Upadhyaya Viram, Arora Aman, Singhal Jagriti, Kapur Smriti, Sehgal Monika
Department of Prosthodontics, DAV (C) Dental College, Yamuna Nagar, Haryana, India.
J Indian Prosthodont Soc. 2019 Jul-Sep;19(3):240-247. doi: 10.4103/jips.jips_161_19.
This study aims to evaluate and compare the shear bond strength (SBS) of three different resin cements - total etch and rinse, self-etch and self-adhesive resin cements, used to bond the lithium disilicate restorations to human dentin.
Comparative - study design.
Forty-five lithium disilicate (IPS E.max) discs (4 mm in diameter and 3 mm thick) were fabricated and randomly divided into three groups ( = 15). The occlusal surfaces of 45 extracted human maxillary premolars were ground flat. Fifteen specimens were luted, under a constant load, with each of the following resin cement: Variolink N (Group VN), Multilink N (Group MN), and Multilink Speed (Group MS). All cemented specimens were stored in distilled water for 1-week following which, they were tested under shear loading at a constant crosshead speed of 1 mm/min until fracture on a universal testing machine; the load at fracture was reported in megapascals (MPa) as the bond strength. Fractured specimens were also inspected by the scanning electron microscopy. Statistical analysis of the collected data was performed using one-way ANOVA test, Bonferroni test, and Chi-square test (α =0.05).
Oneway ANOVA test and Bonferroni test.
Mean SBS data of the groups in MPa were: Variolink N (Group VN): 14.19 ± 0.76; Multilink N (Group MN): 10.702 ± 0.75; and Multilink Speed (Group MS): 5.462 ± 0.66. Significant differences in SBS ( < 0.001) of the three resin cement were found. Intergroup comparison revealed statistically significant differences in SBS between Groups VN and MN ( < 0.001), Groups B and C ( < 0.001), and Groups VN and MS ( < 0.001). Chi-square test used to compare the distribution of mode of bond failure among the three groups delineated that the cohesive failure was significantly more among Group VN, whereas adhesive failure was significantly more among Group MN and MS.
Total etch and rinse resin cement, i.e., Variolink N (Group VN) produced significantly higher bond strength of all-ceramics to dentin surfaces than did the self-etch and self-adhesive resin cements, i.e., Multilink N and Multilink Speed, respectively.
本研究旨在评估和比较三种不同的树脂水门汀——全酸蚀冲洗型、自酸蚀型和自粘接型树脂水门汀，用于将二硅酸锂修复体粘结至人牙本质的剪切粘结强度（SBS）。
对比研究设计。
制作45个二硅酸锂（IPS E.max）圆盘（直径4mm，厚3mm），随机分为三组（每组n = 15）。将45颗拔除的人类上颌前磨牙的咬合面磨平。分别用以下树脂水门汀在恒定载荷下粘结15个样本：Variolink N（VN组）、Multilink N（MN组）和Multilink Speed（MS组）。所有粘结后的样本在蒸馏水中保存1周，之后在万能试验机上以1mm/min的恒定十字头速度进行剪切加载测试直至断裂；断裂时的载荷以兆帕（MPa）为单位报告为粘结强度。断裂的样本也通过扫描电子显微镜进行检查。使用单向方差分析、Bonferroni检验和卡方检验（α = 0.05）对收集的数据进行统计分析。
单向方差分析和Bonferroni检验。
各组以MPa为单位的平均SBS数据为：Variolink N（VN组）：14.19 ± 0.76；Multilink N（MN组）：10.702 ± 0.75；Multilink Speed（MS组）：5.462 ± 0.66。发现三种树脂水门汀的SBS存在显著差异（P < 0.001）。组间比较显示，VN组和MN组之间（P < 0.001）、B组和C组之间（P < 0.001）以及VN组和MS组之间（P < 0.001）的SBS存在统计学显著差异。用于比较三组粘结失败模式分布的卡方检验表明，VN组内聚性失败显著更多，而MN组和MS组内粘结性失败显著更多。
全酸蚀冲洗型树脂水门汀，即Variolink N（VN组），与自酸蚀和自粘接型树脂水门汀，即Multilink N和Multilink Speed相比，能产生显著更高的全瓷与牙本质表面的粘结强度。
