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Histologic anatomy of the lesser metatarsophalangeal joint plantar plate

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Abstract

The plantar plate is the fibrocartilaginous structure that supports the ball of the foot, withstanding considerable compressive and tensile forces. This study describes the morphology of the plantar plate in order to understand its function and the pathologic disorders associated with it. Eight lesser metatarsophalangeal joint plantar plates from three soft-embalmed cadavers (74–92 years, two males, one female), and eight lesser metatarsophalangeal joint plantar plates from a fresh cadaver (19-year-old male) were obtained for histology assessment. Paraffin sections (10 μm) in the longitudinal and transverse planes were analyzed with bright-field and polarized light microscopy. The central plantar plate collagen bundles run in the longitudinal plane with varying degrees of undulation. The plantar plate borders run transversely and merge with collateral ligaments and the deep transverse intermetatarsal ligament. Bright-field microscopic evaluation shows the plantar aspect of the plantar plate becomes ligament-like the further distally it tapers, containing fewer chondrocytes, and a greater abundance of fibroblasts. The enthesis reveals longitudinal and interwoven collagen bundles entering the proximal phalanx with multiple interdigitations. Longer interdigitations centrally compared to the dorsal and plantar aspects suggest that the central fibers experience the greatest loads.

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Acknowledgments

Victorian Institute of Forensic Medicine for the provision of the cadaver, and Mr. I. Boundy for histology services.

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Authors and Affiliations

  1. Department of Medical Imaging, Faculty of Medicine, Monash University, Clayton, VIC, Australia

    J. Gregg & M. Silberstein

  2. Symbion Health, Vaucluse Hospital, 82 Moreland Road, Brunswick, 3056, VIC, Australia

    J. Gregg

  3. Symbion Health, The Avenue Hospital, Windsor, VIC, Australia

    P. Marks

  4. Melbourne Orthopaedic Group, Windsor, VIC, Australia

    T. Schneider

  5. Department of Anatomy and Cell Biology, Faculty of Medicine, Monash University, Clayton, VIC, Australia

    J. Kerr

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  1. J. Gregg
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  2. P. Marks
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  3. M. Silberstein
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  4. T. Schneider
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  5. J. Kerr
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Correspondence to J. Gregg.

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Gregg, J., Marks, P., Silberstein, M. et al. Histologic anatomy of the lesser metatarsophalangeal joint plantar plate. Surg Radiol Anat 29, 141–147 (2007). https://doi.org/10.1007/s00276-007-0188-2

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  • DOI: https://doi.org/10.1007/s00276-007-0188-2

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