Aim: This in vitro study was done to evaluate the physical, chemical and biological properties of 4 brands of metal orthodontics brackets.
Objectives: To analyse the physical, chemical, composition, the corrosion resistances, nickel ion release and cytotoxicity of the orthodontics brackets.
Materials and Methods: 4 bracket were tested for dimensional accuracy of orthodontics brackets namely group-1: Gemini (3M Uniteck), group-2: Ecoplus (Chirpans orthodontics), group-3: Monalisa (JJ orthodontics), group-4: Sapphire (Modern orthodontics). Manufacturing errors in angulation and torque, cytotoxicity, composition, elution and corrosion.
Results: The tested rackets showed no signi icant difference in manufacturing errors in angulation, but sapphire brackets showed a signi icant difference in manufacturing errors in torque. Gemini brackets offered better corrosion resistances and showed the least nickel release among all the groups. Cytotoxicity tests showed that gemini is the least cytotoxic and ecoplus is the most cytotoxic.
Conclusion: The results of this study could potentially be applied in establishing national standards for orthodontic brackets and in commercially available products.
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