Dahake Sandeep, Kuthe Abhaykumar, Kulkarni Sanket, Mawale Mahesh
Mechanical Engineering Department, Visvesvaraya National Institute of Technology, Nagpur, India.
National Center for Disease Control, Delhi, India.
Int J Med Robot. 2018 Feb;14(1). doi: 10.1002/rcs.1854. Epub 2017 Sep 4.
The aim of this work was to compare different 12 cases (3 patients * 4 cases = 12 cases) with varying gaps between implant and bone by analyzing the effect of these gaps on implant and screws using FEM.
In each patient's case 1 using CSOG and in case 2, 3, and 4 without using CSOG tumor cutting was done. Hence in each patient zero gaps at case 1 and overcutting at case 2, 3, and 4 have obtained at different locations.
FEM results reveal that in each patient's case 4 (maximum gap) was more susceptible to loosening of the screws due to higher strains (37%) and implant failure due to higher stress (28%) concentration under the same loading conditions when compared with case 1 (zero gap).
The study reveals that mandibular reconstruction with implant placement using CSOG can significantly enhance the stability and safety of the implant.
本研究旨在通过有限元分析，比较12个不同病例（3名患者×4种病例 = 12例）中种植体与骨之间存在不同间隙的情况，分析这些间隙对种植体及螺钉的影响。
在每位患者的病例1中使用计算机辅助手术导板（CSOG）进行肿瘤切除，病例2、3和4不使用CSOG进行肿瘤切除。因此，在每位患者中，病例1实现了零间隙，病例2、3和4在不同位置出现了过度切除。
有限元分析结果显示，在相同加载条件下，与病例1（零间隙）相比，每位患者的病例4（最大间隙）因更高的应变（37%）导致螺钉更易松动，且因更高的应力集中（28%）导致种植体失败。
该研究表明，使用计算机辅助手术导板（CSOG）进行种植体植入的下颌骨重建可显著提高种植体的稳定性和安全性。
