It was tried to prepare the carbon dental implant having a fine Rahmen surface (FRS) layer from oxidized PAN fiber (OF).Initially, the mechanical properties of the carbon core materials prepared from OF was examined.The unidirectional (UD)-CFRC bar (2 mm in diameter) was prepared by the carbonization of OF reinforced plastic (OFRP) bar which was composed from OF and phenol resin containing some amount of graphite powder.The carbonization was carried out up to 1000°C under N2.The resulting CFRC bar is 270 MPa in flexural strength, 98 GPa in flexural modulus and 270 MPa in compressive strength.These values are thought to be sufficient for the core material of the dental implant.From the observation of cross section, it was found that the carbonized OF and matrix carbon were united so initimatelly that the further densification treatment is not necessary.
The precursor of FRS implant was formed by wrapping up OF paper around the OFRP bar with a small amount of furan resin, and then carbonized up to 1000°C under N2.The FRS implant was performed through the infiltration of low temperature pyrolytic carbon (LTPC) using cis-1, 2-dichloroethylene as the row material by electrolytic method, on the carbonized precursor.Optical and scanning electron micrographs of surface and cross section of the FRS implant showed the typical FRS structure which was united the core material.
