title: [The Crozat technic--considerations of materials and instrument mechanics].
abstract: An orthodontic wire for Crozat appliance meets special requirements. A high value for the yield strength is necessary as well as a remarkable plastic strain. In order to bent a spring over a considerable distance with a small stress resulting a low modulus of elasticity will be advantageous. Besides this properties a special wire developed on the basis of precious metals may be repeatedly softened and hardened by a simple method of heat treatment. Research was done about the forces transmitted from the body wire of a Crozat appliance to the opposite molars. For the case of a simplified lower body wire a formula was derived which allows to calculate the applied force.
mesh_terms: D055592:Biophysical Phenomena; D001703:Biophysics; D003799:Dental Stress Analysis; D004548:Elasticity; D006801:Humans; D008670:Metals; D009967:Orthodontic Appliances; D009971:Orthodontics, Corrective / Q000295:instrumentation*
chemical_list: D008670:Metals
vernacular_title: Crozat-Technik--Eine Betrachtung über Werkstoffe und Mechanik der Geräte