Grades of protection
| Grade | Feature |
|---|---|
| 10 | Ultimate aim: grades 8 and 9 combined |
| 9 | Passed effective instrumented test to evaluate mouthguards |
| 8 | Custom made mouthguard using improved design and materials |
| 7 | Custom made mouthguard using improved materials |
| 6 | Brand new custom made mouthguard |
| 5 | Custom made mouthguard of insufficient thickness |
| 4 | Old custom made mouthguard, 2–5 years old |
| 3 | Old custom made mouthguard, >5 years old |
| 2 | Boil and bite mouthguard |
| 1 | Stock mouthguard |
| 0 | No mouthguard |