Soo S, Leung T
Department of Prosthetic Dentistry, Eastman Dental Institute, London, United Kingdom.
J Prosthet Dent. 1996 Jun;75(6):622-5. doi: 10.1016/s0022-3913(96)90247-4.
The Hidden clasp system overcomes the problem of poor esthetics of partial denture clasps, but it is not known how well it works as a retainer. This study tested the retention of Hidden clasps compared with that of C clasps and I bars when they function as part of a tooth-supported partial denture framework. Nine standardized frameworks that incorporated one of the three clasp designs on a premolar abutment were tested on a laboratory model. Their retention was recorded on a tensile testing machine. Specimens carrying the Hidden clasp had the greatest variability in retention among the three groups. Statistically significant differences were found between the C clasp and I bar groups.
隐蔽卡环系统克服了局部义齿卡环美观性差的问题，但尚不清楚其作为固位体的效果如何。本研究测试了隐蔽卡环作为牙支持式局部义齿支架一部分时与C形卡环和I形杆相比的固位力。在实验室模型上测试了九个在双尖牙基牙上采用三种卡环设计之一的标准化支架。在拉伸试验机上记录它们的固位力。在三组中，带有隐蔽卡环的标本在固位力方面的变异性最大。在C形卡环组和I形杆组之间发现了统计学上的显著差异。
