中国实用口腔科杂志

中国实用口腔科杂志

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金属烤瓷冠调磨后产生颗粒对机体影响的探讨

赵 磊   

  1. 沈阳市第四人民医院口腔科
  • 收稿日期:2009-04-03 修回日期:2009-05-12 出版日期:2009-06-15 发布日期:2009-06-15

  • Received:2009-04-03 Revised:2009-05-12 Online:2009-06-15 Published:2009-06-15

摘要：

目的 探讨金属烤瓷冠调磨后的颗粒分布对机体尤其是肺组织产生的影响。方法 研究于2007年4月在中科院金属研究所完成。将中科院金属研究所提供的自制低镍烤瓷合金在一封闭空间内调磨，收集调磨后的颗粒，用Master sizer Macro型激光粒度分析仪分析颗粒的分布情况。结果 调磨后的瓷粉粒度分布较宽（直径0.3 ~ 300 μm），其中直径2 μm以下约占8.5%，5 μm以下约占19.5%;金属粒度分布亦较宽（直径0.9 ~ 300 μm），其中直径15 μm以下约占1.6%，5 μm以下约占0.55%，2 μm以下约占0.25%。结论 调磨后金属所产生的颗粒大部分较大，依照公共卫生学要求，推测其对肺组织的影响较小。而调磨后瓷粉产生的颗粒大部分较小，对肺组织影响较大，有造成尘肺的可能。

关键词: 烤瓷, 合金, 颗粒, 尘肺

Abstract:

Objective To analyze the particle spread of the self-made low-nickel porcelain alloy after grinding，and conclude whether it affects organism，especially the lung tissues. Methods The experiment was carried out in the Metal Institute，Chinese Academy of Sciences between April and May in 2007. The low-nickel porcelain alloy，offered by this institute，was grinded in a closed space，and the particles were collected to analyze the spread of the particle by Master sizer Macro laser particle analyzer. Results The range of the metal particle was fairly broad，covering the detection limit（0.3 - 300 μm）of the equipment. Generally the dust particles with a diameter of less than 15μm were considered as respirable dust. In this study，the percentage of the grinded particles with a diameter of below 15 μm，5 μm and 2 μm was 1.6%，0.55% and 0.25%，respectively. Conclusion Most metal particles are large and supposed to possess few influences on the lung tissues according to the public health standard. Transfer grinding of ceramic powder particles has a smaller majority but a greater impact on the lung tissue，causing the possibility of pneumoconiosis.

Key words: porcelain, alloy, particle, pneumoconiosis