Clean teeth and healthy gums are essential requirements for a fit cat.
In fact, these animals often suffer from acute gingivitis which could lead to tooth loss.
There are also some tartar kibble that may be useful. These should be mixed with your daily food ration.
Toothpaste and toothbrush
The advice for brushing your cat's teeth is to use pastes based on specific dental cleaners to put on the gums without brushing.
For obvious reasons, the use of the toothbrush is more theoretical than practical, which does not mean that it is worth trying, as long as the cat agrees.