对cod重铬酸钾回流法中的主要干扰离子，氯化物的消除，选择了用硫酸银代替硫酸汞做掩蔽剂。
To remove main disturbing ion, chlorine ion in the COD potassium dichromate reflux method, silver sulfate replaces mercury sulfate as a screening agent.
结论：临床上牙本质粘结剂能改善银汞充填体的固位力和密合度。
Conclusion: Clinically dentin adhesive agents can improve the retentive force and adaption of amalgam restorations.
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