Menicucci G, Lorenzetti M, Pera P, Preti G
Department of Prosthodontics, University of Turin, Italy.
Int J Oral Maxillofac Implants. 1998 May-Jun;13(3):369-76.
Transmission of masticatory load in mandibular implant-retained overdentures was evaluated using a three-dimensional finite element model. The reaction forces on the distal edentulous mucosa and the stress on the perimplant bone were compared in overdentures retained either by two ball attachments or by two clips on a bar connecting two implants. In the finite element model, a 35 N load on the first mandibular molar induced a greater reaction force on the distal edentulous ridge mucosa of the nonworking side when the overdenture was anchored by ball attachments than with the clips/bar attachment. Stress on peri-implant bone was greater with the clips/bar attachment than with the ball attachment.
使用三维有限元模型评估下颌种植覆盖义齿中咀嚼负荷的传递。比较了通过两个球帽附着体或连接两个种植体的杆上的两个夹子固位的覆盖义齿中，远中无牙区黏膜上的反作用力和种植体周围骨组织的应力。在有限元模型中，当下颌第一磨牙上施加35N负荷时，与夹子/杆附着体固位的覆盖义齿相比，球帽附着体固位的覆盖义齿在非工作侧远中无牙嵴黏膜上产生更大的反作用力。夹子/杆附着体固位时种植体周围骨组织的应力大于球帽附着体固位时。
