contact speckle displacement measurement system. The flexural stiffness of the specimens was measured and compared under constrained and non-constrained testing conditions; with relieving of shear forces (non-constrained), it was found that the specimen behaved in a 'stiffer' manner.
Chung
S M
SM
Center for Biomedical Materials Applications and Technology, National University of Singapore.
Teoh
S H
SH
Tsai
K T
KT
Sin
K K
KK
D000818:Animals; D001698:Biomedical Engineering / Q000295:instrumentation*; D004548:Elasticity; D004867:Equipment Design; D008159:Lumbar Vertebrae / Q000502:physiology*; D008954:Models, Biological; D009038:Motion; D016059:Range of Motion, Articular / Q000502:physiology; D015203:Reproducibility of Results; D012399:Rotation; D012680:Sensitivity and Specificity; D012756:Sheep; D013314:Stress, Mechanical; D019415:Torque; D016474:Weight-Bearing / Q000502:physiology*