HA/TCP双相陶瓷肌内长期植入诱导成骨的实验观察

Osteogenesis of HA/TCP Biphasic Ceramics Implanted into Muscle: a Long-Term Study

通过肌内长期植入研究了 Ca- P生物材料骨诱导性及诱生新骨的生长状况。HA/ TCP多孔陶瓷植入狗背部肌内 15月后 ,植入体为一层很薄的纤维结缔组织膜包裹。 3种形态的组织 ,即间充质组织、骨和骨髓在植入体内部孔中有规律地分布 :植入体内部所有的孔中都有骨组织存在 ;但中部内孔中的骨为较成熟的板状骨 ,有明显的骨陷窝 ,已形成髓腔和骨髓 ;边缘外孔中的骨组织为未成熟的编织骨 ,与间充质组织相连 ,无髓腔和骨髓形成。这表明 HA/ TCP具有骨诱导性 ,在非骨环境中确实能够诱导成骨。而且 ,各种组织有规律地分布在植入材料孔中 。

New bone formation in long-tem intramuscle implant of Ca-P biomaterial was investigated in this experiment. After implanting into dog dorsal muscle for 15 months, a thin fibrous membrane that wrapped HA/TCP implant was still observed obviously. Three types of tissues, i.e. mesenchymal tissue, bone and bone marrow, regularly distributed in different pores of implant. Nearly all the pores of implants were occupied by bone. Bone in the pores located in the central region of implant was matured lamellar bone characterized by obvious lacuna and rich bone marrow. However, bone in the peripheral pores was immature woven bone without bone marrow formation. Furthermore, mesenchymal tissues only exist in the peripheral pores and usually were connected with immature woven bone. It was demonstrated that porous HA/TCP has bone inductivity and it could induce new bone formation at non-osseous site. Well-regulated distribution of mesenchymal tissue, bone and bone marrow in the pores suggest bone morphogenesis in the implant must obey a specific space-time program.