摘要
目的探讨个性化表面多孔钛根形种植体的生物力学性能,为多孔根形种植体的设计及临床植入提供理论依据。方法根据CT数据,运用3-matic软件设计表面多孔个性化根形种植体模型,并将其与下颌骨模型进行配准、网格划分和赋予材料学参数,负载200 N分析种植体最大应力及其周围骨的应力、应变。选择合适的临床病例微创拔牙后即刻植入种植体,并进行临床评价。结果表面多孔个性化根形种植体的峰值应力主要集中在种植体实体结构和多孔结构的接触界面上,且实体、多孔结构最大应力分别为137.710、37.008 MPa,均小于其屈服强度。3D打印多孔根形种植体拔牙后即刻植入后初期稳定性良好,创伤小,力学传导与天然牙类似,简化了手术流程,缩短了治疗时间,患者满意度较高。结论 3D打印表面多孔根形种植体为拔牙后即刻种植开辟一种新的方法。
Objective To investigate biomechanical properties of personalized titanium root-analogue implants with porous surface,so as to provide theoretical basis for the design and clinical implantation of such implants.Methods Based on CT data,the personalized model of root-analogue implant with porous surface was designed by using 3-matic software,and after registering it with the mandible model,the mesh was divided and material parameters were attributed. The implant was applied with 200 N loading,and the maximum stress of the implant and the stress and strain of the bone around the implant were analyzed. An appropriate clinical case was selected and the implant was implanted immediately after tooth extraction for conducting clinical evaluation. Results The peak stress of the personalized root-analogue implant with porous surface was mainly concentrated on the interface between the solid structure and the porous structure of the implant. The maximum stresses of the solid structure and porous structure were 137. 710 and 37. 008 MPa,respectively,which were smaller than its yield strength. The three-dimensional( 3 D) printed porous root-analogue implants had good initial stability immediately after implantation,with minimal trauma and similar mechanical transmission to natural teeth. This simplified the surgical process,shortened the treatment time,and had high patient satisfaction. Conclusions The 3 D printed root-analogue implant with porous surface explores a new method for immediate implantation after tooth extraction.
作者
郭芳
黄硕
胡敏
王超
刘昌奎
GUO Fang;HUANG Shuo;HU Min;WANG Chao;LIU Changkui(College of Stomatology,Xi'an Medical University,Xi'an 710021,China;Department of Oral and Maxillofacial Surgery,General Hospital of Chinese PLA,Beijing 100853,China;Chongqing Key Laboratory of Oral Diseases and Biomedical Science,Affiliated Stomatology Hospital of Chongqing Medical University,Chongqing 400147,China)
出处
《医用生物力学》
EI
CAS
CSCD
北大核心
2021年第1期85-91,共7页
Journal of Medical Biomechanics
基金
国家自然科学基金项目(81470726)
西安医学院高层次人才引进基金项目(2018RCYJ03)
陕西省卫生健康科研项目(2018D072)
陕西省西安市未央区科技计划项目(201929)。
关键词
3D打印
根形种植体
表面多孔
即刻种植
three-dimensional(3D)printing
root-analogue implants
porous surface
immediate implantation
