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Related Experiment Videos

Development of the human knee joint

J A Mérida-Velasco1, I Sánchez-Montesinos, J Espín-Ferra

  • 1Department of Morphological Sciences, University of Granada, Spain.

The Anatomical Record
|June 1, 1997
PubMed
Summary

This study establishes a precise timeline for human knee joint development, clarifying discrepancies in its morphogenesis. Key events like joint cavitation and menisci formation are detailed for improved understanding of knee development.

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Area of Science:

  • Embryology
  • Developmental Biology
  • Orthopedics

Background:

  • Discrepancies exist in the established timeline for human knee joint development.
  • Key areas of debate include the timing of joint cavitation and the role of the superior tibiofibular joint.

Purpose of the Study:

  • To establish a definitive morphogenetic timetable for the human knee joint.
  • To resolve existing disagreements regarding knee joint development stages.

Main Methods:

  • Analysis of 50 serially sectioned human embryonic and fetal lower limbs.
  • Detailed observation of developmental stages from O'Rahilly stages.

Main Results:

  • Femur and tibia epiphyses chondrify from O'Rahilly stage 18; ossification begins week 13.

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  • Patella development: blastema (stage 19), chondrification (stage 22), ossification (week 14).
  • Knee joint cavity appears (stage 22), initially as femoropatellar joint; superior tibiofibular joint separates by week 13.

    • Conclusions:

    • A comprehensive morphogenetic timetable for human knee joint development has been established.
    • The findings clarify the sequence and timing of critical developmental events in the knee.