Original sentence: Although some studies have indicated that some of the earlier MIS approaches are less effective than the Direct Anterior THR this issue is by no means settled and remains controversial among orthopaedic surgeons.Some surgeons advocate the newer anterior (also known as direct anterior) approach for MIS THR as it is the only technique that does not detach muscle from the pelvis or the femur
Edited sentence: The anterior approach for MIS THR is the only technique that does not detach muscle from the pelvis or the femur