Reitz P V, Caputo A A
J Prosthet Dent. 1985 Aug;54(2):220-5. doi: 10.1016/0022-3913(85)90292-6.
This investigation evaluated the stress patterns in a photoelastic model produced by three different mandibular major connectors. The results were as follows. There were minimal differences in stress generated by the rigid and the short split frameworks. When the split extended to the midline, the stress on the distal-extension abutment was in a more vertical direction and decreased in magnitude. The stress in the edentulous portion of the distal-extension side was increased with the long split when force was applied. When force was applied to the tooth-supported side of the removable partial denture, the difference in stress among the three frameworks was insignificant. The long split major connector is a viable, inexpensive alternative to manufactured stress breakers for distal-extension removable partial dentures.
本研究评估了由三种不同下颌主连接体产生的光弹性模型中的应力模式。结果如下。刚性和短裂框架产生的应力差异极小。当裂缝延伸至中线时，远中延伸基牙上的应力方向更垂直，且大小减小。当施加力时，长裂导致远中延伸侧无牙区的应力增加。当对可摘局部义齿的牙支持侧施加力时，三种框架之间的应力差异不显著。对于远中延伸可摘局部义齿，长裂主连接体是一种可行、廉价的替代成品应力中断器的选择。
