The aim of this study was to compare the effects of mucosal thickness on the stress pattern around implants and movement of\r\nimplant-supported overdentures with ball/female and three different types of magnetic attachments. After insertion of two rootform\r\nimplants into a mandibular model, the surface of the model was covered with a 1.5- or 3-mm layer of impression material\r\nto simulate the oral mucosa, and removable overdentures were fabricated on each model. A 50-N vertical force was applied to the\r\nright first molar, and the resultant stress distribution and denture movement were measured. In the 1.5-mm mucosal model, the\r\nmagnetic attachments showed significantly lower bending moments than did the ball attachment. The denture base displacement\r\nwas the lowest on a magnetic attachment. In this study, use of magnetic attachments could be advantageous for mandibular\r\nimplant-supported overdentures based on lower stress and better denture stability especially in the thin mucosalmodel.
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