Fixed orthodontic appliances are made of various materials. They can be made of nickel and titanium alloy (so called metal). Their mechanical characteristics are perfect. Effect and safety are brought to the highest level. Their only defect is aesthetic effect.
Fixed appliances can also be made of some aesthetic materials such as polycarboxylate, ceramics and sapphire glass. They have an extraordinary aesthetic effect. They are contraindicated only in careless patients with bad oral hygiene.