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Dental intrusion is an apical displacement of the tooth into the alveolar bone.This injury is accompanied by extensive damage to periodontal ligament, cementum, disruption of the neurovascular supply to the pulp, and communication or fracture of the alveolar socket.
Trauma to primary teeth occurs most commonly at the age of two to three years, during the development of motor coordination. [7] When primary teeth are injured, the resulting treatment prioritises the safety of the adult tooth, [7] and should avoid any risk of damaging the permanent successors. [8]
If apex of tooth is displaced towards the palate and making contact with the tooth germ then tooth is extracted Intrusive Luxation: Displacement of tooth into the alveolar bone (pushed into the socket) causing fracture of the alveolar bone. It is the most damaging injury to the tooth and supporting tissues as ankylosis and pulp necrosis can occur.
Dental avulsion is the complete displacement of a tooth from its socket in alveolar bone owing to trauma, such as can be caused by a fall, road traffic accident, assault, sports, or occupational injury.
Intrusion is a movement in the field of orthodontics where a tooth is moved partially into the bone. Intrusion is done in orthodontics to correct an anterior deep bite or in some cases intrusion of the over-erupted posterior teeth with no opposing tooth. [1] Intrusion can be done in many ways and consists of many different types.
Tooth ankylosis refers to a fusion between a tooth and underlying bony support tissues. In some species, this is a normal process that occurs during the formation or maintenance of the dentition. [1] By contrast, in humans tooth ankylosis is pathological, whereby a fusion between alveolar bone and the cementum of a tooth occurs.
The exact causes of pulp obliteration are unclear [2] but it typically occurs in response to dental trauma, [1] especially following luxation injuries involving displacement, particularly if a tooth is replanted after being completely avulsed (knocked out) [3] This response is common in this scenario and typically starts to occur several months ...
This leads to an inflammatory process that causes external root resorption. [16] Alternatively, pressure may also cause external inflammatory root resorption. Specifically, application of heavy, continuous, and intrusive (i.e. directed toward the bone) forces during orthodontic tooth movement are associated with external root resorption. [17]