Concentric, double-puncture arthrocentesis using unwelded Y-shaped needle

Arthrocentesis was first described for the treatment of disorders of the temporomandibular joint (TMJ) in 1991, by Nitzan et al.1 Since then, it has been an effective treatment for managing internal derangement of the TMJ, particularly in patients with limited mouth opening and pain who have not responded well to conservative treatments.2 It includes irrigation of the upper joint space to allow inflammatory fluids to flow out of the joint and to relieve the adverse intra-articular pressure. Many methods of arthrocentesis of the TMJ have been designed to facilitate it and minimise the patient's discomfort.

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