Isolated MCL sprains usually heal with conservative management which typically includes a brace to protect the healing ligament and a rehabilitation program. Even those with ACL tears respond frequently with healing to acceptable laxity after the ACL is reconstructed. For the rare MCL tear which does not heal with conservative measures there are techniques for reconstruction, . Those at risk for problems with MCL healing are those with extreme generalized laxity, especially if the knee has alignment that places stress on the healing ligament (knock-knee or valgus knee)