Department of Restorative Dentistry, Faculty of Dentistry, Süleyman Demirel University, Isparta, Turkey.
Aust Dent J. 2020 Sep;65(3):181-188. doi: 10.1111/adj.12744. Epub 2020 Jan 22.
This study aimed to evaluate the effect of double application of universal adhesives on bond strength to dentine after ionizing radiation.
One hundred and forty caries-free human third molars were used. Half of the teeth were irradiated (IR) (70.2 Gy). The IR and non-IR teeth were assigned into seven groups (n = 10). Universal adhesives Single Bond Universal (3M Oral Care), Gluma Bond Universal (Heraeus Kulzer) and Prime&Bond Elect (Dentsply) were employed (following manufacturer's instructions and double application). Two-step self-etch adhesive Clearfil SE Bond (Kuraray Noritake) was used as control. After composite build-ups were bonded to mid-coronal occlusal dentine surfaces, the specimens were stored in water (37°C/24 h) and sectioned into microspecimens. The specimens were subjected to μTBS testing (1.0 mm/min). Failure analysis was performed using stereomicroscope and scanning electron microscopy. Data were analysed with two-way ANOVA and Tukey's test (P = 0.05).
The radiotherapy caused reduction in the bond strength of universal adhesives when the adhesives were used with single application after radiotherapy (P < 0.05). The double application resulted in increased bond strength of the universal adhesives to IR dentine (P < 0.05).
The double application was beneficial in improving the dentine bond strength of universal adhesives affected by radiotherapy after ionizing radiation.
本研究旨在评估电离辐射后通用粘结剂的双次应用对牙本质粘结强度的影响。
使用 140 颗无龋第三磨牙。将一半的牙齿进行照射（IR）（70.2 Gy）。IR 和非 IR 牙齿被分为七组（n = 10）。使用通用粘结剂 Single Bond Universal（3M Oral Care）、Gluma Bond Universal（Heraeus Kulzer）和 Prime&Bond Elect（Dentsply）（按照制造商的说明和双次应用）。两步自酸蚀粘结剂 Clearfil SE Bond（Kuraray Noritake）作为对照。将复合修复体粘结到中冠颌面牙本质表面后，将标本储存在水中（37°C/24 h）并切成微标本。使用微拉伸试验（1.0 mm/min）对标本进行测试。使用立体显微镜和扫描电子显微镜进行失效分析。使用双向方差分析和 Tukey 检验（P = 0.05）对数据进行分析。
放射治疗后，通用粘结剂单次应用时，放射治疗会降低通用粘结剂的粘结强度（P < 0.05）。双次应用导致通用粘结剂对 IR 牙本质的粘结强度增加（P < 0.05）。
双次应用有利于提高电离辐射后受放射治疗影响的通用粘结剂的牙本质粘结强度。
