Brushing is a very broad term, just like reading, not everyone who reads can get into Peking University and Tsinghua University. Even though everyone is brushing their teeth, there must still be a question of how well they are brushing their teeth. The only way to improve the effectiveness of brushing is to check it yourself. Just like reading requires constant review by yourself, brush your teeth and look in the mirror to see if there are any areas that you have brushed, and brush more carefully where there is tartar. One of the doubts is that some people have white teeth, but it doesn’t necessarily mean that she or he brushes her teeth carefully. Yes, just like studying, some people are highly gifted and play every day, but they can still get into Peking University and Tsinghua University, right? People are different, and we can only work from ourselves if we want to achieve better results. This is beneficial and harmless. When reading we have teachers, the role of the teacher is to solve the problem. Those problems that lie in your difficulty to solve have to ask the teacher for help. The same is true for oral hygiene. Tartar that is already present is difficult to brush off with a toothbrush. There are special locations such as crowded areas of teeth that are difficult to reach with a toothbrush. This is where you need to go to the doctor. The role of a doctor is the same as getting a teacher to tutor you when you are studying. Students are very smart, the teacher can push a push to get into the University of Peking and Tsinghua, students with average natural talent, the teacher is very important. Students who are not gifted to get into Peking University and Tsinghua University, that the teacher put in no less effort than the students. If you have periodontitis or a serious periodontitis, of course, their own serious brushing is still very important (they do not learn, the teacher again with the effort is also futile), a good specialist is also essential. If it is a simple gingivitis itself, it is OK to brush your own teeth carefully.