Internal resorption

Internal inflammatory resorption starts inside the root canal, destroying root or crown dentine. Internal inflammatory resorption is usually supposed to be induced by trauma to the odontoblast and predentine layer exposing the mineralized dentine to the pulp tissue. Local inflammation stimulates pulpal cells to undergo a change into osteoclastic cells that start resorbing dentine. However, without continuous microbial stimulation it is possible that most internal resorptions would be self-limiting and so small that their detection in the radiographs would be difficult.