Which statement best describes the stability of the DIP joint compared to the PIP joint?
Understand the Problem
The question asks about the comparative stability of the distal interphalangeal (DIP) joint versus the proximal interphalangeal (PIP) joint in the fingers, focusing on anatomical factors contributing to their respective stabilities. The question requires knowledge of hand anatomy, specifically ligaments and bony structures of the fingers.
Answer
The DIP joint is generally more stable than the PIP joint.
The DIP joint is generally more stable than the PIP joint due to its strong collateral ligaments and surrounding structures.
Answer for screen readers
The DIP joint is generally more stable than the PIP joint due to its strong collateral ligaments and surrounding structures.
More Information
The DIP joint's stability arises from its anatomical structure, including strong collateral ligaments. The PIP joint, while also stable in the sagittal plane, is more susceptible to angular, axial, and rotational stress.
Tips
A common mistake is assuming both joints have equal stability. Remember the DIP joint is inherently more stable due to its structure.
Sources
- Osteoarthritis of the Distal Interphalangeal Joint - ScienceDirect.com - sciencedirect.com
- [PDF] Distal Phalangeal and Fingertip Injuries - Dr Leo Rozmaryn - leohanddoc.com
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