3种桩核成形方法对全瓷桩核中桩-核间固位力的影响  

Retention of Selected Cores to All-ceramic Posts in Post-and-core System

作　　者：吕杰[1] 万乾炳[2] 廖运茂[3] 

机构地区：[1]惠州市口腔医院修复科,广东惠州516001 [2]四川大学华西口腔医院修复科 [3]口腔生物医学工程教育部重点实验室四川大学,四川成都610041

出　　处：《华西口腔医学杂志》2007年第1期15-18,共4页West China Journal of Stomatology

基　　金：国家教委回国人员科研启动基金资助项目[教外司留(2002)247]

摘　　要：目的比较在氧化铝-氧化锆纳米复合渗透陶瓷桩上直接烧结形成纳米复合渗透陶瓷核、粘接瓷核及堆塑复合树脂核3种桩核桩-核间的固位力。方法采用自行研制的氧化铝-氧化锆纳米复合渗透陶瓷,制备全瓷桩试件15件,随机分为3组,每组5件。A组为在瓷桩上直接烧结形成瓷核;B组为在瓷桩上粘接瓷核;C组为在瓷桩上直接堆塑光固化复合树脂核。在INSTRON 4302电子力学万能试验机上沿瓷桩长轴方向加载,测试桩-核间固位力。结果3组间固位力的差异有统计学意义(P<0.01),A组固位力为(817.10±42.20)N,分别是B组及C组的3.04倍和2.88倍,差异均有显著性(P<0.01),而B组及C组间的差异无统计学意义(P>0.05)。结论在氧化铝-氧化锆纳米复合渗透陶瓷桩上直接烧结形成纳米复合渗透陶瓷核的结合方式能产生牢固的固位力,直接烧结结合法桩-核间固位力明显高于粘接法和树脂成型核法。Objective To compare the retention of selected cores to all-ceramic posts in post-and-core system, in which the ceramic core was combined with the post by direct sintering, adhering, and the composite resin core was formed onto the post. Methods A total of 15 all-ceramic post fabricated by alumina-zirconia nano-composite infiltrated ceramics were divided into three groups. In group A, forming and combining the ceramic core with the post by direct sintering. In group B, combining the ceramic core with the post by adhering. In group C, forming composite resin core onto the post. Each specimen was placed into a special jig along the post axis and subjected to a load on INSTRON 4302 universal testing instrument until failure. Results There was a statistically significant difference between the groups（P〈0.01）. Group A showed a significantly higher retention which was 3.04 and 2.88 times as high as group B and C respectively（P〈0.01）. There was no significant difference between adhering and composite resin core（P〉 0.05）. Conclusion A reliable retention of the core to the post can be achieved when the alumina-zirconia nanocomposite infiltrated ceramic core is formed and combined with the post by direct sintering, which offers significantly higher retention than adhering and forming composite resin core onto the post.

关 键 词：牙科修复体 全瓷 桩核技术 固位力 

分 类 号：R783.3[医药卫生—口腔医学]