title: Elements of a general theory of joints. 4. Coupled joints as simple gear systems.
abstract: In the present article the relative motion in the horizontal plane of 2 adjacent lumbar vertebrae (axial rotation of the lumbar spine) and the cranial border movement of the mandible parallel to the vertical-sagittal plane are examined. The interplay of joints is depicted onto the function of a gear system with positive drive. The limits of this projection are described.
authors.affiliation: Department of Orthodontics, Institut of Physics Georg August University Göttingen, FRG.
authors.forename: D
authors.initials: D
authors.lastname: Kubein-Meesenburg
authors.forename: H
authors.initials: H
authors.lastname: Nägerl
authors.forename: J
authors.initials: J
authors.lastname: Fanghänel
mesh_terms: D006801:Humans; D007596:Joints / Q000502:physiology*; D008159:Lumbar Vertebrae / Q000502:physiology*; D008334:Mandible / Q000502:physiology*; D013284:Stomatognathic System / Q000502:physiology*