Department of Oral and Maxillofacial Surgery, Istanbul University, Istanbul, Turkey.
J Craniofac Surg. 2023 Sep 1;34(6):1737-1740. doi: 10.1097/SCS.0000000000009238. Epub 2023 Mar 1.
BACKGROUND/AIM: Different types of plates are used in clinical practice for the management of subcondylar fractures. This study aimed to compare the performance of poly- L -lactic acid (PLLA) and titanium trapezoidal plates in the fixation of subcondylar mandibular fractures using finite element analysis.
Titanium and PLLA trapezoidal plates and screws were placed on the virtual model obtained from computed tomography images of a patient with a subcondylar fracture to perform finite element analysis. The analysis included maximum tension distribution, maximum principal strain, displacement, and deformation of the bone, plates, and screws.
The maximum tension distribution and maximum principal stress were found to be significantly higher on the titanium plate than on the PLLA plate and screws. Almost no difference was found between the trapezoidal and PLLA plates regarding the displacement of the fracture fragments at the fracture line. No difference was recorded regarding the displacement of the PLLA and titanium screws. The values of maximal principal strain between the PLLA and titanium materials showed no significant difference.
The trapezoidal PLLA plates can be an alternative to trapezoidal titanium plates due to their functional stability and rigidity.
背景/目的：临床上使用不同类型的接骨板来处理髁突下骨折。本研究旨在通过有限元分析比较聚左旋乳酸（PLLA）和钛梯形板在固定下颌髁突骨折中的性能。
将钛和 PLLA 梯形板和螺钉放置在患者髁突下骨折的 CT 图像获得的虚拟模型上进行有限元分析。分析包括最大张力分布、最大主应变、骨、板和螺钉的位移和变形。
钛板的最大张力分布和最大主应变明显高于 PLLA 板和螺钉。在骨折线处骨折碎片的位移方面，梯形板和 PLLA 板之间几乎没有差异。PLLA 和钛螺钉的位移没有差异。PLLA 和钛材料之间的最大主应变值没有显著差异。
由于功能稳定性和刚性，梯形 PLLA 板可以替代梯形钛板。
