Pulpitis is divided into normal pulpitis and retrograde pulpitis. Normal pulpitis is a further development from bacterial infection of the hard tissues of the tooth to the pulp tissues, which means it can be captured on an X-ray. It mainly presents as a low-density image near the pulp. This stage of pulpitis is normal, developed through the normal pathway, and can be identified on an X-ray. If the pulpitis is due to the development of a periodontal pocket, bacteria infect the root apex area retrogradely through the periodontal pocket, causing pathological changes in the pulp tissue of the root apex area. Retrograde pulpitis cannot be detected on an X-ray.