Ehsani Sara, Mirhashemi Fatemeh Sadat, Asgary Saeed
Dental Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Iran Endod J. 2013 Spring;8(2):44-7. Epub 2013 May 1.
Mandibular first molar is the most important tooth with complicated morphology. In finite element (FE) studies, investigators usually prefer to model anterior teeth with a simple and single straight root; it makes the results deviate from the actual case. The most complicated and time-consuming step in FE studies is modeling of the desired tooth, thus this study was performed to establish a finite element method (FEM) of reconstructing a mandibular first molar with the greatest precision.
An extracted mandibular first molar was digitized, and then radiographed from different aspects to achieve its outer and inner morphology. The solid model of tooth and root canals were constructed according to this data as well as the anatomy of mandibular first molar described in the literature.
A three-dimensional model of mandibular first molar was created, giving special consideration to shape and root canal system dimensions.
This model may constitute a basis for investigating the effect of different clinical situations on mandibular first molars in vitro, especially on its root canal system. The method described here seems feasible and reasonably precise foundation for investigations.
下颌第一磨牙是形态最为复杂的重要牙齿。在有限元研究中，研究人员通常倾向于对具有简单单根的前牙进行建模；这使得结果偏离实际情况。有限元研究中最复杂且耗时的步骤是对目标牙齿进行建模，因此进行本研究以建立一种能以最高精度重建下颌第一磨牙的有限元方法（FEM）。
将一颗拔除的下颌第一磨牙进行数字化处理，然后从不同角度进行放射照相以获取其外部和内部形态。根据这些数据以及文献中描述的下颌第一磨牙的解剖结构构建牙齿和根管的实体模型。
创建了一个下颌第一磨牙的三维模型，特别考虑了形状和根管系统尺寸。
该模型可为体外研究不同临床情况对下颌第一磨牙，尤其是其根管系统的影响奠定基础。这里描述的方法似乎是用于研究的可行且相当精确的基础。
