Aldosari Mohammed M, Al-Sehaibany Fares S
Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia.
Materials (Basel). 2022 Jun 23;15(13):4424. doi: 10.3390/ma15134424.
The aim of this study was to evaluate the effect of immediate versus delayed loading times on the microtensile bond strength (μTBS) of restorative materials, including resin-based composite (RBC), resin-modified glass ionomer cement (RMGIC) and glass ionomer cement (GIC), that were bonded to silver diamine fluoride (SDF)-treated demineralized dentin. Ninety caries-free extracted premolar teeth were assigned to three groups ( = 30) loaded with RBC, RMGIC and GIC restorative materials. Each group was further divided into three subgroups ( = 10): subgroup A (control specimens), immediate loading of the restorative material on sound dentin; subgroup B, demineralized dentin, SDF treatment and immediate loading of the restorative material; and subgroup C, demineralized dentin, SDF treatment and restorative material loading a week later. One-way ANOVA and Tukey's post-hoc tests were performed to compare the μTBS values. The RBC exhibited the highest µTBS, followed by RMGIC and GIC. Multiple comparisons showed an increase in the µTBS in the delayed loading groups irrespective of the restorative material used. The majority of the failure modes were adhesive. Delayed loading of RMGIC for 1 week after SDF application showed significantly higher µTBS than that of immediate loading.
本研究的目的是评估即刻加载与延迟加载时间对粘结至经氟化亚银（SDF）处理的脱矿牙本质的修复材料（包括树脂基复合材料（RBC）、树脂改性玻璃离子水门汀（RMGIC）和玻璃离子水门汀（GIC））微拉伸粘结强度（μTBS）的影响。将90颗无龋的拔除前磨牙分为三组（每组n = 30），分别用RBC、RMGIC和GIC修复材料进行加载。每组进一步分为三个亚组（每组n = 10）：亚组A（对照样本），在完好牙本质上即刻加载修复材料；亚组B，脱矿牙本质，SDF处理并即刻加载修复材料；亚组C，脱矿牙本质，SDF处理并在一周后加载修复材料。采用单因素方差分析和Tukey事后检验比较μTBS值。RBC表现出最高的μTBS，其次是RMGIC和GIC。多重比较显示，无论使用何种修复材料，延迟加载组的μTBS均有所增加。大多数失败模式为粘结性。SDF应用后1周延迟加载RMGIC的μTBS显著高于即刻加载。
