Small plugs of healthful cartilage from non-weightbearing parts of a joint, including the facet with the knee, are taken off and applied to interchange little regions of damaged knee articular cartilage. It is frequently attributable to overuse or misalignment with the knee joint. Knee Bursitis - Knee bursitis is inflammation https://www.theorthopaedicandpainpractice.com/chondromalacia/