银汞合金充填对机体神经系统影响的调查

目的 了解银汞合金充填对机体神经系统的影响。方法 采用WHO NCTB和神经行为调查表，对银汞充填患者进行流行病学调查，并与对照组进行比较。结果 银充＞20a组数字跨度、数字译码得分明显低于银充1－20a组；认为自己有“记忆力减退”者，银充＞20a组明显多于银充1－20a组，提示长期接触汞合金与人群记忆力下降有某些内在关系。而19－29岁，30－39岁数字跨度，30－39岁数字译码实验组得分明显高于对照组，说明汞合金对记忆力并无不良影响。错误点数实验组得分明显高于对照组。银充＞20a出现“动作不灵活”者显著多于银充1－20a组。但同时，30－39岁，40－49岁两个年龄段，实验组正确点数和总点数得分也较对照组高，故不能确定汞合金对运动神经有负面影响。结论 目前尚不能认为银汞合金充填对人体神经系统有影响。

Research on the Effect of Amalgam Restoration on Human Nervous System

Objective To understand the influence of amalgam restorations on human nervous system.Methods WHO NCTB and neurobehavioral questionaire were used to make an epidemiologic investigation of people with amalgam restorations ,and compared them with the control groups.Results The scores of people whose teeth were filled with amalgam within 20 years were much higher than those beyond 20 years in digit span test and digit symbol test. In the latter group there were more people who thought they occurred 'memory descending' than the former. It indicated that there was some intra relation between long term amalgam contacting and memory descending. But in 19 29 and 30 39 age groups, the test group scored higher than the control group significantly in digit span test, and in digit symbol test the test group also had a score much higher than the control group in 30 39 age groups. This indicated that amalgam had no effect on memory. In pursuit aiming test II the error number of the test group was higher than that of the control group, and people who had amalgam restorations over 20 years occurring 'motion unflexible' were more than those within 20 years. But in the same time, in 30 39,40 49 age groups the test groups scored higher than the control groups in right number and sum number index, so we were not sure that amalgam do any harm to motor nerve. Conclusion It can not be determined that amalgam restorations have any effect on human nervous system currently. [