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Related Experiment Videos

Defining flatfoot.

J M Tareco1, N H Miller, B A MacWilliams

  • 1Department of Orthopaedic Surgery, Johns Hopkins Hospital, Baltimore, Maryland, USA. jtareco@sbhcs.com

Foot & Ankle International
|August 7, 1999
PubMed
Summary
This summary is machine-generated.

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This study objectively defines pes planus (flatfoot) using midfoot force measurements. A threshold of 24.0% medial midfoot force was established, identifying a significant percentage of Marfan syndrome patients with abnormal foot mechanics.

Area of Science:

  • Biomechanics
  • Orthopedics
  • Podiatry

Background:

  • Pes planus, commonly known as flatfoot, lacks an objective, quantifiable definition in scientific literature.
  • Existing descriptions of flatfoot are often subjective, hindering consistent diagnosis and research.
  • Understanding the biomechanical characteristics of the foot is crucial for diagnosing and managing foot conditions.

Purpose of the Study:

  • To objectively define pes planus (flatfoot) using quantitative biomechanical measurements.
  • To establish a diagnostic threshold for pes planus based on midfoot force distribution during single leg stance.
  • To evaluate the prevalence of abnormal midfoot force distribution in a population with Marfan syndrome.

Main Methods:

  • Utilized pressure-sensitive film and a Harris mat to analyze the single leg stance footprint.

Related Experiment Videos

  • Assessed force distribution across the forefoot, midfoot, and hindfoot in healthy individuals.
  • Calculated the ratio of medial midfoot force to total midfoot force to establish a normative range.

    • Main Results:

    • Defined pes planus as a medial midfoot force/total midfoot force ratio exceeding 24.0% (mean + 2 SD).
    • The mean medial midfoot force/total midfoot force in healthy individuals was 11.1% (SD = 6.5%).
    • In Marfan syndrome patients, 25% exhibited midfoot force distributions outside the normal range, despite a similar overall mean ratio (16.0%).

    Conclusions:

    • Established an objective biomechanical definition for pes planus based on midfoot force.
    • The findings suggest a higher prevalence of abnormal foot mechanics in individuals with Marfan syndrome.
    • This quantitative approach provides a foundation for improved diagnosis and understanding of flatfoot conditions.