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作者介绍了一种既能保留更多牙体组织又能预防继发龋发生的治疗后牙邻面龋损的方法,叫做预防性II类洞充填法. 窝洞制备的特点是:从(牙合)面牙釉质边缘入口制作盒状洞形,(牙合)面不作鸠尾,盒状洞内壁互相垂直,线角圆钝,在舌轴壁和颊轴壁上作固位沟。用釉质凿、釉质斧和龈缘釉质修整器修整各釉质壁直至平滑。为预防与(牙合)面洞缘相连的沟裂发生继发龋,用窝沟封闭剂将其封闭之.选用银汞合金或后牙复合树脂作充填材料,取决于邻面洞的部位和范围。若不考虑美观的话,银汞合金仍是首选的充填材料。如选用后牙复合树脂充填则楔状隙之各壁应作洞斜面.根据选用的充填材料选择垫底
The authors describe a method for preserving the presence of more carious tissues and preventing the occurrence of secondary caries in the treatment of the adjacent carious lesions of the teeth called preventive class II filling method. Coincident) enamel edge of the entrance of the production of box-shaped hole, (do not occlusal) face do not dovetail, box-shaped hole perpendicular to each other, the line angle blunt, in the lingual axis wall and buccal shaft wall for retention groove. Enamel chisels, enamel axles, and gingival enamel dressers trim each enamel wall until smooth. In order to prevent secondary occlusion of the cleft lip connected to the occlusal surface, the sealant is sealed with a pit and fissure sealant.Using amalgam or posterior teeth composite resin as filling material depends on the location of the adjacent hole and range. Silver-amalgam is still the preferred filling material, regardless of aesthetics. Such as the use of composite resin filling the back teeth of the wedge-shaped wall of the wall should be made for the slope.According to the choice of filling material bottom