CN108618969A - 一种仿生陶瓷牙修复体的制作方法 - Google Patents

一种仿生陶瓷牙修复体的制作方法 Download PDF

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CN108618969A
CN108618969A CN201810116582.8A CN201810116582A CN108618969A CN 108618969 A CN108618969 A CN 108618969A CN 201810116582 A CN201810116582 A CN 201810116582A CN 108618969 A CN108618969 A CN 108618969A
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孙玉春
周永胜
王勇
李榕
赵姣
赵一姣
杨欣
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Peking University School of Stomatology
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Abstract

本发明涉及一种仿生陶瓷牙修复体的制作方法:选取常规高强度、低透明度3mol%钇稳定二氧化锆陶瓷和低强度、高透明度陶瓷作为预制粉料;分层压制坯料块/盘;过渡缓冲层自坯料的下表面到上表面,3mol%钇稳定二氧化锆陶瓷所占比例从100%逐渐降低至0,低强度、高透明度陶瓷所占比例从0逐渐增加至100%;将牙齿修复体CAD数字模型的咬合面或美观区域摆放于仿生性能/色彩层,轴面区域摆放于高强度抗折裂层;采用牙齿修复体制造设备完成制作。本发明能解决高强度单层全氧化锆修复体对对颌牙过度磨损的问题、种植全瓷修复时无应力缓冲的问题、全部应用仿生耐磨耗陶瓷材料时修复体易远期折断的问题,同时实现修复体的仿生色彩效果。

Description

一种仿生陶瓷牙修复体的制作方法
技术领域
本发明涉及一种牙修复体制作,具体涉及一种仿生陶瓷牙修复体的制作方法。
背景技术
目前,氧化锆因其优良的生物相容性和弯曲强度成为修复牙体缺损、牙列缺损常用的材料。但目前使用的全氧化锆牙冠因其机械性能过度强化,临床使用过程中存在对对颌牙造成过度磨损、种植全瓷修复时无应力缓冲的问题。并且由于色彩单一,无法满足美学修复需求。
本发明能解决高强度、单一色彩单层全氧化锆修复体对对颌牙过度磨损以及美学透明度不足的问题、种植全瓷修复时无应力缓冲的问题、全部应用仿生耐磨耗陶瓷材料时修复体易远期折断的问题,以及由于烧结收缩比差异易导致双层陶瓷修复体发生层间断裂的问题,可在实现咬合面局部磨损性能仿生(与生理磨耗的速度同步、等量磨损)的同时,实现受到过大咬合力时对天然牙根与种植体骨结合界面的保护,并保证整体强度高不易折裂,同时实现修复体的仿生色彩效果,利于普及应用。
发明内容
为了克服以上不足,本发明提供一种仿生陶瓷牙修复体的制作方法,能解决高强度、单一色彩单层全氧化锆修复体对对颌牙过度磨损的问题以及美学透明度不足的问题、种植全瓷修复时无应力缓冲的问题、全部应用仿生耐磨耗陶瓷材料时修复体易远期折断的问题,以及由于烧结收缩比差异易导致双层陶瓷修复体发生层间断裂的问题,可在实现咬合面局部磨损性能仿生(与生理磨耗的速度同步、等量磨损)的同时,实现受到过大咬合力时对天然牙根及种植体骨结合界面的保护,并保证整体强度高不易折裂,还可实现修复体的仿生色彩效果,利于普及应用。
为了达到上述目的,本发明有如下技术方案:
本发明的一种仿生陶瓷牙修复体的制作方法,有以下步骤:
1)、选取常规高强度、低透明度3mol%钇稳定二氧化锆陶瓷和低强度、高透明度陶瓷作为两种预制粉料,将两种预制粉料按照下述不同体积比例进行混合:混合比例分别为1:9、2:8、3:7、4:6、5:5、6:4、7:3、8:2、9:1的均匀混合粉料,留着备用;2)、采用冷等静压设备分层压制坯料块/盘,坯料分为三层,上层为仿生性能/色彩层,中层为过渡缓冲层,下层为高强度抗折裂层;3)、缓冲层自坯料的下表面到上表面,常规高强度、低透明度3mol%钇稳定二氧化锆陶瓷所占比例从100%逐渐降低至0,低强度、高透明度陶瓷所占比例从0逐渐增加至100%;4)、用该坯料制作牙齿修复体时,将牙齿修复体CAD数字模型的咬合面或美观区域,摆放于仿生性能/色彩层,轴面区域摆放于高强度抗折裂层;5)、利用上述制作完成的坯料,采用数字化制作牙齿修复体设备完成牙齿修复体的制作。
其中,所述步骤5)的数字化制作牙齿修复体设备包括采用义齿制作CAD/CAM系统中应用的切削设备。
其中,所述步骤1)的均匀混合粉料,也能采用3D打印的增材成形设备,完成牙齿修复体的制作。
其中,所述高强度、低透明度3mol%钇稳定二氧化锆陶瓷为:3mol%Y2O3,HfO2<5.0wt%,Al2O3≦0.1wt%,SiO2≦0.02wt%,Fe2O3≦0.01wt%,Na2O(wt%)≦0.04,其余成分为ZrO2。
其中,所述低强度、高透明度陶瓷包括玻璃陶瓷、5mol%-8mol%二氧化锆或聚合瓷。
本发明的优点在于:
本发明能解决高强度、单一色彩单层全氧化锆修复体对对颌牙过度磨损的问题以及美学透明度不足的问题、种植全瓷修复时无应力缓冲的问题、全部应用仿生耐磨耗陶瓷材料时修复体易远期折断的问题,以及由于烧结收缩比差异易导致双层陶瓷修复体发生层间断裂的问题,可在实现咬合面局部磨损性能仿生(与生理磨耗的速度同步、等量磨损)的同时,实现受到过大咬合力时对天然牙根及种植体骨结合界面的保护,并保证整体强度高不易折裂,还可实现修复体的仿生色彩效果,利于普及应用。
具体实施方式
以下实施例用于说明本发明,但不用来限制本发明的范围。
本发明的一种仿生陶瓷牙修复体的制作方法,有以下步骤:
1)、选取常规高强度、低透明度3mol%钇稳定二氧化锆陶瓷和低强度、高透明度陶瓷作为两种预制粉料,将两种预制粉料按照下述不同体积比例进行混合:混合比例分别为1:9、2:8、3:7、4:6、5:5、6:4、7:3、8:2、9:1的均匀混合粉料,留着备用;2)、采用冷等静压设备分层压制坯料块/盘,坯料分为三层,上层为仿生性能/色彩层,中层为过渡缓冲层,下层为高强度抗折裂层;3)、过渡缓冲层自坯料的下表面到上表面,常规高强度、低透明度3mol%钇稳定二氧化锆陶瓷所占比例从100%逐渐降低至0,低强度、高透明度陶瓷所占比例从0逐渐增加至100%;4)、用该坯料制作牙齿修复体时,将牙齿修复体CAD数字模型的咬合面或美观区域,摆放于仿生性能/色彩层,轴面区域摆放于高强度抗折裂层;5)、利用上述制作完成的坯料,采用数字化制作牙齿修复体设备完成牙齿修复体的制作。
所述步骤5)的数字化制作牙齿修复体设备包括采用义齿制作CAD/CAM系统中应用的切削设备。如采用Wieland Dental,Zenotec T1数控切削仪。
所述步骤1)的均匀混合粉料,也能采用3D打印的增材成形设备,完成牙齿修复体的制作。
3D打印实现的方法为:选取常规高强度、低透明度3mol%钇稳定二氧化锆陶瓷和低强度、高透明度陶瓷作为两种预制粉料,将两种预制粉料按照下述不同体积比例进行混合:混合比例分别为1:9、2:8、3:7、4:6、5:5、6:4、7:3、8:2、9:1的均匀混合粉料,用多喷头陶瓷3D打印机直接打印即可。
所述常规高强度、低透明度3mol%钇稳定二氧化锆陶瓷为:3mol%Y2O3,HfO2<5.0wt%,Al2O3≦0.1wt%,SiO2≦0.02wt%,Fe2O3≦0.01wt%,Na2O wt%≦0.04,其余成分为ZrO2。
所述低强度、高透明度陶瓷包括玻璃陶瓷、5mol%-8mol%二氧化锆或聚合瓷。
牙齿美观区域:是指上下颌前牙、第一前磨牙(个别开口度较大的可延伸至第二前磨牙)的唇颊面,以及上下颌前牙的切端部分。
如上所述,便可较为充分的实现本发明。以上所述仅为本发明的较为合理的实施实例,本发明的保护范围包括但并不局限于此,本领域的技术人员任何基于本发明技术方案上非实质性变性变更均包括在本发明包括范围之内。

Claims (5)

1.一种仿生陶瓷牙修复体的制作方法,其特征在于有以下步骤:
1)、常规高强度、低透明度3mol%钇稳定二氧化锆陶瓷和低强度、高透明度陶瓷作为两种预制粉料,将两种预制粉料按照下述不同体积比例进行混合:混合比例分别为1:9、2:8、3:7、4:6、5:5、6:4、7:3、8:2、9:1的均匀混合粉料,留着备用;
2)、采用冷等静压设备分层压制坯料块/盘,坯料分为三层,上层为仿生性能/色彩层,中层为过渡缓冲层,下层为高强度抗折裂层;
3)、过渡缓冲层自坯料的下表面到上表面,常规高强度、低透明度3mol%钇稳定二氧化锆陶瓷所占比例从100%逐渐降低至0,低强度、高透明度陶瓷所占比例从0逐渐增加至100%;
4)、用该坯料制作牙齿修复体时,将牙齿修复体CAD数字模型的咬合面/美观区域,摆放于仿生性能/色彩层,轴面区域摆放于高强度抗折裂层;
5)、利用上述制作完成的坯料,采用数字化制作牙齿修复体设备完成牙齿修复体的制作。
2.根据权利要求1所述的一种仿生陶瓷牙修复体的制作方法,其特征在于:
所述步骤5)的数字化制作牙齿修复体设备包括采用义齿制作CAD/CAM系统中应用的切削设备。
3.根据权利要求1所述的一种仿生陶瓷牙修复体的制作方法,其特征在于:
所述步骤1)的均匀混合粉料,也能采用3D打印的增材成形设备,完成牙齿修复体的制作。
4.根据权利要求1所述的一种仿生陶瓷牙修复体的制作方法,其特征在于:所述常规高强度、低透明度3mol%钇稳定二氧化锆陶瓷为:3mol%Y2O3,HfO2<5.0wt%,Al2O3≦0.1wt%,SiO2≦0.02wt%,Fe2O3≦0.01wt%,Na2O wt%≦0.04,其余成分为ZrO2。
5.根据权利要求1所述的一种仿生陶瓷牙修复体的制作方法,其特征在于:所述低强度、高透明度陶瓷包括玻璃陶瓷、5mol%-8mol%二氧化锆或聚合瓷。
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