The hinge axis concept: a radiographic study of its relevance.
The "hinge axis concept" maintains that the mandible moves around a transverse horizontal axis through both condyles. Since it was introduced in the 1920s it has had a profound impact on clinical dental practices all over the world. By use of the radiographic subtraction technique, we demonstrated that an increase in the occlusal vertical dimension of 4 to 7 mm in the retruded position resulted in a small positional change (range 0.31 to 1.84 mm) in an unpredictable direction. Pure rotation did not occur; however, the condylar displacement is probably of minor clinical importance in prosthodontic restoration.
Hellsing
G
G
Department of Clinical Oral Physiology, Karolinska Institute, Huddinge, Sweden.
Hellsing
E
E
Eliasson
S
S
D000293:Adolescent; D000328:Adult; D016302:Centric Relation; D003768:Dental Occlusion, Centric; D005260:Female; D006801:Humans; D007574:Jaw Relation Record; D008297:Male; D008310:Malocclusion / Q000503:physiopathology / Q000628:therapy; D008334:Mandible / Q000000981:diagnostic imaging / Q000502:physiology; D008335:Mandibular Condyle / Q000000981:diagnostic imaging* / Q000502:physiology*; D017090:Occlusal Splints; D011859:Radiography; D012399:Rotation; D013382:Subtraction Technique; D013704:Temporomandibular Joint / Q000000981:diagnostic imaging / Q000502:physiology; D014716:Vertical Dimension