A belt or braces (suspenders in American).
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he got them off.
The guy from American Pie. The Shremenator.
He always has a kind word for everyone. She has freckles. Mary has braces. John has a new car.
Susan had to be put into braces due to her weak knees.
Usually, retainers are used after braces are removed to "retain" the effect of the braces. It is like weaning the braces off the teeth. What does the word retainer mean? Exactly, to retain.
Lingual braces are placed on the back side of your teeth. So, they are called as hidden braces. From: http://bracesprices.net/lingual-braces/lingual-braces-go-unnoticed/
Braces
Braces?, you cant.
No, he does not have braces.
You can get invisible braces or white elastics might work. But other than invisible braces you CAN'T hide braces.