Plastic/wired Mouthpiece to Train Teeth

This page is the CodyCross answer for the clue below from Deserts of the world, Group 1615, Puzzle 3 (White Sands National Park).

Question is: Plastic/wired Mouthpiece to Train Teeth

and the answer is: RETAINER

Word Meaning:

RETAINER — Any thing or person that retains.

Definitions from Wiktionary.

Plastic/wired Mouthpiece To Train Teeth - Deserts of the world CodyCross Answers | CodyCross Solutions