Complex sentence: The second study noted in the L.A. Times piece focused on adults and questioned whether an ACL reconstruction was necessary when an MRI-is not merely an existing tear; many patients without instability, buckling or giving way after a course of rehabilitation can be managed non-operatively.
Split into simpler sentences: The second study noted in the L.A. Times piece focused on adults and questioned whether an ACL reconstruction was necessary when an MRI-documented tear exists. But the indication for ACL reconstruction is not merely an existing tear; many patients without instability, buckling or giving way after a course of rehabilitation can be managed non-operatively.