摘要
采用动物兔活体植入与剪切强度试验考察了羟基磷灰石(HA)/Ti生物功能梯度材料(FGM)种植体与头骨基体的结合强度。结果表明,HA-TiFGM种植体/骨结合强度随植入时间延长迅速增高,其强度值与纯HA植入体相当而大大优于纯Ti种植体;植入3个月时,HA-TiFGM与周围骨组织的结合强度可达6.49MPa。剪切断口形貌表明,FGM种植体断裂发生在界面的新骨一侧,说明其界面结合强度甚至超过了新生骨组织本身的剪切强度。
The bonding strength of hydroxyapatite (HA)/Ti FGM implants fabricated by powder metallurgy was investigated by means of the in vivo implanting in rabbits and the shear strength testing. it was shown that the HA/Ti FGM possess a good biocompatibility and osteoconductivity, and can he integrated with bone. After implanted for three months, the FGM implants and the new bone formed around became one bony body. The bonding strength between FGM implants and, the surrounding bone tissues raises quickly with increasing the implanting time, and can reach 6.49MPa after implanted for three months, higher than that of dense pure. HA or Ti implants. Fractography observations reveal that the fracture occurred-in the new bone near the interface during the shear testing of HA/Ti FGM implants, which indicates that its interfacial bonding strength even exceeds the shear strength of new bone tissues.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2003年第6期432-435,共4页
Rare Metal Materials and Engineering
基金
黑龙江省博士后科研启动金项目资助(2000-45000006)
关键词
生物功能梯度材料
剪切强度
羟基磷灰石
钛
functionally gradient biomaterial
shear strength
hydroxyapatite
titanium
