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Density and strength distribution in the human subchondral bone plate of the patella

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Abstract

Purpose

The aim of this study was to map the strength distribution of the human patella and correlate it to the subchondral bone plate density obtained by means of computed tomographyosteoabsorptiometry (CT-OAM).

Methods

Measurements were performed at 34 standardized points on each patella. The mineralization patterns of the subchondral bone plate of 20 patellae were displayed with the help of CT-OAM. False-coloured distribution patterns for our measurements were generated. The mechanical strength was determined at the same points by indentation testing.

Results

We showed that neither the density nor the mechanical strength is distributed homogeneously but exhibited regular, reproducible distribution patterns which mirror long-term stress distribution in articular surfaces. A direct correlation was found between both parameters in the subchondral bone plate.

Conclusion

The correlation of density and mechanical strength makes CT-OAM a valuable tool to assess and monitor changes in the strength of the subchondral bone plate in vivo.

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Authors and Affiliations

  1. Institute of Anatomy, University of Basel, Basel, Switzerland

    Sebastian Hoechel & Magdalena Müller-Gerbl

  2. Laboratory of Biomechanics & Biocalorimetry, University of Basel, Basel, Switzerland

    Dieter Wirz

Authors
  1. Sebastian Hoechel
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  2. Dieter Wirz
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  3. Magdalena Müller-Gerbl
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Correspondence to Magdalena Müller-Gerbl.

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Hoechel, S., Wirz, D. & Müller-Gerbl, M. Density and strength distribution in the human subchondral bone plate of the patella. International Orthopaedics (SICOT) 36, 1827–1834 (2012). https://doi.org/10.1007/s00264-012-1545-2

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  • DOI: https://doi.org/10.1007/s00264-012-1545-2

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