三点弯曲法探究深冷处理对钛瓷结合力的影响

摘要

Objective To investigate the effect of cryogenic processing technique on casting pure titanium metal-porcelain bonding strength and enable doctors to seek for new technologies improving the bond strength be-tween pure titanium and porcelain ,which can provide the theoretical basis for increasing service life of pure titani-um based PFM crown .Methods The test samples were prepared based on ISO9693 :1999 .After production ,all of pure titanium casting specimens were randomly divided into three groups :the control group (A ) ,cryogenic treatment before porcelain-sintering group (B) and cryogenic treatment after porcelain-sintering group (C) .And then all specimens were processed by cryogenic treatment and porcelain-sintering respectively .The electronic uni-versal testing machine was used to measure the three-point bending test for most specimens ,and statistically anal-ysis were conducted .Results Three-point bending test results :mean bond strength values and standard devia-tions of each group are as follow :group A (30 ± 5)MPa ,group B (31 ± 5)MPa ,group C (36 ± 4)MPa .There were statistically significant differences between groups ( P<0 .05) ,S-N-K multiple comparison test showed after porcelain strength of cryogenic treatment group is higher than those of the other two groups ,the difference was statistically significant ( P<0 .05) ,However ,there was no significant difference in the bonding strength between the cryogenic treatment group and the control group ( P>0 .05) .Conclusion The conclusion is that the cryogen-ic treatment technology is beneficial to the improvement of the bonding strength of pure titanium porcelain and ti-tanium po rcelain .%目的 研究深冷处理技术对铸造纯钛烤瓷金瓷结合力的影响,探讨改善钛瓷结合强度的新技术,以期延长纯钛烤瓷的临床使用寿命,并提供理论和试验依据.方法 试件尺寸依据ISO9693:1999标准制备.先制备纯钛铸造试件,之后随机分为对照组(A组)、烤瓷前深冷处理组(B组)和烤瓷后深冷处理组(C组)3个组,分别按顺序完成深冷处理及瓷层的堆塑烧结后,在电子万能试验机上对纯钛烤瓷试件依次进行3点弯曲测试,对测得的数据运用统计学软件进行分析.结果 3点弯曲测试结果:各组试件的钛瓷结合强度分别为:A组(30±5)M Pa,B组(31±5)M Pa,C组(36±4)M Pa,各组间的差异有统计学意义(P<0.05).C组的结合力高于其他2组,差异有统计学意义(P<0.05),而B组与A组的结合力强度差异无统计学意义(P>0.05).结论 深冷处理技术有利于纯钛烤瓷钛瓷结合强度的提高.