Which grade of sprain involves moderate instability of the joint?

A Grade 2 sprain is characterized by moderate instability of the joint, resulting from a partial tear of the ligament. This indicates that the ligament is compromised, leading to some loss of function and stability. Symptoms typically include moderate pain, swelling, and difficulty with joint movement.

In contrast, a Grade 1 sprain involves a slight stretch or overextension of the ligament without significant loss of stability. A Grade 3 sprain entails a complete tear of the ligament, resulting in severe instability and often necessitating surgical intervention. The term Grade 4 sprain is not commonly used in classification and does not correspond to a recognized standard for sprain grading within the context of athletic injuries.

Understanding these distinctions is crucial for appropriate diagnosis and treatment, as they guide management strategies and rehabilitation protocols.