摘要
目的 :观察重组人骨形成蛋白 - 2复合胶原I的盖髓效果和对牙髓组织骨钙素含量的影响 ,探讨牙髓细胞分化和修复性牙本质形成的机制 ,为临床筛选理想的盖髓材料提供实验依据。方法 :以 30只猫为实验对象 ,机械暴露牙髓后 ,分别用重组人骨形成蛋白 - 2复合胶原I、氢氧化钙、胶原及对照的牛血清白蛋白盖髓 ,运用组织学方法观察牙髓修复性牙本质的形成及牙髓组织学改变 ,采用放射免疫分析技术检测盖髓后 1周、2周、4周时牙髓组织骨钙素的含量。结果 :与氢氧化钙、胶原和牛血清白蛋白盖髓比较 ,用重组人骨形成蛋白 - 2复合胶原I盖髓 ,能形成完整的管样牙本质桥 ,牙髓组织骨钙素的含量显著多于正常牙髓。结论 :重组人骨形成蛋白 - 2复合胶原I盖髓可诱导形成完整的牙本质桥 ,显著增加牙髓组织骨钙素的含量。重组人骨形成蛋白 - 2复合胶原I作为生物活性盖髓剂 ,起到良好的活髓保存效果 ,值得临床推广应用。
AIM: To assess the effect of recombinant human bone morphogenetic protein-2 (rhBMP-2) combined with type I collagen on pulp capping in cats. METHODS: Freshly exposed pulps of thirty cats were capped with four different pulp capping agents: rhBMP-2/collagen I, calcium hydroxide, type I collagen and bovine serum albumin as control. The reparative dentinogenesis and osteocalcin content were assessed after 1 week, 2 weeks and 4 weeks by means of histology and radioimmunoassay. RESULTS: the pulpal tissues of the teeth capped with rhBMP-2/collagen showed mild inflammation and odontoblast differentiation with tublar dentin bridge on the exposed site. The level of bone γ-carboxyglutamic containing protein(BGP) in the group of rhBMP-2 with collagen I was significantly higher than that of the other three groups (P<0.01). CONCLUSTION: rhBMP-2 combined with type I collagen is a bioactive pulp-capping agent and has a great worth in vital pulp therapy.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2003年第4期522-525,T004,共5页
Chinese Journal of Pathophysiology
基金
广东省医学科学技术研究基金资助项目 (No .A2 0 0 0 315 )
