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Early foetal development of the articular disc in the human temporomandibular joint

Anna Wierusz1, Witold Woźniak

  • 1Department of Anatomy, University of Medical Sciences, Poznań, Poland Voivodship Stomatology Centre, Warszawa, Poland.

Folia Morphologica
|July 3, 2004
PubMed

Insights

The temporomandibular joint disc in developing fetuses shows increasing collagen and cellular changes between 9 and 12 weeks. These structural developments are crucial for understanding early temporomandibular joint formation.

Area of Science:

  • Embryology
  • Anatomy
  • Histology

Background:

  • The temporomandibular joint (TMJ) is a complex articulation.
  • Understanding its early development is key to identifying congenital abnormalities.

Purpose of the Study:

  • To describe the histological changes in the articular disc of the TMJ during early human fetal development.
  • To document the cellular and fibrous composition of the disc in 9-12 week fetuses.

Main Methods:

  • Histological examination of TMJ specimens from human fetuses.
  • Microscopic analysis of articular disc structure, cellularity, and fiber content.

Main Results:

  • Between 9 and 10 weeks of gestation, the articular disc exhibits a highly cellular structure with connective tissue fibers.
  • By 11-12 weeks, there is a notable increase in collagenous fibers.
  • Fusiform cells become predominantly located on the disc's surface during this period.

Conclusions:

  • The early fetal TMJ articular disc undergoes significant histological differentiation.
  • Increasing collagenization and specific cell distribution suggest preparation for functional loading.

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