Abstract: The present invention relates to bone cements and, more particularly, to multi-solution bone cements and methods for making the same. An embodiment of the present invention provides multi-solution bone cements which include cross-linked PMMA beads, thereby providing for a significant increase in the polymer-to-monomer (P:M) ratio. Another embodiment of the present invention provides cross-linked PMMA beads which are surface modified with unsaturated carbon double bonds. A further embodiment of the present invention provides multi-solution bone cements made with PMMA-PMMA spherical brush polymers.

Abstract: A formulation including injectable biodegradable nanospheres and/or microspheres as a delivery system for chondroitinase ABC (cABC) or a functional derivative of cABC to treat acute and chronic spinal chord injury in a mammal having the same is provided. The biodegradable nanosphere/microsphere formulation releases cABC or a functional derivative of cABC in a time-released manner at the site of the spinal cord injury. cABC infusion can promote axon regrowth and some behavioral recovery. The nanospheres and/or microspheres provided herein include cABC or a functional derivative of cABC loaded within and/or on a biodegradable polymer matrix. In some embodiments of the present invention, the surface of the biodegradable polymer matrix can be modified to target a specific scar site. In addition to providing a nanosphere formulation that include polymeric incorporated cABC, a method of treating a mammal having a spinal cord injury is also provided.