纯钛烤瓷冠与镍铬烤瓷冠抗折力的对比研究

发布时间：2018-03-20 06:46

本文选题：纯钛　切入点：镍铬　出处：《口腔医学研究》2017年08期 　论文类型：期刊论文

【摘要】：目的:对比研究两种方式(铸造及CAD/CAM)制作的纯钛烤瓷冠及镍铬烤瓷冠的抗折力。方法:制作3组前磨牙形态金属烤瓷冠每组各10个:镍铬合金烤瓷冠(Ni组)、CAD/CAM纯钛烤瓷冠(T1组)、铸造纯钛烤瓷冠(T2组)。制作过程中对金属底层冠的厚度进行测量、校正,对烤瓷冠进行扫描、图像测量及校正,所获得的数据进行统计分析排除组间差异。所有烤瓷冠粘结于统一切削制作的纯钛代型上,然后在万能材料测试机上接受静态加载至崩瓷,获得崩瓷时的载荷力值(F),采用单因素方差分析法对比3组F值的差异。折裂面置于体式显微镜下观察折裂范围及破坏形式。结果:3组试件的F值分别为:Ni组(2348±441)N、T1组(2144±501)N、T2组(1823±576)N,差异无统计学意义。折裂主要发生在冠的舌1/3;Ni组、T1组的主要破坏形式为混合破坏,而T2组主要为界面破坏。结论:两种方式制作的纯钛烤瓷冠的抗折力与传统镍铬合金烤瓷冠的相近,且都超过正常咬合力值。
[Abstract]:Objective: to compare and study the flexural strength of pure titanium and Ni-Cr ceramic crowns made by casting and CAD / CAM. Methods: three groups of premolars were made with metal fused porcelain crowns (10 in each group): Ni-Cr alloy ceramic crowns in Ni group and pure titanium / CAM in Ni group. The thickness of the metal bottom crown was measured during the manufacturing process. Calibration, scanning, image measurement and correction of the porcelain crown, statistical analysis of the obtained data and elimination of differences between groups. All porcelain crowns are bonded to the pure titanium substitute made by uniform cutting, And then accept the static loading to the broken porcelain on the universal material testing machine, The load force value of porcelain caving was obtained, and the difference of F value in three groups was compared by single factor variance analysis. The fracture surface was placed under the posture microscope to observe the fracture range and the failure mode. Results the F value of the specimens in the three groups was 2348 卤441 ~ 441 ~ (-1) N ~ (-1), respectively. There was no significant difference between T _ 2 group and T _ 2 group (1823 卤576N, P < 0.01). The fracture occurred mainly in the 1 / 3 Ni group in the crown of the tongue, and the main failure form was mixed destruction. Conclusion: the flexural strength of the pure titanium ceramic crown made by the two methods is similar to that of the traditional Ni-Cr alloy ceramic crown, and both of them exceed the normal bite force value.
【作者单位】：厦门长庚医院口腔科;厦门市仿真美义齿科技有限公司;
【基金】：厦门市科技惠民计划(编号:3502Z20159008) 厦门市海沧区卫生科研项目(编号:350205Z20154012)
【分类号】：R783.1

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