How do you know it's a dead tooth? A single sitting root canal treatment is not recommended in a case of infection. However, two sittings are required. The cost of root canal treatment ranges from 2.5k-5k. the cap measurements can be taken on the first day itself if you're willing to reduce your appointment. But minimum of two sessions are required and the cap also can be placed in the second session. There are a variety of cap available. When you visit the dentist, they would show all the available ones and you can choose whichever you prefer.