Chemical and physical properties of nickel-free brackets: An in vitro and ex vivo controlled clinical trial

Key Points

• Corrosion was observed in both metallic and nickel-free brackets due to the oral environment.
• No dimensional changes were noted after the use of nickel-free brackets in participants.
• Metallic brackets did not exhibit rougher surfaces compared to nickel-free ones during the study.
• The findings raise concerns about the durability of nickel-free brackets in clinical settings.