Ballal Nidambur Vasudev, Roy Amal, Zehnder Matthias
Department of Conservative Dentistry and Endodontics, Manipal College of Dental Sciences, Manipal, Manipal Academy of Higher Education, Manipal 576104, India.
Clinic of Conservative and Preventive Dentistry, University of Zurich, 8032 Zurich, Switzerland.
Polymers (Basel). 2021 Oct 11;13(20):3482. doi: 10.3390/polym13203482.
The conditioning of the root canal wall during chemo-mechanical root canal treatment differentially affects the adhesion of root canal sealers. This investigation evaluated the impact of sodium hypochlorite (NaOCl) concentration as used in a root canal irrigation concept called continuous chelation, with 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) contained in the NaOCl solution that is applied. Fourier-transform infrared spectra of the dentinal wall were gathered. The consequential effects on push-out bond strength of an epoxy resin (AH Plus) versus a hydraulic CaSi sealer (BioRoot RCS) were assessed. Single-rooted extracted human teeth were used and irrigated with pure NaOCl at a concentration of 0% (physiological saline), 2.5%, or 5.25%. Dual Rinse HEDP (9%) was added to the solutions, or not added for further control. Pure NaOCl solutions caused a decrease in the amide III: phosphate ratios, which was counter-acted by the addition of HEDP. It was observed that the adhesion of the epoxy resin sealer under investigation was negatively affected by this NaOCl deproteinization of the canal wall in a dose-dependent manner, while the opposite was observed with the CaSi sealer. HEDP when used in conjunction with NaOCl was beneficial for the adhesion of both sealers.
在化学机械根管治疗过程中，根管壁的预处理对根管封闭剂的黏附产生不同影响。本研究评估了在一种名为连续螯合的根管冲洗概念中使用的次氯酸钠（NaOCl）浓度的影响，该冲洗液中含有1-羟基亚乙基-1,1-二膦酸（HEDP）。收集了牙本质壁的傅里叶变换红外光谱。评估了对环氧树脂（AH Plus）与水硬性硅酸钙封闭剂（BioRoot RCS）的推出粘结强度的相应影响。使用单根拔除的人牙，并用浓度为0%（生理盐水）、2.5%或5.25%的纯NaOCl进行冲洗。将双冲洗HEDP（9%）添加到溶液中，或不添加作为进一步对照。纯NaOCl溶液导致酰胺III：磷酸盐比率降低，而添加HEDP可抵消这种降低。观察到，所研究的环氧树脂封闭剂的黏附受到根管壁这种NaOCl脱蛋白作用的负面影响，且呈剂量依赖性，而硅酸钙封闭剂的情况则相反。HEDP与NaOCl联合使用对两种封闭剂的黏附都有益。
