1 资料与方法
1.1 受试者纳入及排除标准
1.2 样本采集及DNA提取
1.3 16S rRNA测序及生物信息学分析
1.4 统计学分析
2 结果
2.1 样本纳入情况
2.2 菌群多样性分析
图1 菌群的多样性分析Figure 1 Analysis of microbial community diversity A, rarefaction curves based on ASVs; B, α diversity index (Shannon, Simpson, Chao1) of bacterial communities in the periapical lesions of PoAP without and with sinus tracts, Wilcoxon test was used to compare differences, Boxplots were used to present the median and quartiles; C, β diversity of bacterial communities in the periapical lesions of PoAP without and with sinus tracts; D, β diversity of bacterial communities in PoAP with different pathological manifestations; E, β diversity of bacterial communities in PoAP with different obturation qualities (adequate filling, underfilling, over-filling). ASVs, amplicon sequence variants; PoAP, post-treatment apical periodontitis; PCoA, principal coordinates analysis. |
2.3 菌群组成比较
图2 菌群物种组成及差异Figure 2 Comparison of microbial composition A, component of bacterial communities at phylum level in the periapical lesions of PoAP without and with sinus tracts; B, component of bacterial communities at genus level in the periapical lesions of PoAP without and with sinus tracts; C, comparison of bacterial communities at genus level in the periapical lesions of PoAP without and with sinus tracts. Wilcoxon test was used to compare differences followed by Benjamini-Hochberg FDR correction to convert P value to q value. Boxplots were used to present the median and quartiles. PoAP, post-treatment apical periodontitis; FDR, false discovery rate. |