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.