不同程度的骨挤压对犬松质骨的生物力学影响  

Biomechanical effect of different degree of squeezing on the cancellous bone of dogs

作　　者：傅云婷 汪永跃[2] 左艳萍[3] 周颖 FU Yunting WANG Yongyue ZUO Yanping ZHOU Ying(Department of Stomatology, Shenzhen Longgang E. N. T. Hospital,Shenzhen Key Laboratory of E. N. T. , Shenzhen 518172, China Department of Dental Implants, West China College of Stomatology , Sichua Unwersity Department of Stomatology ,Xi ＇ an Medical Untversity Department of Stomatology , Chengfei Hospital)

机构地区：[1]深圳市龙岗区耳鼻咽喉医院口腔科深圳市耳鼻咽喉疾病重点实验室,深圳518172 [2]四川大学华西口腔医学院种植科 [3]西安医学院口腔医学系 [4]成飞医院口腔科

出　　处：《山西医科大学学报》2017年第7期691-694,共4页Journal of Shanxi Medical University

基　　金：深圳市重点实验室项目(ZDSYS201506050935272)

摘　　要：目的比较骨挤压技术对种植体-骨界面结合强度的影响。方法选取成年杂种犬12只,建立松质骨挤压的动物模型,分别于其股骨髁处的松质骨内用敲击式柱状挤压器按照0,0.6,1.2,2.0 mm的挤压程度逐级挤压、植入48颗柱状种植体,在术后1,2,4,12周时取材,通过种植体推出试验测试种植体-骨界面的结合强度。结果松质骨经挤压植入种植体后,在1,2周2.0 mm挤压程度组的松质骨剪切强度明显高于0,0.6,1.2 mm组(P<0.05)。4周和12周各组之间剪切强度的差异没有统计学意义(P>0.05)。结论骨挤压技术能够明显改善松质骨的生物力学特性,可能有益于提高种植体的初期稳定性。Objective To explore the effect of the squeezing technique on the bonding strength of the implant-bone interface. Methods Twelve adult mongrel dogs were chosen randomly to establish an animal model of squeezed cancellous bone. Forty-eight cylindrical implants were installed into the cancellous bone after it was prepared by knocking and squeezing technique according to different squeezing extent（ 0,0. 6,1. 2 and 2. 0 mm）. The samples were taken at 1,2,4,12 weeks after surgery respectively to measure the bongding strength of the implant-bone interface by the push-out test. Results After the cancellous bone was squeezed and implants were installed,the shear strength in 2. 0 mm group was significantly higher than in 0 mm group,0. 6 mm group and 1. 2 mm group at week 1 and 2（ P〈0. 05）. The shear strength showed no significant difference between groups at week 4,12（ P〉 0. 05）. Conclusion The biomechanical property of cancellous bone can be significantly improved by the squeezing technique,which is probably beneficial to obtain the primary stability of implants.

关 键 词：骨挤压 松质骨 生物力学 推出实验 牙种植 

分 类 号：R783[医药卫生—口腔医学]