Concussion: Definition and clinical appearance
Concussion is defined as a physical injury to the tooth-supporting structures, without fracture, abnormal loosening, or displacement of the tooth. The only sign and symptom is a marked tenderness to percussion and “a sore tooth”.
Response to pulp testing may be temporarily absent during the acute phase. No immediate action should be taken related to endodontic treatment.
Clinical photograph showing central incisors after trauma. There are no visible signs of trauma to the teeth (eg, no bleeding from periodontal pockets, and no change of tooth position).
This photograph shows a patient whose lateral incisors have not yet reached their final position.
Concussion: Radiographic findings
Intraoral films demonstrate that the incisors are in their normal position in the socket.
Subluxation: Definition and clinical appearance
Subluxation is defined as a physical injury to the tooth-supporting structures with some loosening of the tooth but without fracture or displacement. The signs and symptoms are marked tenderness to percussion, mobility, and “a sore tooth”. Occasionally the tooth will feel too “high” on occlusion due to periodontal ligament edema.
Response to the pulp testing is frequentlyabsent. Decisions related to endodontic treatment depend on combined information from x-ray examination and pulp testing as well as clinical symptoms. Action related to endodontic treatment may be taken after 2 months.
Clinical photograph showing subluxated left maxillary central incisor with bleeding from the periodontal pocket as a sign of subluxation. There are traces of bleeding on the tooth. No apparent displacement of the tooth is visible.
Subluxation: Radiographic findings
Intraoral films show the left maxillary central incisor in its normal position in the socket. In some cases, a widening of the periodontal ligament may indicate periodontal ligament edema.