Abdelshafi Mostafa A, Soliman Hanan A N, Abdelaziz Dina
Dental Biomaterials Dep, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
Conservative Dentistry Dep, Faculty of Dentistry, Kafrelsheikh University, Kafrelsheikh, Egypt.
BMC Oral Health. 2025 Jul 17;25(1):1193. doi: 10.1186/s12903-025-06552-8.
This study aimed to assess the impact of 38% silver diamine fluoride (SDF) treatment regarding microtensile bond strength of three bioactive restorative materials to artificially induced caries-affected dentine after thermocycling; Alkasite restorative material, Glass hybrid restorative (GHR) and Resin modified glass ionomer (RMGI).
A total of 60 artificially demineralized human mid-coronal dentine specimens were randomly allocated into two main groups (n = 30 each): a control group and an SDF-treated group (38% SDF). Each group was additionally split into three subgroups (n = 10) regarding the type of restorative material (Alkasite; Cention N, GHR; EQUIA Forte fil, RMGIC; Fuji II LC). 10,000 cycles of thermal cycling were conducted alternating between 5 ºC - 55 ºC with a dwell-duration of 15 s. µTBS was assessed with the aid of a universal testing machine (Instron Co., Canton, MA-USA) occupied with a 50 kg load cell, operating at 0.5 mm/min cross-head speed till failure. µTBS results, measured in MPa, were collected and statistically analyzed with two- and one-way ANOVA succeeded by Tukey's post hoc test and student's t-test (α = 0.05).
There was a significant reduction in µTBS after SDF application in all tested groups (p ≤ 0.05). Cention N recorded the highest bond strength values in both control and SDF-treated conditions, while EQUIA Forte Fil had the lowest.
Based on the limitations of this laboratory study, the application of 38% SDF directly preceding restoration with Alkasite, GHR or RMGI resulted in a significant deterioration in bond strength to artificially induced caries-affected dentine.
本研究旨在评估38%氟化银胺（SDF）处理对三种生物活性修复材料与热循环后人工诱导的龋损牙本质之间微拉伸粘结强度的影响；Alkasite修复材料、玻璃混合修复材料（GHR）和树脂改性玻璃离子水门汀（RMGI）。
总共60个人工脱矿的人类中冠牙本质标本被随机分为两个主要组（每组n = 30）：对照组和SDF处理组（38% SDF）。根据修复材料的类型（Alkasite；Cention N、GHR；EQUIA Forte fil、RMGI C；Fuji II LC），每组再分为三个亚组（n = 10）。进行10000次热循环，在5℃ - 55℃之间交替，保压时间为15秒。借助配备50 kg测力传感器的万能试验机（美国马萨诸塞州坎顿市英斯特朗公司）评估微拉伸粘结强度（µTBS），以0.5 mm/min的十字头速度运行直至破坏。收集以MPa为单位测量的µTBS结果，并通过双因素和单因素方差分析进行统计分析，随后进行Tukey事后检验和学生t检验（α = 0.05）。
在所有测试组中，应用SDF后µTBS均显著降低（p≤0.05）。Cention N在对照和SDF处理条件下均记录到最高的粘结强度值，而EQUIA Forte Fil的粘结强度值最低。
基于本实验室研究的局限性，在使用Alkasite、GHR或RMGI进行修复之前直接应用38% SDF会导致与人工诱导的龋损牙本质的粘结强度显著降低。
