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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >The effect of fiber insertion on fracture resistance of endodontically treated molars with MOD cavity and reattached fractured lingual cusps.
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The effect of fiber insertion on fracture resistance of endodontically treated molars with MOD cavity and reattached fractured lingual cusps.

机译：纤维插入对带MOD腔和重新连接的骨折舌尖的牙髓治疗磨牙的抗断裂性的影响。

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摘要

In this study, the effect of flowable composite reinforced with a leno wave ultra high modulus (LWUHM) polyethylene fiber (Ribbond) on fracture resistance of endodontically treated molars with MOD cavity and lingual cuspal fracture was evaluated. Sixty sound extracted human mandibular molars were randomly assigned to six groups (n = 10). Group 1 served as control. Teeth in groups 2-6 received root canal treatment and a MOD cavity preparation. Teeth in group 2 were kept unrestored. Lingual walls of specimens in groups 3-6 were fractured at the CEJ and reattached (C&B Super-Bond). Group 3 was kept unrestored, and group 4 was restored with a composite resin (CR) (AP-X). In group 5, a flowable resin (FR, Protect Liner F) and in group 6, a Ribbond in combination with FR were inserted inside the cavity before CR restoration. After finishing and polishing, the specimens were subjected to compressive loading perpendicular to the occlusal surface at a crosshead speed of 1 mm/min. The mean load necessary to fracture were recorded in Newton and the results were statistically analyzed. MOD cavity preparation reduced fracture resistance of endodontically treated teeth (p < 0.05). Fracture resistance of rebonded fractured specimens was found to be similar to that of the nonfractured samples (p > 0.05). Use of LWUHM polyethylene fiber Ribbond increased fracture strength of endodontically treated molar teeth with MOD cavity preparation and cuspal fracture (p < 0.05). As a result, it was concluded that the insertion of Ribbond inside the cavity has a positive effect on fracture strength of endodontically treated molar teeth with MOD cavity preparation and cuspal fracture.
机译：在这项研究中，评价了使用雷诺波超高模量（LWUHM）聚乙烯纤维（Ribbond）增强的可流动复合材料对采用牙髓腔进行牙髓治疗的磨牙的抗断裂性和舌尖骨折的影响。 60个声音提取的人类下颌磨牙被随机分为6组（n = 10）。第一组作为对照组。第2-6组的牙齿接受了根管治疗和MOD腔准备。第2组的牙齿保持未复原状态。将3-6组样本的舌壁在CEJ处骨折并重新连接（C＆B Super-Bond）。使第3组恢复原状，并使用复合树脂（CR）（AP-X）恢复第4组。在第5组中，在CR恢复之前将可流动的树脂（FR，保护衬里F）和在第6组中，与FR结合的带状树脂插入腔体内。精加工和抛光后，以1 mm / min的十字头速度使样品垂直于咬合面承受压缩载荷。在牛顿中记录断裂所需的平均载荷，并对结果进行统计分析。 MOD腔准备降低了经牙髓治疗的牙齿的抗断裂性（p <0.05）。发现重新粘合的断裂样品的断裂强度与未断裂样品相似（p> 0.05）。 LWUHM聚乙烯纤维的带状绑扎通过MOD腔制备和骨骨折可提高经牙髓治疗的磨牙的断裂强度（p <0.05）。结果，得出的结论是，将带状物插入腔内对采用MOD腔制备牙髓治疗和牙髓骨折对经牙髓治疗的磨牙的断裂强度具有积极影响。

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