氧化锆基台与种植体装配后的配合状态及其抗折强度的实验研究

发布时间：2018-07-16 23:55

【摘要】：目的：研制氧化锆基台并检测其与种植体的配合状态以及探讨其抗折强度为临床应用提供依据。方法：选用纳米氧化锆粉,采用注射成型工艺制作与Dentium Superline系统种植体相匹配的氧化锆牙种植基台；使用光学影像仪对氧化锆基台进行达标检测,依照公差要求剔除不合格基台；随机选取氧化锆基台40枚和Dentium Superline系统种植体40枚,将氧化锆基台与Dentium Superline系统种植体装配并用中央固位螺丝固定,加力前后各拍摄牙片一张,用Digora for windows2.6软件进行测量检测二者配合状态,所加扭力矩为30N·cm；再将组件随机分为A、B两组(每组20个),两组组件分别以两种不同方式固定于不锈钢夹具中并置于万能试验机,A组组件模拟口腔内种植体龈水平植入方式固定(种植体上端平面与夹具平面之间的距离为3mm),B组组件模拟口腔内种植体骨水平植入方式固定(种植体上端平面与夹具平面之间的距离为0mm)；万能试验机的压头与种植体-氧化锆基台组件长轴成90°角、压头位于距种植体上端平面3mm处的基台上,以0.5mm/min的加载速度对基台施加压力,直至基台损坏,记录基台破损时万能试验机所显示的压力数据；应用SPSS17.0统计学软件对两组数据进行t检验。结果： 1.氧化锆基台与种植体的配合状态： X线衍射结果显示氧化锆基台与种植体装配并用中央固位螺丝固定加力后基台向种植体内平均移动了0.18±0.02mm,其锥度连接处的微间隙得到关闭,达到过渡配合状态。 2.氧化锆基台的抗折强度： A组氧化锆基台的平均抗折强度为282.93±17.28N,B组氧化锆基台的平均抗折强度为420.72±13.64N；B组平均抗折强度明显高于A组,二者差异具有统计学意义(P0.05)。结论： 1.自制的氧化锆基台与种植体能由间隙配合达到过渡配合状态,边缘封闭性良好。 2.模拟口腔内种植体骨水平植入方式更接近口腔内真实条件,检测得到基台的抗折强度更加可靠可信。
[Abstract]:Objective: to develop zirconia base set, to detect its coordination with implants and to study its flexural strength for clinical application. Methods: Nano-zirconia powder was used to fabricate the implant abutment of Zirconia teeth matched with Dentium Superline system, and the optical imaging instrument was used to detect the standard of Zirconia abutment, and to eliminate the unqualified abutment according to the tolerance requirement. Forty Zirconia bases and 40 Dentium Superline implants were randomly selected. The Zirconia base and Dentium Superline implants were assembled and fixed with central retention screws. Digora for windows2.6 software was used to measure the matching state of the two systems, and the torsional torque was 30N cm. Then the components were randomly divided into two groups (20 in each group). The two groups were fixed in two different ways in stainless steel fixture and placed in a universal testing machine. Group A was imitated by horizontal implant implantation in oral cavity. The distance between the upper end plane of the implant and the fixture plane was 3mm). Group B was imitated with the implant bone horizontal implantation (the distance between the upper end plane and the clamp plane was 0mm). The head of the universal testing machine is at 90 掳angle with the long axis of the implant / zirconia base assembly. The head is located on the base platform located at the plane of 3mm from the upper end of the implant. The pressure is applied to the base at the loading speed of the 0.5mm/min until the base is damaged. The pressure data of the universal testing machine when the base platform was damaged were recorded, and two sets of data were tested by SPSS 17.0 statistical software. Results: 1. Coordination of Zirconia Base with Implant: X-ray diffraction results show that the Zirconia base and implant are assembled with central retainer screw to fix the post and the base moves 0.18 卤0.02 mm to the implant on average, and its taper is connected. The microgap is closed, To the transition state. 2. The average flexural strength of Zirconia base set in group A was 282.93 卤17.28 Nu B, the average flexural strength of group B was 420.72 卤13.64 NX, the difference was statistically significant (P0.05). Conclusion: 1. The self-made zirconia base and implant have the transition fit state from the gap fit, and the edge closure is good. 2. The method of simulating oral implant bone level implantation is closer to the true condition of oral cavity, and the flexural strength of the abutment is more reliable.
【学位授予单位】：青岛大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R783.6

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