Dental ankylosis.
Patient 17 years old, with advanced ankylosis in the maxillary anterior and history of avulsion and reimplantation after trauma with about 11 years. The case serves as a warning for accurate planning and evaluation in case of reimplantation of avulsed teeth in patients in the bone development phase.
Dental ankylosis. in: Machado, Ricardo. Endodontics: Biological and Technical Principles. Available at: GEN Group, GEN Group, 2022.
Internal replacement resorptions
These occur from chronic inflammatory reactions or partial necrosis of the pulp tissue, followed by infection. The dentin is resorbed and the pulp is replaced by metaplastic mineralized tissue resembling bone or cementum (box "Definition and relevant considerations on metaplasia"). As with inflammatory internal tooth resorption, the main etiological factors are also trauma.
There are two hypotheses for the origin of metaplastic tissue associated with replacement internal tooth resorption. The first is that it is produced by stem cells present in the vital apical pulp in response to resorption (process similar to tertiary or reactional dentin formation). The second suggests that both (granulation tissue and mineralized tissue) originate from the vascular system or periodontium (non-pulpal genesis).
Teeth affected by internal substitutional resorption are usually asymptomatic and vital. Pulp necrosis can occur in cases of communication (see below). Radiographically, an increase in volume of a specific area of the pulp cavity is observed. The continuous reconstitution of bone tissue at the expense of dentin resorption is responsible for the radiopacity of the region. After some time, the resorption process is interrupted and obliteration of the root canal occurs
There are two hypotheses for the origin of metaplastic tissue associated with replacement internal tooth resorption. The first is that it is produced by stem cells present in the vital apical pulp in response to resorption (process similar to tertiary or reactional dentin formation). The second suggests that both (granulation tissue and mineralized tissue) originate from the vascular system or periodontium (non-pulpal genesis).
Teeth affected by internal substitutional resorption are usually asymptomatic and vital. Pulp necrosis can occur in cases of communication (see below). Radiographically, an increase in volume of a specific area of the pulp cavity is observed. The continuous reconstitution of bone tissue at the expense of dentin resorption is responsible for the radiopacity of the region. After some time, the resorptive process is interrupted and root canal obliteration occurs.
Dental ankylosis.
