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CERAMICS (Implant-tissue response (Hip implants (C-C, M-P, M-M), Non…
CERAMICS
What
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Definition: Solid inorganic compounds that
are formed by the application of heat, and sometimes
heat and pressure, comprising at least two elements provided one of them is a metal (or semi-metal)
and one or more non-metals
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Process and Properties
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Properties
Advantages :check:
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Very stable: High hardnes,, elect and thermical insulating, chemically stable, High melting T.
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Reactivity of implants
TYPE 3: Dense, non porous surface-reactive. Bond with bone (time dependent)
TYPE 2: Porous inert. Attaches with
bone ingrowth into pores. Increased
interfacial area leads to less movement
TYPE 1: Dense, nonporous, neraly inert.
Attach by bone growt,. Relative movement.
Developement of fibrous capsule. Deterioration
TYPE 4: Dense, non porous reabsorvable. Slowly replaced by bone