This question is more dental, i have a few really bad teeth. recently i have been drinking alkiline water. is it safe for my bad teeth?

Beware: "really bad" teeth usually means rampant decay--the result of acid dissolving of the teeth by dietary, gastric reflux and/or bacterial conversion of sugars into acid. Unfortunately, lemon water is the most common alkaline water as it promotes an alkaline environment after digestion. But while in the glass and the mouth, citric acid is highly acidic and destructive to the teeth. Lemonade is worse!

No: Just drink normal water which is going to have ph of 6-8. We know acidity is horrible for enamel, but it is quite likely that alkalinity beyond 8 isn't healthy either, despite what you may see on the internet. I recommend taking care of those bad teeth before you are awakened unexpectedly at 2 am in the morning with pain and swelling.