The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 1989
Filed:
Oct. 07, 1987
Minoru Ai, Tokyo, JP;
Kenji Hiranuma, Nagoya, JP;
Jinichi Obana, Tokyo, JP;
Toshio Ito, Kasugai, JP;
G-C Toshi Kogyo Corporation, Kasugai, JP;
Abstract
An artificial tooth has a length of its buccal side substantially equal to that of a natural tooth and a length of its lingual side in the range of 4.0 mm to a length shorter than the length of its buccal side by at least 2.5 mm. A basal surface is of a concave shape in engagement with a more convex shape than the shape in cross-section of the alveolar ridge. One or two proximal surfaces of the basal surface is or are provided at the substantial center with an occlusally inclined smooth groove having a width of 1.5 to 5.0 mm, a maximum depth of 0.5 to 3.0 mm, and an proximal upper end located away from the highest position. The occlusal surface has a mesiodistal length substantially equal to that of a natural tooth and a W.sub.2 /W.sub.1 ratio falling in the range of 55 to 95% of that of a natural tooth, wherein W.sub.1 is the mesiodistal length and W.sub.2 is the buccolingual length.