Department of Prosthodontics, University of Cumhuriyet, Faculty of Dentistry, Sivas, Turkey.
J Prosthet Dent. 2011 Mar;105(3):203-7. doi: 10.1016/S0022-3913(11)60031-0.
Rare earth magnets have been used in prosthodontics, but their tendency for corrosion in the oral cavity and insufficient attractive forces limit long-term clinical application.
The purpose of this study was to evaluate the attractive force of different types of new-generation magnetic attachment systems.
The attractive force of the neodymium-iron-boron (Nd-Fe-B) and samarium-cobalt (Sm-Co) magnetic attachment systems, including closed-field (Hilop and Hicorex) and open-field (Dyna and Steco) systems, was measured in a universal testing machine (n=5). The data were statistically evaluated with 1-way ANOVA and post hoc Tukey-Kramer multiple comparison test (α=.05).
The closed-field systems exhibited greater (P<.001) attractive force than the open-field systems. Moreover, there was a statistically significant difference in attractive force between Nd-Fe-B and Sm-Co magnets (P<.001). The strongest attractive force was found with the Hilop system (9.2 N), and the lowest force was found with the Steco system (2.3 N).
The new generation of Nd-Fe-B closed-field magnets, along with improved technology, provides sufficient denture retention for clinical application.
稀土磁铁已在修复学中得到应用，但它们在口腔中的腐蚀倾向和不足的吸引力限制了长期的临床应用。
本研究旨在评估新一代磁性附着体系统的吸引力。
在万能试验机上测量了钕铁硼（Nd-Fe-B）和钐钴（Sm-Co）磁性附着体系统（包括闭路（Hilop 和 Hicorex）和开路（Dyna 和 Steco）系统）的吸引力（n=5）。使用单向方差分析和事后 Tukey-Kramer 多重比较检验（α=.05）对数据进行了统计学评估。
闭路系统表现出比开路系统更大的（P<.001）吸引力。此外，Nd-Fe-B 和 Sm-Co 磁铁之间的吸引力存在统计学上的显著差异（P<.001）。Hilop 系统的吸引力最强（9.2 N），Steco 系统的吸引力最弱（2.3 N）。
新一代 Nd-Fe-B 闭路磁铁，结合改进的技术，为临床应用提供了足够的义齿固位力。
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