The risk of healing complications in primary teeth with intrusive luxation: A retrospective cohort study

Abstract

Over 80% of the intruded primary teeth re-erupted spontaneously. However, nearly one-third of the teeth showed complications such as pulp infection/periapical inflammation or ankylosis, which could potentially affect the development of the permanent incisor. Therefore, patients should be monitored regularly, especially during the first year after injury, to diagnose and treat complications in time.

Dental trauma on primary teeth at different root resorption stages—A dynamic finite element impact analysis of the effect on the permanent tooth germ

“…The FEA results showed the highest impact stresses in the surrounding bone and soft tissue for the model of a 3.5‐year‐old child with no physiological root resorption of the primary tooth. The stress concentrations in the surrounding bone and soft tissue seem to correlate with areas instigated in complications of the root and crown formation phase . The analysis also indicated that impact to a primary incisor with complete root (children aged 3.5 years old) caused less stress and strain on the permanent tooth germ compared to teeth with more root resorption (5‐6 years old).…”

“…The sequelae in these cases might affect root development of the permanent tooth germ as root dilacerations, which are less common compared to complications for a permanent crown . Trauma to the primary incisor through pulp necrosis and infection with periapical abscesses has been reported to have the potential to damage the development of a permanent tooth . In the current impact model of a primary incisor without full root resorption (model of 3.5 years old), the apex of the primary incisor was compressed against the bone barrier, causing high stresses at its apex.…”

“…Severe intrusion injuries of primary teeth can be lead to alterations in the permanent dentition, such as hypoplasia, shape alterations, root dilacerations, and white/yellow spot lesions . Pulp necrosis with infection and periapical inflammation or ankylosis of primary teeth can also cause complications in the development of permanent teeth . Damage may be caused by direct trauma where the primary tooth contacts the permanent tooth germ .…”

Unusual sequelae of a subluxated primary incisor on its permanent successor tooth

“…The risk of the potential consequences in the permanent dentition is well documented . However, due to the variations in the study designs and presentation of results, it is difficult to make comparisons between the published studies.…”

“…Nonetheless, it is apparent that the more severely affected the primary tooth is, the higher the frequency of developmental disturbance in the permanent succesor . Concussion and subluxation injuries are reported to cause minimal consequences (8.3%) to their permanent successors . Tooth discoloration and subsequent pulp necrosis and infection of the affected primary teeth are the most commonly reported sequelae following subluxation injuries .…”