Sheikh Hasani Yasmin, Paryab Mehrsa, Saffarpour Aida, Kharazifard Mohammad Javad, Shahrabi Mehdi
Dept. of Pediatric Dentistry, International Campus, Tehran University of Medical Sciences, Tehran, Iran.
Dept. of Restorative Dentistry, International Campus, Tehran University of Medical Sciences, Tehran, Iran.
J Dent (Shiraz). 2017 Dec;18(4):265-271.
There are some concerns regarding the effect of chlorhexidine (CHX) applied for cavity disinfection on the bond strength of adhesive restorations to dentin.
This study sought to assess the effect of CHX on the shear bond strength (SBS) of Equia resin-modified glass ionomer cement (RMGIC) to dentin in permanent teeth.
In this experimental study, the buccal surface of 84 freshly extracted human premolars was ground to expose the flat dentin. The samples were randomly assigned to four groups (n=21). The steps were as following in the group I: conditioning, Equia RMGIC, 500 thermal cycles; group I: conditioning, Equia RMGIC, 6000 thermal cycles; group II: conditioning, CHX, Equia RMGIC, 500 thermal cycles, and group II: conditioning, CHX, Equia RMGIC, and 6000 thermal cycles. Twenty samples from each group were subjected to SBS test and one sample was inspected under a scanning electron microscope. Data were analyzed using two-way ANOVA and t-test.
The SBS was significantly different among the groups (= 0.007). The groups subjected to 500 thermal cycles showed significantly higher SBS to dentin when they were treated with CHX (= 0.000). There was no significant difference between samples thermocycled for 6000 cycles with and without application of CHX (= 0.269). The SBS in the groups that were thermocycled for 6000 cycles (I and II) was lower than those thermocycled for 500 cycles (I and II). This difference between II and II was statistically significant (= 0.007).
Chlorhexidine can positively affect the short term SBS of Equia RMGIC to dentin.
对于用于窝洞消毒的氯己定（CHX）对粘结修复材料与牙本质粘结强度的影响存在一些担忧。
本研究旨在评估CHX对恒牙中Equia树脂改性玻璃离子水门汀（RMGIC）与牙本质的剪切粘结强度（SBS）的影响。
在本实验研究中，将84颗新鲜拔除的人类前磨牙的颊面磨平以暴露平坦的牙本质。将样本随机分为四组（n = 21）。第一组的步骤如下：预处理、Equia RMGIC、500次热循环；第一组：预处理、Equia RMGIC、6000次热循环；第二组：预处理、CHX、Equia RMGIC、500次热循环，以及第二组：预处理、CHX、Equia RMGIC和6000次热循环。每组20个样本进行SBS测试，1个样本在扫描电子显微镜下检查。使用双向方差分析和t检验分析数据。
各组之间的SBS有显著差异（P = 0.007）。接受500次热循环的组在用CHX处理时对牙本质的SBS显著更高（P = 0.000）。在进行6000次循环热循环的样本中，使用和不使用CHX之间没有显著差异（P = 0.269）。进行6000次循环热循环的组（I和II）中的SBS低于进行500次循环热循环的组（I和II）。II组和II组之间的这种差异具有统计学意义（P = 0.007）。
氯己定可对Equia RMGIC与牙本质的短期SBS产生积极影响。
