Surgery may be necessary in some cases. Your surgeon or physician may recommend arthroscopic surgery to assess the extent of the injury and smooth the surface of the cartilage. Other procedures to correct alignment of the kneecap may be undertaken simultaneously.Check with your doctor before beginning any sport or exercise routine. Strengthening the inside part of the thigh muscles can often help prevent this injury. Also, stay away from activities that require deep knee bending especially if you are at risk for chondromalacia patellae or already have low-grade knee symptoms.