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Charcot Collapse: Does Collapse Pattern Dictate Osseous Metabolism?

Lisa Grant1,2,3,4, Robert Yoho1,2,3,4, Chandana Halaharvi1,2,3,4

  • 1Western Pennsylvania Hospital Department of Foot and Ankle Surgery, Pittsburgh, Pennsylvania (LG).

Foot & Ankle Specialist
|December 30, 2016
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Summary
This summary is machine-generated.

Charcot fracture pattern (FP) in the foot and ankle shows lower bone density and higher bone turnover markers compared to the dislocation pattern (DP). This suggests FP patients may have increased difficulty healing fractures.

Keywords:
Charcot neuroarthropathybonedislocationfracturemetabolismpattern

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Area of Science:

  • Orthopedics
  • Metabolic Bone Disease
  • Podiatry

Background:

  • Charcot neuroarthropathy presents distinct foot and ankle collapse patterns: fracture pattern (FP) and dislocation pattern (DP).
  • These patterns are hypothesized to correlate with differences in central and local bone mineral density (BMD).
  • Understanding local bone composition is crucial for managing Charcot foot complications.

Purpose of the Study:

  • To investigate variations in local bone composition between Charcot fracture pattern (FP) and dislocation pattern (DP) of the foot and ankle.
  • To compare bone mineral density (BMD) and bone metabolic markers in FP and DP patients.

Main Methods:

  • Recruited 10 patients (5 FP, 5 DP) with Charcot neuroarthropathy.
  • Measured central and peripheral BMD using DEXA scans, and assessed bone turnover markers: sRANKL, sRAGE, and osteocalcin.
  • Compared patient data with healthy controls and between FP and DP groups.

Main Results:

  • FP patients exhibited significantly reduced central and peripheral BMD compared to healthy controls (P = .002 and P < .0001).
  • FP patients showed significantly higher levels of sRANKL (P = .05) and sRAGE (P = .002) compared to DP patients.
  • Elevated osteocalcin in FP patients suggests increased bone production, potentially indicating impaired microfracture repair.

Conclusions:

  • Charcot fracture pattern is associated with osteopenia/osteoporosis and altered bone turnover.
  • FP patients present a bone metabolic profile suggesting challenges in fracture healing, increasing nonunion risk during reconstruction.
  • Significant variations in bone composition exist between FP and DP subtypes of Charcot foot.