不同表面处理全解剖式氧化锆全瓷冠磨耗性能的对比研究

发布时间：2017-12-26 22:25

本文关键词：不同表面处理全解剖式氧化锆全瓷冠磨耗性能的对比研究　出处：《广西医科大学》2017年硕士论文　论文类型：学位论文

【摘要】：目的比较经抛光、上釉及喷砂三种不同表面处理方法处理的全解剖式氧化锆全瓷冠二体磨耗实验后的体量损失、表面磨损情况以及副配的天然牙磨损情况。评价三种不同表面处理方法对全解剖式氧化锆全瓷冠磨耗性能的影响,指导临床选择更好的氧化锆全瓷冠的表面处理方式以降低修复体及对颌天然牙磨损程度。方法1.3Shape扫描仪扫描右下第一磨牙的预备体石膏模型(按《口腔修复学》第六版教材中牙体预备标牙合面预备1.5-2.0mm,颊、舌侧预备1.5mm,邻面预备1.5mm,由广西医科大学附属口腔医院口腔修复科医师预备),使用CAM雕刻机切割制作15个聚甲基丙烯酸甲酯(PMMA)预备体代型。2.3Shape扫描仪扫描前一步中制作的右下第一磨牙PMMA预备体代型,使用CAD\CAM系统制作15个全解剖式氧化锆全瓷冠,平均分为3个实验组,每组5个试件,3个组分别用抛光、上釉、喷砂三种方式处理试件表面,粘接于PMMA预备体代型上。3.选取硬度对比无差异(P0.05,α=0.05)的新鲜拔除的上颌第一前磨牙15颗,取相对无磨耗的非功能颊尖作为对磨物,包埋于自凝树脂内,制作直径为6.2mm,高度为10mm圆柱形底座,并随机分为3组,每组5个试件,抛光20s后与氧化锆全瓷冠试件对应作为副配。4.将配对好的3组试样置于UMT-3微摩擦磨损仪上,在人工唾液环境中进行二体磨耗实验,实验频率为0.2Hz,加载力10N,实验时长为1小时。5.实验前后每个样本进行质量测量,同时使用磨耗仪匹配的软件记录每个样本的动态摩擦系数平均值、观察动态摩擦系数变化,将3个实验组的结果进行对比分析。6.从3个实验组中各选取1个样本使用扫描电子显微镜(SEM)观察磨损表面形态。结果1.三组不同表面处理全解剖式氧化锆全瓷冠磨耗实验后损失质量之间有统计学差异(P0.05),抛光组与上釉组、喷砂组与上釉组结果均有显著统计学差异(P0.01),抛光组与喷砂组结果有统计学差异(P0.05),三组全解剖式氧化锆全瓷冠磨耗量由小到大依次是:喷砂组、抛光组、上釉组。2.三组副配天然牙磨耗实验后损失质量无统计学差异(P0.05),三组副配天然牙磨耗量由小到大依次是:抛光组、喷砂组、上釉组。3.抛光组与上釉组、抛光组与喷砂组摩擦系数间有统计学差异(P0.05),上釉组与喷砂组摩擦系数间无统计学差异(P0.05),抛光组、上釉组、喷砂组摩擦系数由小到大依次是:抛光组、喷砂组、上釉组。4.抛光组摩擦系数保持一个较稳定的变化水平,无增大趋势。上釉组起始阶段摩擦系数变化保持稳定水平,中后期摩擦系数振幅增大,变化剧烈。喷砂组摩擦系数一直保持稳定的振幅,随时间延长摩擦系数呈缓慢增加趋势。5.扫描电镜结果显示抛光组样品表面磨耗区域可见有犁钩状磨痕,局部可见微裂纹,有磨屑剥脱、粘着;未磨耗区域可见因抛光形成的犁钩状浅划痕。上釉组样品表面磨耗区域凹凸不平,磨耗面局部有锐利的边缘,散在大量颗粒状磨屑;未磨耗区域表面光滑,仅有少量杂质附着。喷砂组表面磨耗区域可见犁钩状浅划痕,少量磨屑附着,无明显孔隙;未磨耗区域表面不平整,有许多因喷砂去除细小颗粒后形成的孔隙。结论表面抛光处理比上釉和喷砂处理更利于防止全解剖式氧化锆全瓷冠自身及对颌天然牙的过度磨耗。三种表面处理方式中,抛光是作为全解剖式氧化锆全瓷冠表面处理的最佳方式。
[Abstract]:Objective to compare the body loss, surface wear and the wearing of the natural teeth of the total anatomic zirconia all ceramic crowns treated by three different surface treatments including polishing, glazing and sandblasting. After two wear experiments, Objective to evaluate the effect of three different surface treatments on the wear performance of the total anatomic zirconia all ceramic crowns, and to guide the clinical selection of better surface treatment methods of zirconia all ceramic crowns, so as to reduce the wear degree of the restorations and the natural teeth of the jaws. Preparation method of gypsum model 1.3Shape scanning right first molar (by "prosthodontics" sixth edition of tooth preparation standard occlusal surface preparation 1.5-2.0mm, buccal and lingual preparation 1.5mm, proximal reduction by oral 1.5mm, Affiliated Stomatological Hospital of Guangxi Medical University Department of Prosthodontics, physician preparation) using CAM engraving machine cutting production 15 poly (PMMA) preparation generation type. 2.3Shape scanner in the previous step to make the right first molar tooth type PMMA generation, making all 15 anatomical zirconia crowns using the CAD\CAM system, the 3 experimental group for the average, each of the 5 specimens, 3 groups were treated with the specimen surface polishing, sandblasting, glazed three PMMA, bonded to the tooth generation type. The selection of 3. hardness compared to no difference (P0.05, alpha =0.05) of freshly extracted maxillary first premolars 15 teeth, the relative abrasion of non functional buccal tip as the grinding material, embedded in self curing resin production, diameter 6.2mm, height 10mm of a cylindrical base, and randomly divided into 3 groups, each group 5 specimens, polished 20s and zirconia crowns specimens corresponding with as vice. 4., the 3 pairs of paired samples were placed on the UMT-3 Micro Friction and wear tester, and the two body wear test was conducted in artificial saliva. The experimental frequency was 0.2Hz, the loading force was 10N, and the experimental time was 1 hours. 5. before and after the experiment, the quality of each sample was measured. At the same time, the average value of the dynamic friction coefficient and the dynamic friction coefficient of each sample were recorded by the software matching the attrition instrument. The results of the 3 experimental groups were compared and analyzed. 6. from 3 experimental groups, 1 samples were selected to observe the wear surface morphology by scanning electron microscope (SEM). Results 1. of three groups of different surface treatment between anatomical type zirconia crowns wear mass loss after the experiment there were significant differences (P0.05), glazed polished group and group, group and group of glazed sandblasting results there was a statistically significant difference (P0.01), polished group and sandblasting group results have statistical difference between the three groups (P0.05). The anatomy of zirconia wear crowns from less are: sandblasting and polishing and glazing group group group. 2. the three groups had no significant difference with vice natural tooth wear mass loss after the experiment (P0.05), three deputy group with natural tooth wear in order: polishing group, sandblasting group, glazed group. 3. polished group and glazed polished group and sandblasting group group, there were significant differences between the friction coefficient (P0.05), glazed group and sandblasting group had no significant difference between the friction coefficient (P0.05), polishing group, glazed sandblasting group group, the friction coefficient in order is: polishing group, sandblasting group, glazed group. 4. the friction coefficient of the polishing group keeps a stable level of change, and there is no increasing trend. The change of the friction coefficient at the beginning of the glazing group remains stable, and the amplitude of the friction coefficient increases in the middle and late stages, and the change is intense. The friction coefficient of sand blasting group keeps steady amplitude, and the friction coefficient increases slowly with time. 5. scanning electron microscope results showed that there were plow hook wear marks in the surface wear area of the polishing group, partial micro cracks, debris stripped and adhered, and the scratched shallow scratches formed in the unworn area. The surface wear area of the glazing group is uneven, and the worn surface has sharp edges, scattered on a large number of grainy debris, and the area of the worn area is smooth, with only a small amount of impurities attached. The surface wear area of the sandblasting group is visible with plow hook shallow scratches, a small amount of debris attached, and no obvious pores. The surface of the unworn area is uneven, and there are many pores formed after sand blasting to remove fine particles. Conclusion the surface polishing treatment is more beneficial to prevent the excessive wear of the completely anatomic zirconia porcelain crown and the natural teeth. Of the three surface treatments, polishing is the best way to treat the surface of all anatomic zirconia ceramic crowns.
【学位授予单位】：广西医科大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：R783.3

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