目的初步探讨可摘局部义齿卡环对基牙健康的影响。方法对铸造、冷弯卡环可摘局部义齿初戴一周前后，基牙菌斑中的主要致龋菌进行分析比较。结果铸造卡环组初戴一周后，基牙菌斑中粘性放线菌与变形链球菌的百分比分别上升了２３％和３８％；冷弯卡环组初戴一周后，上述细菌百分比分别上升了５９％和３３％，二者间差异有显著性；铸造卡环组粘性放线菌上升的百分比显著低于冷弯卡环组。结论可摘局部义齿卡环会增加基牙患龋的危险性，但铸造卡环对基牙健康的影响小于冷弯卡环 Objective To investigate the effect of removable partial denture clasp on the abutment health. Methods The main cariogenic bacteria in the dental plaque were analyzed and compared before and after one week of casting and cold snap ring removable partial denture. Results The percentage of viscous actinomycetes and Streptococcus mutans in the dental plaque increased by 1% and 38%, respectively, after one week of initial casting in the cast ring group. After the first week of cold snap ring group, the above bacteria The percentage increased by 59% and 33% respectively, the difference was significant. The percentage increase of viscous actinomycetes in casting ring group was significantly lower than that in cold snap ring group. Conclusion Removable partial denture snap ring will increase the risk of tooth decay, but casting ring on the abutment health is less than the cold snap ring