The importance of oral and dental health There are many harmless bacteria in the mouth, which are under the control of the immune system, and the person’s follow-up to oral and dental hygiene, so diseases that weaken the immune system such as human immunodeficiency syndrome (AIDS) with neglect of oral health make bacteria multiply greatly, causing Severe gum disease, and saliva helps neutralize the acidic environment caused by bacteria and wash food away from the teeth. Therefore, some types of medications such as antihistamines, diuretics, and antidepressants may The amount of saliva secreted in the mouth decreases, which increases gum disease and tooth decay.[1] Diseases and poor oral and dental health. Poor oral and dental health is associated with many health problems, including the following:[2] Pulmonary infection: Oral bacteria are transmitted as a result of infections of the gums and teeth. Through inhalation into the lungs, causing some diseases; Such as pneumonia, chronic obstructive pulmonary disease (COPD), and acute bronchitis. Heart diseases: the bacteria responsible for inflammation of the connective tissues of the teeth lead to atherosclerosis in the event that they move from the mouth through the bloodstream, and this results in a number of complications; Such as a heart attack, high blood pressure, and endocarditis. Pregnancy complications: Preparing for pregnancy requires good oral health, because hormonal changes during pregnancy increase the severity of infections of the gums and connective tissues, which may cause premature birth, and a decrease in the weight of the fetus. Diabetes: Diabetics are advised to take great care of the mouth and teeth, because gum infection increases the level of sugar in the blood, which is basically high in diabetics, which makes it difficult to control the symptoms and complications of the disease. Kidney disease: Neglecting oral health may lead to kidney disease, as a result of weak immunity in people with gum disease, and this makes them more susceptible to infection and inflammation, and kidney disease may lead to some health complications such as kidney failure. Cancer: Smoking, which is bad for oral health, is linked to oral and throat cancers, and gum disease may increase the risk of some types of cancer. Such as pancreatic cancer, blood cancer, and kidney cancer. Follow-up of oral and dental health The following methods ensure the preservation of healthy teeth and oral cavity: [3] Choosing the optimal brush; It is recommended to change it every 2-3 months, and use a soft-bristled toothbrush. Brushing properly, at least twice a day. Periodic review of the dentist. limit sugars and soda; Because of its role in weakening the enamel layer, which makes the tooth more susceptible to decay.