Verma Vibhuti, Bansal Abhishek, Kukreja Navneet, Kaur Sunpreet, Varsha Prabhu, Zanjad Supriya R
Department of Conservative Dentistry and Endodontics, Maharishi Markendeswar College of Dental Sciences & Research, Mullana, Ambala, Haryana, India.
Department of Conservative Dentistry and Endodontics, Saraswati Dental College, Lucknow, UP, India.
Bioinformation. 2022 Oct 31;18(10):858-861. doi: 10.6026/97320630018858. eCollection 2022.
It is of interest to evaluate the fracture resistance of endodontically and non-endodontically treated teeth with class II cavity using different techniques and materials. Endodontic access cavities were prepared with the diamond fissure bur following the MOD cavity preparations,. The root canals preparation was done followed by obturation using the single cone obturation technique. Later all the samples were embedded in acrylic resin blocks and divided into 8 groups; Group 1: -Intact teeth (Control), Group 2: - MOD (unfilled), Group 3: - MOD restored with composite resin (3M FILTEK P-60 packable), Group 4: - MOD restored with Cention N (Ivoclar Vivadent), Group 5: - 10 mm fiber-post with composite resin, Group 6: - 5mm fiber post with composite resin, Group 7: - Ribbond on the occlusal and composite resin, and Group 8: - Horizontal fiber post with composite resin. Later all samples were subjected for fracture resistance testing using Universal Testing Machine. The mean fracture resistance of Control (513.2 N), Unfilled (60.2N), composite resin (221 N), cention N (88.9 N), 10 mm fiber post (271.4 N), 5 mm fiber post (245 N), Ribbond (456.4N), and horizontal fiber post (338.1N) was found. The fracture resistance values are statistically significant between each group. Best fracture resistance was found to be of intact teeth followed by ribbond on the occlusal surface after endodontic treatment and least fracture resistance of MOD unfilled. Thus, ribbond method is good for the occlusal of teeth compared to other materials for fracture resistance.
使用不同技术和材料评估经根管治疗和未经根管治疗的Ⅱ类洞牙齿的抗折性很有意义。在制备MOD洞型后，用金刚石裂钻制备根管入口洞型。进行根管预备，然后采用单锥充填技术进行充填。之后将所有样本嵌入丙烯酸树脂块中，并分为8组：第1组：完整牙齿（对照组）；第2组：MOD（未充填）；第3组：用复合树脂（3M FILTEK P - 60可压实型）修复的MOD；第4组：用Cention N（义获嘉伟瓦登特公司）修复的MOD；第5组：带复合树脂的10mm纤维桩；第6组：带复合树脂的5mm纤维桩；第7组：咬合面用Ribbond和复合树脂；第8组：水平纤维桩和复合树脂。之后使用万能试验机对所有样本进行抗折性测试。得出对照组（513.2N）、未充填组（60.2N）、复合树脂组（221N）、Cention N组（88.9N）、10mm纤维桩组（271.4N）、5mm纤维桩组（245N）、Ribbond组（456.4N）和水平纤维桩组（338.1N）的平均抗折力。每组之间的抗折力值具有统计学意义。发现抗折性最好的是完整牙齿，其次是根管治疗后咬合面用Ribbond的情况，而MOD未充填组的抗折性最差。因此，与其他抗折材料相比，Ribbond方法对牙齿咬合面较好。
