Although tooth eruption mechanisms are still under debate, it was suggested that periodontal ligament
provides eruption force after the tooth has pierced gingiva but not during intraosseous stage. For active tooth eruption to begin eruption pathway by osteoclasts in alveolar bone must be formed. In succedeaneous dentition, this pathway follows the gubernacular canal above each tooth; i.e., bone resorption widens the canal to allow the crown to move through it and exit the alveolar bone.
Factors Influencing Tooth Eruption