In your 40s, if your teeth are slanting to the side, consider that it is related to overcrowding, periodontitis, etc., and you can follow the doctor’s instructions to use medication or orthodontic treatment. 1. Crowded teeth: Usually, patients can use removable braces, square arch braces, etc. to straighten their teeth as prescribed by doctors. If the number of teeth is too large and the teeth are slanting to the side, it can be improved by reducing the number of teeth and extracting them. 2. Periodontitis: The disease will cause the patient’s teeth to loosen, the gap between the teeth becomes bigger, etc., and can also be manifested in the teeth to the side of the slope. If periodontitis is caused by calculus, surgical treatments such as supragingival scaling and subgingival scaling are feasible. Those who are clearly infected can be treated with antibiotics such as metronidazole, tetracycline, penicillin, etc. Minocycline gel and chlorhexidine acetate solution can also be used locally. In addition to medication, patients with periodontitis can also undergo surgical treatments such as flap surgery, bone grafting, guided tissue regeneration, and dental implantation depending on their condition. Patients can also use loose teeth fixation to maintain the normal position of the teeth, reduce the burden on the affected teeth, and avoid biting hard food with the affected teeth in daily life. It is recommended that patients consult a doctor for examination and treatment as prescribed by the doctor after clarifying the cause of the disease, and some patients can also be treated with other orthodontic methods such as metal brackets and ceramic brackets. Daily attention to oral care, timely brushing and rinsing after meals.