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为探讨可摘局部义齿与基牙龋坏之间的潜在关系，对戴入可摘局部义齿后基牙易发龋坏部位早期的细菌组成进行了测定。结果：不同牙位在同一时期以及同一牙位的不同部位在不同时期的细菌检出百分比无显著性差异，球菌在初期较高，中期下降，后期上升，杆菌则相反。戴牙后７天、１４天、２１天和三个月细菌组成变化较大，但三个月后球菌和杆菌已恢复到常态指标。三种主要致龋菌均被检出，变形链球菌为优势菌，呈逐渐上升趋势，在７上的检出率较５高，差异有高度显著性（Ｐ＜０．００５）。粘性放线菌、乳酸杆菌检出率较低。由此提示，戴用可摘局部义齿可造成口腔微生态环境的改变，促进某些条件致龋菌的生长，成为基牙发生龋坏的潜在因素。
In order to explore the potential relationship between removable partial dentures and abutment decay, the early bacterial composition of the deciduous parts of prone abutments after wearing removable partial dentures was determined. Results: There was no significant difference in the percentage of bacteria detected at different stages among different teeth at the same time and in the same tooth position. The rates of bacteria were higher in the early period, lower in the middle period and increased in the later period, while the bacilli were the opposite. Bacterial composition varied greatly at 7 days, 14 days, 21 days and 3 months after wearing the teeth, but after 3 months the cocci and bacilli had returned to the normal indexes. Three major cariogenic bacteria were detected, Streptococcus mutans was the dominant bacteria, showing a gradual upward trend in the detection rate of 7 higher than 5, the difference was highly significant (P <0.005). Viscous actinomycetes, Lactobacillus detection rate is low. This suggests that wearing removable partial dentures can cause changes in the micro-ecological environment of the oral cavity to promote the growth of cariogenic bacteria in certain conditions and become a potential factor for the decay of abutments.