Triquetral bone

Triquetral bone
Left hand anterior view (palmar view). Triquetral bone shown in red.
The left triquetal bone
Details
ArticulationsArticulates with three bones:
lunate laterally
pisiform in front
hamate distally
triangular articular disk which separates it from the lower end of the ulna.
Identifiers
Latinos triquetrum, os pyramidale
MeSHD051221
TA98A02.4.08.006
TA21253
FMA23715
Anatomical terms of bone

The triquetral bone (/trˈkwɛtrəl, -ˈkw-/; also called triquetrum, pyramidal, three-faced, and formerly cuneiform bone) is located in the wrist on the medial side of the proximal row of the carpus between the lunate and pisiform bones. It is on the ulnar side of the hand, but does not directly articulate with the ulna. Instead, it is connected to and articulates with the ulna through the Triangular fibrocartilage disc[1] and ligament, which forms part of the ulnocarpal joint capsule.[2] It connects with the pisiform, hamate, and lunate bones. It is the 2nd most commonly fractured carpal bone.

  1. ^ Manaster, B. J., Julia Crim "Imaging Anatomy: Musculoskeletal E-Book" Elsevier Health Sciences, 2016, p. 326.
  2. ^ Feger, Joachim. "Ulnotriquetral ligament". radiopedia.org. Retrieved September 28, 2022.