Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2006-09-19
2006-09-19
Nutter, Nathan M. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C523S116000, C524S121000, C524S401000, C524S413000, C524S430000, C524S433000, C524S445000
Reexamination Certificate
active
07109254
ABSTRACT:
A method for producing a bioactive bone cement and a bone cement kit for anchoring artificial joints and for filling out bone defects. The method avoids polymerization-linked by-products and disadvantageous effects, while at the same time providing the bone cement with long-term stability. The inventive method uses a monomer-free polymethylmethacrylate, which is mixed with a suitable non-toxic solvent, and a bioactive, vitreous-crystalline material with a particle size ranging from >20 to 200 μm, having 15–45 wt. % CaO, 40–45 wt. % P2O5, 10–40 wt. % ZrO2and 0.7–3.5 wt. % fluoride, having apatite and calcium zircon phosphate as main crystal phases and a glass phase as an auxiliary component until a flowable mixture is obtained. The invention also relates to a bone cement kit having said components.
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Berger Georg
Müller Wolf-Dieter
Nagel Emil
Akerman & Senterfitt
BAM Bundesanstalt fuer Materialforschung und - pruefung
Humboldt-Universitaet Berlin, Charite Universitaetsklinikum (CCM
Nutter Nathan M.
Pendorf Stephan A.
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