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.
结论根管治疗后用光固化树脂充填前磨牙的各类洞，牙体的抗折强度优于用银汞充填者。
Conclusion the fracture strength of premolar teeth filled with light curing composite resin was higher than filled with amalgam after root canal therapy.
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