固定义齿的孔隙度问题分析

Zhongguo yi liao qi xie za zhi = Chinese journal of medical instrumentation(2016)

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Abstract
含瓷质的固定义齿(烤瓷义齿和全瓷义齿)因其良好的强度和美观特征而受到缺失牙患者的广泛青睐,而产品的缺陷能直接或间接影响义齿修复的失效,因而对固定义齿中这两类义齿的质量把关尤为重要。通过分析日常送检固定义齿孔隙度试验的结果,结合孔隙的形状及位置分布特征,可知固定义齿孔隙度项目不合格率大于40%,不合格类别主要是存在直径>150 mm的孔隙。这可能是技工在刷瓷过程中引入气泡或异物所致。
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Key words
metal ceramic,al ceramic,denture,porosity
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