Chondroplasty is performed to smooth damaged cartilage in the knee in order to lessen friction in the joint. The surgeon removes damaged tissue so that healthy cartilage will grow to replace it. This procedure can be performed alone or in conjunction with other procedures.The ends of the bones that meet to make the knee joint are covered in articular cartilage, a smooth tissue that serves to provide a low friction surface for the structures in the knee. This smooth surface can be made rough if damaged, which can be the result of a number of conditions, including trauma, degenerative conditions like arthritis, and others. Symptoms of damaged cartilage in the knee can include joint pain, stability problems like the knee giving, and popping or locking. These symptoms can be treated with knee arthroscopy and chondroplasty.