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Related Experiment Videos

An anatomic study of the triquetrum-hamate joint.

James McLean1, Gregory Bain, Michael Eames

  • 1Department of Orthopaedic Surgery, Royal Adelaide Hospital, University of Adelaide, Adelaide, South Australia, Australia.

The Journal of Hand Surgery
|April 25, 2006
PubMed
Summary

The triquetrum-hamate (TqH) joint exhibits two primary articulation patterns, TqH-1 and TqH-2, with variations suggesting a spectrum of joint configurations. Understanding these TqH joint patterns is crucial for wrist biomechanics.

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Area of Science:

  • Orthopedic Surgery
  • Anatomy
  • Biomechanics

Background:

  • The triquetrum-hamate (TqH) joint is a critical articulation within the wrist's carpal bones.
  • Understanding the morphology of the TqH joint is essential for diagnosing and treating wrist pathologies.

Purpose of the Study:

  • To investigate and classify the articulating surfaces of the triquetrum-hamate joint.
  • To identify distinct patterns and variations in the TqH joint's morphology.

Main Methods:

  • Examination of carpal bones from 46 wrist specimens.
  • Analysis of the shape, convexity, and concavity of the TqH joint surfaces.
  • Classification of hamate and triquetrum articular surface patterns.

Main Results:

Related Experiment Videos

  • Two primary patterns of hamate articular surfaces (Type I and Type II) were identified.
  • Two primary patterns of triquetrum articular surfaces (Type A and Type B) were identified.
  • A strong correlation was observed between Type A triquetrum and Type I hamate, and Type B triquetrum and Type II hamate.

Conclusions:

  • The triquetrum-hamate joint presents two distinct patterns, termed TqH-1 and TqH-2, existing on a spectrum.
  • TqH-1 joints are helicoidal and double-faceted with complementary concave and convex surfaces.
  • TqH-2 joints are predominantly convex on the hamate and concave on the triquetrum, lacking a hamate groove or distal ridge.