Angie, the use of DMSO for the teeth is not published, but is available on a YouTube that Jim Humble did on abscesses.
The thing to keep in mind is that DMSO is a solvent/carrier, so it will literally carry anything it is on, into the tissues below. Normally, when we apply DMSO, we either drop it, or we spray it, on top of the MMS skin spray.
So, make up a batch of skin spray (10 drops activated MMS with 1 oz of distilled water) - keep this in a dark place (a bathroom cabinet or fridge are fine) (MMS is affected by UV rays) - and spray the areas with this, then either drop or spray the DMSO on top of it. You can rub it in with your finger - just no rubber gloves . A couple of drops will do it, and you can do it up to 4x a day - although, if you start having irritation drop back to less x a day or dilute your dmso to a 70/30 mixture (70% DMSO, 30% distilled water) -
Be sure, if you do it on an area like the back, that you have someone to help you spray and that you watch for irritation -
HTH, I'm sure others can chime in with their thoughts.