to be clear: if you were to inject a calcium blocker in your arm, it would remove calcium from your blood, which would lower your blood pressure - and seems to often have the side-effect of gingival overgrowth.

injecting edta seems likely to actually kill you, although it seems to be used in small doses to clear the body of metal like lead. it might act as a calcium blocker in that context, by clearing the blood of calcium, if it doesn't give you a stroke first by calcifying it out.

but, if you put a collagenase inhibitor like edta on your teeth, it should pull the calcium out and leave your tooth a mushy mess of phosphate and whatever else has been uptaken into them.

so, if i'm going to use a collagenase inhibitor topically, i need to make sure it's not a chelating agent, as most of them seem to be, because it will just dissolve the metals in your mouth (calcium is technically a metal, kids) like a powerful acid.

this is making more sense as i'm reading more, but it's not helping me develop usable answers.