CN102344285B - 改变牙科氧化锆材料透光性的方法 - Google Patents

改变牙科氧化锆材料透光性的方法 Download PDF

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CN102344285B
CN102344285B CN2011101839918A CN201110183991A CN102344285B CN 102344285 B CN102344285 B CN 102344285B CN 2011101839918 A CN2011101839918 A CN 2011101839918A CN 201110183991 A CN201110183991 A CN 201110183991A CN 102344285 B CN102344285 B CN 102344285B
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light transmission
dental
zirconium oxide
water
oxide material
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CN102344285A (zh
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王鸿娟
司文捷
严庆云
何玲玲
郑艳春
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Liaoning Upcera Biomaterial Co., Ltd.
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Liaoning Upcera Biomaterial Co Ltd
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Priority to PCT/CN2011/001934 priority patent/WO2013003990A1/zh
Priority to EP11866437.4A priority patent/EP2573060B1/en
Priority to TR2019/04442T priority patent/TR201904442T4/tr
Priority to PT11866437T priority patent/PT2573060T/pt
Priority to KR1020137030585A priority patent/KR101562610B1/ko
Priority to ES11866437T priority patent/ES2719818T3/es
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Abstract

本发明涉及一种改变牙科氧化锆材料透光性的方法。将经过预烧结的氧化锆通过浸泡或涂刷钇盐溶液，可使氧化锆材料满足年轻患者的前牙切端对材料透光性的要求，牙冠颈部到切端透光性渐变更自然，与天然牙接近；并且通过浸泡或涂刷钇盐溶液，牙冠的颜色呈现渐变的效果。同时，本发明操作方法简明，成本低，质量稳定。

Description

改变牙科氧化锆材料透光性的方法
技术领域
本发明涉及一种改变氧化锆材料性能的方法，尤其是改变牙科氧化锆材料透光性的方法。
背景技术
由于钇稳定四方相氧化锆陶瓷具有良好的生物相容性、优良的力学性能，尤其是断裂韧性远高于氧化铝陶瓷，从上世纪90年代起氧化锆陶瓷开始用于牙科固定修复体的底冠材料。但由于其透光率单一，用于年轻患者的前牙的美学修复时一般需要在加工后的内冠上上瓷，以模拟自然牙，增加导致基牙预备空间增大，而且由于氧化锆与饰瓷热膨胀系数差别较大、氧化锆与饰瓷之间没有形成很好的化学结合两方面原因，导致饰瓷与氧化锆的结合强度低，易出现饰瓷剥落；即崩瓷。氧化锆全瓷牙的临床结果表明，氧化锆全瓷牙5年以后的崩瓷率达到10%以上。
发明内容
本发明针对上述现有技术中存在的问题，提供一种改变牙科氧化锆材料透光性的方法，解决了现有技术中氧化锆材料透光性不能满足年轻患者前牙切端对材料透光性的要求的问题，而且本发明成本低、质量稳定。
本发明的技术方案如下：
配置可溶性钇盐浓度为10~73wt%的水、醇-水溶液，将经过预烧结的氧化锆浸泡在上述溶液中2~15分钟，干燥，最后将已干燥的氧化锆烧结体放入箱式高温电阻炉内于1400~1600℃烧结，保温2h，得到透光性渐变或整体透光性均很高的氧化锆材料。
所述的氧化锆烧结体采用涂刷可溶性钇盐溶液的方式，或者浸泡与涂刷可溶性钇盐溶液相结合的方式。
本发明的原理如下：
3Y-TZP为四方相，存在相变增韧，强度1000MPa以上，但是透光率较低，不能满足前牙美学的需要； 8Y-FSZ为立方相，各相同性，可获得半透明或全透明的材料，可满足年轻患者的前牙切端对材料透光性的要求，但由于不存在相变增韧，强度只有200MPa左右。通过浸泡和涂刷钇盐溶液的方式，增加Y含量，获得相组成为四方相和立方相混合的材料，从而提高材料的透光性，满足年轻患者的前牙切端对材料透光性的要求。而且由于透光性已满足美学要求，不需要再上瓷，从而避免了氧化锆与饰瓷之间膨胀系数差异而导致的出现的崩瓷现象。
本发明的优点效果如下：
通过浸泡或涂刷钇盐溶液，可使氧化锆材料满足年轻患者的前牙切端对材料透光性的要求，牙冠颈部到切端透光性渐变更自然，与天然牙接近；并且通过粉料本身添加着色剂或通过浸泡染色液染色的方式制备的牙冠，颜色没有渐变效果，通过浸泡或涂刷钇盐溶液，牙冠的颜色呈现渐变的效果。同时，本发明操作方法简明，成本低，质量稳定。
具体实施方式
本发明结合具体实施例，进行详细描述如下。
实施例1
首先配置浓度为10wt%的硝酸钇聚乙二醇-水溶液，将预烧结后的氧化锆部分浸泡于硝酸钇溶液15分钟中，取出，自然晾干，最后放入箱式高温电阻炉内于1400~1600℃烧结，保温2h，得透光性渐变成品。
对上述成品的技术指标进行测试如下：
⑴ 三点弯曲强度（取样参照氧化锆与饰瓷结合强度测试）
    设备：TH8201-S伺服式桌上型万能材料试验机测试。
试样尺寸：长度大于20mm，宽度4.0mm，厚度1.2mm跨距16mm，加载速度0.5mm/min。
测试结果：三点弯曲强度1076MPa。
实施例2
首先配置浓度为30wt%的硝酸钇水溶液，将预烧结后的氧化锆部分浸泡于硝酸钇溶液10分钟中，取出，自然晾干，最后放入箱式高温电阻炉内于1400~1600℃烧结，保温2h，得透光性渐变成品。
测试方法同实施例1，测试结果：三点弯曲强度953MPa。
实施例3
首先配置浓度为45wt%的硝酸钇聚乙二醇-水溶液，将预烧结后的氧化锆部分浸泡于硝酸钇溶液5分钟中，取出，自然晾干，最后放入箱式高温电阻炉内于1400~1600℃烧结，保温2h，得透光性渐变成品。
测试方法同实施例1，测试结果：三点弯曲强度904MPa。
实施例4
首先配置浓度为73wt%的硝酸钇聚乙二醇-水溶液，将预烧结后的氧化锆部分浸泡于硝酸钇溶液2分钟中，取出，自然晾干，最后放入箱式高温电阻炉内于1400~1600℃烧结，保温2h，得透光性渐变成品。
测试方法同实施例1，测试结果：三点弯曲强度873MPa。
实施例5
首先配置浓度为60wt%的硝酸钇丙三醇-水溶液，将上述硝酸钇丙三醇-水溶液涂刷在预烧结后的氧化锆烧结体上，自然晾干，最后放入箱式高温电阻炉内于1400~1600℃烧结，保温2h，得透光性渐变成品。
测试方法同实施例1，测试结果：三点弯曲强度898MPa。
实施例6
首先配置浓度为50wt%的硝酸钇四氢糠醇-水溶液，将将预烧结后的氧化锆部分浸泡于上述硝酸钇四氢糠醇-水溶液中3分钟，取出，自然晾干，再将上述硝酸钇四氢糠醇-水溶液涂刷在上述晾干后的氧化锆烧结体上，自然晾干，最后放入箱式高温电阻炉内于1400~1600℃烧结，保温2h，得透光性渐变成品。
测试方法同实施例1，测试结果：三点弯曲强度920MPa。

Claims (5)

1.改变牙科氧化锆材料透光性的方法，其特征在于包括下述步骤：配置可溶性钇盐浓度为10~73wt%的水、醇-水溶液，将经过预烧结的氧化锆浸泡在上述溶液中2~15分钟，干燥，最后将已干燥的氧化锆烧结体放入箱式高温电阻炉内于1400~1600℃烧结，保温2h，得到透光性渐变或整体透光性均很高的氧化锆材料。
2.根据权利要求1所述的改变牙科氧化锆材料透光性的方法，其特征在于可溶性钇盐浓度为45wt%。
3.根据权利要求1所述的改变牙科氧化锆材料透光性的方法，其特征在于所述的水、醇-水溶液中的醇为易溶于水的醇类。
4.根据权利要求3所述的改变牙科氧化锆材料透光性的方法，其特征在于所述的易溶于水的醇类为丙三醇、乙二醇、聚乙二醇600、四氢糠醇中的任一种。
5.根据权利要求1所述的改变牙科氧化锆材料透光性的方法，其特征在于所述的氧化锆烧结体浸泡在可溶性钇盐溶液中的方式，替换为采用涂刷可溶性钇盐溶液的方式，或者浸泡与涂刷可溶性钇盐溶液相结合的方式。
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