| 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 isnt 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 |
