GASTRO-ESOPHAGEAL REFLUX DISEASE (GERD):

An intrusion of tooth is an apical displacement of tooth into the alveolar tissue. The tooth impinges upon the periodontal ligament once it forces itself inside the alveolar bone and results in a crushing fracture of the alveolar socket. Extrusion may be defined as a partial displacement of the tooth axially from the socket. ................
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