Metal braces can irritate gums and cheeks at first. Once you have them on, you have to watch what you eat, avoiding things that can stick to the braces, such as caramel or gum. You also have to avoid eating hard foods, which can move or dislodge the braces.
Ceramic braces are more sensitive and can easily break or chip. They require more maintenance and more time to install than metal braces, which increases overall treatment time and cost.
Lingual braces don't work well on small teeth and get in the way of the tongue, potentially causing speech problems and injuries, so you have to learn and practice speaking with them on.
Invisalign consists of a series of 18 to 30 custom-made, mouth guard-like clear plastic aligners. The aligners are removable and are replaced every 2 weeks.