等离子喷涂纳米氧化锆—钛基台材料的机械相容性研究

发布时间：2018-04-01 05:22

本文选题：等离子喷涂　切入点：纳米氧化锆　出处：《山东大学》2015年硕士论文

【摘要】：背景：基台是连接种植体和上部修复体的重要结构,目前临床上应用的纯钛基台有着良好的生物相容性和与种植体的摩擦配副,但纯钛基台在种植体肩部位置较高或牙龈较薄的前牙区的患者中,基台金属颜色暴露严重影响病人的美观,降低病人的满意度。氧化锆基台,其优秀的生物相容性和美学性能更能满足患者和修复医生的要求,然而瓷基台的强度较低、脆性较高且易于折裂崩断。因此,针对纯钛基台和氧化锆基台在美观性和机械性能方面的缺陷,实验设计在纯钛基台的穿龈部分增加氧化锆涂层,保留纯钛基台与钛种植体及中央螺丝的各个界面的联结,避免了不同材料形成的摩擦配副的配合差异,同时基台穿龈部分采用氧化锆瓷层解决了美观问题。这种兼容氧化锆基台的美观和生物相容性及纯钛基台的机械相容性的新型基台实现能够恢复最大的功能和最佳的美观的种植义齿,具有广阔的市场前景和较高的临床应用价值。目的：制备等离子喷涂纳米氧化锆-钛基台,其上部制备氧化锆全瓷冠,通过断裂力值检测、咀嚼模拟试验及热负荷加载试验评价等离子喷涂纳米氧化锆-钛基台的机械相容性,为该材料实现其临床应用价值,在机械性能方面提供客观的理论依据。方法：制备一段式纯钛种植体,根据颈部直径分为四组,四组直径分别为A组2.6mm、B组2.Omm、C组1.8mm、D组1.6mm,其中A组为标准对照组。B、C、D三组种植体颈部制备等离子喷涂纳米氧化锆涂层,使三组颈部直径均达到标准对照组的2.6mm。按标准工艺程序完成上部氧化锆全瓷冠的树脂粘接修复。对制备好的试件进行断裂力值检测及人工老化试验。1.人工老化试验将A、B、C、D每组6个种植体-基台-冠联接试件固定于冷热循环机械载荷(thermocycling and mechanical loading, TCML)咀嚼模拟疲劳实验机上进行咀嚼模拟试验和热负荷加载试验。观察试件是否出现折裂、破损、裂纹。然后拆除试件上部全瓷冠修复体进行断裂力值检测。2.断裂力值检测将所有一段式纯钛种植体试件进行断裂力值检测。将1mm厚的双层锡箔纸放置于每个试件与加载头之间。利用万能试验机对基台施以1.5 mm/min、与种植体长轴成45°的负荷,直至试件断裂,记录断裂时相应数据及试件断裂部位。其中,本实验设计的人工老化试验包括咀嚼模拟试验和热负荷加载试验。结果：人工老化试验后所有试件均未出现折裂、破损或裂纹。断裂力值检测中基台折裂部位均发生在颈部,人工老化和未人工老化的试件断裂力值统计分析结果见表1,B、C、D三组断裂力值均大于日常咀嚼所需力值,但明显小于A组,各组试件之间均有统计学差异,见表2。但四组试件人工老化前后比较无统计学差异,见表3、图1。结论：以上实验显示本实验小组制备的等离子喷涂纳米氧化锆-钛试件的机械相容性满足临床应用的需要,为此材料的临床应用提供了理论依据。
[Abstract]:Background: the abutment is an important structure connecting the implant and the upper prosthesis. At present, the pure titanium abutment used in clinic has good biocompatibility and friction pair with the implant.But in the patients with pure titanium abutment in the upper shoulder of implant or in the anterior teeth with thinner gingival, the metal color exposure of the abutment seriously affected the beauty of the patients and reduced the satisfaction of the patients.The excellent biocompatibility and aesthetic properties of zirconia base platform can meet the needs of patients and repair doctors. However, the porcelain base table has lower strength, higher brittleness and easy to break and break.Therefore, aiming at the defects of the pure titanium base and zirconia base in beauty and mechanical properties, the experiment designed to add zirconia coating to the gingival part of the pure titanium base, so as to retain the connection between the pure titanium base and the titanium implant and the interface of the central screw.The matching difference of friction pair formed by different materials was avoided, and zirconia ceramic layer was used to solve the aesthetic problem in the gingival part of the base platform.This new type of abutment which is compatible with the aesthetics and biocompatibility of zirconia and the mechanical compatibility of pure titanium abutment can restore the maximum function and the best aesthetic implant denture. It has broad market prospect and high clinical application value.Objective: to prepare plasma sprayed nano-zirconia titanium base platform, and to prepare zirconia all-ceramic crown in the upper part of the platform.The mechanical compatibility of plasma sprayed nano-zirconia titanium substrate was evaluated by mastication simulation test and thermal load loading test, which provided an objective theoretical basis for the material to realize its clinical application value and to provide an objective theoretical basis for its mechanical properties.Methods: One-segment pure titanium implant was prepared and divided into four groups according to the neck diameter. The diameter of each group was 2.6 mm in group A and 1.8 mm in group B and 1.6 mm in group D, respectively. The plasma sprayed nano-zirconia coating was prepared in group A as standard control group.The neck diameter of the three groups was up to 2.6 mm. of the standard control group.The resin bonding restoration of the upper zirconia all-ceramic crown was completed according to the standard process.The fracture force value of the prepared specimen and the artificial aging test. 1.The artificial aging tests were carried out on a mechanical load cycle thermocycling and mechanical loading (TCML) machine for mastication simulation and thermal load loading.Observe whether the specimen is cracked, damaged and cracked.The fracture force value of all ceramic crown prosthesis in the upper part of the specimen was measured. 2. 2.The fracture force of all titanium implant specimens was tested.Place 1mm thick double foil paper between each specimen and the loading head.The universal testing machine was used to apply 1.5 mm / min to the abutment, and the load was 45 掳with the long axis of the implant, until the specimen was broken, and the corresponding data and the fracture site of the specimen were recorded.Among them, the artificial aging test designed in this experiment includes mastication simulation test and thermal load test.Results: no fracture, breakage or crack was found in all specimens after artificial aging test.The fracture force values of the base platform were all located in the neck. The results of statistical analysis of the fracture force values of the artificial and unaged specimens were shown in Table 1, the fracture force values of the three groups were higher than those of the daily masticatory force, but significantly smaller than those of the A group, and the results of statistical analysis showed that the fracture force values of the three groups were higher than those of the daily masticatory forces.There is a statistical difference among the groups, as shown in Table 2.However, there is no statistical difference between the four groups before and after artificial aging, see Table 3, figure 1.Conclusion: the experimental results show that the mechanical compatibility of plasma sprayed nano-zirconia-titanium specimen can meet the needs of clinical application, which provides a theoretical basis for the clinical application of the material.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：R783.6

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