畸形中央尖：在颌面中央窝处有一个额外的锥形牙尖 继发龋（secondary caries）：龋病经治疗之后，龋洞周围又发生龋坏，X线上为填充物周 围不规则低密度影 椒盐征：颈动脉体瘤在MRI 检查时，病变在T1 加权像表...
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（三）继发性龋(secondary caries) 1、定义：继发性龋是龋病治疗后由 于充填物边缘或窝洞周围牙体组织 破裂，或修复材料与牙体组织不密 合，或因治疗时未除净病变组...
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secondary caries 继发龋，龋病治疗后由于充填物边缘或窝洞 周围牙体组织破裂，形成菌斑滞留区；或修复材料与牙体组织不密合，形成微渗漏，都可能 产生龋病，称继发龋。
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A represents ART sealing teeth, B represents resin sealing teeth, and C represents control teeth. Two methods were compared by tooth retention rates, secondary caries rate and cost-benefit analysis (CBA) after 6 months and 18 months.
对比两种方法使用后6个月,18个月的保留率、继发龋率,并对两种方法进行成本-效益分析(cost-benefit analysis CBA)。
参考来源 - 广州市幼儿园3岁幼儿龋病的流行病学研究·2,447,543篇论文数据，部分数据来源于NoteExpress
After 6 months, secondary caries rate was recorded.
治疗6个月后复查患牙的继发龋情况。
It is discovered that secondary caries and losing of retention are the main reasons for the failure of fixed prostheses.
研究发现，继发龋和冠固位丧失是固定修复失败的主要原因。
Secondary caries occurs on the edge of the restoration. It is the major reason for replacing restoration and causing failure of treatment in clinic.
继发龋是龋病治疗后再度发生的龋损，是迄今为止临床上充填体更换和失败最常见的原因。
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