Kale Apurva Ramchandra, Singh Shishir, Podar Rajesh, Kumar Mohan, Chandrasekhar Padmini, Kulkarni Gaurav
Department of Conservative Dentistry and Endodontics, Terna Dental College, Navi Mumbai, Maharashtra, India.
J Conserv Dent. 2021 Nov-Dec;24(6):589-593. doi: 10.4103/jcd.jcd_279_21. Epub 2022 Apr 1.
This study was carried out to assess the currently available composite systems in India for resistance to fracture in teeth with large cavities.
To evaluate the fracture toughness of weakened maxillary premolars restored by contemporary composites.
study was done in the department of conservative dentistry and endodontics.
Freshly extracted 44 human maxillary bicuspids were randomly divided into four groups where Group I included intact teeth. The teeth in the other three groups were subjected to a standardized mesio-occluso-distal cavity preparation. The cavities were filled in Group II with bioactive, nanohybrid composite with Giomer chemistry (Beautifil II LS, Shofu Inc., Kyoto, Japan), in Group III with highly filled, nanohybrid composite (Prevest Fusion Universal, Prevest DenPro Limited, Jammu, India) and in Group IV with fiber-reinforced composite with optimized fiber-aspect ratio technology (everX Posterior, GC EUROPE N. V., Leuven, Belgium). All the specimens were then subjected to thermocycling followed by incubation procedures. Fracture resistance was measured in Newton (N) using the universal testing machine.
Data obtained were tabulated and subjected to one-way analysis of variance (ANOVA) test followed by Tukey's test.
Highest mean fracture resistance was observed with Group I (2294.06), followed by Group II (1708.72), Group IV (1195.82), and Group III (825.38). One-way ANOVA test showed a statistically significant difference (P ≤ 0.05) between all the four groups. Tukey test was used for intergroup comparison and showed significant difference (P ≤ 0.05) in mean fracture resistance between groups.
The results suggest that the highest compressive fracture resistance was shown by Group II (Beautifil II LS composite resin).
本研究旨在评估印度目前可用的复合树脂系统对有大龋洞牙齿抗折性能的影响。
评估当代复合树脂修复的上颌前磨牙的断裂韧性。
本研究在保守牙科与牙髓病科进行。
44颗新鲜拔除的人上颌双尖牙随机分为四组，其中第一组为完整牙齿。其他三组牙齿进行标准化的近中-咬合-远中洞形预备。第二组用具有硅烷化玻璃陶瓷化学组成的生物活性纳米混合复合树脂（Beautifil II LS，日本松风株式会社，京都）充填龋洞，第三组用高填料纳米混合复合树脂（Prevest Fusion Universal，印度普瑞凡登普有限公司，查谟）充填，第四组用具有优化纤维长径比技术的纤维增强复合树脂（everX Posterior，比利时GC欧洲公司，鲁汶）充填。然后所有标本进行热循环，随后进行孵育程序。使用万能试验机以牛顿（N）为单位测量抗折强度。
所得数据列表并进行单因素方差分析（ANOVA），随后进行Tukey检验。
第一组平均抗折强度最高（2294.06），其次是第二组（1708.72）、第四组（1195.82）和第三组（825.38）。单因素方差分析显示四组之间存在统计学显著差异（P≤0.05）。Tukey检验用于组间比较，显示组间平均抗折强度存在显著差异（P≤0.05）。
结果表明，第二组（Beautifil II LS复合树脂）表现出最高的抗压抗折强度。
