Arch form component

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A61C 700

Patent

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040501582

ABSTRACT:
Orthodontic arch form of wire, or other resilient materials, and method of making same, having a compound elliptical shape wherein the form is generated by plotting three foci falling at the apices of an isoceles triangle and utilizing a string or the like in a closed loop of a length greater than the sum of the sides of the triangle to be restrained at the foci during the recording of the form by movement of a recording instrument restrained by the string.

REFERENCES:
patent: 1481861 (1924-01-01), Eaton
Brader, Dental Arch Related with Intraoral Forces, American Journal of Orthodontics U61, No. 6, p. 541, June 1972.

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