Many women will do a lot of preparations before pregnancy, one of the important preparations is oral examination, specifically the following items: Periodontitis After pregnancy, due to the change of hormone level, the permeability of blood vessels is enhanced, which may easily induce gingivitis or lead to the aggravation of the existing periodontitis, gums will appear hyperplasia, swelling, bleeding significantly, teeth may appear loose, etc. Tooth decay Pre-pregnancy physiological changes and changes in eating habits, as well as neglect of oral care, often aggravate the development of tooth decay. Once it develops into acute pulpitis or acute apical infection, it will not only bring unbearable pain to the pregnant woman, but also cause adverse effect to the fetus if the medicine is not taken carefully. The dangers of blocked wisdom teeth are described in detail in the previous article. If pericoronitis occurs during pregnancy, the duration of the disease is often very long and painful for the pregnant woman due to medication restrictions. On the other hand, wisdom teeth are often prone to decay due to inadequate cleaning, and once pulpitis occurs, the pain is often severe and unbearable. Therefore, it is recommended to have an oral examination and evaluation of wisdom teeth before pregnancy, and to remove the obstructed wisdom teeth if necessary. Oral hygiene This is a very critical point. All common oral diseases during pregnancy are closely related to oral hygiene. You need to know how to brush and floss properly, and when it is safe to have treatment if you have oral diseases during pregnancy, and other related knowledge.