| 摘要 |
1,108,922. Artificial teeth.SWISSEDENT INTERNATIONAL. 3 May, 1965 [4 May, 19641. No. 18590/65. Addition to 1,022,367. Heading A5R. A denture comprises opposed upper and lower artificial teeth 22, 20, each tooth having a concavity 40, 38 and a cutting ridge 36, 34 at one side of the concavity, each pair of opposing teeth being so arranged in the denture that the ridge 34 of the lower tooth engages the concavity 40 of the upper tooth 22 while the ridge 36 of the upper tooth 22 is spaced from the concavity 38 of the lower tooth 20 by 0.5 mm. to 4 mm. The ridges of the upper teeth 22 are arranged in a continuous line near to the lingual side of the teeth, the ridges in the lower teeth 20 forming a continuous line near to the buccal side of the teeth. The masticating surface of each tooth comprises the ridge, the concavity and a flat surface 45, 43 which merges smoothly into the concavity. The edge of each masticating surface opposite to the ridge is formed as a convexity 44, 42 or a shanp corner (Fig. 4, not shown), which adjoins the appropriate side of the tooth. A groove 48, 46 is formed in the concavity and flat surface portions of each tooth transversely to the ridge. |
