Boppré Letícia Mendes, Menezes Savaris Julia, Catherine Maiola Emanuelle, Peressoni Vieira-Schuldt Daniela, da Fonseca Roberti Garcia Lucas, da Silveira Teixeira Cleonice, Antunes Bortoluzzi Eduardo
Department of Dentistry-Endodontics Division, Health Sciences Center, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
Department of Endodontics, College of Dental Medicine, Nova Southeastern University, Fort Lauderdale, FL, USA.
Int J Dent. 2024 Jan 6;2024:6612675. doi: 10.1155/2024/6612675. eCollection 2024.
The present study aimed to investigate the capacity of different irrigation protocols using heated distilled water at 65°C (HDW), in preventing the formation of the brown-orange precipitate observed after the interaction between sodium hypochlorite (NaOCl) and chlorhexidine (CHX).
Forty human canines were selected, prepared, and cleaved in two halves. Images of delimited areas in each root canal thirds were obtained through a stereomicroscope (16x and 40x). After reassembly, the teeth were distributed into four groups ( = 10) according to the final irrigation protocol: G1 (no HDW): EDTA + NaOCl + CHX with conventional irrigation (CI); G2 (HDW + CI): EDTA with passive ultrasonic irrigation (PUI) + NaOCl (PUI) + HDW (CI) + CHX (PUI); G3 (HDW + PUI): EDTA + NaOCl + HDW + CHX with PUI; G4 (HDW + CUI): EDTA (PUI) + NaOCl (PUI) + HDW with continuous ultrasonic irrigation (CUI) + CHX (PUI). After irrigation, the teeth were re-separated and images of the same delimited areas were obtained again. Scores were assigned according to the amount of precipitate observed, comparing the initial and final images. The data were submitted to Kruskal-Wallis, Dunn and Friedman statistical tests ( = 5%).
G1(no HDW) showed the highest scores in the analysis between groups ( < 0.001), with a greater amount of precipitate in the cervical and medium thirds ( < 0.001). The thirds of the other experimental groups did not differ from each other ( > 0.05).
The intermediate irrigation with heated distilled water at 65°C prevented the formation of brown-orange precipitate, regardless of the use of ultrasonic activation (PUI or CUI).
本研究旨在探究使用65°C的热蒸馏水(HDW)的不同冲洗方案,在防止次氯酸钠(NaOCl)与氯己定(CHX)相互作用后观察到的棕橙色沉淀形成方面的能力。
选取40颗人犬齿,进行制备并纵劈为两半。通过体视显微镜(16倍和40倍)获取每个根管三分之一区域内划定区域的图像。重新组装后,根据最终冲洗方案将牙齿分为四组(每组 = 10颗):G1(无HDW):乙二胺四乙酸(EDTA)+ NaOCl + CHX,采用传统冲洗(CI);G2(HDW + CI):EDTA采用被动超声冲洗(PUI)+ NaOCl(PUI)+ HDW(CI)+ CHX(PUI);G3(HDW + PUI):EDTA + NaOCl + HDW + CHX,采用PUI;G4(HDW + CUI):EDTA(PUI)+ NaOCl(PUI)+ HDW,采用连续超声冲洗(CUI)+ CHX(PUI)。冲洗后,将牙齿重新分开,再次获取相同划定区域的图像。根据观察到的沉淀量进行评分,比较初始图像和最终图像。数据进行Kruskal-Wallis、Dunn和Friedman统计检验(α = 5%)。
G1(无HDW)在组间分析中得分最高(P < 0.001),在颈部和中部三分之一处沉淀量更多(P < 0.001)。其他实验组的三分之一区域之间无差异(P > 0.05)。
65°C的热蒸馏水进行中间冲洗可防止棕橙色沉淀形成,无论是否使用超声激活(PUI或CUI)。