In the context of splinting the hand, what is the purpose of keeping the MCP joints partially flexed?

• A. To enhance circulation
• B. To prevent joint stiffness
• C. To maintain collateral ligament length
• D. To allow for digital motion

Answer: (C)

The purpose of keeping the metacarpophalangeal (MCP) joints partially flexed during splinting is primarily to maintain the length of the collateral ligaments. The collateral ligaments of the MCP joints are crucial for joint stability and function. When the MCP joints are held in a flexed position, it allows for optimal tension and length in these ligaments, preventing them from becoming shortened or contracted due to prolonged immobilization.

This positioning helps to avoid complications such as joint stiffness and ensures that the ligaments are properly elongated, which is vital for restoring functional range of motion once rehabilitation begins. Maintaining collateral ligament length is essential in the healing process as it supports the integrity of the joint and aids in re-establishing normal biomechanics during movement.

While aspects like circulation, joint stiffness, and digital motion are all important considerations in splinting, the primary rationale for keeping the MCP joints partially flexed is specifically focused on protecting and maintaining the integrity of the collateral ligaments.