Across
- 3. Opposite of Extrinsic
- 4. Opposite of yellow
- 7. second common whitening agent
- 9. Opposite of gentle
- 10. Plastic whitening product
Down
- 1. Combine/chemically combined with oxygen
- 2. Keep up your dental __
- 5. first common whitening ingredient
- 6. Common ingredient in toothpaste
- 8. Opposite of alkaline