I can vouch from personal experience that yes, chemo and post-treatment meds reak havoc on your teeth; breaking down enamel; making them weak and suspectible to chips, cracks, etc; and making it hard to find dentist to perform work on them instead of pulling them as a solution.  What's worse is most (if not all) health insurance provider's won't cover dental issues caused by disease and medication, but they will cover (up to $1000, such as my ins.) for a wig, due to loss from cancer  - Well I'd much rather be bald and have teeth than the other way around! We need to stand up to our ins. companies and fight for better coverage and let them know the true side effects and dangers of chemotherapy drugs and what they do to our bodies. Good luck to you! Angi