中国实用口腔科杂志 ›› 2022, Vol. 15 ›› Issue (6): 705-710.DOI: 10.19538/j.kq.2022.06.013

• 论著 • 上一篇    下一篇

不同表面处理方法对树脂-陶瓷复合材料微观形貌和粘接强度影响研究

张    皓1,王秀文1,李斯文2,马红梅3   

  1. 1. 东北大学医院口腔科,辽宁  沈阳  110004;2. 中国医科大学附属口腔医院综合科,辽宁  沈阳  110002;3. 南方医科大学深圳口腔医院(坪山)修复科,广东  深圳  518118
  • 出版日期:2022-11-30 发布日期:2023-01-16

  • Online:2022-11-30 Published:2023-01-16

摘要: 目的    研究不同表面处理方法对树脂-陶瓷复合材料表面微观形貌及粘接强度的影响。方法   选择树脂-陶瓷复合材料Vita Enamic(以下简称“VE”)和Lava Ultimate(以下简称“LU”),分别切割成2种不同尺寸瓷块。每种尺寸瓷块均随机分为8组,每组6 mm × 6 mm × 5 mm瓷块5个、16.0 mm × 4.0 mm × 1.5 mm瓷块4个。其中,对照组不做任何表面处理;其余7组为处理组,分别记为氢氟酸组(氢氟酸凝胶酸蚀),25、50、110 μm玻璃珠组(不同颗粒尺寸玻璃珠喷砂),以及25、50、110 μm氧化铝组(不同颗粒尺寸氧化铝喷砂)。使用共聚焦显微镜观察并测量表面粗糙度Ra值,扫描电镜观察表面微观形貌,并进行粘接强度测试。结果    共聚焦显微镜观察显示,相较于对照组,各处理组均表现为较尖锐的片瓦状凹凸表面,其中110 μm氧化铝组2种材料瓷块表面均具有明显的凹坑和沟槽。测量各组表面粗糙度Ra值也发现,110 μm氧化铝组2种材料瓷块表面粗糙度Ra值均较其他组显著增高(均P < 0.05);其次为50 μm氧化铝组和110 μm玻璃珠组,而这两组相同材料瓷块表面粗糙度Ra值比较,差异无统计学意义(均P > 0.05)。扫描电镜观察显示,各喷砂处理组瓷块表面出现明显的裂隙与凹陷,相对于各氧化铝喷砂处理组,玻璃珠喷砂处理组瓷块表面更平整,其中110 μm氧化铝组瓷块表面裂纹最为明显。各组VE瓷块粘接强度比较显示,氢氟酸组、110 μm玻璃珠组、50 μm氧化铝组和110 μm氧化铝组较其他组的粘接强度高;各组LU瓷块粘接强度比较显示,110 μm玻璃珠组、50 μm氧化铝组和110 μm氧化铝组较其他组的粘接强度高,差异均有统计学意义(均P < 0.05)。结论    氧化铝和玻璃珠喷砂处理均能显著改变VE和LU陶瓷表面形貌,其中110 μm玻璃珠和50 μm氧化铝喷砂处理可在显著提高陶瓷粘接强度同时避免微裂纹的产生。

关键词: 树脂-陶瓷复合材料, 表面处理, 氧化铝, 玻璃珠, 粘接强度

Abstract: Objective    To evaluate the effect of different surface treatments on surface microstructure and bond strength of resin-ceramic hybrid material. Methods    Resin-ceramic hybrid materials Vita Enamic(VE)and Lava Ultimate(LU)were selected and sectioned into specimens of two sizes. Each size of specimens were randomly divided into eight groups,with five specimens of 6 mm × 6 mm × 5 mm and 4 specimens of 16.0 mm × 4.0 mm × 1.5 mm in each group. The control group did not receive any surface treatment and there are seven treatment groups:HF group(hydrofluoric acid etching);25 μm,50 μm,110 μm glass beads group(sandblasted with different sizes of glass beads);25 μm,50 μm,110 μm Al2O3 group(sandblasted with different sizes of Al2O3). Confocal microscope (LSCM) was used to determine surface roughness value (Ra),scanning electron microscope(SEM) was used to observe surface microstructure,and the bonding strength was tested. Results    The LSCM analysis showed that compared with the control group,the treatment groups showed sharp shingle-like concave-convex surface and 110 μm Al2O3 group showed obvious pits and grooves on the surface. The surface treatment with 110 μm Al2O3 of two ceramics showed higher surface roughness value compared with other surface treatments(P < 0.05),followed by the 50 μm Al2O3 group and the 110 μm glass bead group,but there was no significant difference in the Ra of the same ceramic between the two groups(P > 0.05). The SEM analysis showed that the surfaces of sandblasted groups showed micro-sized elevated and depressed areas with crevices and pits. Compared with the Al2O3 group,the surfaces of  glass bead groups were smoother and the crack of 110 μm Al2O3 groups were the most obviously. For the VE system,the HF,110 μm glass beads,50 μm Al2O3 and 110 μm Al2O3 groups showed significantly higher micro-shear bond strength(μSBS)compared with other groups(P < 0.05). For the LU system,110 μm glass beads,50 μm Al2O3 and 110 μm Al2O3 groups showed significantly higher micro-shear bond strength(μSBS)compared with other groups(P < 0.05). Conclusion    The surface morphology of resin-ceramic hybrid material could be influenced by alumina and glass beads sandblasting significantly. The 110 μm glass beads and 50 μm AL2O3 sandblasting can improve the bonding strength of ceramics and avoid the occurrence of microcracks.

Key words: resin-ceramic hybrid material, surface treatment, Al2O3, glass beads, bond strength