| 摘要 |
The present invention provides for faster and stronger tissue-implant bonding by treating a ceramic implant with an ion beam to modify the surface of the ceramic. The surface modification can give the ceramic improved ion-exchange properties depending upon the particular ceramic and the type of ions used. In a preferred embodiment, a bioactive ceramic orthopaedic, dental, or soft tissue implant is bombarded with a beam of cations. When implanted in the body, the surface modification causes an increase in the release of critical ions, such as calcium or phosphorus, from the surface of the ceramic implant, and thereby accelerates implant-tissue bond formation. The mechanism and rate of the ion-exchange reaction, and the type and quantity of ions released by the ceramic, can be controlled by: (a) varying the depth to which the ions penetrate by varying the energy of ion bombardment or the angle of the ceramic surface related to the ion beam; (b) varying the fluence (or ions per unit area) of the ion beam; and (c) varying the type and combination of ions used.
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