First of all, you need to prepare tools in advance before brushing your dog's teeth. The tools mainly include soft-bristled toothbrushes and pet-specific toothpaste. Squeeze the toothpaste on the toothbrush and slowly approach the dog, or wait for the dog to approach on its own. You can let your dog touch, smell and even lick it freely. After the dog becomes less wary of toothbrushes and toothpastes, the scavenger can gently pry open the dog's mouth with his hands to expose the gums and teeth.
After making sure that the dog will not resist excessively, let it expose its teeth, brush the teeth with a toothbrush in circular motions against the roots of the teeth, and clean the outer tooth surfaces and food residues between the teeth. The gaps between the inside of the teeth and the molar surfaces can be licked by the dog's tongue, so it is less likely to accumulate dirt, but care should be taken to clean them. If the dog already has tartar, the scavenger can soak a cotton swab in cold boiled water, squeeze toothpaste on it, and clean it up for the dog.
Remember to praise the dog when it is very cooperative or performs well. At this time, the pet dog will get a good psychological hint that it is good to do so, and it will be more willing to brush its teeth.
The dog may not be willing to brush his teeth because he is not used to it or feels scared. Be careful not to force it! This is because dogs are likely to have a stress response due to nervousness and fear. They will resist brushing their teeth and may close their mouth tightly to prevent others from inserting the toothbrush. If the dog bites the toothbrush, it may bite people in severe cases.