Chuliang Tang, KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT, Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, Leuven, Belgium.
Ben Mercelis, KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT, Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, Leuven, Belgium.
Oper Dent. 2024 May 1;49(3):311-324. doi: 10.2341/23-106-L.
To investigate the influence of filler type/loading on the micro-tensile fracture strength (μTFS) of adhesive resins, as measured 'immediately' upon preparation and after 1-week water storage ('water-stored').
The morphology and particle-size distribution of three filler particles, referred to as 'Glass-S' (Esschem Europe), 'BioUnion' (GC), and 'CPC_Mont', were correlatively characterized by SEM, TEM, and particle-size analysis. These filler particles were incorporated into an unfilled adhesive resin ('BZF-29unfilled', GC) in different concentrations to measure the 'immediate' μTFS. After 1-week water storage, the 'water-stored' μTFS of the experimental particle-filled adhesive resins with the most optimum filler loading, specific for each filler type, was measured. In addition, the immediate and water-stored μTFS of the adhesive resins of three experimental two-step universal adhesives based on the same resin matrix but varying for filler type/loading, coded as 'BZF-21' (containing silica and bioglass), 'BZF-29' (containing solely silica), and 'BZF-29_hv' (highly viscous with a higher silica loading than BZF-29), and of the adhesive resins of the gold-standard adhesives OptiBond FL ('Opti-FL', Kerr) and Clearfil SE Bond 2 ('C-SE2', Kuraray Noritake) was measured along with that of BZF-29unfilled (GC) serving as control/reference. Statistics involved one-way and two-way ANOVA followed by post-hoc multiple comparisons (α<0.05).
Glass-S, BioUnion, and CPC_Mont represent irregular fillers with an average particle size of 8.5-9.9 μm. Adding filler to BZF-29unfilled decreased μTFS regardless of filler type/loading. One-week water storage reduced μTFS of all adhesive resins except BZF-21, with the largest reduction in μTFS recorded for BZF-29unfilled. Among the three filler types, the μTFS of the 30 wt% Glass-S and 20 wt% BioUnion filled adhesive resin was not significantly different from the μTFS of BZF-29unfilled upon water storage.
Adding filler particles into adhesive resin did not enhance its micro-tensile fracture strength but appeared to render it less sensitive to water storage as compared to the unfilled adhesive resin investigated.
研究不同类型/载量的填料对即刻和 1 周水储存后（“水储存后”）胶粘剂树脂微拉伸断裂强度（μTFS）的影响。
采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）和粒径分析对三种填料颗粒（分别称为“Glass-S”（Esschem Europe）、“BioUnion”（GC）和“CPC_Mont”）的形态和粒径分布进行了相关特征描述。将这些填料颗粒以不同浓度掺入未填充胶粘剂树脂（GC 的“BZF-29unfilled”）中，以测量“即刻”μTFS。在 1 周水储存后，测量每种填料类型最适填料负载的实验颗粒填充胶粘剂树脂的“水储存后”μTFS。此外，还测量了三种基于相同树脂基质但填料类型/负载不同的两步通用胶粘剂（编码为“BZF-21”（含有二氧化硅和生物玻璃）、“BZF-29”（仅含有二氧化硅）和“BZF-29_hv”（高粘度，比 BZF-29 具有更高的二氧化硅负载）的胶粘剂树脂以及金标准胶粘剂 OptiBond FL（Opti-FL，Kerr）和 Clearfil SE Bond 2（C-SE2，Kuraray Noritake）的胶粘剂树脂的即刻和水储存后 μTFS，同时还测量了 GC 的 BZF-29unfilled 作为对照/参考。统计分析采用单因素和双因素方差分析，然后进行事后多重比较（α<0.05）。
Glass-S、BioUnion 和 CPC_Mont 代表不规则填料，平均粒径为 8.5-9.9 μm。向 BZF-29unfilled 添加填料会降低 μTFS，无论填料类型/负载如何。除 BZF-21 外，1 周水储存降低了所有胶粘剂树脂的 μTFS，BZF-29unfilled 的 μTFS 降幅最大。在三种填料类型中，30wt%Glass-S 和 20wt%BioUnion 填充胶粘剂树脂的 μTFS 在水储存后与 BZF-29unfilled 的 μTFS 无显著差异。
与研究的未填充胶粘剂树脂相比，向胶粘剂树脂中添加填料颗粒并未提高其微拉伸断裂强度，但似乎使其对水储存的敏感性降低。
