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中华口腔医学研究杂志(电子版)

中华口腔医学研究杂志(电子版) ›› 2016, Vol. 10 ›› Issue (06) : 395 -401. doi: 10.3877/cma.j.issn.1674-1366.2016.06.006

所属专题： 文献；

基础研究

聚甲基丙烯酸甲酯微球改型的人工树脂牙耐磨性能和硬度的研究
刘珂1, 浩志超2,†(), 王茂夏3, 孟玉坤3   
  1. 1. 272000　济南医学院附属医院口腔科
    2. 510055　广州，中山大学光华口腔医学院·附属口腔医院，广东省口腔医学重点实验室
    3. 610041　成都，四川大学口腔国家重点实验室，四川大学华西口腔医院口腔修复科
  • 收稿日期:2016-10-19 出版日期:2016-12-01
  • 通信作者: 浩志超

Wear resistance and hardness of a polymethyl methacrylate pearls modified artificial resin tooth

Ke Liu1, Zhichao Hao2,†(), Maoxia Wang3, Yukun Meng3   

  1. 1. Department of Stomotology, First Affiliated Hospital of Jining Medical University, Jining 272000, China
    2. Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, China
    3. State Key Laboratory of oral diseases, Sichuan University, Department of Prosthodontics, Hospital of West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2016-10-19 Published:2016-12-01
  • Corresponding author: Zhichao Hao
  • About author:
    Corresponding author: Hao Zhichao, Email:
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引用本文：

刘珂, 浩志超, 王茂夏, 孟玉坤. 聚甲基丙烯酸甲酯微球改型的人工树脂牙耐磨性能和硬度的研究[J]. 中华口腔医学研究杂志(电子版), 2016, 10(06): 395-401.

Ke Liu, Zhichao Hao, Maoxia Wang, Yukun Meng. Wear resistance and hardness of a polymethyl methacrylate pearls modified artificial resin tooth[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2016, 10(06): 395-401.

目的

研究比较聚甲基丙烯酸甲酯（PMMA）微球改型的人工树脂牙与另外5种常人工树脂牙的耐磨耗特性和硬度。

方法

本实验选取6种人工牙（3种高交联树脂牙：Vita Lingoform，Premium，Portrait IPN；2种合成树脂牙Yamahachi PX，Kaiplus和传统的PMMA树脂牙Yamahachi FX，n= 8），其中Vita Lingoform为PMMA微球改型的新型树脂牙。另外，选取牙釉质样本为对照组。使用高温微动摩擦试验机进行反复滑动摩擦实验后用三维轮廓扫描仪确定磨痕的深度损失和体积损失，并用微压痕法测定各组样本的维氏硬度，分析统确定各组样本之间磨耗损失和硬度的差异以及人工树脂牙的磨耗损失与维氏硬度值进行相关性分析。

结果

磨痕分析结果显示，6种人工树脂牙以及牙釉质的磨耗损失（深度损失μm，体积损失mm3 × 10-3）差异有统计学意义（H深度损失 = 95.01，H体积损失 = 93.96，P<0.001）。加入PMMA微球的Vita Lingoform组树脂牙的磨耗损失量（1.58，1.377）低于传统的PMMA树脂牙Yamahachi FX（2.22，1.983，P<0.001），但高于复合树脂牙Yamahachi FX和Kaiplus（1.01 ~ 1.06，0.935 ~ 0.990，P<0.05）。同时，Vita Lingoform组树脂牙组（37.2）的硬度低于复合树脂牙组（41.0 ~ 43.1，P<0.05），高于传统的PMMA树脂牙Yamahachi FX（25.9，P<0.001）。高交联组树脂牙Premium和Portrait IPN的磨耗损失量（1.57 ~ 1.64，1.360 ~ 1.409）和硬度（36.1 ~ 37.4）与Vita Lingoform组差异均没有统计学意义（P>0.05）。6种人工树脂牙的耐磨性能和硬度均低于牙釉质对照（0.31，0.213；68.2，P<0.001）。相关性分析的结果显示，硬度与深度损失（r = -0.896）和体积损失（r = -0.893）均成负相关性。

结论

PMMA微球改型的树脂牙耐磨性能和硬度均高于传统的丙烯酸树脂牙，但低于复合树脂人工牙和天然牙釉质，且与其他高交联人工树脂牙差异不大。

关键词: 硬度, 人工树脂牙, 耐磨性能, 磨耗损失
Objective

The purpose of this study was to evaluate the wear resistance and hardness of a polymethyl methacrylate (PMMA) pearls modified artificial resin tooth compared to five commercially available denture teeth.

Methods

Eight specimens of six different artificial resin teeth (3 highly cross-linked acrylic resin teeth: Vita Lingoform, Premium and Portrait IPN; 2 composite resin teeth: Yamahachi PX and Huge Kaiplus and 1 conventional acrylic resin teeth Yamahachi FX) were tested. One of the artificial resin teeth (Vita Lingoform) is a new PMMA pearls modified denture teeth. Human enamel was used as a control group. The specimens were mounted to a high temperature fretting abrasive tester with a pin-on-block design, and the vertical loss and volume loss of the samples were measured using three-dimensional surface profilometer. Hardness of the samples was determined using a micro-Vickers hardness tester. Data of wear loss and Vickers hardness were statistically analyzed with the Kruskal-Wallis H nonparametric test and the Spearman correlation coefficient was used to determine the relationship between the wear loss (vertical loss and volume loss) and hardness.

Results

The six artificial resin teeth and human enamel tested showed significant differences in the vertical loss (μm) and volume loss (mm3×10-3) (Hvertical loss= 95.01, Hvolume loss= 93.96, P<0.001) . Vertical loss and volume loss of the PMMA pearls modified Vita Lingoform group (1.58, 1.377) were higher than those of composite resin teeth (1.01-1.06, 0.935-0.990, P<0.05) , but lower than that of conventional acrylic resin teeth Yamahachi FX (2.22, 1.983, P<0.001) . The Vita Lingoform group (37.2) showed intermediate hardness values, which are significantly lower than those of the composite resin groups (41.0-43.1, P<0.05) . The conventional acrylic resin teeth (25.9) demonstrated the lowest hardness values (P<0.001) . No significant differences for wear loss and Vickers hardness values were found between the Vita Lingoform and the other two highly cross-linked acrylic resin teeth Premium and Portrait IPN (P>0.05) . The human enamel group revealed the highest wear resistance and Vickers hardness values (0.31, 0.213; 68.2, P<0.001) among all the materials tested. Moreover, A negative relationship was found between hardness and vertical loss (r=-0.896) and volume loss (r=-0.893) .

Conclusions

The PMMA modified artificial resin teeth revealed improved wear resistance and hardness values compared to the conventional acrylic resin denture teeth. However, it showed less wear resistance and hardness values than the composite resin teeth and human enamel. No significant differences were found for the wear loss and hardness values among the three highly cross-linked artificial resin teeth.

Key words: Hardness, Artificial resin teeth, Wear resistance, Wear loss
表1 6种人工树脂牙组成成分及生产厂家资料
树脂牙类型/缩写 组成成分 厂家
Vita Lingoform/VL 含PMMA微球的高交联树脂牙 VITA Zahnfabrik,德国
Premium/PR MPM?PMMA Heraeus Kulzer,德国
Portrait IPN/PI IPN Dentsply,美国
Huge Kaiplus/KP 合成树脂牙 沪鸽齿科材料有限公司
Yamahachi PX/YP 合成树脂牙 Yamahachi Dental Mfg,日本
Yamahachi FX/YF PMMA Yamahachi Dental Mfg,日本
图1 磨耗实验仪
表2 磨耗实验后各组人工树脂牙与牙釉质的深度损失和体积损失（±s）
材料类型 深度损失（μm） 体积损失(mm3 × 10-3)
Vita Lingoform 1.58 ± 0.10 1.377 ± 0.015
Premium 1.64 ± 0.06 1.409 ± 0.065
Portrait IPN 1.57 ± 0.10 1.360 ± 0.058
Huge Kaiplus 1.01 ± 0.02 0.935 ± 0.048
Yamahachi PX 1.06 ± 0.05 0.990 ± 0.054
Yamahachi FX 2.22 ± 0.79 1.983 ± 0.177
牙釉质 0.31 ± 0.04 0.213 ± 0.041
图2 各组人工树脂磨耗实验后磨痕的三维重建图（正面观）
图3 各组人工树脂牙和牙釉质硬度测试的结果以及硬度与磨耗损失的相关性
图4 各组人工树脂牙磨痕的表面形貌图（SEM × 5000）
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