I haven't been to the dentist in a year and I know that I have cavities between several teeth because I can see them. 2 teeth are very slightly sensitive, but not to hot or cold. I have a dentist appointment in 5 weeks (due to insurance reasons) and I plan to get them filled then. I do brush and floss my teeth, but I also consume soft drinks regularly. I have stopped that habit recently though. What are the odds of me needing a root canal? Will my cavities be deep?