下颌骨缺损的植骨一段是用整块的髂骨和一段肋骨,但很难适应面部外形,而且还有吸收和变形。因此,有以硬质金属托为支架作碎骨移植者,但这种金属托在手术时不仅需要一套特殊设备,而且操作复杂,作者介绍一多种混合塑料托作为碎骨移植的支架,在动物实验和人体应用中均已获得成功。这种混合塑料托系用成品网(Dacron网)与聚醚氨基甲酸乙酯弹性体所组成,成品网是用氨基甲酸乙酯催化剂饱和后衬在聚乙烯 Mandibular defect bone graft is a piece of the ilium and a section of ribs, but difficult to adapt to the facial shape, but also absorption and deformation. Therefore, there are hard metal bracket for bone graft for bone transplant, but this metal tray in surgery requires not only a special set of equipment, and the operation is complicated, the author introduced a variety of mixed plastic care as a bone graft stent, In animal experiments and human applications have been successful. This hybrid plastic care system with the finished net (Dacron net) and polyether urethane elastomer composition, the finished net is saturated with urethane catalyst lining polyethylene