Caries and periodontal disease are chronic non-communicable diseases of the oral cavity identified by the World Health Organization, and are the most important causes of tooth loss. How to prevent caries (tooth decay) and periodontal disease? The most important thing is to have regular oral examination. If a tooth has a deep sulcus, get a sulcus seal or a preventive filling to prevent tooth decay. If there is a small hole in the tooth, fill it as soon as possible, don’t wait until it hurts and then go to the dentist, it will be too late and the tooth will need root canal treatment, which will not only take 3 or 4 times, but also increase the cost several times, and in serious cases, the tooth will be extracted. Regular oral examination is also an effective means to prevent and treat periodontal disease. Plaque is the initiating factor of periodontal disease, and dental calculus, especially subgingival calculus, is the culprit of alveolar bone resorption, so regular oral examination and regular dental cleaning can effectively maintain and keep periodontal tissue health. So don’t ever think that scaling causes loose teeth, this misconception must be corrected. It is recommended that you have an oral examination once every six months or at least once a year, and I hope that you will all have a healthy set of teeth!