Composite Materials for Maxillofacial Prostheses.
Annual progress rept. 30 Sep 77-8 Aug 78,
FRANKLIN INST RESEARCH LABS PHILADELPHIA PA
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The purpose of this program is to develop ultrasoft composite materials to be used as fillers in the fabrication of maxillofacial prostheses. The projected composite systems are elastomeric-shelled, liquid-filled microcapsules. Two experimental approaches were pursued toward making such microcapsules. One approach involves coaxial extrusion of a catalyzed elastomer precursor and core liquid into a rotating, graded-density bath. A major problem to be solved with this approach is how to break the stream into small, closed capsules. The other approach involves interfacial polymerization of polyurethane around droplets of polyglycols formed in a continuum containing diisocyanate. Problems encountered here include keeping the spheres separately suspended until curing is complete, and producing an elastomeric shell only rather than forming solid beads. Author
- Medicine and Medical Research