Why does my tooth still hurt after root canal treatment?

The health of teeth has always been a concern, because the health of teeth is easily affected by various factors, among which the health of the root is the most vulnerable part. The root part includes the root canal, which is the core part of the root inflammation and can cause serious damage to the health of the teeth. For example, why is it still painful after root canal treatment? Let’s take a look at the explanation below.

The pulp is not cleaned

If the root canal is not cleaned thoroughly during root canal treatment, there will still be active pulp remaining in the root canal, causing pain due to the combined effects of mechanical damage, drug stimulation and inflammation.

Missed root canal

The tooth root canal system is very complex, and the root canals of certain teeth often vary. If a root canal is missed during root canal treatment and the root canal treatment is not completed, it may become a lesion and lead to residual pulpitis or apical periodontitis.

Poor root canal disinfection effect

Bacterial infection is the main cause of pulpitis and apical periodontitis. If the root canal disinfection effect is poor and a large number of bacteria remain in the root canal, it may lead to failure of root canal treatment.

Cracked teeth

Some patients choose to fill their teeth after root canal treatment instead of doing brace repair in time. As a result, the teeth split and cause pain after biting hard objects, but at this time the teeth may no longer be able to be saved. Therefore, wearing braces in time after root canal treatment can greatly reduce the risk of tooth splitting.

Drug-induced pain

This is related to the nature of the drugs used in root canal treatment and the individual differences of patients. In order to remove the infected substances in the root canal as much as possible, root canal flushing and root canal sealing and disinfection are required during root canal treatment. Some patients will react significantly to the commonly used root canal disinfection drugs in clinical practice and experience pain.

Underfilled root canals

When the root canal is underfilled, the apical seal is poor and tissue fluid can penetrate into the root canal, causing bacteria to multiply in the root canal and causing acute or chronic apical periodontitis.

Pain caused by periapical tissue damage is also a common cause. When the root canal is cleaned and enlarged, the chronic inflammation of the root apex is stimulated, causing acute apical periodontitis in the affected tooth.