Can low estrogen cause teeth to feel loose?

Never heard of it. Loose teeth is caused by periodontal ( gum) disease. If you have loose teeth need to see a dentist because gum disease is a silent disease and can only be detected by a health care provider.
See doctor. Talk to your doctor, if you experience the unexpected loss of a tooth or your tooth start to feel loose.Sufficient calcium intake can prevent this problem in the first place, as well as help guard against a whole host of problems.