My belief is that you're not keeping the MMS + DMSO solution in your mouth long enough. It probably takes several minutes for adequate amounts of the solution to penetrate through the gum tissue, and get at the bacterial infection beneath the tooth. It takes awhile to kill 100% of a bacterial colony, and they can repopulate quickly. So you would probably benefit from using the MMS + DMSO solution as a mouthwash, swish it around in your mouth for several minutes each time, and do this every 2 or 3 hours throughout the day.
The bacteria you are fighting may be repopulating faster than you can kill them off. These bacteria thrive on refined sugar and grain, so anything containing sugar or is made from flour should be eliminated from your diet for the time being.
Wild animals do not suffer from gum disease, cavities or tooth decay - yet they don't brush their teeth or floss. And they have about the same kinds of bacteria in their mouths that we do. Those bacteria are intended to be there by nature, to serve the purpose of keeping the mouth clean from debris and also the initiate the digestive process. The reason wild animals have perfect oral health and humans do not is because the animals eat the food that nature intended, while humans eat everything but what nature intended. Wild animals don't eat refined sugar, they don't eat grain, and they don't eat cooked food. If we humans ate only what nature intended, which is raw vegetables and fruits, nuts, seeds, berries and freshly killed raw meat and eggs - we also would have perfect oral health.
Good oral health requires at least 500 different types of bacteria in the mouth. This is intended by nature, and these "aerobic" bacteria do only good and beneficial things. The problems begin when we eat refined sugar or grain, which attract a type of bacteria into the mouth which is "anaerobic." These anaerobic bacteria not only eat the residue of the sugar and the grain, but they also eat away at the gum tissue, and the teeth and bone tissue below the gum line. The only way to keep these destructive bacteria out of your mouth is to stop eating sugar and grain.
Now, wild animals produce their own Vitamin C internally and automatically. However much Vitamin C they need - that's how much their bodies produce. Vitamin C is one of nature's most powerful anti-microbials. So if per chance a destructive bacteria colony would start developing in the mouth of a wild animal, it would automatically produce enough Vitamin C to kill off the infection. We humans are different in that we can't produce our own Vitamin C, and must get what we need from our diet. Since Vitamin C comes mostly from eating raw vegetables such as kale, spinach, broccoli, cabbage and that sort of thing - most humans are chronically deficient in Vitamin C.
Vitamin K2 is critically, vitally important to good oral health. K2 is essential for the remineralization of the teeth, and it also kills the anaerobic bacteria which cause gum disease and tooth infections. Because they eat a raw food diet, wild animals produce all the Vitamin K2 they need - which is accomplished by bacteria in their gut. Because we humans eat cooked food, the natural process of converting K1 to K2 in the human gut is very inefficient - and so we must get the K2 we need from the food we eat. Of course, most people have never heard of Vitamin K2, have no idea which foods contain it, and thus most people are chronically deficient in K2.
Many people visit their dentist twice each year to get their "teeth cleaned." Why? Wild animals don't need to get their teeth cleaned. Tartar is a calcium deposit which forms along the gum line - and it seems that no amount of brushing or flossing can prevent it. So what causes the formation of this tartar? Well, your body knows to put calcium into your saliva for the purpose of building new tooth enamal and filling in any cavities which may have formed. But in the absence of Vitamin K2, the mechanism for proper use of the calcium breaks down - and so the calcium become a waste product which the body has no way to dispose of, and so it forms tartar.
In summary, humans get gum disease because they eat refined sugar and grain - which attracts a special type of anaerobic, destructive bacteria into their mouths. The Vitamin C and Vitamin K2 which could kill this damaging bacteria is chronically deficient from the diet - so the "bad' bacteria grows out of control and the acids they produce eat into the gum tissue and causes infection. Most cases of tooth loss result from gum disease.
The development of cavities are a different matter, and usually result from mineral deficiencies in the diet. Teeth are living tissue, and are capable of repairing themselves to some extent. Teeth are made from the minerals calcium, phosphorus, magnesium, zinc, boron, silica, strontium. Most people are chronically deficient in magnesium, which has hundreds of vital functions in the body. For example, magnesium is essential for regulating the rate of heart beat - and the body gives this a higher priority than maintaining healthy teeth. So if a person is deficient in magnesium, the body may pull magnesium out of the teeth and send it through the bloodstream to the heart. But the consequence of that is development of a hole in the tooth. Assuming the mineral deficiencies have been corrected, Vitamin K2 is the key ingredient for remineralization of the teeth. But adequate amounts of Vitamin D, Vitamin C, Vitamin A are also important.
Glycerin is a chemical put into commercial toothpaste, which makes the teeth slick and slippery - which keeps plaque from sticking to the teeth, and so they feel nice and clean for a long time. However, glycerin also prevents calcium and other minerals from penetrating into the tooth surface so new enamel can be built. Fluoride makes teeth harder, but also brittle and more prone to chipping and breaking off. Fluoride also prevents the teeth from remineralizing. Brushing with commercial toothpaste brings profits to the profession of dentistry, but it destroys your teeth. It is better to brush with a soft brush and plain water than commercial toothpaste, followed by a saltwater rinse to kill bacteria. Brushing with a solution of MMS1 will kill bacteria better, and contribute to whitening the teeth. Brushing with a paste made from calcium ascorbate powder and water gets both Vitamin C and calcium into the saliva, which of course is beneficial to the teeth and gums.