Department of Conservative Dentistry and Endodontics, Sharad Pawar Dental College, Datta Meghe Institute of Higher Education and Research, Nagpur, Maharashtra, India.
F1000Res. 2024 Jul 26;13:49. doi: 10.12688/f1000research.133800.2. eCollection 2024.
Endodontic treatment is the most common method for resolving pulpal and periapical pathology. However, various studies have reported that almost 11%-13% of all teeth that undergo extraction after endodontic treatment show the presence of cracks, craze lines, and vertical root fractures. Teeth with inadequate post endodontic restoration are more prone to fracture and coronal leakage, resulting in the diffusion of oral fluids, bacteria, bacterial products, and possibly root canal treatment failure. Furthermore, studies have advocated the use of endodontically treated teeth with restorative materials that have a similar or higher elastic modulus than the tooth for providing stiffness against forces that cause root fracture. Intraorifice barriers made of restorative materials that can bond to radicular dentin could thus be used to reinforce the radicular dentin while also preventing coronal microleakage. Although the sealing ability of intraorifice barriers has been widely compared in the literature, there have been few studies on the strengthening effect of the materials used in the study as intraorifice barriers when placed into the root canal. As a result, the current study aims to assess the effect of various materials as intraorifice barriers (Cention N, Resin modified glass ionomer cement, and short fiber reinforced flowable composite) on the force required fracture teeth after root canal treatment.
This study will be done on extracted human mandibular premolars with single root canal where after doing root canal treatment 2-3 mm obturating material would be replaced by intra orifice barriers (Cention N, resin modified glass ionomer cement [RMGIC], and short fiber reinforced flowable composite). The force required to fracture teeth will be calculated using universal testing machine.
根管治疗是解决牙髓和根尖病变最常用的方法。然而，多项研究报告称，所有接受根管治疗后拔牙的牙齿中，有近 11%-13%存在裂纹、微裂纹和垂直根折。根管治疗后修复不充分的牙齿更容易发生骨折和冠部渗漏，导致口腔液、细菌、细菌产物扩散，并可能导致根管治疗失败。此外，研究提倡使用与牙齿弹性模量相似或更高的修复材料来增强根管内牙齿，以抵抗导致根折的力。因此，可以使用与根管内牙本质结合的修复材料制成的孔内屏障来增强根管内牙本质，同时防止冠部微渗漏。尽管文献中广泛比较了孔内屏障的密封能力，但关于用作孔内屏障的材料在放置到根管内时的增强效果的研究很少。因此，本研究旨在评估各种材料（Cention N、树脂改良玻璃离子水门汀和短纤维增强型流动复合树脂）作为孔内屏障对根管治疗后牙齿断裂所需力的影响。
本研究将在具有单根管的人下颌前磨牙上进行，根管治疗后，用孔内屏障（Cention N、树脂改良玻璃离子水门汀[RMGIC]和短纤维增强型流动复合树脂）取代 2-3 毫米的填充材料。使用万能试验机计算断裂牙齿所需的力。
