What are the causes of chronic gingivitis?

The causes of chronic gingivitis are diverse, primarily including the following aspects: 1. Poor oral hygiene: This is one of the main causes of chronic gingivitis. If patients do not pay attention to oral hygiene in daily life, such as failing to develop the habit of brushing teeth in the morning and evening or rinsing the mouth promptly after meals, food debris and bacteria will accumulate in the mouth, leading to chronic gingivitis. 2. Dental plaque and calculus: Dental plaque is a microbial community adhering to the tooth surface or other soft tissues in the oral cavity. If not cleaned regularly, it can form dental calculus, which irritates the gums and triggers chronic gingivitis. 3. Malaligned teeth: Tooth displacement or misalignment can cause food debris to accumulate between teeth, making cleaning difficult and increasing the risk of chronic gingivitis. 4. Poorly fitting restorations and irritants: Removable dentures, orthodontic appliance bases, etc., may cause irritation to the gums if their edges do not fit properly, potentially leading to chronic gingivitis. 5. Systemic factors: Systemic diseases such as malnutrition and anemia may lead to decreased immunity, increasing the risk of developing chronic gingivitis.