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Fiber reinforced composites orthodontic retainers
A Lucchese1, M Manuelli, L Bassani
1Department of Orthodontics, Dental School, Vita‑Salute San Raffaele University, Milan, Italy - lucchese.alessandra@hsr.it.
Minerva Stomatologica
|October 22, 2015
Summary
Fiber-reinforced composites (FRC) show promise as orthodontic retainers. Short impregnation times (6 seconds) reduce defects, while longer times (6 minutes) enhance fiber morphology for improved durability.
Area of Science:
- Dental Materials Science
- Orthodontic Technology
Background:
- Orthodontic retention aims to maintain teeth alignment post-treatment.
- Conventional stainless steel wires are standard but have limitations.
- Fiber-reinforced composites (FRC) offer a potential alternative for orthodontic retainers.
Purpose of the Study:
- To evaluate fiber-reinforced composites (FRC) as an alternative to stainless steel orthodontic retainers.
- To analyze the structural characteristics of FRC retainers using Scanning Electron Microscopy (SEM).
Main Methods:
- Two types of FRC retainers (Everstick® and Ribbond®) were tested.
- Samples were divided into control and resin-impregnated groups (6 seconds and 6 minutes).
- SEM analysis examined fiber structure, dimensions, and orientation before and after resin impregnation.
Main Results:
- Unimpregnated fibers showed interwoven and straight cylindrical structures.
- SEM revealed differences in fiber dimensions, number, diameter, and orientation between the two FRC types.
- Preliminary resin impregnation significantly altered FRC structural characteristics.
Conclusions:
- A 6-second resin impregnation minimized voids, crazes, and microcracks, enhancing resistance to oral factors.
- Extended impregnation (6 minutes) further improved the morphological characteristics of FRC retainers.
- Optimized resin impregnation is crucial for FRC retainer performance and durability.
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