1. Partial displacement of a tooth from its socket. If caused by external trauma, treatment involves repositioning the tooth in the socket under local anaesthesia using digital pressure followed by splinting if there is alveolar bone fracture. Loss of vitality is a common sequel.
2. The intentional pulling of a tooth into a more acceptable position, either in an occlusal or incisal direction. This may be carried out using elastics linking a fixed or removable orthodontic appliance to a hook cemented on to the crown of the tooth to be extruded.
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