口腔医学研究

口腔医学研究 ›› 2017, Vol. 33 ›› Issue (8): 885-888.DOI: 10.13701/j.cnki.kqyxyj.2017.08.021

• 临床研究论著 • 上一篇    下一篇

纯钛烤瓷冠与镍铬烤瓷冠抗折力的对比研究

连颂峰1*, 林敬凯1, 蔡坤灿2, 张晏祥1   

  1. 1. 厦门长庚医院口腔科 福建 厦门 361028;
    2. 厦门市仿真美义齿科技有限公司 福建 厦门 361000
  • 收稿日期:2017-02-08 出版日期:2017-08-20 发布日期:2017-08-28
  • 通讯作者: 连颂峰,电话:0592-6202502
  • 作者简介:连颂峰(1981~ ),男,福建永泰人,硕士,主治医师,主要从事口腔临床修复及其相关材料的研究。
  • 基金资助:
    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)

Comparison of Fracture Loads between Cast and Milled Titanium Ceramic Crowns and Base Metal Ceramic Crowns.

LIAN Song-feng1*, LIN Jing-kai1, CAI Kun-can2, ZHANG Yan-xiang1.   

  1. 1. Department of Stomatology, Xiamen Changung Hospital, Xiamen 361028, China;
    2. Xiamen Fangzhengmei Prosthesis Co. Ltd., Xiamen 361000, China.
  • Received:2017-02-08 Online:2017-08-20 Published:2017-08-28

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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。

关键词: 纯钛, 镍铬, 金属烤瓷冠, 抗折力

Abstract: Objective: To compare the fracture loads of metal ceramic crowns (MCCs) composed of cast and milled titanium and MCCs composed of base metal. Methods: Thirty premolar MCCs were fabricated with 3 different metal copings: cast nickel-chromium alloy (Ni group), milled titanium (T1 group) and cast titanium (T2 group). Various geometric dimensions of the MCCs were tested with a laboratory scanner and digital measurement software and then adjusted. All final data were collected and statistically analyzed for confirming the homogeneity among groups. After cemented to identically milled titanium dies, all specimens were subjected to an occlusal loading axially in an universal testing machine until ceramic fracture occurred to measure the fracture load (F). The fractures were characterized using stereomicroscope. The F values were analyzed using one-way ANOVA test. Results: The mean fracture loads were (2348 ± 441)N for Ni group, (2144 ± 501)N for T1 group, and (1823 ± 576)N for T2 group, respectively. No significant differences were observed. Most of the fractures were confined to the palatal third. The chief failure mode for Ni and T1 groups was mixed failure, but it was adhesive failure for T2 group. Conclusion: The fracture resistance of titanium-based MCCs is similar to that of Ni-Cr alloy containing MCCs, and therefore titanium-based MCCs may be a potential alternative to conventional MCCs.

Key words: Titanium , Ni-Cr, Metal ceramic crown , Fracture load

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