percussion and is often accompanied by gingival bleeding Moderate to severely mobile teeth, especially if permanent, may require splinting to aid in optimal healing and prevent aspiration These injuries should be referred to the dental service as soon as possible Mobile primary teeth are commonly extracted to prevent aspiration Intruded teeth are those that are displaced directly into the socket Complete intrusion may result in the tooth not being visible, giving the false appearance of being avulsed Thus, an intraoral dental radiograph must be obtained to make the proper diagnosis The prognosis for maintaining pulpal vitality of an intruded tooth is poor because of the severe pulpal compression at the apex of the tooth Intruded primary teeth can be either extracted or allowed to spontaneously reerupt, depending on the severity of the intrusion, proximity to its succedaneous tooth, and condition of the surrounding bone and soft tissues Intrusive injuries in the permanent dentition often require repositioning and splinting; however, in some instances good outcomes are achieved if the tooth is allowed to spontaneously reerupt Pulpal treatment (endodontics) is almost always needed because the pulp usually becomes nonvital and if left untreated the necrosis can cause root resorption and periapical infection Compression fractures of the alveolar socket and anterior nasal spine may be seen radiographically and need immediate attention by a dentist