2. Cap stage (nine to ten weeks in utero)

During the cap stage the cells of the tooth grow and increase in number. The growth causes the tooth to bud into a cap-like shape. During this stage, three primary structures begin to form, including the enamel organ (which forms the tooth’s enamel), dental papilla (forming the dentine and pulp) and the dental follicle (forming the cementum). These three structures work together in the development of a tooth.