Concussion

Concussion is a traumatic injury that involves the tooth.There is crushing injury to the apical vasculature and the periodontal ligament of the apical region leading to inflammatory edema.Thus it involves the supporting tissues of the teeth.As there is accumulation of inflammatory edema in the apical region,the affected person will suffer from pain.The involved tooth may be slightly elevated from the socket.This results in pain while biting.The radiographic change that is noticeable in concussion in widening of the periodontal ligament space at the apex.Evidence of pulpal necrosis and periapical lesion may be noted after a variable period of time.