摘要
目的 :研究改良喷砂表面处理对钛牙种植体骨界面剪切强度的影响 ,从界面生物力学角度证实改良喷砂表面处理在钛牙种植体中应用的可行性和应用价值。方法 :将光滑表面钛种植体与改良喷砂表面种植体随机植入狗股骨内侧髁 ,分别于植入后 2、4、12周取材 ,Instron电子拉伸试验机检测种植体骨界面的剪切强度。扫描电镜与 X-射线能谱分析仪观察植入 12周拔出的种植体表面 ,并进行元素分析。结果 :改良喷砂表面组骨界面剪切强度明显高于光滑表面组 ,约高出 4倍 ,且植入 2周即已获得超出光滑表面组 12周所能达到的最大强度。植入 12周后拔出的改良喷砂表面种植体表面经扫描电镜观察与 X-射线谱分析 ,提示种植体表面大部分被覆骨组织 ,粗糙表面的二级窝洞内充满骨样组织。结论 :改良喷砂表面处理所获得的粗糙表面可以大大地提高牙种植体骨界面的结合强度。
Objective:To study the effects of the modified sandblasting surface treatment on the bone implant interfacial shear strength of titanium dental implant.Methods:Titanium implants with smooth surface or modified sandblasted surface were inserted into femoral medialis condyli of dogs at random.The samples of implant with surrounding bone tissue were prepared in blockes and the shear strength of the interface was measured with Instron electronic pull out tester 2,4 and 12 weeks after operation. The modified sandblasted surface of the implant was observed with SEM and X ray spectroscopy 12 weeks after operation.Results:2 and 12 weeks after implantation the shear strength(MPa) between bone tissue and implants with modified sandblasted surface was 4.28±0.88 and 7.54±0.34 respectively,that between bone tissue and implants with smooth surface 0.09±0.08 and 1.43±0.46 respectively.SEM and X ray spectroscopy observation revealed that the most parts of the sandblasted surface of the implants were covered by bone tissue and bone matrix deposited into the pores created by the acid etching.Conclusion:The rough surface of titanium dental implant created by the modified sandblasting surface treatment can enhance the shear strength between bone tissue and implant.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2001年第6期486-488,共3页
Journal of Practical Stomatology
关键词
钛
牙种植体
界面剪力
喷丸
表面处理
Titamin
Endosseous dental implantation
Interface shear stress
shot blasting
