Department of Restorative & Prosthetic dental sciences, College of Dentistry, King Saud Bin Abdulaziz University for health sciences, Kingdom of Saudi Arabia.
Department of Conservative Dentistry & Endodontics, Chettinad Dental College & Research Institute, Tamil Nadu, India.
J Mech Behav Biomed Mater. 2018 Jun;82:235-238. doi: 10.1016/j.jmbbm.2018.03.030. Epub 2018 Mar 29.
This study aims to compare the ex vivo fracture resistance of root canal treated (RCT) teeth restored with four different types of fibers under composite resin.
One hundred and forty extracted mandibular first molar teeth were assigned to seven groups (n = 20/group). Group 1 was the control group. In groups 2-7, endodontic access and standard Mesio-occluso-distal (MOD) cavities were prepared. Following RCT, group 2 was left unrestored. In group 3, flowable composite resin (FCR) was used to line the cavities and restored with composite resin. In groups 4,5,6 and 7, Ribbond, Everstick, Dentapreg and Bioctris fibers were inserted in flowable resin and restored respectively.
All the groups restored with fiber reinforced composite displayed higher fracture resistance than the group restored with only composite resin (p < 0.001). In addition, Groups restored with Everstick and Bioctris (Groups 5 and 7) showed higher fracture resistance when compared to Ribbond and Dentapreg (Groups 4 and 6).
E glass fibers demonstrated highest fracture resistance and hence can be preferred over other fiber types to reinforce RCT teeth with weakened crown structures.
本研究旨在比较在复合树脂下用四种不同类型纤维修复的根管治疗（RCT）牙齿的体外抗折能力。
将 140 颗下颌第一磨牙随机分为 7 组（每组 n=20）。第 1 组为对照组。第 2-7 组进行牙髓腔预备和标准近中-颊舌-远中（MOD）腔预备。RCT 后，第 2 组未修复。第 3 组用流动复合树脂（FCR）衬里并以复合树脂修复。第 4、5、6 和 7 组分别用 Ribbond、Everstick、Dentapreg 和 Bioctris 纤维插入流动树脂并进行修复。
用纤维增强复合树脂修复的所有组的抗折能力均高于仅用复合树脂修复的组（p<0.001）。此外，与 Ribbond 和 Dentapreg（第 4 和 6 组）相比，用 Everstick 和 Bioctris（第 5 和 7 组）修复的组显示出更高的抗折能力。
E 玻璃纤维表现出最高的抗折能力，因此可以优先于其他纤维类型，用于增强具有薄弱冠结构的 RCT 牙齿。
