Kara Tuncer Aysun
Department of Endodontics, Faculty of Dentistry, Bezmialem Vakıf University, Istanbul, Turkey.
J Endod. 2015 Feb;41(2):257-60. doi: 10.1016/j.joen.2014.10.014. Epub 2014 Nov 27.
The purpose of this study was to evaluate the effect of final irrigation with a new endodontic irrigant, QMix 2in1 (Dentsply Tulsa Dental, Tulsa, OK), on sealer penetration into dentinal tubules using confocal laser scanning microscopy.
Thirty recently extracted human maxillary incisors were used in the present study. The teeth were instrumented with sodium hypochlorite (NaOCl) irrigation and then divided into 3 groups according to the final irrigation regimen used: (1) control group, 2.5% NaOCl; (2) EDTA + CHX group, 17% (EDTA) followed by 2% chlorhexidine (CHX); and (3) QMix group, QMix 2in1. All teeth were dried and then obturated with gutta-percha and rhodamine B-labeled AH26 sealer (Dentsply DeTrey, Konstanz, Germany). After setting, the roots were sectioned horizontally 3, 5, and 8 mm from the root apex. Sealer penetration into the dentinal tubules was examined by confocal laser scanning microscopy.
In the apical sections of the roots, no significant difference was detected in the percentage of sealer penetration between any of the final irrigation groups (P > .05). Both the EDTA + CHX and QMix groups showed significantly more sealer penetration than the control group in the middle and coronal sections. However, no difference was found between the EDTA + CHX and QMix groups in either of these areas (P > .05) CONCLUSIONS: Use of EDTA + CHX or QMix during final irrigation significantly improved sealer penetration when compared with the control group in the middle and coronal sections of the roots; however, no effect was observed in the apical sections.
本研究的目的是使用共聚焦激光扫描显微镜评估一种新型牙髓冲洗剂QMix 2in1（登士柏 Tulsa Dental，塔尔萨，俄克拉何马州）进行最终冲洗对封闭剂渗入牙本质小管的影响。
本研究使用了30颗近期拔除的人上颌切牙。用次氯酸钠（NaOCl）冲洗器械处理这些牙齿，然后根据最终冲洗方案分为3组：（1）对照组，2.5% NaOCl；（2）EDTA + CHX组，17%（EDTA）然后是2%氯己定（CHX）；（3）QMix组，QMix 2in1。所有牙齿干燥后用牙胶和罗丹明B标记的AH26封闭剂（登士柏 DeTrey，康斯坦茨，德国）进行充填。凝固后，从根尖水平3、5和8 mm处横向切开牙根。通过共聚焦激光扫描显微镜检查封闭剂渗入牙本质小管的情况。
在牙根的根尖切片中，任何最终冲洗组之间封闭剂渗入百分比均未检测到显著差异（P > 0.05）。在牙根中部和冠部切片中，EDTA + CHX组和QMix组的封闭剂渗入均显著多于对照组。然而，在这两个区域中，EDTA + CHX组和QMix组之间均未发现差异（P > 0.05）。结论：与对照组相比，在牙根中部和冠部切片中，最终冲洗时使用EDTA + CHX或QMix可显著提高封闭剂的渗入；然而，在根尖切片中未观察到效果。
