Author/Authors :
Hu, Fengling Department of Stomatology - The Fifth People’s Hospital of Shanghai - Fudan University - Heqing Road - Shanghai, China , Gong, Yiming Department of Stomatology - Zhongshan Hospital of Fudan University - Fenglin Road - Shanghai, China , Bian, Zhen Department of Stomatology - The Fifth People’s Hospital of Shanghai - Fudan University - Heqing Road - Shanghai, China , Zhang, Xiaoying Department of Stomatology - The Fifth People’s Hospital of Shanghai - Fudan University - Heqing Road - Shanghai, China , Xu, Bin Department of Stomatology - The Fifth People’s Hospital of Shanghai - Fudan University - Heqing Road - Shanghai, China , Zhang, Jianguo School of Mechanical Engineering - Shanghai Institute of Technology - Haiquan Road - Shanghai, China , Shi, Xiaojun Department of Stomatology - The Fifth People’s Hospital of Shanghai - Fudan University - Heqing Road - Shanghai, China , Yu, Youcheng Department of Stomatology - Zhongshan Hospital of Fudan University - Fenglin Road - Shanghai, China , Song, Liang Department of Stomatology - The Fifth People’s Hospital of Shanghai - Fudan University - Heqing Road - Shanghai, China
Abstract :
Two-implant-retained mandibular overdentures with magnetic attachments can provide an effective treatment modality for
edentulous patients. In this study, a three-dimensional finite element analysis was used to compare the biomechanical characteristics of three different types of magnetic attachments in two-implant-retained mandibular overdentures. Flat-type, dometype, and cushion-type of the magnetic attachments were designed to retain the overdenture. Four types of load were applied to
the overdenture in each model: 100 N vertical and oblique loads on the right first molar and a 100 N vertical load on the right
canine and the lower incisors. .e biomechanical behaviors of peri-implant bone, abutment, and mucosa were recorded. In
vertical incisors, vertical right canine, and oblique molar loading condition, the flat-type group exhibited the highest levels of
maximum equivalent strain/stress in the peri-implant bone. The total deformation of mucosa and the maximum equivalent strain/
stress in the oblique molar loading condition are about two times as the vertical molar loading condition. These results suggested
that both cushion-type and dome-type of the magnetic attachments are better choices in two-implant-retained mandibular
overdentures, and oblique loading is more harmful than vertical loading.
Keywords :
Types , Two-Implant-Supported , Attachments , 100 N
