Bogumil Dziubek
Bogumil Dziubek voted up Steve Theunissen's answer
Tooth development can be divided into three phases: (1) The period during which the crown of the tooth is formed from tissue cells and calcifies or hardens in the jawbone; (2) the period of eruption, when the tooth first becomes visible and root development is in progress; and (3) the maintenance period, during which time … Read more