Falakaloğlu Seda, Adıgüzel Özkan, Özdemir Gökhan
Department of Endodontics, Faculty of Dentistry, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey.
Department of Endodontics, Faculty of Dentistry, Dicle University, Diyarbakır, Turkey.
J Dent Res Dent Clin Dent Prospects. 2019 Fall;13(4):274-280. doi: 10.15171/joddd.2019.042.
Several types of post have been developed for clinical use. A biological dentin post obtained from an extracted tooth eliminates the problems arising from material differences and reduces the fracture rate in teeth undergoing root canal treatment. This study used finite element analysis to compare a biological dentin post with posts made of two different materials. Three 3D models of the upper central incisor were created, and stainless-steel, glass fiber and biological dentin posts were applied to these models. The restoration of the models was completed by applying a composite as the core structure and a ceramic crown as the superstructure. Using finite element stress analysis in the restoration models, a 100-N force was applied in the vertical and horizontal directions and at a 45º angle, and the suitability of the biological dentin post was evaluated by comparing the data. Under the applied forces, the greatest stress accumulation was seen in the models with the stainless steel post. Because the stainless steel post was more rigid, stress forces accumulated on the surface instead of being transmitted to the tooth tissue. In the models with the glass fiber and biological dentin posts, the post material responded to the stratification in tandem with the dental tissue and did not cause excessive stress accumulation on the tooth or post surfaces. The results showed that biological dentin posts prevent the accumulation of stresses that might cause fractures in teeth undergoing root canal treatment. In addition, the physical compatibility and biocompatibility of a biological dentin post with the tooth imply that it is a good alternative to the types of post currently used.
已经开发出几种类型的桩用于临床。从拔除的牙齿获得的生物牙本质桩消除了材料差异引起的问题，并降低了接受根管治疗的牙齿的骨折率。本研究使用有限元分析来比较生物牙本质桩与由两种不同材料制成的桩。创建了上颌中切牙的三个三维模型，并将不锈钢桩、玻璃纤维桩和生物牙本质桩应用于这些模型。通过应用复合材料作为核心结构和陶瓷冠作为上部结构来完成模型的修复。在修复模型中使用有限元应力分析，在垂直和水平方向以及45°角施加100 N的力，并通过比较数据来评估生物牙本质桩的适用性。在施加的力作用下，不锈钢桩模型中观察到最大的应力积累。由于不锈钢桩更坚硬，应力集中在表面而不是传递到牙齿组织。在玻璃纤维桩和生物牙本质桩模型中，桩材料与牙齿组织协同响应分层，并且不会在牙齿或桩表面上引起过度的应力积累。结果表明，生物牙本质桩可防止在接受根管治疗的牙齿中可能导致骨折的应力积累。此外，生物牙本质桩与牙齿的物理相容性和生物相容性意味着它是目前使用的桩类型的良好替代品。
