State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, 710032, China.
School of Stomatology, XI'AN Medical University, Xi'an, 710021, China.
Sci Rep. 2020 Apr 24;10(1):6927. doi: 10.1038/s41598-020-63666-5.
Dental implant may suffer transient external impacts. To simulate the effect of impact forces on bone damage is very important for evaluation of damage and guiding treatment in clinics. In this study, an animal model was established by inserting an implant into the femoral condyle of New Zealand rabbit. Implant with good osseointegration was loaded with impact force. A three-dimensional finite element model was established based on the data of the animal model. Damage process to bone tissue was simulated with Abaqus 6.13 software combining dynamic mechanical properties of the femur. The characteristics of bone damage were analyzed by comparing the results of animal testing with numerical simulation data. After impact, cortical bone around the implant and trabecular at the bottom of the implant were prone to damage. The degree of damage correlated with the direction of loading and the magnitude of the impact. Lateral loading was most likely performed to damage cancellous bone. The stress wave formed by the impact force can damage the implant-bone interface and peri-implant trabeculae. The data from numerical simulations were consistent with data from animal experiments, highlighting the importance of a thorough examination and evaluation based on the patient's medical history.
种植体可能会受到短暂的外部冲击。模拟冲击力对骨损伤的影响对于评估损伤和指导临床治疗非常重要。本研究通过将种植体插入新西兰兔股骨髁建立动物模型。将具有良好骨整合的种植体加载冲击力。基于动物模型的数据，使用 Abaqus 6.13 软件建立了三维有限元模型，结合股骨的动态力学特性模拟骨组织的损伤过程。通过比较动物试验结果与数值模拟数据来分析骨损伤的特征。冲击后，种植体周围的皮质骨和种植体底部的松质骨容易受损。损伤程度与加载方向和冲击大小有关。侧向加载最有可能导致松质骨受损。冲击力形成的应力波会破坏种植体-骨界面和种植体周围的小梁骨。数值模拟数据与动物实验数据一致，突出了基于患者病史进行全面检查和评估的重要性。
