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Hasler EM, Herzog W, Fick GH. Appropriateness of plane pressure-sensitive film calibration for contact stress measurements in articular joints. Clin Biomech (Bristol, Avon). 1996;11(6):358-360doi: 10.1016/0268-0033(96)00024-1.
Hasler, E. M., Herzog, W., & Fick, G. H. (1996). Appropriateness of plane pressure-sensitive film calibration for contact stress measurements in articular joints. Clinical biomechanics (Bristol, Avon), 11(6), 358-360. https://doi.org/10.1016/0268-0033(96)00024-1
Hasler, E M, et al. "Appropriateness of plane pressure-sensitive film calibration for contact stress measurements in articular joints." Clinical biomechanics (Bristol, Avon) vol. 11,6 (1996): 358-360. doi: https://doi.org/10.1016/0268-0033(96)00024-1
Hasler EM, Herzog W, Fick GH. Appropriateness of plane pressure-sensitive film calibration for contact stress measurements in articular joints. Clin Biomech (Bristol, Avon). 1996 Sep;11(6):358-360. doi: 10.1016/0268-0033(96)00024-1. PMID: 11415646.
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Clin Biomech (Bristol, Avon). 1996 Sep;11(6):358-360. doi: 10.1016/0268-0033(96)00024-1.

Appropriateness of plane pressure-sensitive film calibration for contact stress measurements in articular joints.

Clinical biomechanics (Bristol, Avon)

E M Hasler, W Herzog, G H Fick

Affiliations

  1. Human Performance Laboratory, Faculty of Kinesiology, The University of Galgary, Alberta, Canada.

PMID: 11415646 DOI: 10.1016/0268-0033(96)00024-1

Abstract

OBJECTIVE: To examine how accurately calibration stains from pressure-sensitive film samples compressed between perfectly flat surfaces represent contact pressures measured with the film inserted between curved joint surfaces. DESIGN: Experimental study. BACKGROUND: Contact pressure distributions and areas in joints are often quantified using pressure-sensitive film inserted between the articular surfaces. Absolute pressure values are recovered from the film through a calibration procedure. Since the calibration is typically performed in a different environment from the experimental measurements, a systematic error in the pressure magnitudes may be introduced. METHODS: Calibration stains were produced with an Instron machine using a flat and a slightly curved indenter. Calibration curves were fitted to the raw data of both indenters using a model representing the functional characteristics of the pressure-sensitive film. RESULTS: No systematic differences between the calibration curves from the flat and the curved indenter were observed. CONCLUSIONS: It appears that calibration with the film in a flat configuration is adequate for contact pressure measurements between moderately curved articular surfaces.

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