Bending properties of fiber-reinforced composites retainers bonded with spot-composite coverage
: Sfondrini Maria Francesca, Gandini Paola, Tessera Paola, Vallittu Pekka K, Lassila Lippo, Scribante Andrea
Publisher: HINDAWI LTD
: 2017
: BioMed Research International
: BIOMED RESEARCH INTERNATIONAL
: BIOMED RES INT
: ARTN 8469090
: 2017
: 6
: 2314-6133
: 2314-6141
DOI: https://doi.org/10.1155/2017/8469090
: https://www.hindawi.com/journals/bmri/2017/8469090/abs/
: https://research.utu.fi/converis/portal/detail/Publication/27235967
Orthodontic and periodontal splints are prepared with round or flat metallic wires. As these devices cannot be used in patients with allergy to metals or with aesthetic demands, fiber-reinforced composite (FRC) retainers have been introduced. Stiffness of FRC materials could reduce physiologic tooth movement. In order to lower rigidity of conventional FRC retainers, a modified construction technique that provided a partial (spot) composite coverage of the fiber has been tested and compared with metallic splints and full-bonded FRCs. Flat (Bond-a-Braid, Reliance Orthodontic Products) and round (Penta-one 0155, Masel Orthodontics) stainless steel splints, conventional FRC splints, and experimental spot-bonded FRC retainers (Everstick Ortho, StickTech) were investigated. The strength to bend the retainers at 0.1mm deflection and at maximum load was measured with a modified Frasaco model. No significant differences were reported among load values of stainless steel wires and experimental spot-bonded FRC retainers at 0.1mm deflection. Higher strength values were recoded for conventional full-bonded FRCs. At maximum load no significant differences were reported between metallic splints (flat and round) and experimental spot-bonded FRCs, and no significant differences were reported between spot-and full-bonded FRC splints. These results encourage further tests in order to evaluate clinical applications of experimental spot-bonded FRC retainers.
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