可切削聚合物渗透陶瓷牙科修复材料的制备研究
发布时间：2018-07-22 11:55
【摘要】：随着CAD/CAM在牙科修复治疗方面的应用日益成熟,传统配套的可切削材料主要为全瓷材料,其脆性大、模量高,对自然牙齿磨耗较大,研制一种性能接近自然牙齿的可切削牙科修复材料具有显著意义。本研究选用长石陶瓷粉或钡玻璃粉进行压制成型、部分烧结后形成多孔陶瓷,在真空辅助下,利用毛细作用将齿科树脂双酚A甲基丙烯酸缩水甘油/二甲基丙烯酸三甘油酯(BisGMA/TEGDMA)真空渗透进多孔陶瓷,树脂固化后形成树脂-陶瓷互穿网络结构,即得到树脂渗透陶瓷材料,它综合了树脂材料和陶瓷材料的优势,具有良好的可切削性,且模量和硬度与自然牙匹配度高。主要工作如下:1.重点开展了基于长石陶瓷粉的多孔陶瓷(3 mm厚)制备和树脂渗透工艺研究。首先,考察了烧结条件对长石多孔陶瓷收缩率与孔隙率的影响,并结合断面孔隙形貌观察,确定优化的烧结温度为755℃,烧制后多孔长石陶瓷的平均孔隙率在20%到25%之间。其次,探究了真空浸渍工艺对树脂渗透陶瓷材料性能的影响,发现:延长真空保持的时间("g30min)和增加树脂浸渍的次数("g3次),有利于树脂对多孔陶瓷的完全浸润。第三,用KH570偶联剂对多孔陶瓷内部孔道进行偶联接枝后,有利于树脂对多孔陶瓷的渗透,有利于树脂与陶瓷的界面粘结性,增加树脂渗透陶瓷材料的力学强度。最后,根据对所获得树脂渗透陶瓷材料的性能(弯曲强度、威布尔模数、弹性模量、断裂韧性、维氏硬度、耐磨耗)进行对比研究,确定当BisGMA/TEGDMA比例为6:4时,材料的综合性能最佳,弯曲强度达到140-150 MPa,威布尔模数为22.1(2.1),弹性模量为30(4) GPa,断裂韧性为1.64(0.12) MPam1/2,维氏硬度为5.2(1.3)GPa,磨耗量为8.21(1.33) mm2。由此,得到了一种性能接近自然牙齿的可切削牙科修复材料。2.对比研究了不同厚度(3mm、12mm)长石多孔陶瓷块的烧结和树脂渗透制备。发现当陶瓷块的厚度增加后,由于陶瓷块内部散热速度的限制影响,烧结温度需适当降低至725℃,才能保证陶瓷块良好的多孔结构和适宜的孔隙率。对此12mm的多孔长石陶瓷,选用BisGMA/TEGDMA (6:4)树脂进行真空辅助渗透,得到的树脂渗透陶瓷材料,各项性能与前述结果相近,可采用市面上多数的CAD/CAM设备进行切削。3.考虑到长石陶瓷粉的成本较高,本研究还选用齿科复合树脂常用的钡玻璃粉进行了探索研究。由于商品化的钡玻璃粉本身是经过硅烷偶联剂改性的,经过多种制备工艺探索,确定树脂渗透钡玻璃陶瓷材料的制备可简化为压制得到多孔陶瓷后,直接树脂渗透,由于树脂与钡玻璃粉具有相近的折光指数,树脂固化后可得到透明的树脂渗透钡玻璃陶瓷材料,力学性能发现还要优于长石质材料,更接近自然牙齿。4.探索了在长石陶瓷中掺杂结晶性的氧化铝或氧化锆对树脂渗透陶瓷材料成型工艺参数和材料性能的影响,发现它们的加入,对陶瓷烧结工艺、断面形貌和孔隙率有明显影响,但并未能明显提高材料的力学强度,对提高断裂韧性有一定作用。本研究制备的两类树脂渗透陶瓷材料,性能优异,有望作为齿科诊疗的可切削模型材料和修复材料。
[Abstract]:With the increasingly mature application of CAD/CAM in dental repair and treatment, the traditional complementary Machinable materials are mainly full porcelain materials, which have great brittleness, high modulus and high wear to natural teeth. It is significant to develop a machinable dental restorable material with a performance close to the natural teeth. A porous ceramic was formed after a partial sintering. Under the aid of vacuum, the dental resin, bisphenol A methacrylic acid glycidyl methacrylic acid (BisGMA/TEGDMA) / two glyceryl methacrylate (BisGMA/TEGDMA) was vacuum penetrated into the porous ceramic, and the resin ceramic ceramic interpenetrating network structure was formed after the resin curing, and the resin permeated ceramic material was obtained. It combines the advantages of resin and ceramic materials, has good machinability, and has high modulus and hardness with natural teeth. The main work is as follows: 1. the preparation of porous ceramics (3 mm thick) based on feldspar ceramics and the study of resin permeability are mainly carried out. First, the shrinkage and pore of the porous ceramics of the feldspar ceramics are investigated. The optimum sintering temperature is 755 C, and the average porosity of the porous feldspar ceramics is between 20% and 25% after the burning. Secondly, the effect of vacuum impregnation on the properties of the resin permeable ceramic material is explored, and the time of prolonging the vacuum retention ("g30min") and the increase of the resin impregnation are found. The number ("G3 time") is beneficial to the full infiltration of the porous ceramic with the resin. Third, the coupling grafting of the porous ceramics through the coupling agent of KH570 coupling agent is beneficial to the permeation of the porous ceramics, the interfacial bonding between the resin and the ceramic, and the increase of the mechanical strength of the resin permeated the ceramic material. Finally, the permeability of the resin is obtained. The properties of ceramic materials (bending strength, Weibull modulus, modulus of elasticity, fracture toughness, Vivtorinox hardness, wear resistance) were compared. When the ratio of BisGMA/TEGDMA was 6:4, the composite properties were the best, the bending strength reached 140-150 MPa, the Weibull modulus was 22.1 (2.1), the modulus of elasticity was 30 (4) GPa, and the fracture toughness was 1.64 (0.12) MPam1. /2, the hardness of Vivtorinox is 5.2 (1.3) GPa, and the wear amount is 8.21 (1.33) mm2., thus a machinable dental restorable material with properties close to the natural tooth.2. is obtained. The sintering and resin penetration of different thickness (3mm, 12mm) feldspar ceramic blocks are compared. In order to limit the effect, the sintering temperature should be reduced to 725 C to ensure the good porous structure and suitable porosity of the ceramic block. The porous 12mm ceramics, BisGMA/TEGDMA (6:4) resin is selected for vacuum assisted infiltration, and the resin permeated ceramic materials are obtained. The properties of the ceramics are similar to those of the previous results, and most of the CA in the market can be used. D/CAM equipment is cutting.3. to consider the high cost of feldspar ceramic powder. This study also selected the barium glass powder commonly used in dental composite resin. The commercialized barium glass powder itself is modified by silane coupling agent and through a variety of preparation techniques, the preparation of barium permeable glass ceramic material can be determined. In order to suppress the porous ceramics, the resin permeated directly. As the resin and barium glass powder have a similar refractive index, the resin can get transparent barium permeable glass ceramics after curing, and the mechanical properties are better than the long stone material, which is closer to the natural tooth.4. to explore the crystalline oxidation in the feldspar ceramics. The effect of aluminum or zirconia on the molding process parameters and material properties of the resin permeated ceramic materials has been found. It is found that the addition of them has an obvious influence on the ceramic sintering process, the cross-section morphology and porosity, but it has not obviously improved the mechanical strength of the material and has a certain effect on the improvement of fracture toughness. Two kinds of resin permeable ceramic materials prepared in this study are made. It is expected to be a machinable model material and restorative material for dental diagnosis and treatment.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ174.7;R783.1
本文编号：2137387
[Abstract]:With the increasingly mature application of CAD/CAM in dental repair and treatment, the traditional complementary Machinable materials are mainly full porcelain materials, which have great brittleness, high modulus and high wear to natural teeth. It is significant to develop a machinable dental restorable material with a performance close to the natural teeth. A porous ceramic was formed after a partial sintering. Under the aid of vacuum, the dental resin, bisphenol A methacrylic acid glycidyl methacrylic acid (BisGMA/TEGDMA) / two glyceryl methacrylate (BisGMA/TEGDMA) was vacuum penetrated into the porous ceramic, and the resin ceramic ceramic interpenetrating network structure was formed after the resin curing, and the resin permeated ceramic material was obtained. It combines the advantages of resin and ceramic materials, has good machinability, and has high modulus and hardness with natural teeth. The main work is as follows: 1. the preparation of porous ceramics (3 mm thick) based on feldspar ceramics and the study of resin permeability are mainly carried out. First, the shrinkage and pore of the porous ceramics of the feldspar ceramics are investigated. The optimum sintering temperature is 755 C, and the average porosity of the porous feldspar ceramics is between 20% and 25% after the burning. Secondly, the effect of vacuum impregnation on the properties of the resin permeable ceramic material is explored, and the time of prolonging the vacuum retention ("g30min") and the increase of the resin impregnation are found. The number ("G3 time") is beneficial to the full infiltration of the porous ceramic with the resin. Third, the coupling grafting of the porous ceramics through the coupling agent of KH570 coupling agent is beneficial to the permeation of the porous ceramics, the interfacial bonding between the resin and the ceramic, and the increase of the mechanical strength of the resin permeated the ceramic material. Finally, the permeability of the resin is obtained. The properties of ceramic materials (bending strength, Weibull modulus, modulus of elasticity, fracture toughness, Vivtorinox hardness, wear resistance) were compared. When the ratio of BisGMA/TEGDMA was 6:4, the composite properties were the best, the bending strength reached 140-150 MPa, the Weibull modulus was 22.1 (2.1), the modulus of elasticity was 30 (4) GPa, and the fracture toughness was 1.64 (0.12) MPam1. /2, the hardness of Vivtorinox is 5.2 (1.3) GPa, and the wear amount is 8.21 (1.33) mm2., thus a machinable dental restorable material with properties close to the natural tooth.2. is obtained. The sintering and resin penetration of different thickness (3mm, 12mm) feldspar ceramic blocks are compared. In order to limit the effect, the sintering temperature should be reduced to 725 C to ensure the good porous structure and suitable porosity of the ceramic block. The porous 12mm ceramics, BisGMA/TEGDMA (6:4) resin is selected for vacuum assisted infiltration, and the resin permeated ceramic materials are obtained. The properties of the ceramics are similar to those of the previous results, and most of the CA in the market can be used. D/CAM equipment is cutting.3. to consider the high cost of feldspar ceramic powder. This study also selected the barium glass powder commonly used in dental composite resin. The commercialized barium glass powder itself is modified by silane coupling agent and through a variety of preparation techniques, the preparation of barium permeable glass ceramic material can be determined. In order to suppress the porous ceramics, the resin permeated directly. As the resin and barium glass powder have a similar refractive index, the resin can get transparent barium permeable glass ceramics after curing, and the mechanical properties are better than the long stone material, which is closer to the natural tooth.4. to explore the crystalline oxidation in the feldspar ceramics. The effect of aluminum or zirconia on the molding process parameters and material properties of the resin permeated ceramic materials has been found. It is found that the addition of them has an obvious influence on the ceramic sintering process, the cross-section morphology and porosity, but it has not obviously improved the mechanical strength of the material and has a certain effect on the improvement of fracture toughness. Two kinds of resin permeable ceramic materials prepared in this study are made. It is expected to be a machinable model material and restorative material for dental diagnosis and treatment.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ174.7;R783.1
【参考文献】
相关期刊论文 前4条
1 梁慧刚;黄可;;生物医用高分子材料的发展现状和趋势[J];新材料产业;2016年02期
2 刘峰;;全瓷修复材料和方法的分化[J];国际口腔医学杂志;2011年04期
3 陈霜;李国强;;齿科修复材料耐磨性及硬度与天然牙齿的比较[J];中国组织工程研究与临床康复;2011年03期
4 章非敏,赵云凤;Vita MarkⅡ牙体修复材料遮色能力的研究[J];华西口腔医学杂志;2003年06期
相关硕士学位论文 前1条
1 孙平;烤瓷合金细胞毒性及腐蚀性初步研究[D];浙江大学;2004年
，本文编号：2137387
本文链接：https://www.wllwen.com/kejilunwen/huagong/2137387.html
