头灯放大镜在老年人上颌第一磨牙近颊第二根管治疗中的应用
두등방대경재노년인상합제일마아근협제이근관치료중적응용
Application of Headlight loupe used for the therapy of the second mesiobuccal canals in the first maxillary molars in Geriatric dentistry
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