上颌无牙颌不同种植位点联合翼上颌种植的有限元分析  

Finite element analysis of maxillary edentulous at different implant sites combined with the pterygomaxillary implants

作　　者：胡灵玉 何家才[1] Hu Lingyu;He Jiacai(Stomatological College of Anhui Medical University,Affiliated Stomatological Hospital of Anhui Medical University,Hefei 230032)

机构地区：[1]安徽医科大学口腔医学院,安徽医科大学附属口腔医院,合肥230032

出　　处：《安徽医科大学学报》2023年第4期702-706,共5页Acta Universitatis Medicinalis Anhui

基　　金：国家自然科学基金(编号:81771117)。

摘　　要：目的探讨不同种植位点联合翼上颌种植对上颌无牙颌种植体与骨组织生物力学影响,为临床选择符合生物力学原则的种植设计方案提供依据。方法选取1例上颌后牙骨量不足的无牙颌锥形束CT扫描数据,完成上颌骨三维实体模型的建立,利用冠修复体和种植体数据,分别建立冠修复体和种植体-基台一体三维实体模型,设计5组不同种植位点的三维有限元模型,以单侧200 N的垂直载荷和100 N斜向载荷分别在双侧后牙区加载,应用ANSYS有限元分析软件计算种植体和周围骨组织表面的应力分布,采用SPSS 26.0软件包对数据进行统计学分析。结果①5组模型均显示最大应力集中在种植体颈部和颈部皮质骨处。②5组模型在斜向载荷下的种植体最大应力值大于垂直载荷(P<0.05),骨组织周围最大应力值差异无统计学意义。③不同种植位点联合翼上颌种植模型间种植体及骨组织最大应力值比较,差异无统计学意义。结论上颌无牙颌种植固定修复,双侧对称性植入翼上颌种植体,改变前部种植体位点不会影响整个设计的应力分布。Objective To explore the effects of different implant sites combined with pterygomaxillary implantation on the biomechanics of implant and bone tissue,and to provide a basis for clinical selection of implant design in accordance with biomechanical principles.Methods The cone-beam CT scan data of an edentulous maxillary with inadequate posterior bone were selected to complete the establishment of the three-dimensional entity model of the maxilla.The prosthesis and implant-abutment integrated three-dimensional entity models were established using the prosthesis and implant data,and five groups of three-dimensional finite element models of different implant sites were designed.A unilateral vertical load of 200 N and an oblique load of 100 N were applied to the bilateral posterior dental area,respectively.ANSYS finite element analysis software was used to calculate the stress distribution on the surface of the implant and surrounding bone tissue.SPSS 26.0 software package was used to statistically analyze the data.Results①All the five models showed that the maximum stress was concentrated in the neck of the implants and cortical bone.②The maximum stress value of the implant under oblique loading was greater than that under vertical loading(P<0.05),but there was no significant difference in the maximum stress value around bone tissue in the 5 groups of models.③There was no significant difference in the maximum stress of the implant and bone between the different implant sites combined with pterygomaxillary implants.Conclusion In the fixed restoration of maxillary edentulous implants,pterygomaxillary implants implanted symmetrically on both sides and changing the position point of the anterior implant do not affected the stress distribution of the whole design.In clinical practice,suitable sites can be selected according to the residual bone mass of patients,and combined with pterygomaxillary implantation for implant design.

关 键 词：上颌无牙颌 翼上颌种植 有限元分析 

分 类 号：R783.6[医药卫生—口腔医学]