The simple diagnostic arthroscopy in the out-patient clinic was developed and applicated to 28 patients (30 joints) with closed lock of the temporomandibular joint. The equipments were the needle arthroscope of 0.9 mm in diameter, its cannula, and the mandlin. The technique was consisted of superior compartment puncture by a 20 gage needle, local anesthesia by a pumping action, insertion of the mandlin through the needle, switching the needle to the cannula as a guide for the mandlin, and diagnostic arthroscopy under the circulation of saline.On all of 30 joints, the technique was completed successfully and safely, without any severe complications.
This technique will expand via its diagnostic arthroscopy indication, similar to another diagnostic imaging.