| Type | MGI:General | Description | at 4 weeks of age fully erupted molars display widening of the periodontal ligament at 3 months of age, high levels of inflammatory infiltrate, primarily consisting of neutrophils, are seen in the periodontal ligament presence of this infiltrate results in local conversion of the periodontal ligament to granulation tissue foreign particles, such as hair shafts, are seen in the periodontal ligament |
