Dentistry – Apparatus – Tooth selection guide
Patent
1984-07-16
1986-08-26
Wilson, John J.
Dentistry
Apparatus
Tooth selection guide
434104, 434 98, A61C 1910
Patent
active
046080155
ABSTRACT:
A shade guide for dental use comprising a pair of superimposed discs rotatable with respect to one another, one disc being a lower disc with a plurality of regions of different colors representative of different tooth discolorations of the patient, the other disc being an upper disc with a plurality of transparent regions representative of coloration of composite material adapted for being bonded to teeth. By relatively rotating the discs, the transparent regions of the upper disc successively cover the regions of different colors of the lower disc to provide a resultant coloration which neutralizes the discolored tooth and most closely matches the final coloration of the tooth of the patient.
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patent: 3184864 (1965-05-01), Johnson
patent: 3229385 (1966-01-01), De Pauw
patent: 3507042 (1970-04-01), Hana
patent: 4150485 (1979-04-01), Lee, Jr. et al.
patent: 4241520 (1980-12-01), Norton
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