Context and Definition

Term Meaning
Concussion An injury to the tooth-supporting structures with no increase in tooth mobility, and no displacement of the tooth. The tooth however is tender to touch.
Subluxation An injury to the tooth-supporting structures with an increase in tooth mobility. However tooth position remains correct
Intrusion An injury resulting in apical displacement of the tooth (ie, the tooth has become displaced into the tooth socket)
Extrusion Coronal displacement of the tooth (the tooth has moved out of the socket but has not come out completely)
Lateral luxation Movement of a tooth in any direction that isn’t axial. For example, the tooth may be displaced buccally or palatally
Avulsion The tooth has been completed displaced out of the socket
Enamel fracture Damage to the enamel of a tooth resulting in the loss of tissue, isolated to enamel only
Enamel and dentine fracture Fracture of a tooth extending through both enamel and dentine, resulting in the loss of both tissues, not extending into the dental pulp
Complicated crown fracture Fracture through the tooth extending into the dental pulp of a tooth. Also known as an enamel-dentine-pulp fracture
Root fracture Fracture of the apical portion of the tooth which involved dentine, pulp and cementum
Alveolar bone fracture Fracture of the alveolar process of the maxilla or mandible, which may or may not involve the socket itself. Note this is not the same as a fracture to the mandible or maxilla itself, and treatment between these two conditions is different.
Periodontia Structures that are the supporting structures present around the teeth, including gingiva, bone, cementum and periodontal ligament
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