| 摘要 |
PCT No. PCT/JP90/01094 Sec. 371 Date Jun. 11, 1991 Sec. 102(e) Date Jun. 11, 1991 PCT Filed Aug. 29, 1990 PCT Pub. No. WO91/03213 PCT Pub. Date Mar. 21, 1991.The present invention relates to an artificial ceramic dental root, wherein the outer circumference portion of the main body of the artificial dental root which has been implanted in the jaw bone is integrally formed of ceramic material; the diameter of a dental neck-corresponding portion of the artificial dental root extending from a part inserted into the top of the jaw bone to at least a part of the dental neck is made larger than that of a base; and a tapered portion is provided between said base and the dental neck-corresponding portion, whereby stress concentration is relieved and the artificial dental root is obtained which is highly resistant to outer forces, especially a force in an oblique direction. Even when a ceramic coated layer is layered over a metallic core to form a layer structure, the ceramic layer is prevented from coming off.
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