No coin nor oath required. For personal study only.
Wcrkstoffc und Korrosion 43, (1992) includes a reservoir for the test substance whose bone formation promoting properties are to be tested. The reservoir is connected to the bone tissue ingrowth channel through a capillary aperture. so-called diffusion capillary, for supply of the test substance without simultaneous liquid flow.-USPTO T. Albrektsson, P. Aspenberg. Nobelpharma. 14 Nov. 1989, [in English]. Patent no. US4880006 (USA), Convention date 23 Nov. 1987.
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