Lingual braces are exactly the same as the conventional braces that are placed on the visible surfaces of your teeth and have the same components as conventional braces but they are fixed onto the back surface of your upper and lower teeth ie, palate side of upper teeth and tongue side of lower teeth.

Because they’re behind your teeth, they’re nearly invisible.

Pros

Not visible so more esthetic compared to conventional braces.

Cons

Speech difficulty until you adjust to the braces as the tongue touches the braces during speech and other movements.
Brackets may dislodge more frequently