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Chemical analysis and Vickers hardness of orthodontic mini-implants
Feitoza, Christiane Cavalcante; Guilherme José Pimentel Lopes, de Oliveira; Consani, Rafael Leonardo Xediek; Boeck, Eloisa Marcantonio; Dela Coleta Pizzol, Karina Eiras & Lunardi, Nadia
Abstract
Orthodontic mini-implants are used in clinical practice to provide efficient and aesthetically-pleasing
anchorage. Aim: To evaluate the hardness (Vickers hardness) and chemical composition of miniimplant
titanium alloys from five commercial brands. Methods: Thirty self-drilling mini-implants, six
each from the following commercial brands, were used: Neodent (NEO), Morelli (MOR), Sin
(SIN), Conexão (CON), and Rocky Mountain (RMO). The hardness and chemical composition
of the titanium alloys were performed by the Vickers hardness test and energy dispersive X-ray
spectroscopy, respectively. Results: Vickers hardness was significantly higher in SIN implants
than in NEO, MOR, and CON implants. Similarly, VH was significantly higher in RMO implants than
in MOR and NEO ones. In addition, VH was higher in CON implants than in NEO ones. There
were no significant differences in the proportions of titanium and aluminum in the mini-implant alloy
of the five commercial brands. Conversely, the proportion of vanadium differed significantly between
CON and MOR/NEO implants. Conclusions: Mini-implants of different brands presented distinct
properties of hardness and composition of the alloy.
Keywords
orthodontics; dental materials; hardness
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