CAD/CAM纯钛烤瓷冠的抗疲劳性与抗折性分析

doi:10.19439/j.sjos.2019.02.002

上海口腔医学 ›› 2019, Vol. 28 ›› Issue (2): 118-122.doi: 10.19439/j.sjos.2019.02.002

CAD/CAM纯钛烤瓷冠的抗疲劳性与抗折性分析

连颂峰¹, 林敬凯¹, 蔡坤灿², 张晏祥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:2018-07-02 修回日期:2018-09-08 出版日期:2019-04-25 发布日期:2019-06-20
通讯作者: 连颂峰,Tel:0592-6202502,E-mail:losmeteor@163.com
作者简介:连颂峰（1981-）,男,硕士研究生,主治医师
基金资助:
厦门市科技惠民计划（3502Z20159008）; 厦门市海沧区卫生科研项目（350205Z20154012）

Study on fatigue and fracture resistance of metal ceramic crowns with CAD/CAM-fabricated titanium copings

LIAN Song-feng¹, LIN Ching-kai¹, TSAI Kung-tsan², CHANG Yen-hsiang¹

1. Department of Stomatology, Xiamen Changung Hospital. Xiamen 361028;
2. Xiamen Fangzhenmei Denture Technology Co. Ltd. Xiamen 361000, Fujian Province, China

Received:2018-07-02 Revised:2018-09-08 Online:2019-04-25 Published:2019-06-20

摘要/Abstract

摘要： 目的比较CAD/CAM纯钛烤瓷冠及镍铬烤瓷冠的抗疲劳性与抗折性。方法制作前磨牙形态镍铬合金烤瓷冠（Ni组）、CAD/CAM纯钛烤瓷冠（Ti组）各12个。为缩小2组试件之间的尺寸差异,制作过程中对试件进行扫描、图像测量及反馈调整。将所有烤瓷冠粘结于统一切削制作的纯钛代型上,经过5000次冷热循环（5~55℃）和75000次50 N的往复加载后,再接受静态加载至崩瓷,获得崩瓷时的载荷力值（F）。折裂面置于体式显微镜下,观察折裂范围及破坏形式。采用SPSS13.0软件包对数据进行统计学分析。结果 2组试件崩瓷时的载荷力值分别为Ni组(1645±356)N、Ti组(1555±331)N,差异无统计学意义(P=0.525)。折裂主要发生在冠的舌1/3。Ti组有3个试件为界面破坏,其余为混合破坏;而Ni组均为混合破坏。结论 CAD/CAM纯钛烤瓷冠具有与镍铬合金烤瓷冠相近的抗疲劳性及抗折性。

关键词: 纯钛, CAD/CAM, 金属烤瓷, 抗折力, 循环加载, 冷热循环

Abstract: PURPOSE: To compare the fatigue and fracture resistance of metal ceramic crowns (MCCs) with nickel-chromium and CAD/CAM-fabricated titanium copings. METHODS: Twelve premolar MCCs were fabricated with cast nickel-chromium alloy (Ni group) and CAD/CAM-fabricated titanium (Ti group) copings, respectively. To minimize the differences among specimens, the geometric dimensions of the MCCs were tested with a laboratory scanner and digital measurement software and then adjusted. After cemented to identically milled titanium dies, each specimen was subjected to thermocycling (5-55℃, 5000 cycles) and cyclic loading (75000 cycles) test, followed by a static load-to-fracture test to measure the fracture loads(F). The fractures were characterized using stereomicroscope. SPSS13.0 software package was used for statistical analysis. RESULTS: The mean fracture loads were (1645±356)N for Ni group and (1555±331)N for Ti group. No significant difference was observed (P=0.525). Most of the fractures were confined to the palatal third. The chief failure mode for all specimens from Ni group and most of the specimens from Ti groups was mixed failure. Adhesive failure was noted in 3 specimens from Ti group. CONCLUSIONS: The fracture resistance of MCCs with CAD/CAM-fabricated titanium copings is similar to that of MCCs with nickel-chromium copings.

Key words: Pure titanium, CAD/CAM, Metal ceramic, Fracture resistance, Cyclic loading, Thermal cycling

中图分类号:

R783.1

连颂峰, 林敬凯, 蔡坤灿, 张晏祥. CAD/CAM纯钛烤瓷冠的抗疲劳性与抗折性分析[J]. 上海口腔医学, 2019, 28(2): 118-122.

LIAN Song-feng, LIN Ching-kai, TSAI Kung-tsan, CHANG Yen-hsiang. Study on fatigue and fracture resistance of metal ceramic crowns with CAD/CAM-fabricated titanium copings[J]. Shanghai Journal of Stomatology, 2019, 28(2): 118-122.

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CAD/CAM纯钛烤瓷冠的抗疲劳性与抗折性分析

Study on fatigue and fracture resistance of metal ceramic crowns with CAD/CAM-fabricated titanium copings

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