What grade is considered a "flexion contracture" in Dupuytren's Contracture classification?

In the context of Dupuytren's Contracture classification, a "flexion contracture" refers to the inability to fully extend a finger due to the shortening of the fascia in the palm and fingers. Specifically, a contracture is classified based on the degree of flexion at the metacarpophalangeal (MCP) joint and the proximal interphalangeal (PIP) joints.

Grade 3 signifies a significant degree of flexion contracture, typically defined as a contracture of 45 to 89 degrees at the MCP joint. This level of contracture indicates that the individual experiences a notable limitation in hand function, requiring potential intervention or surgery. Grade 2, for example, involves less severe contractures (20 to 44 degrees), while Grade 4 represents a more severe condition (90 degrees or more). Therefore, Grade 3 is the correct designation for what is considered a "flexion contracture," as it denotes a considerable impact on the patient's ability to extend their fingers, which is essential for hand function.