The good thing about using a crevice brush is that it can clean the crevices of your teeth of debris and bacteria inside the crevices of your teeth that a regular toothbrush can’t reach. The disadvantage of using a gap brush is that if it is used incorrectly, it can damage the gums or increase the size of the gaps in the teeth. Ordinary toothbrushes can’t clean deep into the crevices of the teeth and leave a lot of food residue, which may cause gingivitis and gum recession in the long run. A crevice brush can be used as a supplement to a regular toothbrush to clean out the food debris and bacteria in the crevices that a regular toothbrush can’t normally clean out. Using a crevice brush is a relatively common method of cleaning teeth, but in the process of using the incorrect operation method, there may be gum damage, accompanied by localized swelling and pain, and prolonged use of the crevices will also appear to be getting bigger and bigger. Consult your healthcare professional for advice on specific usage.