Parirokh M, Asgary S, Eghbal M J, Stowe S, Kakoei S
Endodontic Department, Kerman Dental School, Kerman, Iran.
Int Endod J. 2004 Nov;37(11):776-81. doi: 10.1111/j.1365-2591.2004.00873.x.
To examine plaque accumulation on silk and polyvinylidene fluoride (PVDF) sutures at different time intervals.
Twenty-one male albino rabbits received sutures under general and local anaesthesia. After 3, 5 and 7 days sutures were removed and processed for scanning electron microscope (SEM) observation. The Friedman and the Wilcoxon tests were used to compare contamination on PVDF and silk suture materials at different time intervals.
At all time intervals, the whole surface of silk sutures was covered with a thick layer of bacterial plaque and debris. Microorganisms and blood cells on the surface and between the filaments of the silk suture material were observed. Light debris appeared around the knot area of PVDF sutures after 3 days. At 5 and 7 days, contamination could be seen in scattered areas along the suture material. The average contaminated area was smaller on PVDF suture materials, which were removed at 5 than at 7 days after insertion. At 3 days, PVDF sutures showed significantly less contamination than at 5 and 7 days (P = 0.002). There were statistically significant differences between silk and PVDF sutures at 3, 5 and 7 days.
SEM observation showed that PVDF sutures were contaminated less than silk sutures at 3, 5 and 7 days.
研究不同时间间隔下丝线和聚偏二氟乙烯（PVDF）缝线表面菌斑的积聚情况。
21只雄性白化兔在全身麻醉和局部麻醉下接受缝线缝合。在术后3天、5天和7天拆除缝线，并进行扫描电子显微镜（SEM）观察。采用Friedman检验和Wilcoxon检验比较不同时间间隔下PVDF和丝线缝合材料的污染情况。
在所有时间间隔内，丝线缝线的整个表面都覆盖着一层厚厚的菌斑和碎屑。观察到丝线缝合材料的丝间和表面存在微生物和血细胞。PVDF缝线在术后3天，结扣区域周围出现少量碎屑。在术后5天和7天，沿缝线材料可见散在的污染区域。PVDF缝合材料在术后5天取出时的平均污染面积小于术后7天取出时的污染面积。术后3天，PVDF缝线的污染程度显著低于术后5天和7天（P = 0.002）。在术后3天、5天和7天，丝线和PVDF缝线之间存在统计学显著差异。
扫描电子显微镜观察显示，在术后3天、5天和7天，PVDF缝线的污染程度低于丝线缝线。
