【摘要】 目的　评价重组人骨形成蛋白 - 2 (rh BMP- 2 )与胶原复合物在大鼠颅骨表面的成骨作用。方法　用 SD大鼠 9只在两侧颞部各制备一骨膜下袋后 ,分为实验侧和对照侧。右侧植入 rh BMP- 2与胶原复合物为实验侧 ,左侧植入单纯胶原作为对照 ,分别于术后 2、4及 8周处死动物各 3只 ,取标本制作脱钙石蜡切片 ,观察成骨情况 ,并测量成骨厚度。结果　 rh BMP- 2与胶原复合物可在颞骨表面通过膜内成骨的方式诱导新骨形成 ,并与颞骨外板良好结合 ,术后 2周 ,植入物大部分降解吸收 ,颞骨表面有大量新生骨 ;术后 4周 ,植入物完全为新骨代替 ,颞骨厚度约为厚原度的 5倍 ;术后 8周 ,新骨更加成熟 ,颞骨厚度约为原厚度 2 .8倍。而对照侧骨质在术后各周均无明显增厚。结论　 rh BMP- 2与胶原复合物可作为良好的表面植骨替代材料 ,并能与植骨床良好结合更多还原

【Abstract】 Objective To evaluate the bone regenerative potential of reconbinant human bone morphogenetic protein 2(rhBMP 2) / collagen on adult rat calvarial bone. Methods A tight subperiosteal pocket was produced under both sides of the temporal muscle in rats. rhBMP 2 / collagen was implanted in one side and collagen alone was implanted in the other side as control. The rats were sacrificed 2, 4 and 8 weeks after operation. The specimen was harvested and examined histologically. For morphometric analysis, the thickness of the temporal bone of both sides was measured and compared. Results The rhBMP 2 / collagen onlay implant resulted in active bone formation and the augmented bone was connected directly with the original bone, whereas the collagen alone resulted in neither bone nor cartilage production. The ossification process in the rhBMP 2 / collagen occurred directly through bone formation, similar to intramembranous ossification. Conclusion rhBMP 2 / collagen is an effective material as a biological onlay implant.更多还原