Katona Thomas R
School of Dentistry, Indiana University, and of Mechanical Engineering, School of Engineering and Technology, Purdue University, Indianapolis 46202, USA.
Am J Orthod Dentofacial Orthop. 2006 Dec;130(6):698.e19-27. doi: 10.1016/j.ajodo.2006.06.012.
The purposes of this study were to analyze and critique the mathematical algorithms used in the clinical assessment of root resorption.
Geometric constructions and derived mathematical expressions were used to investigate the influence of tooth shape on the relationships between tooth, root, and crown lengths and their respective sizes as measured on before and after radiographs. results: The ambiguities of root-loss assessment protocols are demonstrated.
Root resorption assessment algorithms are unsuited for their intended applications.
本研究的目的是分析和批判用于牙根吸收临床评估的数学算法。
使用几何构造和推导的数学表达式来研究牙齿形状对牙齿、牙根和牙冠长度之间关系以及在前后位X线片上测量的它们各自大小的影响。结果：证明了牙根丧失评估方案的模糊性。
牙根吸收评估算法不适用于其预期应用。
