The objectives of this study are to present a 2-D optical method for measuring gross kinematics of porcine anterior column units (ACUs) exposed to swelling with no applied load, provide a detailed error analysis of the 2-D optical measurement technique, and present a 2-D radiographic technique for measuring the distribution of x-ray intensity through an axial slice of the disc. The 2-D optical technique was sufficient for detecting the flexion-extension behavior of the ACUs tested. The error analysis concluded that the use of a second camera to quantify out of plane movement of the specimen would greatly improve the accuracy of the measurement of angle. The 2-D radiographic technique provided limited information on changes in intradiscal material. It was also limited in its accuracy and dependability (i.e., only 5 out of 13 specimens provided radiographs suitable for this analysis). The results of this study indicate that a relationship might exist between the flexion-extension behavior observed from swelling and intradiscal shifts of matter. Further work is needed to confirm this relationship.
In Vitro Measurements of Porcine Anterior Column Units Under Free Swelling
Contributed by the Bioengineering Division for publication in the JOURNAL OF BIOMECHANICAL ENGINEERING. Manuscript received by the Bioengineering Division August 20, 2002; revision received June 10, 2003. Associate Editor: M. L. Hull.
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Reiter, D. A., Sarigul-Klijn, N., Gupta, M. C., and Fathallah, F. A. (January 9, 2004). "In Vitro Measurements of Porcine Anterior Column Units Under Free Swelling ." ASME. J Biomech Eng. December 2003; 125(6): 875–880. https://doi.org/10.1115/1.1634283
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