Department of Prosthetic Dentistry and Dental Material Science, Leipzig University, Germany; Department of Prosthetic Dentistry, Faculty of Medicine, Medical Center, Center for Dental Medicine, University of Freiburg, Germany.
Department of Prosthetic Dentistry and Dental Material Science, Leipzig University, Germany.
Dent Mater. 2022 Aug;38(8):1376-1384. doi: 10.1016/j.dental.2022.06.013. Epub 2022 Jun 27.
When consumed in excess, acidic foods and beverages can cause dental erosions leading to irreversible loss of tooth substance. In many cases, prosthetic rehabilitation of the damaged teeth is mandatory. The aim of this in vitro study was to investigate, for the first time on this scale, the resistance of various commonly used self-adhesive resin luting cements (Bifix SE, VOCO; G-Cem LinkAce, GC; RelyX Unicem, 3 M Oral Care; SpeedCEM Plus, Ivoclar ) against acidic media, and to find out whether they can withstand long-term exposure. These results were compared with an adhesive resin luting cement (Panavia V5, Kuraray) that functioned as reference gold standard. Furthermore we applied area roughness parameters for surface texture analysis in the present investigation, to highlight their advantages for investigations on the surface quality of resin luting cements.
Six specimens with identical diameter (10 mm) and thickness (3 mm) were prepared from each self-adhesive and adhesive resin luting cement and forwarded to an incubation in various acidic media for a period of 232 h. Conductivity and pH-values of each acidic medium was analyzed for each material group prior (t 0) and after exposure (t 1). The specimens were examined for Vickers microhardness and surface quality. For the evaluation of surface roughness, the parameters Sa, Sdr, Spc Spk, Sk, and Svk were investigated by using different filtered surfaces (S-L; S-F) according to ISO 25 178. Statistical analysis was conducted at a significance level of α = 0.050.
For the evaluation of the acid resistance of self-adhesive resin luting cements investigations on conductivity and pH-value assessment of storage solution appear unsuitable, while the assessment of microhardness and surface analysis revealed valid data. It could be shown that changes in surface texture of the resin luting cements can be determinend in qualitative and quantitative manner. While the microhardness and surface quality of some resin luting cements hardly changed, others showed significantly reduced values in microhardness and changes in their surface quality (p < 0.001).
The data of the current study emphasize the relevance of interactions between resin luting cements and acids and suggest further laboratory and clinical studies to elucidate its impact on the clinical performance of the materials investigated.
酸性食物和饮料如果摄入过量，可能会导致牙齿侵蚀，从而导致不可逆转的牙体丧失。在许多情况下，受损牙齿需要进行修复。本体外研究的目的在于首次大规模调查各种常用自粘结树脂水门汀（Bifix SE、VOCO；G-Cem LinkAce、GC；RelyX Unicem、3M 口腔护理；SpeedCEM Plus、Ivoclar）对酸性介质的抵抗力，并确定它们是否能长期耐受。这些结果与作为参考金标准的粘结树脂水门汀（Panavia V5、Kuraray）进行了比较。此外，我们在本次研究中应用了表面粗糙度参数来进行表面纹理分析，以突出它们在树脂水门汀表面质量研究中的优势。
从每种自粘结和粘结树脂水门汀中制备 6 个具有相同直径（10mm）和厚度（3mm）的样本，并将其置于不同的酸性介质中孵育 232h。在每个材料组中，在暴露前（t0）和暴露后（t1）分析每种酸性介质的电导率和 pH 值。对试件的维氏显微硬度和表面质量进行检测。为了评估表面粗糙度，根据 ISO 25178 使用不同的过滤表面（S-L；S-F）对 Sa、Sdr、Spc Spk、Sk 和 Svk 等参数进行了研究。统计分析的显著性水平设为α=0.050。
对于自粘结树脂水门汀的耐酸性评估，储存溶液的电导率和 pH 值评估似乎不合适，而显微硬度和表面分析的评估则提供了有效的数据。结果表明，可以以定性和定量的方式确定树脂水门汀表面纹理的变化。虽然一些树脂水门汀的显微硬度和表面质量几乎没有变化，但其他树脂水门汀的显微硬度显著降低，表面质量也发生了变化（p<0.001）。
本研究的数据强调了树脂水门汀与酸之间相互作用的重要性，并建议进一步进行实验室和临床研究，以阐明其对所研究材料临床性能的影响。
