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The morphologic and morphometric features of the triquetrum.
A Balci1, G Yildiran2, S Kendir1
1Department of Anatomy, Faculty of Medicine, Ankara University, Hacettepe Mah. A. Adnan Saygun Cad. Kizilay Sk. No: 6, 06230, Altindag, Ankara, Turkey.
Hand Surgery & Rehabilitation
|November 18, 2022
Summary
Triquetrum bone fractures are common, but their morphology and vascular supply are poorly understood. This study details triquetrum anatomy, revealing dorsal vascular predominance that may explain fracture patterns and aid surgical approaches.
Area of Science:
- Orthopedic surgery
- Anatomy
- Radiology
Background:
- Triquetrum fractures are the second most frequent isolated carpal bone fractures.
- Detailed triquetrum morphology and morphometry data are limited.
- Understanding vascular supply is crucial for fracture healing and surgical intervention.
Purpose of the Study:
- To characterize triquetrum morphology using anatomical landmarks.
- To evaluate the morphometric features of the triquetrum.
- To identify and map the vascular entry points (nutrient foramina) of the triquetrum.
Main Methods:
- Morphological and morphometric analysis of 87 adult dry triquetral bones.
- Measurement of bone length, width, and thickness.
- Recording the number and location of nutrient foramina (>0.5 mm).
Main Results:
- Mean dimensions: length 17.37 mm, width 12.65 mm, thickness 11.41 mm.
- Pisiform facet shapes varied: oval (40), round (8), amorphous (39).
- Nutrient foramina were significantly more numerous on the dorsal aspect.
Conclusions:
- The dorsal predominance of nutrient foramina may contribute to dorsal triquetrum weakness and fracture prevalence.
- Rich dorsal vascularization might reduce avascular necrosis risk in triquetrum fractures.
- Surgical procedures on the triquetrum require caution due to its dorsal vascularization pattern.
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