The pneumatic sponge-hinge axis locator.
D003725:Dental Articulators; D003748:Dental Equipment; D003768:Dental Occlusion, Centric; D006801:Humans; D007574:Jaw Relation Record; D008334:Mandible / Q000033:anatomy & histology; D008335:Mandibular Condyle / Q000033:anatomy & histology