Dentistry – Apparatus – Having gauge or guide
Patent
1987-05-14
1988-08-09
Wilson, John J.
Dentistry
Apparatus
Having gauge or guide
433 3, 33514, A61C 1904
Patent
active
047624914
ABSTRACT:
A hand-operated dental measuring instrument used particularly by orthodontists, dentists, and technicians for rapidly indicating and/or monitoring the incisor tooth labial inclination, which is the inclination of the incisor crown to occlusal plane, of a patient's natural teeth or the plaster cast reproductions of a patient's mouth. The procedure can be carried out before, during, and after orthodontic treatment. A dial indicator is fitted with a custom designed indicator arm tip and a dial face, which comprises the active portion of components which are mounted on a rigid injection molded base, which is the passive portion. When the base is brought into contact with the biting surfaces of a patient's natural teeth or reproductions of the teeth, known as dental casts, the indicator arm tip is adjusted to contact the anterior surface of an incisor tooth. By means of right angle geometric principles, the inclination of the incisor crown to the perpendicular is measured and converted from a linear measurement to degrees and is called the incisor labial inclination.
REFERENCES:
patent: 2465618 (1949-03-01), Tully
patent: 2787837 (1957-04-01), Gelfand
patent: 3745665 (1973-07-01), Shilliday
patent: 3839801 (1974-10-01), Tappe
patent: 3900953 (1975-08-01), Posen
Mattern Jr. Roy E.
Wilson John J.
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