What are the causes of pulp necrosis in primary teeth?

The main causes of pulp necrosis in primary teeth include the following: 1. Dental caries: Poor oral hygiene can lead to bacterial proliferation and tooth decay. If left untreated, dental caries may progressively deepen and eventually involve the pulp, leading to pulp infection and necrosis. 2. Dental trauma: Injury caused by external forces, such as crown fracture, may expose the pulp. Bacteria can enter the pulp through the exposure site, causing infection and subsequent pulp necrosis. 3. Other oral diseases: Inflammatory conditions such as pulpitis and apical periodontitis can spread to the pulp and cause pulp necrosis if not treated promptly. 4. Medications or chemical irritation: Certain toxic substances (e.g., arsenic preparations, paraformaldehyde) or prolonged chemical irritation may also lead to pulp necrosis. Parents should pay attention to their child's oral hygiene, schedule regular dental check-ups, and promptly identify and treat oral problems to prevent pulp necrosis in primary teeth.