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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.
Adult front teeth (which usually erupt at around six years of age) can be replaced immediately if clean. If a tooth is avulsed, make sure it is a permanent tooth (primary teeth should not be replanted, and instead the injury site should be cleaned to allow the adult tooth to begin to erupt). Reassure the patient and keep them calm.
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.
A certain intrusive force acting on the incisors is counter-acted by an opposite and equal extrusive force acting at the posterior teeth of the same arch. The extrusive force is felt at buccal of the center of resistance of a molar tooth because the bracket slot in the molar tube or band lies buccal to the tooth.
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 ...
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Dental avulsion is a true dental emergency in which prompt management affects the prognosis of the tooth. [14] Replantation of the tooth within 15 minutes is associated with the best prognosis as periodontal ligament (PDL) cells are still viable. Total extra-oral dry time of more than 60 minutes, regardless of storage media, has poor prognosis.
After nine years and nearly $350 million, USA TODAY confirmed just one exoneration resulting from a grant program to address untested rape kits.
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