Arthroscopic: several small incisions (cuts) are made over the joint in front of the ear. A small telescopic instrument with a tiny camera attached (arthroscope) is inserted, allowing the surgeon a view of the joint. Small instruments can be inserted into the other cuts to free up the joint by e.g. removing adhesions and scarring, or repositioning a disc.
Arthroplasty (Open Surgery): an incision is made in front of the ear, giving the surgeon access to reconstruct the joint by e.g. smoothing joint surfaces, repairing discs or removing diseased tissue. If a joint replacement is necessary, a second incision under the angle of the jaw may be required.