Lucchese Alessandra, Manuelli Maurizio, Ciuffreda Claudio, Albertini Paolo, Gherlone Enrico, Perillo Letizia
Department of Orthodontics, Vita Salute San Raffaele University, Milano, Italy.
Unit of Dentistry, Division of Orthodontics, Research Area in Dentofacial Orthopedics and Orthodontics, IRCCS San Raffaele Scientific Institute, Milano, Italy.
Korean J Orthod. 2018 Mar;48(2):107-112. doi: 10.4041/kjod.2018.48.2.107. Epub 2018 Feb 6.
The aim of this study was to examine the properties of fiber-reinforced composite and stainless steel twisted retainers for orthodontic retention.
Three different span lengths (5.0, 8.0, and 14.0 mm) of fiber-reinforced composite were investigated. The three fiber-reinforced composite retainer groups were subdivided according to the storage condition (dry and wet), resulting in a total of six groups. Each stainless steel and fiber-reinforced composite group was comprised of six specimens. The three-point bending flexural test was conducted using a universal testing machine. ANOVA was used to assess differences in the maximum load and maximum stress according to the span length, material, and storage condition. comparisons were performed if necessary.
The maximum stress and maximum load were significantly ( < 0.001) associated with the span length, material, and storage condition. The significant interaction between the material and span length ( < 0.001) indicated the differential effects of the material for each span length on the maximum stress and maximum load, with the difference between materials being the highest for the maximum span length.
Our findings suggest that fiber-reinforced composite retainers may be an effective alternative for orthodontic retention in patients with esthetic concerns or allergy to conventional stainless steel wires.
本研究旨在探讨纤维增强复合材料和不锈钢麻花丝正畸保持器的性能。
研究了三种不同跨度长度（5.０、8.０和14.０毫米）的纤维增强复合材料。根据储存条件（干燥和潮湿）将三个纤维增强复合材料保持器组再细分，共得到六个组。每个不锈钢和纤维增强复合材料组由六个样本组成。使用万能试验机进行三点弯曲挠曲试验。采用方差分析来评估根据跨度长度、材料和储存条件在最大载荷和最大应力方面的差异。如有必要进行多重比较。
最大应力和最大载荷与跨度长度、材料和储存条件显著相关（Ｐ＜０.００１）。材料和跨度长度之间的显著交互作用（Ｐ＜０.００１）表明每种跨度长度的材料对最大应力和最大载荷的不同影响，材料之间的差异在最大跨度长度时最为明显。
我们的研究结果表明，对于在意美观或对传统不锈钢丝过敏的患者，纤维增强复合材料保持器可能是正畸保持的一种有效替代方案。
