Thanks everyone for writing. I will work with some of the things mentioned. I 
have been brushing with baking soda and sea salt and then rinsing with deluted 
hydrogen peroxide. Once in a while I put some oregano oil on it. This keeps any 
infection away. It is only the one tooth that has the problem. It is not loose 
or bleeding or infected but I have to be very careful. It has been receded for 
years (at least 12). Just now it is worse because it has progressed over the 
years. I guess I would like it to grow back!  
I will try the oil pulling and using the CS more. Might try adding the DSMO if 
I can get past the fear factor. I also will order some of the MMS. 
Paula