|
tooth
→ had
→ root canal treatment
|
170
|
|
tooth
→ undergone
→ root canal treatment
|
66
|
|
tooth
→ had
→ a root canal treatment
|
49
|
|
tooth
→ be had
→ root canal treatment
|
29
|
|
tooth
→ had
→ root-canal treatment
|
23
|
|
tooth
→ had
→ root canal treatments
|
23
|
|
tooth
→ received
→ root canal treatment
|
21
|
|
tooth
→ receive
→ root canal treatment
|
15
|
|
tooth
→ undergone
→ a root canal treatment
|
12
|
|
tooth
→ be had
→ a root canal treatment
|
12
|
|
tooth
→ be undergone
→ root canal treatment
|
10
|
|
tooth
→ received
→ a root canal treatment
|
7
|
|
tooth
→ be undergone
→ a root canal treatment
|
4
|