Study of the adhesion of microhybrid and nanohybrid diacrylic composite resins to dental hard tissues

Q4 Dentistry
B. Gălbinașu, Vlad-Cristian Grigore, A. Ghita, I. Pătrașcu
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引用次数: 0

Abstract

Objective. The aim of the present study is to compare the adhesive capacity of the microhybrid and nanohybrid diacrylic composite resins to enamel, dentin and cement. Materials and method. Standardized cavities were made at the cervical level on the vestibular surfaces of 8 maxillary third molars without caries or fractures. The cavities were filled with microhybrid (Filtek Z250 – 3M ESPE), respectively nanohybrid composites (Filtek Z550 – 3M ESPE), half of the teeth also receiving an intermediate layer of flowable composite (Gradia Direct LoFlo – GC). All of them were subjected to a thermocycling process (300 cycles in water of 5°C/55°C). After the isolation of the teeth with nail polish, they were introduced into 1% methylene blue for 24 hours. Subsequently, they were embedded in an epoxy resin (EpoThinTM 2 – Buehler), polished and sectioned mesio-distally with Beta Grinder/Polisher-Buehler. Sections were selected where the greatest degree of methylene blue penetration was detected to be analyzed by optical polarized light microscopy (Axio Imager A1m – Zeiss). Results. All teeth showed microinfiltration of the cement, while only half showed it also in enamel. There are no microinfiltration differences between microand nanohybrid composite resins. The intermediate layer of flowable composite does not influence microinfiltration.
微杂化和纳米杂化二丙烯酸复合树脂与牙硬组织的黏附研究
客观的本研究的目的是比较微杂化和纳米杂化二丙烯酸酯复合树脂对牙釉质、牙本质和水泥的粘附能力。材料和方法。在没有龋齿或骨折的8颗上颌第三磨牙的前庭表面上,在颈部水平上制作了标准化的龋齿。空腔填充有微杂化材料(Filtek Z250–3M ESPE)和纳米杂化复合材料(Filtec Z550–3M ESP),一半的牙齿还接受可流动复合材料的中间层(Gradia Direct LoFlo–GC)。所有这些都经过了热循环过程(在5°C/55°C的水中进行300次循环)。在用指甲油分离牙齿后,将它们引入1%亚甲蓝中24小时。随后,将它们嵌入环氧树脂(EpoThinTM 2–Buehler)中,用Beta Grinder/Polisher-Buehler进行抛光和近端切片。选择检测到亚甲基蓝渗透程度最大的切片,通过光学偏振光显微镜(Axio Imager A1m–Zeiss)进行分析。后果所有牙齿都显示出水泥的微过滤,而只有一半的牙齿在牙釉质中也显示出这种情况。微米和纳米杂化复合树脂之间没有微过滤差异。可流动复合材料的中间层不影响微过滤。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
0.10
自引率
0.00%
发文量
21
审稿时长
4 weeks
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