College of Massage Therapists of British Columbia (CMTBC) Practice Exam

What is the most frequently fractured carpal bone?

1. Triquetrum

2. Scaphoid

3. Lunate

4. Capitate

The correct answer is: Scaphoid

The scaphoid is the most frequently fractured carpal bone, primarily due to its location and role in wrist function. It is situated at the base of the thumb and is one of the largest bones in the proximal row of the carpal bones. Its position makes it prone to injury, particularly during falls when a person extends their hand to catch themselves. When the wrist is hyperextended, the scaphoid experiences significant forces, which can lead to fractures. Fractures of the scaphoid can be particularly concerning because they may not always be immediately evident on X-rays, leading to complications such as non-union or avascular necrosis if not treated properly. Identifying the scaphoid as the most commonly fractured carpal bone is significant for understanding wrist injuries, appropriate treatment approaches, and potential long-term outcomes for patients. The other carpal bones mentioned are indeed subject to fractures, but they occur less frequently than those of the scaphoid. Understanding the anatomical and mechanical factors contributing to these injuries helps to frame effective prevention and management strategies in sports, rehabilitation, and clinical practice.