Which grade of ligament injury presents with a firm endpoint with no change in laxity compared with the contralateral knee?

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A grade 1 ligament injury is a mild sprain with no significant tearing of the ligament fibers. It presents with minimal swelling and tenderness, and there is a firm endpoint with no change in laxity compared with the contralateral knee. Grades 2 and 3 involve partial and complete tearing of the ligament fibers, respectively, and present with varying degrees of instability and laxity. Grade 4 injuries involve a complete tear of the ligament and may result in significant joint instability.

Which Grade of Ligament Injury Presents with a Firm Endpoint