Metal or Plastic Used to Fix a Hole in a Tooth

This page is the CodyCross answer for the clue below from Amusement Park, Group 208, Puzzle 2 (Magic Moments).

Question is: Metal or Plastic Used to Fix a Hole in a Tooth

and the answer is: FILLING

Word Meaning:

FILLING — present participle and gerund of fill

Definitions from Wiktionary.