Tooth shade selection using a new comparator

Details Tooth shade selection using a new comparator Tooth shade selection using a new comparator

1989-12-06

1991-10-08

Wilson, John J.

Dentistry

Apparatus

Tooth selection guide

433 29, 433215, A61C 1910, A61C 100, A61C 300, A61C 500

Patent

active

050550403

ABSTRACT:
A tooth shade comparator comprises a viewing tube having a removable base at one end thereof and having an eyepiece at the opposite end thereof. The base is constructed for placement over a tooth in the mouth of a patient and has an opening for exposing the tooth to the interior of the viewing tube while excluding ambient light from the tooth. The base also has a slit for receiving a shade guide element that is placed side by side with the patient's tooth. The tooth and the shade guide element are illuminated by an electric lamp through an opening in the side wall of the tube. The eyepiece includes a lens that provides a magnified image of the tooth and the shade guide element. Half tone filters may be inserted in a light path between the shade guide element and the eyepiece. A set of removable bases having different arrangements of openings and slits provides versatility for shade comparison with different teeth.

REFERENCES:
patent: 1601616 (1926-09-01), Friese-Greene
patent: 3436157 (1966-05-01), Adler et al.
patent: 4618325 (1986-10-01), Appelle

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