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Intradiscal injection of BIOSTAT BIOLOGX Fibrin Sealant with the Biostat Delivery Device appears safe and may improve pain and function in selected patients with discogenic pain.

Polycarbosilane was modified by reaction with an aluminum alkoxide to get a precursor for Si-At-C-0 ceramics. The precursor was essentially characterized by magic-angle spinning nuclear magnetic resonance ("Si, "Al, and I3C) and appeared as a dispersion of Al(OH)3-based particles in a polycarbosilane chain matrix. After the material was heattreated under argon at 1500°C, X-ray diffraction showed that it crystallized mainly as Sic 2H. The presence of this rather unusual polytype for polycarbosilane-derived ceramics seemed to be related to the presence of aluminum atoms.