钛表面多孔螺旋种植体的实验研究

Studies on the titanium porous-surfaced screw im-plant

表面多孔种植体可以大大增加其与骨的接触面积，降低了种植体－骨界面的应力，使应用力更加分散，骨可长入表面孔隙中，加强了种植体与骨的结合力。作者采用纯钛粉等离子喷涂方法制成钛表面多孔种植体，植入拔除下颌前磨牙３个月后狗的下颌骨中，于植入后１、２、４、８、１２周对种植体－骨界面行组织学光镜、扫描电镜及力学测试等方法观察。结果表明：骨逐渐长入种植体表面孔隙中，并与钛表面形成骨性结合，所承受的剪切强度明显高于同等规格的表面光滑种植体。提示：钛表面多孔螺旋种植体组织相容性良好，具有较优的力学性能。

AbstractTitanium porous-surfaced screw implant was madeby plasma-spray with Ti powder. The pore size was 80～300μm. Two groups of implants were implanted inthe mandibles of 15 dogs. Group A: porous-surfacedscrew implant; Group B: smooth surface screw im-plant. The bone healing was evaluated by L. M , SEM.and shear strength testing. The results show that theosteo integration of two groups were completed after 12weeks. The bone grew into porous surface. The shearstrength of group A was significantly higher than thatof group B.