Manekar Varsha Sunil, Datarkar Abhay N, Ghormode Ashlesha, Daware Surendra, Pandilwar Prashant, Sapkal Pranav
Oral and Maxillofacial Surgery, Government Dental College & Hospital, Nagpur, Maharashtra 444003 India.
Nagpur, India.
J Maxillofac Oral Surg. 2023 Sep;22(3):688-694. doi: 10.1007/s12663-023-01950-3. Epub 2023 Jun 18.
The residual post-COVID maxillary mucormycosis defect (PCMMD) were extensive, due to unilateral or bilateral maxillectomies. The Goal of rehabilitation of PCMMD is to deliver a prosthetically driven reconstruction. FEA was to evaluate the biomechanical response of PSI struts (PSI 1), PSI Screw retained (PSI 2) and QZI to masticatory load on virtual simulation to improve accuracy and enhance the design.
To validate and compare the Biomechanical benefit of the PSI struts, PSI Screw retained, QZI in a case of rehabilitation of post-COVID maxillary mucormycosis defect (PCMMD) by FEA study.
The result of stress to masticatory load on virtual simulation for (1) Maximum and minimum stress (Von Mises stress); (2) the Displacement (in three positions) and (3) the Deformation (Plastic strain) was compared on virtual simulation for PSI 1 and PSI 2 and QZI.
The FEA and comparative evaluation of PSI 1, PSI 2 and QZI showed a good resistance to displacement. The stress and strain values are low and acceptable. In comparison QZI shows more stress in the anterior region.
由于单侧或双侧上颌骨切除术，新冠后上颌毛霉菌病残留缺损（PCMMD）范围广泛。PCMMD修复的目标是进行假体驱动的重建。有限元分析（FEA）旨在评估个性化手术导板支柱（PSI 1）、个性化手术导板螺钉固位（PSI 2）和QZI在虚拟模拟中对咀嚼负荷的生物力学反应，以提高准确性并优化设计。
通过有限元分析研究，验证并比较PSI支柱、PSI螺钉固位、QZI在新冠后上颌毛霉菌病缺损（PCMMD）修复病例中的生物力学优势。
在虚拟模拟中，比较PSI 1、PSI 2和QZI在咀嚼负荷下的应力结果（1. 最大和最小应力（冯·米塞斯应力）；2. 位移（三个位置）；3. 变形（塑性应变））。
对PSI 1、PSI 2和QZI的有限元分析及比较评估显示，它们具有良好的抗位移能力。应力和应变值较低且可接受。相比之下，QZI在前部区域显示出更多应力。
