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  • Title: The hinge axis concept: a radiographic study of its relevance.
    Author: Hellsing G, Hellsing E, Eliasson S.
    Journal: J Prosthet Dent; 1995 Jan; 73(1):60-4. PubMed ID: 7699602.
    Abstract:
    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.
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