Qaiser Shazeena, Hegde Mithra N, Devadiga Darshana, Yelapure Mahalaxmi
Department of Conservative Dentistry & Endodontics, A B Shetty Memorial Institute of Dental Sciences.
J Dent Res Dent Clin Dent Prospects. 2020 Spring;14(2):117-123. doi: 10.34172/joddd.2020.025. Epub 2020 Jun 17.
Bioceramics need to interact chemically with dentin to exhibit adequate bioactivity. Proper bonding of bioceramics with dentin is of considerable importance. This study aimed to evaluate the wettability and marginal adaptation of bioceramics after the use of surface-active agents on dentin: %0.5 cetrimide and %1 alkylbenzene sulfonate. Of ninety maxillary central incisors, 45 teeth were sectioned longitudinally with 45 root halves randomly assigned to three groups (n=15): group I: no pre-treatment; group II: %0.5 cetrimide; group III: %1 alkylbenzene sulfonate. Then, the samples were subdivided into three subgroups (n=5): subgroup I: MTA; subgroup II: Biodentine, and subgroup III: BioRoot. A controlled-volume droplet of bioceramic material was placed on each root half, which was positioned in a dynamic contact angle analyzer to record the static contact angle for wettability. The remaining 45 samples were decoronated; the root canals were prepared and randomly categorized, as mentioned above. The root canal surfaces were treated, filled with the bioceramic material, transversely sectioned, and then each middle section was analyzed microscopically for marginal adaptation. Statistical tests used included post hoc Tukey tests and one-way ANOVA. The level of statistical significance set at %95 (P<0.05). The contact angle values and interfacial gap width values after surface pre-treatment were significantly lower when compared to no pre-treatment group (P<0.05). The values were significant for %0.5 cetrimide in the case of Biodentine and %1 alkylbenzene sulfonate in the case of BioRoot (P<0.05). The two surfactants yielded promising results for enhancing the wettability and marginal adaptation of materials to the root dentin, which is required for obtaining an adequate seal, penetration, and bond strength of bioceramics.
生物陶瓷需要与牙本质进行化学相互作用以展现出足够的生物活性。生物陶瓷与牙本质的良好结合具有相当重要的意义。本研究旨在评估在牙本质上使用表面活性剂（0.5%的西曲溴铵和1%的烷基苯磺酸盐）后生物陶瓷的润湿性和边缘适应性。在90颗上颌中切牙中，45颗牙齿被纵向切开，45个牙根半随机分为三组（n = 15）：第一组：不进行预处理；第二组：0.5%的西曲溴铵；第三组：1%的烷基苯磺酸盐。然后，将样本再细分为三个亚组（n = 5）：亚组I：MTA；亚组II：生物活性玻璃离子水门汀；亚组III：生物根充材料。将一滴定量的生物陶瓷材料放置在每个牙根半上，将其置于动态接触角分析仪中以记录润湿性的静态接触角。其余45个样本进行去冠处理；按照上述方法制备根管并随机分类。对根管表面进行处理，用生物陶瓷材料填充，横向切片，然后对每个中间切片进行显微镜下的边缘适应性分析。使用的统计检验包括事后Tukey检验和单因素方差分析。统计学显著性水平设定为95%（P < 0.05）。与未预处理组相比，表面预处理后的接触角值和界面间隙宽度值显著更低（P < 0.05）。对于生物活性玻璃离子水门汀，0.5%的西曲溴铵的值具有显著性；对于生物根充材料，1%的烷基苯磺酸盐的值具有显著性（P < 0.05）。这两种表面活性剂在提高材料对牙根牙本质的润湿性和边缘适应性方面产生了有前景的结果，而这对于获得生物陶瓷足够的封闭性、渗透性和粘结强度是必需的。
