Hi @janflute. Reclast and Fosamax are both osteoporosis medications classified as Bisphosphonates. Fosamax is taken in pill form, while Reclast is an injectable.
Here is a comparison chart for both from Drugs.com where you can see them side by side:
https://www.drugs.com/compare/fosamax-vs-reclast
There have been reports of some people who take Fosamax, Reclast, etc., having developed a serious condition called osteonecrosis of the jaw, a condition in which bone tissue in the jaw dies, causing pain and the possible collapse of the jaw bone. This is why elective dental work is not recommended while on these medications.

However, it’s rare and the risk of osteonecrosis of the jaw is greater in patients who have received chemotherapy, radiation, or steroids. As a side note, it doesn’t mean the entire jaw is affected. This is generally localized to the area of treatment such as an extraction site. It can be treated and corrected.

It’s always best to discuss any dental treatment with your physician and dentist before undergoing anything invasive such as extractions and implants. They’ll come up with a plan to help avoid issues.

There shouldn’t be any issue with your current root canals, implanted tooth or fillings/crowns. The only consideration is keeping the bone strong to support your teeth. As with anything you have to weigh the risk vs reward.
I know this is a tough decision to make so best wishes going forward.

I just noticed another conversation in the forum regarding Reclast that you might be interested in joining…have you seen this one?
https://connect.mayoclinic.org/discussion/reclast-infusion/