Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.
Community Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.
Photodiagnosis Photodyn Ther. 2022 Jun;38:102829. doi: 10.1016/j.pdpdt.2022.102829. Epub 2022 Mar 23.
The present in vitro study was carried out to evaluate the effect of different cavity disinfectants chlorhexidine (CHX), riboflavin (RF), diode laser (DL), carbon dioxide laser (CO), and Propolis on the bond values of resin-modified glass ionomer cement (RMGIC) restoration bonded to caries affected dentin (CAD) MATERIALS AND METHODS: Forty multi-rooted mandibular molars were adapted in self-cure acrylic resin blocks up to the level of the cementoenamel junction so that only the crown portion of the tooth remained visible. Silicon carbide discs of 1200 and 600 grits were then used to remove infected dentin. However, CAD was left behind to use as a substrate for restoration. All samples were randomly divided into five groups based on the method of disinfection. group 1: Propolis, group 2: CHX, group 3:RF activated by PDT, group 4: CO laser, and group 5: DL. RMGIC restoration was then placed on these disinfected samples. Samples were kept in an incubator keeping humidity at 100 % and temperature at 37 °C for about 24 hrs. All samples were then placed in a Universal testing machine to measure SBS. Failure modes were identified using a stereomicroscope. ANOVA test was used to analyze intergroup comparison. Tukey HSD test was used to evaluate multiple group comparisons. The level of significance was set at a p < 0.05 value.
Group 2 specimens disinfected with CHX established the highest SBS value (17.85±1.09 MPa). Whereas, Group 5 specimens in which CAD was disinfected with DL demonstrated the lowest SBS (10.36±0.33MPa).
CO has the potential to be used as an alternate to CHX for caries-eaffected dentin disinfection. However, Riboflavin activated by photodynamic therapy; Diode laser, and Propolis as cavity disinfectant prior bond to resin-modified glass ionomer is not recommended and needs further probing.
本体外研究旨在评估不同腔消毒剂洗必泰（CHX）、核黄素（RF）、二极管激光（DL）、二氧化碳激光（CO）和蜂胶对黏结于龋损牙本质（CAD）的树脂改良型玻璃离子水门汀（RMGIC）修复体黏结强度的影响。
将 40 颗多根下颌磨牙适配于自固化丙烯酸树脂块中，直至牙釉质牙骨质交界处，使牙齿的冠部仅可见。然后使用 1200 和 600 粒度的碳化硅片去除感染的牙本质。然而，CAD 被保留下来用作修复的基底。所有样本根据消毒方法随机分为五组。第 1 组：蜂胶，第 2 组：CHX，第 3 组：PDT 激活的 RF，第 4 组：CO 激光，第 5 组：DL。然后将 RMGIC 修复体放置在这些消毒样本上。将样本保存在孵育箱中，保持湿度为 100%，温度为 37°C，约 24 小时。然后将所有样本放入万能试验机中测量 SBS。使用立体显微镜识别失效模式。使用 ANOVA 检验进行组间比较分析。使用 Tukey HSD 检验评估多组比较。显著性水平设定为 p < 0.05。
用 CHX 消毒的第 2 组标本建立了最高的 SBS 值（17.85±1.09 MPa）。而用 DL 消毒 CAD 的第 5 组标本则显示出最低的 SBS（10.36±0.33 MPa）。
CO 有潜力替代 CHX 用于龋坏牙本质的消毒。然而，光动力疗法激活的核黄素；二极管激光和蜂胶作为黏结前的腔消毒剂不推荐使用，需要进一步探究。
