Department of Prosthodontics, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China; Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.
Clinic of Fixed Prosthodontics, Nagasaki University Hospital, Nagasaki, Japan.
J Prosthodont Res. 2019 Jul;63(3):340-346. doi: 10.1016/j.jpor.2019.01.008. Epub 2019 Feb 19.
This study aimed to evaluate the effects of chemical conditioning and self-adhesive resins (SARs) on the bonding of mechanically conditioned high-strength composite resin block (HSCRB).
Eighteen sections of HSCRB (KZR-CAD HR 3 Gammatheta, Yamakin) were treated with alumina air abrasion and randomly divided into 3 groups according to the SARs for bonding: RelyX Unicem 2 (RXU), SA Luting Plus (SAL), and G-Cem ONE (GCO). The sections were further divided into 3 subgroups according to the chemical conditioning of the adherend surfaces: no conditioning (C), universal adhesive (UA), and a mixture of γ-MPTS and 10-MDP (MM). After the surface conditioning, the sections were cemented with the SARs. Each cemented section was cut into 40 beams. Half of the beams were thermocycled (4°C/60°C, 10,000 cycles). The micro-tensile bond strength (μTBS) values were measured using a universal testing machine. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), contact angles, and surface roughness measurements were performed on the adherend surfaces of each subgroup.
RXU showed the highest μTBS values among the 3 SARs tested, while MM application exhibited the highest μTBS values among the 3 chemical conditioning methods tested. After thermocycling, the samples in the RXU/MM, RXU/UA, and GCO/MM groups showed no significant changes in the μTBS values, whereas the others showed a significant reduction.
The bond strength of HSCRB was influenced by the chemical conditioning, SARs, and aging. γ-MPTS and 10-MDP application yielded higher μTBS values of mechanically treated HSCRB than the UA.
本研究旨在评估化学处理和自粘树脂（SARs）对机械处理高强度复合树脂块（HSCRB）的粘结效果。
将 18 个 HSCRB （KZR-CAD HR 3 Gammatheta，Yamakin）进行氧化铝喷砂处理，并根据用于粘结的 SARs 随机分为 3 组：RelyX Unicem 2（RXU）、SA Luting Plus（SAL）和 G-Cem ONE（GCO）。这些部分进一步根据粘结面的化学处理分为 3 个亚组：无处理（C）、通用粘结剂（UA）和γ-MPTS 和 10-MDP 的混合物（MM）。表面处理后，将各部分用 SAR 粘结。每个粘结部分均被切割成 40 个梁。将一半梁进行热循环（4°C/60°C，10000 次）。使用万能试验机测量微拉伸粘结强度（μTBS）值。对每个亚组的粘结面进行扫描电子显微镜（SEM）、能谱（EDS）、接触角和表面粗糙度测量。
在所测试的 3 种 SAR 中，RXU 显示出最高的 μTBS 值，而在 3 种化学处理方法中，MM 应用显示出最高的 μTBS 值。热循环后，RXU/MM、RXU/UA 和 GCO/MM 组的样品 μTBS 值无显著变化，而其他组的样品则显著降低。
HSCRB 的粘结强度受化学处理、SARs 和老化的影响。γ-MPTS 和 10-MDP 的应用可提高机械处理后的 HSCRB 的 μTBS 值，优于 UA。
