The advantage over traditional surgery is that only small incisions need to be made, and the joint does not have to be opened up fully. This reduces the recovery time of the patient.
The instruments used are also smaller. Surgeons watch what they are doing on a video monitor, and can diagonose and repair broken joint tissue. (e.g. ligaments, menisci.)
See also
This article is a stub. You can help Wikipedia by fixing it.