What if root canal treatment is not thorough?

Traditional root canal therapy is the main treatment for pulp diseases and periapical diseases, which originated in the middle of19th century and is the best treatment for these diseases. Conventional root canal therapy generally includes three steps: root canal cleaning, root canal shaping and root canal filling. The first two items are also called root canal preparation, that is, removing the bacteria and residual pulp in the root canal system to make the root canal into a smooth conical root canal, and then filling the root canal with insoluble materials with good biocompatibility to seal the root canal cavity and prevent the root canal from reinfection. Kang Jie Stomatological Hospital pointed out that the root canal must be filled tightly, and there is no dead angle in the root canal to prevent bacteria from staying and reproducing in the root canal. If the filling is not accurate and the dead space remains, it will easily lead to the failure of root canal treatment and the proliferation of bacteria, which will lead to the occurrence or non-healing of periapical lesions. To achieve close root canal filling, every step of root canal treatment must be thoroughly carried out. However, due to the great individual differences of root canals, it is difficult for some root canals to achieve strict filling effect, and professional instruments and equipment are needed for auxiliary treatment. Many dentists treat by feeling, which often leads to the recurrence of the disease. After root canal treatment, full crown should be done to protect teeth, because the amount of tooth tissue decreases and the resistance decreases after root canal treatment, which is mainly due to the destruction of tooth tissue before treatment and the need to remove some tooth tissue during treatment. After root canal therapy, the teeth lose the nutrition source from pulp, which leads to the increase of tooth brittleness. After root canal treatment, teeth are more prone to tooth fracture and need to be protected by full crown.