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Related Concept Videos

Ankle Joint01:10

Ankle Joint

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The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...
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Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...
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Flatfoot: New diagnostic modalities.

Matthieu Lalevée1, Louis Dagneaux2, François Lintz3

  • 1Normandie Univ, UNIROUEN, CETAPS UR3832, Groupe d'Etude Normand Interdisciplinaire de l'Appareil Locomoteur (GENIAL) F-76000 Rouen, France; Rouen University Hospital, Orthopedic and Trauma Surgery Department, 37 Boulevard Gambetta, 76000 Rouen, France.

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Summary
This summary is machine-generated.

Progressive Collapsing Foot Deformity (PCFD) is a complex condition involving multiple factors beyond posterior tibial tendon issues. Advanced imaging and biomechanical analysis are key to understanding and classifying this painful foot deformity.

Keywords:
CT posterior tibial tendonFlatfootProgressive collapsing foot deformityWeightbearing

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Area of Science:

  • Orthopedics
  • Biomechanics
  • Medical Imaging

Background:

  • Adult acquired flatfoot deformity, now termed Progressive Collapsing Foot Deformity (PCFD), presents diagnostic and therapeutic challenges due to poorly understood multifactorial pathogenesis.
  • Historically attributed to posterior tibial tendon dysfunction, PCFD is now recognized as involving a complex interplay of osseous dysplasia, joint malposition, and tendon-muscle imbalances.

Purpose of the Study:

  • To provide an updated understanding of PCFD by addressing key questions regarding its nature, pathogenesis, classification, diagnostic imaging, and future research directions.
  • To differentiate between asymptomatic stable flatfoot and symptomatic PCFD, identifying risk factors for progression.

Main Methods:

  • Review and synthesis of current knowledge on PCFD.
  • Discussion of the role of soft tissues and multifactorial causes.
  • Introduction of the PCFD classification system (hindfoot valgus, midfoot abduction, forefoot varus, peritalar subluxation, tibiotalar valgus).
  • Highlighting the utility of weight-bearing Cone Beam CT for early identification of subluxations and joint impingements.
  • Exploring advanced imaging (biplanar fluoroscopy) and computational simulations for real-time motion analysis and biomechanical understanding.

Main Results:

  • Stable congenital flatfoot is typically asymptomatic, whereas PCFD involves progressive arch collapse and pain.
  • The pathogenesis of PCFD is multifactorial, with a reconsidered role for posterior tibial tendon dysfunction.
  • The PCFD classification identifies five types of deformities that can occur independently or in combination, flexibly or rigidly.
  • Weight-bearing Cone Beam CT aids in distinguishing stable flatfoot from PCFD and reveals complex deformities.
  • Emerging research focuses on differentiating stable flatfoot from PCFD and understanding progression through dynamic imaging and computational modeling.

Conclusions:

  • PCFD is a complex, multifactorial deformity requiring a nuanced understanding beyond traditional theories.
  • Advanced imaging techniques like Cone Beam CT and biplanar fluoroscopy, alongside computational simulations, are crucial for accurate diagnosis, classification, and understanding the biomechanics of PCFD.
  • Further research is needed to differentiate risk factors for symptomatic progression and refine treatment strategies for PCFD.