附着体类型对种植支持可摘局部义齿应力分布的影响
发布时间：2018-07-22 10:38
【摘要】：目的:研究种植支持可摘局部义齿修复下颌远中游离端缺失的应力分布,探讨附着体类型对于种植体、各支持组织、义齿以及附着体的应力影响。方法:建立可摘局部义齿修复下颌双侧前磨牙和磨牙缺失的KennedyⅠ类牙列缺损的三维有限元模型,分别为采用传统可摘局部义齿(无种植体)、种植体+Locator附着体+可摘局部义齿、种植体+Magfit磁性附着体+可摘局部义齿进行修复。分析对比各主要成分的应力分布,得到最大von Mises应力值和位移值。结果:建立含有牙体组织、牙周组织以及种植体、附着体、可摘局部义齿的三维有限元模型。有种植体的模型义齿基托下黏骨膜的最大位移量(Locator模型垂直向载荷9.38μm、斜向载荷45.48μm,Magfit模型垂直向载荷9.54μm、斜向载荷39.45μm)小于没有种植体的RPD(removable partial dentures)模型(模型垂直向载荷95.27μm,斜向155.70μm)。Locator和Magfit两种类型的附着体相比较,Locator模型中种植体颈部周围皮质骨的最大应力值大于Magfit模型(Locator模型垂直向载荷10.850 MPa、斜向载荷43.760 MPa,Magfit模型垂直向载荷7.100 MPa、斜向载荷19.260 MPa)。Magfit模型中末端基牙的牙周膜受力更小(Locator模型垂直向载荷0.520MPa,Magfit模型垂直向载荷0.420 MPa)。结论:在修复下颌KennedyⅠ类牙列缺损时,种植支持可摘局部义齿可减少对末端基牙的扭力,提高义齿稳定性;Locator和Magfit磁性附着体两者对比,Locator附着体水平约束作用更大。
[Abstract]:Objective: to study the stress distribution of removable partial dentures in the restoration of mandibular distal free end, and to explore the effect of attachment type on the stress of implant, supporting tissue, denture and attachment. Methods: three dimensional finite element models were established for the restoration of Kennedy class I dentition defects in mandibular premolars and molars with removable partial dentures. The models were: traditional removable partial dentures (without implants) and implants Locator attachments removable partial dentures. The implant Magfit magnetic attachment is removable partial denture for restoration. The maximum von Mises stress value and displacement value are obtained by analyzing and comparing the stress distribution of the main components. Results: a three dimensional finite element model with dental tissue, periodontal tissue, implants, attachments and removable partial dentures was established. The maximum displacement of the mucous periosteum under the denture base (the vertical load is 9.38 渭 m, the oblique load is 45.48 渭 m, the vertical load is 9.54 渭 m, the oblique load is 39.45 渭 m) is lower than that in the model without implant (the vertical load is 95.27 渭 m). Comparison of oblique 155.70 渭 m) .Locator and Magfit attachment the maximum stress value of cortical bone around implant neck in Locator model is larger than that in Magfit model (vertical load 10.850 MPA, oblique load 43.760 MPA Magfit model 7.100 MPA, oblique load 7.100 MPA) The stress of periodontal ligament of the end abutment in the Magfit model was less (the vertical load of the model was 0.520 MPA) and the vertical load of the Magfit model was 0.420 MPA. Conclusion: in the restoration of mandibular Kennedy 鈪，
本文编号：2137170
[Abstract]:Objective: to study the stress distribution of removable partial dentures in the restoration of mandibular distal free end, and to explore the effect of attachment type on the stress of implant, supporting tissue, denture and attachment. Methods: three dimensional finite element models were established for the restoration of Kennedy class I dentition defects in mandibular premolars and molars with removable partial dentures. The models were: traditional removable partial dentures (without implants) and implants Locator attachments removable partial dentures. The implant Magfit magnetic attachment is removable partial denture for restoration. The maximum von Mises stress value and displacement value are obtained by analyzing and comparing the stress distribution of the main components. Results: a three dimensional finite element model with dental tissue, periodontal tissue, implants, attachments and removable partial dentures was established. The maximum displacement of the mucous periosteum under the denture base (the vertical load is 9.38 渭 m, the oblique load is 45.48 渭 m, the vertical load is 9.54 渭 m, the oblique load is 39.45 渭 m) is lower than that in the model without implant (the vertical load is 95.27 渭 m). Comparison of oblique 155.70 渭 m) .Locator and Magfit attachment the maximum stress value of cortical bone around implant neck in Locator model is larger than that in Magfit model (vertical load 10.850 MPA, oblique load 43.760 MPA Magfit model 7.100 MPA, oblique load 7.100 MPA) The stress of periodontal ligament of the end abutment in the Magfit model was less (the vertical load of the model was 0.520 MPA) and the vertical load of the Magfit model was 0.420 MPA. Conclusion: in the restoration of mandibular Kennedy 鈪，
本文编号：2137170
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