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read this link for an explanation of bone cell activity: https://support.clearcorrect.com/hc/en-us/articles/203836908-Osteoclastic-and-Osteoblastic-Activity
The very worst side-effect from this med is having you jaw bone die. If that happens you lose your teeth. You can avoid this side-effect by being off the med for at least one month before having any kind of dental work - and that includes even having your teeth cleaned. Then you have to stay off the med for several months after the dental work.
I don't believe this med does anything to the cancer cells as such, but might be wrong about that. Talk to the oncologist about when to not or to have dental work done before you go to the dentist. Be sure to tell the dentist that you have been taking Zometa and get his take on how long you should hold the med before restarting it.
take GOoD care