Comparison of the friction resistance of 3D-printed polyurethane orthodontic brackets with and without zirconium oxide nanoparticles with conventional metal and ceramic brackets: An in vitro study - 01/04/25
, Dilip Srinivasan, Ravi Kannan, Devasahayam DavisSummary |
Aim |
To compare the frictional resistance of 3D-printed zirconium oxide nanoparticles reinforced polyurethane orthodontic brackets, 3D-printed Polyurethane orthodontic brackets, conventional metal and ceramic brackets in an in vitro environment.
Methods |
Stereolithography was used to 3D print the polymer orthodontic brackets and zirconium oxide-reinforced polymer orthodontic brackets. Conventional metal brackets and conventional ceramic brackets were used as controls. The frictional force between the bracket and the archwire was measured under dry conditions with an Instron universal testing machine with a sliding velocity of 1mm/minute and a load cell of 50N. The Kruskal-Wallis test with post hoc test (Mann-Whitney U test) was used for statistical analyses (significance level P<0.05).
Results |
There is no significant difference observed between 3D-printed zirconium oxide-reinforced polymer orthodontic brackets and 3D-printed polymer orthodontic brackets. The frictional resistance was found to be the least in 3D-printed polyurethane brackets (1.3895+0.72583N), followed by 3D-printed zirconium oxide-reinforced polyurethane brackets (2.15+0.75683N), conventional metal brackets (2.348+0.82682N), and it was highest in conventional ceramic brackets (4.9675+0.88519N).
Conclusions |
The incorporation of zirconium oxide nanoparticles increased the frictional resistance of 3D-printed polymer orthodontic brackets, but it was not statistically significant. Hence, zirconium oxide nanoparticles could be considered as a better reinforcement for polymer brackets for enhanced clinical utility.
Le texte complet de cet article est disponible en PDF.Keywords : Polymers, Orthodontic appliance design, 3D-printed brackets, Surface properties, Polyurethane, Zirconium oxide reinforcement, Mechanical properties, Sliding resistance
Plan
Vol 23 - N° 3
Article 101001- septembre 2025 Retour au numéro
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