Effects of mucosal thickness on the stress distribution and denture stability of mandibular implant-supported overdentures with unsplinted attachments in vitro.
Effects of mucosal thickness on the stress distribution and denture stability of mandibular implant-supported overdentures with unsplinted attachments in vitro.
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DOI：
10.4061/2011/894395
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Koyano K
中科院分区：
文献类型：
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作者：
Haruta A;Matsushita Y;Tsukiyama Y;Sawae Y;Sakai N;Koyano K
本研究的目的是比较粘膜厚度对种植体周围的应力模式和移动的种植覆盖义齿与球/女性和三种不同类型的磁性附着体的影响。将两个牙根形种植体插入下颌模型后，在模型表面覆盖一层1.5或3 mm的印模材料，以模拟口腔粘膜，并在每个模型上制作可移动覆盖义齿。在右侧第一磨牙上施加50 N的垂直力，测量其应力分布和义齿移动。在1.5 mm粘膜模型中，磁性附着体的弯曲力矩显著低于球形附着体。磁性附着体的基托位移最低。在这项研究中，使用磁性附着体可能是有利的下颌种植覆盖义齿的基础上，更低的应力和更好的义齿稳定性，特别是在薄粘膜模型。
The aim of this study was to compare the effects of mucosal thickness on the stress pattern around implants and movement of implant-supported overdentures with ball/female and three different types of magnetic attachments. After insertion of two root-form implants into a mandibular model, the surface of the model was covered with a 1.5- or 3-mm layer of impression material to simulate the oral mucosa, and removable overdentures were fabricated on each model. A 50-N vertical force was applied to the right first molar, and the resultant stress distribution and denture movement were measured. In the 1.5-mm mucosal model, the magnetic attachments showed significantly lower bending moments than did the ball attachment. The denture base displacement was the lowest on a magnetic attachment. In this study, use of magnetic attachments could be advantageous for mandibular implant-supported overdentures based on lower stress and better denture stability especially in the thin mucosal model.