Berg T, Caputo A A
University of California-Los Angeles, School of Dentistry.
J Prosthet Dent. 1992 Nov;68(5):784-9. doi: 10.1016/0022-3913(92)90203-m.
This study photoelastically compared the stress distribution characteristics of maxillary, bilateral, distal-extension removable partial dentures retained by light and heavy ERA extracoronal attachments. One prosthesis included supporting rests and the other had no rests. Both designs were tested with and without abutment splinting. The most favorable stress distributions were obtained with light retention elements, supporting rests, and splinting of the abutments. In this configuration the attachment prosthesis compared favorably in stress distribution with the maxillary I-bar retained removable partial denture in a previous study that used a comparable maxillae model.
本研究采用光弹性方法比较了采用轻型和重型ERA冠外附着体固位的上颌双侧远中游离可摘局部义齿的应力分布特征。一个修复体有支托，另一个没有支托。两种设计均在有无基牙夹板固定的情况下进行测试。采用轻型固位元件、支托和基牙夹板固定时，应力分布最为有利。在这种配置下，与先前一项使用类似上颌模型的研究中采用上颌I型杆固位的可摘局部义齿相比，附着体修复体在应力分布方面表现良好。
