Effect of calcium hypochlorite and sodium thiosulfate on the bond strength to pulp chamber dentin: A laboratory investigation

IF 1.8 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

European Journal of Oral Sciences Pub Date : 2023-06-01 DOI:10.1111/eos.12938

Guilherme Pauletto, Israel Bangel Carlotto, Lucas Saldanha da Rosa, Natália de Freitas Daudt, Gabriel Kalil Rocha Pereira, Carlos Alexandre Souza Bier

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引用次数: 1

Abstract

This study aimed to compare the effect of sodium hypochlorite (NaOCl) and calcium hypochlorite [Ca(OCl)₂] on the bond strength to pulp chamber dentin when followed or not by the use of sodium thiosulfate (Na₂S₂O₃). The pulp chamber of fifty human molars were divided into five groups (n = 10) according to the immersion protocol: 2.5% NaOCl; 2.5% NaOCl + 5% Na₂S₂O₃; 2.5% Ca(OCl)₂; 2.5% Ca(OCl)₂ + 5% Na₂S₂O₃; and 0.9% sodium chloride (NaCl; control). Subsequently, the samples were restored with resin composite. Three sticks each were obtained and subjected to microtensile testing. SEM/EDS analyses of the pulp chamber roof (n = 8) were carried out for mineral quantification. Elemental analysis data were investigated via one-way ANOVA and Tukey's post hoc, and bond strength data by post hoc pairwise comparisons using the Kruskal–Wallis test. Use of 2.5% NaOCl was associated with the lowest value of bond strength, while 2.5% Ca(OCl)₂ had similar bond strength to that of the 0.9% NaCl control. Using 5% Na₂S₂O₃ was able to increase the bond strength after 2.5% NaOCl, but not after 2.5% Ca(OCl)₂. The group treated only with 2.5% Ca(OCl)₂ had a higher Ca/P ratio on the dentin surface. Dentin treated with Ca(OCl)₂ was not affected by Na₂S₂O₃ and showed bond strength similar to the 0.9% NaCl.

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次氯酸钙和硫代硫酸钠对牙本质与牙本质结合强度的影响:实验室研究

本研究旨在比较次氯酸钠(NaOCl)和次氯酸钙[Ca(OCl)2]在不使用硫代硫酸钠(Na2S2O3)的情况下对牙本质黏结强度的影响。将50颗人磨牙牙髓腔按浸泡方案分为5组(n = 10): 2.5% NaOCl;2.5% NaOCl + 5% Na2S2O3;Ca (OCl) 2 2.5%;2.5% Ca(OCl)2 + 5% Na2S2O3;0.9%氯化钠(NaCl;控制)。随后，用树脂复合材料对样品进行修复。分别取三根棒材进行微拉伸试验。对矿浆室顶板(n = 8)进行了SEM/EDS分析，以进行矿物定量分析。元素分析数据采用单因素方差分析和Tukey事后分析，结合强度数据采用事后两两比较，采用Kruskal-Wallis检验。2.5% NaOCl用量与最低的结合强度有关，2.5% Ca(OCl)2用量与0.9% NaCl用量的结合强度相近。添加5% Na2S2O3可以提高2.5% NaOCl后的结合强度，而2.5% Ca(OCl)2后则不能。2.5% Ca(OCl)2处理组牙本质表面Ca/P比值较高。Ca(OCl)2处理的牙本质不受Na2S2O3的影响，其结合强度与0.9% NaCl处理的牙本质相似。

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来源期刊

European Journal of Oral Sciences 医学-牙科与口腔外科

CiteScore

3.50

自引率

5.30%

发文量

审稿时长

2 months

期刊介绍： The European Journal of Oral Sciences is an international journal which publishes original research papers within clinical dentistry, on all basic science aspects of structure, chemistry, developmental biology, physiology and pathology of relevant tissues, as well as on microbiology, biomaterials and the behavioural sciences as they relate to dentistry. In general, analytical studies are preferred to descriptive ones. Reviews, Short Communications and Letters to the Editor will also be considered for publication. The journal is published bimonthly.