A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
3/100, 25/99
A61F 1/00 (1980.01)
Patent
CA 1117255
ABSTRACT OF THE DISCLOSURE The disclosure describes a method for the preparation of implants from ceramic substances, especially with a porous surface stimulating the ingrowth of bone tissues, by introducing a model of the implant into a high-temperature embedding substance which has been mixed to a paste and leaving it in this until the embedding substance hardens and a negative mold of the implant is produced. After removal of the model the mold is lined via an opening reaching into its interior with a layer of a ceramic sub- stance which should form the outer layer of the implant. The cavity of the mold is subsequently filled completely with dentine or core substances, the opening is then sealed with a high-temp- erature embedding substance, mixed to a paste, the embedding sub- stance is allowed to dry and the whole thing is then heated to the sintering temperature of the ceramic substances used and the ceramic substances fired at this temperature for the usual time. The disclosure also describes an implant of ceramic substances and having a porous outer layer. The porous outer layer consists of a ceramic substance according to the DE-OS 2711 219 with an addition of substances stimulating bone formation and/or bone growth in a quantity of 5 - 70 wt. % relative to the dry content of the ceramic substances, especially tri-calcium phosphate and tertiary calcium phosphate.
319327
Scheicher Hans
Swabey Ogilvy Renault
LandOfFree
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