Dental anatomy. Anatomical abnormality of the lower lateral incisor tooth.
Patient sought care for endodontic treatment of tooth 41 indicated by another colleague. She had no signs and symptoms and on clinical examination, pain on palpation and negative thermal test on tooth 41. On radiographic examination, a circumscribed radiolucent image on that tooth. It was verified on canal exploration that the tooth had more than one canal. After treatment and medication with calcium hydroxide, the patient returned only after 8 months, and the radiographic examination revealed an image of repair.
Irrigation and obturation was then performed. An anatomical abnormality is observed, with the presence of collateral canals.
dental anatomy
In: Machado, Ricardo. Endodontics: Biological and Technical Principles. Available at: GEN Group, GEN Group, 2022
Lower incisors
Usually, they have flat roots and canals in the mesiodistal direction, straight or slightly curved distally in the apical third.
Due to the flattening in the mesiodistal direction, canals of lower incisors tend to be wider in the opposite direction (buccolingual). For this reason, the instrumentation cannot contemplate all its walls, which results in poorly instrumented, cleaned and filled canals. Moreover, this flattening may predispose to the occurrence of two canals, a buccal and a lingual, not always detected on conventional radiographs. Because the root is inclined lingually and the pulp chamber has a small volume, mandibular incisors are also very susceptible to perforations during coronal opening.
Lower incisors
Usually, they have flat roots and canals in the mesiodistal direction, straight or slightly curved distally in the apical third.
Due to the flattening in the mesiodistal direction, canals of lower incisors tend to be wider in the opposite direction (buccolingual). For this reason, the instrumentation cannot contemplate all its walls, which results in poorly instrumented, cleaned and filled canals. Moreover, this flattening may predispose to the occurrence of two canals, a buccal and a lingual, not always detected on conventional radiographs. Because the root is inclined lingually and the pulp chamber has a small volume, mandibular incisors are also very susceptible to perforations during coronal opening.
dental anatomy
