Burnett B-Directional TMJ Device helps acquire dynamic MR images by precisely opening and closing the jaws. Audible click indicates 1-mm movement of the mouthpiece. Imporved strength and tracking method. Scale indicating distance between mouthpieces up to 55 mm. Simple, one-handed operation, reduced motion artifacts, virtually eliminates device flex for better images. One-year warranty. Includes three sets of disposable mouthpieces. MR-conditional to 3T.