Nalbantgil Didem, Tozlu Murat, Ozdemir Fulya, Oztoprak Mehmet Oguz, Arun Tulin
Department of Orthodontics, Faculty of Dentistry, Yeditepe University, Istanbul, TURKIYE.
Eur J Dent. 2012 Jan;6(1):9-15.
Non-homogeneous force distribution along the miniplates and the screws is an unsolved question for skeletal anchorage in orthodontics. To overcome this issue, a miniplate structure was designed featuring spikes placed on the surface facing the cortical bone. The aim of this study was to examine and compare the force distribution of the newly designed plate-screw systems with the conventional one.
A model of bone surface with 1.5 mm cortical thickness, along with the two newly designed miniplates and a standard miniplate-screw were simulated on the three-dimensional model. 200 g experimental force was applied to the tip of the miniplates and the consequential effects on the screws and cortical bone was evaluated using three-dimensional finite element method.
As a result of this finite element study, remarkably lower stresses were observed on the screws and the cortical bone around the screws with the newly designed miniplate when compared with the conventional one.
The newly designed miniplate that has spikes was found effective in reducing the stress on and around the screws and the force was distributed more equivalently.
沿微型钛板和螺钉的力分布不均匀是正畸骨骼锚固中一个尚未解决的问题。为克服这一问题，设计了一种微型钛板结构，其特点是在面向皮质骨的表面设置了尖刺。本研究的目的是检验和比较新设计的钛板 - 螺钉系统与传统系统的力分布情况。
在三维模型上模拟了一个皮质厚度为1.5毫米的骨表面模型，以及两个新设计的微型钛板和一个标准的微型钛板 - 螺钉。将200克实验力施加到微型钛板的尖端，并使用三维有限元方法评估对螺钉和皮质骨的相应影响。
作为这项有限元研究的结果，与传统微型钛板相比，新设计的微型钛板在螺钉及其周围皮质骨上观察到的应力显著更低。
发现带有尖刺的新设计微型钛板在减少螺钉及其周围的应力方面有效，并且力分布更均匀。
