| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | canal system | Canada | Canal systems used for transportation and industrial development | 1 |
| 2 | canals | Canada | Found in limited regions due to climate and geography | 1 |
| 3 | root canal treatment | Canada | Root canal treatment is a standard procedure for saving a severely decayed tooth. | 1 |
| 4 | root canal treatment | Canada | Root canal treatment is a standard dental procedure and is commonly recommended to save a tooth with deep decay or infection. | 1 |