[Osseontegration of trial implants of carbon fiber reinforced plastics].
OBJECTIVE
To what extent are carbon fibre-reinforced plastics (CFRP) suitable as an osseous integration surface for implants?


METHODS
CFRP test implants having a plexus-structured, rhombus-structured, and plexus-structured, hydroxyapatite surface were implanted in the femura of mini-plgs. Exposure time lasted 12 weeks. The implants were subjected to a macroradiological, a histological-histomorphometrical, and a fluorescence-microscopical evaluation.


RESULTS
One half of the uncoated, plexus-structured implants were not osteointegrated, the other half displayed an osteointegration rate of 11.8% in the spongy area and 29.8% in the cortex layer. The HA-coated test implants showed an osteointegration of 29.5% in the spongiosa and 56.8% in the cortex layer. The rhombus-structured test implants had an osteointegration of 29.2% (spongiosa) and 46.2% (cortex layer).


CONCLUSIONS
Compared to the osteointegration of metallic, especially titanium surfaces the CFRP surfaces tested by us fared worse, especially the uncoated, plexus-structured surfaces. For this reason we view very critically the use of carbon-fibre reinforced plastics together with the surfaces tested by us as osteointegrating surfaces.
Schreiner
U
U
Orthopädische Universitätsklinik Mannheim. Ute Schreiner@ortho.ma.uni-heidelberg.de
Schwarz
M
M
Scheller
G
G
Schroeder-Boersch
H
H
Jani
L
L
D000818:Animals; D001842:Bone and Bones / Q000473:pathology*; D002209:Caprolactam / Q000031:analogs & derivatives*; D002244:Carbon; D000077482:Carbon Fiber; D020099:Coated Materials, Biocompatible; D017886:Durapatite; D005269:Femur / Q000473:pathology; D008422:Materials Testing; D008856:Microscopy, Fluorescence; D016348:Osseointegration / Q000502:physiology*; D011108:Polymers; D011474:Prosthesis Design; D019919:Prosthesis Implantation; D013552:Swine; D013556:Swine, Miniature
D000077482:Carbon Fiber; D020099:Coated Materials, Biocompatible; D011108:Polymers; C009916:nylon 6; D002209:Caprolactam; D002244:Carbon; D017886:Durapatite
Knöchernes Einwachsverhalten von Probekörpern aus kohlefaserverstärktem Kunststoff.