New concepts in the reconstruction of mandibular defects following tumor resection.

The results of experiments with a new reconstruction plate used to bridge defects in irradiated and nonirradiated mandibles of dogs are presented. The principles of fixation of the plate with hollow titanium powder-sprayed screws and a titanium mesh for stabilizing the autologous cancellous bone are discussed. The direct contact between the surface of the screw and the bone, as well as proliferation of bone into the hollow screw, are demonstrated by light and scanning electron microscope studies. Autologous cancellous bone fixed with the new mesh leads to bridging of the defect even in irradiated areas.