上颌All-on-4修复种植体在不同牙弓形态中应力分布的三维有限元分析
发布时间：2018-12-06 11:37
【摘要】：目的:利用有限元法探讨上颌牙列缺失应用All-on-4修复时种植体在3种牙弓形态模型中应力分布的差异,为临床提高种植体成功率提供客观参数。方法:参照3M公司MBTTM牙弓模板,应用SolidWorks 2013软件建立All-on-4种植修复的3种牙弓形态上颌无牙颌有限元模型(尖圆形、方圆形和卵圆形),设定皮质骨层为2mm,种植体长度为13mm,前牙区2颗种植体平行植入,后牙区2颗种植体在颌骨内沿近远中方向与牙长轴成0°、15°、30°和45°4种角度,所有种植体均固定于上部结构。通过2种加载方式在上部结构施加100N压力模拟咀嚼受力,应用有限元软件Abaqus 6.13运算测得种植体在上颌模型的Von-Mises应力值。结果:测得种植体周围Max von-Mises应力值均出现在皮质骨层,不同牙弓形态模型中应力分布不同,方圆形牙弓种植体周围应力随种植体角度增加而增大;卵圆形牙弓后牙区最大应力值出现在种植体倾斜15°时,前牙区应力在种植体倾斜超过15°后明显提高;尖圆形牙弓种植体周围应力在种植体倾斜45°时显著增大。结论:牙弓形态对种植体周围应力分布有显著影响,All-on-4修复上颌牙列缺失时,方圆形牙弓应尽量减少种植倾斜体角度,卵圆形牙弓种植体倾斜角度不宜超过15°,尖圆形牙弓应避免种植体倾斜角度超过30°。
[Abstract]:Objective: to explore the difference of stress distribution in three dental arch models when maxillary dentition was repaired with All-on-4 by using finite element method, and to provide objective parameters for clinical improvement of implant success rate. Methods: according to MBTTM arch template of 3M company, the finite element model of maxillary edentulous maxilla (cusp circle, square round and oval) was established with SolidWorks 2013 software, and the cortical bone layer was set up as 2 mm. The implant was 13mm in length, 2 implants in the anterior tooth region were parallel implanted, and 2 implants in the posterior tooth region were fixed in the upper structure at 4 angles of 0 掳, 15 掳, 30 掳and 45 掳along the proximal and distal direction of the maxilla. The masticatory force was simulated by applying 100N pressure to the superstructure under two loading modes. The Von-Mises stress of the implant in the maxillary model was measured by the finite element software Abaqus 6.13. Results: the stress values of Max von-Mises around the implant appeared in cortical bone layer. The stress distribution was different in different dental arch models. The stress around the implant increased with the increase of implant angle. The maximum stress value of the oval arch posterior region appeared when the implant tilted at 15 掳, the anterior tooth stress increased significantly after the implant tilted more than 15 掳, and the stress around the apical circular arch implant increased significantly when the implant tilted 45 掳. Conclusion: the shape of dental arch has a significant effect on the stress distribution around the implant. When All-on-4 is used to repair maxillary dentition loss, the obliquity angle of the obliquity should be minimized, and the obliquity angle of the oval dental arch implant should not exceed 15 掳. The apical circular arch should avoid the inclination of implant over 30 掳.
【作者单位】： 吉林大学口腔医院种植中心;
【基金】：教育部高等学校博士学科点专项科研基金资助课题(20120061110077)
【分类号】：R783.4
[Abstract]:Objective: to explore the difference of stress distribution in three dental arch models when maxillary dentition was repaired with All-on-4 by using finite element method, and to provide objective parameters for clinical improvement of implant success rate. Methods: according to MBTTM arch template of 3M company, the finite element model of maxillary edentulous maxilla (cusp circle, square round and oval) was established with SolidWorks 2013 software, and the cortical bone layer was set up as 2 mm. The implant was 13mm in length, 2 implants in the anterior tooth region were parallel implanted, and 2 implants in the posterior tooth region were fixed in the upper structure at 4 angles of 0 掳, 15 掳, 30 掳and 45 掳along the proximal and distal direction of the maxilla. The masticatory force was simulated by applying 100N pressure to the superstructure under two loading modes. The Von-Mises stress of the implant in the maxillary model was measured by the finite element software Abaqus 6.13. Results: the stress values of Max von-Mises around the implant appeared in cortical bone layer. The stress distribution was different in different dental arch models. The stress around the implant increased with the increase of implant angle. The maximum stress value of the oval arch posterior region appeared when the implant tilted at 15 掳, the anterior tooth stress increased significantly after the implant tilted more than 15 掳, and the stress around the apical circular arch implant increased significantly when the implant tilted 45 掳. Conclusion: the shape of dental arch has a significant effect on the stress distribution around the implant. When All-on-4 is used to repair maxillary dentition loss, the obliquity angle of the obliquity should be minimized, and the obliquity angle of the oval dental arch implant should not exceed 15 掳. The apical circular arch should avoid the inclination of implant over 30 掳.
【作者单位】： 吉林大学口腔医院种植中心;
【基金】：教育部高等学校博士学科点专项科研基金资助课题(20120061110077)
【分类号】：R783.4
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