两种表面处理方法对聚醚醚酮弯曲强度的影响

发布时间：2018-05-31 12:56

本文选题：聚醚醚酮 + 表面处理　；参考：《昆明医科大学》2017年硕士论文

【摘要】：聚醚醚酮及其复合物因良好的物理机械性能、美学性能、稳定的化学性能,可靠的生物安全性以及潜在的抗菌性,成为最有潜力替代传统金属、陶瓷材料的新型牙科材料。然而,聚醚醚酮极其稳定的化学性能导致其粘接性能的低下。目前表面喷砂及浓硫酸酸蚀被绝大多数学者认为是提升聚醚醚酮粘接性能的有效方法,但是喷砂或酸蚀后是否会降低材料的强度是影响修复体使用寿命的重要因素。[目的]对PEEK(BioHPP)试件进行表面喷砂或浓硫酸酸蚀处理。通过三点弯曲强度测试评价不同表面处理后PEEK试件的强度。用游标卡尺测量各组试件表面处理前后的长度、宽度及厚度,通过试件长、宽、厚的变化评价表面处理对PEEK试件尺寸的影响。并用扫描电子显微镜观察不同表面处理后PEEK的表面微观形貌,以分析表面处理对试件强度及尺寸影响的机理。[方法]用CAD/CAM技术制作规格为15mm×2mm×1mm的PEEK(BioHPP)试件48个。打磨抛光后在酒精中超声清洗10分钟,无油空气吹干。试件随机分为8组,分别是NT组(未处理),S-120组(0.2MPa120μm喷砂),S-50 组(0.2MPa50μm 喷砂),S-250 组(0.2MPa250μm 喷砂),S-0.7组(0.7MPa120μm 喷砂),AE-60 组(98%浓硫酸酸蚀 60s),AE-120 组(98%浓硫酸酸蚀120s),AE-300(98%浓硫酸酸蚀300s)。在进行表面处理前,测量并记录各组试件的长、宽、厚。处理完成后,从各实验组中随机抽取一个试件进行扫描电镜观察,其余的试件则进行三点弯曲强度测试。在弯曲强度测试前对各组试件进行长、宽、厚的测量并记录。用SPSS软件对实验数据进行统计分析,检验其差异是否具有统计学意义。[结果]通过SEM观察发现,试件经处理后其表面形貌发生了变化,呈现出不同程度的裂隙、凹坑或孔洞。通过三点弯曲测试发现,与未处理组相比,经喷砂或浓硫酸处理后试件强度均有所下降(P0.05)。0.2MPa压力下,50μm、120μm、250μm喷砂处理组间的弯曲强度没有统计学差异(P0.05),120μm粒度喷砂,0.7MPa压力组试件的强度低于0.2MPa压力组(P0.05)。对于浓硫酸酸蚀处理组,酸蚀60s、120s、300s后试件的弯曲强度无统计学差异(P0.05)。通过游标卡尺测得的试件处理前后尺寸发现,经喷砂或酸蚀处理后各组试件的长度与处理前无统计学差异(P0.05),S-0.7组处理后的宽度较处理前有所增加(P0.05),其余各组的宽度与处理前无统计学差异(P0.05),S-250组和S-0.7组的厚度较处理前有所减少(P0.05),而AE-300组的厚度较处理前有所增加(P0.05),其余各组的厚度与处理前无统计学差异(P0.05)。[结论]1.氧化铝颗粒喷砂或98%浓硫酸酸蚀处理均对PEEK试件的弯曲强度有显著影响,处理组的试件弯曲强度与未处理组相比有显著的下降。2.对于喷砂处理的PEEK而言,在其他条件相同的情况下,砂粒粒径大小的变化对PEEK的弯曲强度无显著影响;而在相同粒径的条件下,增大喷砂的压力将会造成PEEK试件弯曲强度的显著下降。3.98%浓硫酸酸蚀会降低PEEK试件的弯曲强度,但酸蚀时间的长短对PEEK的弯曲强度无明显影响。4.一定条件的喷砂或酸蚀处理会造成PEEK试件尺寸的改变。对于喷砂的试件,在较大粒径或较大压力下喷砂会造成试件厚度的减少,而较大的压力还会使宽度增加,压力对尺寸的改变更明显;98%浓硫酸酸蚀时间过长则会增加PEEK试件的厚度。
[Abstract]:Peek and its complexes have become the most potential new dental materials to replace traditional metal and ceramic materials because of their good physical and mechanical properties, aesthetic properties, stable chemical properties, reliable biological safety and potential antibacterial properties. However, the extremely stable chemical properties of PEEK lead to low adhesive properties. Surface sandblasting and sulfuric acid etching are considered as an effective method to improve the bonding properties of PEEK, but whether the strength of materials is reduced after sand blasting or etching is an important factor affecting the service life of the restorations. [Objective] to make surface sand or concentrated sulfuric acid etching treatment for PEEK (BioHPP) specimens. Through three point bending strength The strength of PEEK specimen after different surface treatment was tested and evaluated. The length, width and thickness of the specimens before and after surface treatment were measured with vernier caliper. The effect of surface treatment on the size of PEEK specimen was evaluated by the change of length, width and thickness of the specimen. The surface micromorphology of PEEK after different surface treatment was observed by scanning electron microscope. The mechanism of the influence of surface treatment on the strength and size of the specimen. [method] 48 PEEK (BioHPP) specimens of 15mm x 2mm x 1mm were made with CAD/CAM technology. After polishing and polishing, the samples were cleaned by ultrasonic for 10 minutes and no oil air was blown dry. The specimens were randomly divided into 8 groups, namely, NT group (not in place), S-120 group (0.2MPa120 micron m sandblasting), S-50 group (0.2MPa50 mu) Sand spraying), group S-250 (0.2MPa250 mu m sandblasting), group S-0.7 (0.7MPa120 mu m sandblasting), AE-60 group (98% concentrated sulfuric acid etching 60s), AE-120 group (98% concentrated sulfuric acid etching 120s), AE-300 (98% concentrated sulfuric acid etching 300s). Before the surface treatment, the length, width and thickness of each group were measured and recorded. After the treatment was completed, one sample was randomly selected from the experimental groups. Scanning electron microscope observation, the rest of the specimens were tested for three points bending strength. Before the bending strength test, the length, width and thickness of the specimens were measured and recorded. The statistical analysis of the experimental data was carried out by SPSS software to test whether the difference was statistically significant. [results] the surface morphology of the specimen after the treatment was observed through the SEM observation. There were different degrees of cracks, pits or holes. Through three point bending test, it was found that compared with the untreated group, the strength of the specimen after sand blasting or concentrated sulfuric acid treatment decreased (P0.05).0.2MPa pressure, 50 m, 120 mu m, and 250 mu m treatment group had no statistical difference (P0.05), 120 micron m granularity spraying, 0. The strength of the 7MPa pressure group was lower than that of the 0.2MPa pressure group (P0.05). For the concentrated acid etching treatment group, the bending strength of the specimens after the etching of 60s, 120s and 300s was not statistically different (P0.05). There was no statistical difference between the length of the specimens after the treatment of the test pieces obtained by the vernier caliper (P0.05) and before the treatment (P0.05) (P0.05). The width of the S-0.7 group was increased (P0.05). The width of the other groups was not statistically different from that before treatment (P0.05), the thickness of the S-250 and S-0.7 groups decreased (P0.05), while the thickness of the AE-300 group increased (P0.05), and the thickness of the other groups was not statistically different from that before treatment (P0.05). [Conclusion] 1. alumina particle sandblasting or 98% concentrated sulfuric acid etching treatment have significant influence on the bending strength of PEEK specimens. The bending strength of the treated group is significantly lower than that of the untreated group. For the PEEK of the sand blasting treatment, the change of the particle size of the sand particles has no significant effect on the bending strength of PEEK under the same conditions. Under the same particle size conditions, increasing the pressure of sand blasting will cause a significant decrease in the bending strength of the PEEK specimen and.3.98% concentrated sulfuric acid etching will reduce the bending strength of the PEEK specimen, but the length of the etching time has no obvious effect on the bending strength of the PEEK. The size of PEEK specimen will be changed by the sand blasting or etching treatment of.4. conditions. Sand spraying will reduce the thickness of the specimen under the larger particle size or larger pressure, and the larger pressure will increase the width and the change of the pressure to the size, and the thickness of the PEEK specimen will be increased by the long etching time of the 98% concentrated sulfuric acid.
【学位授予单位】：昆明医科大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：R783.1

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