Oral Histology and Embryology CH 5 & 6 Quiz with correct answers

Teeth develop from two types of cells: CORRECT ANSWER oral epithelial > enamel organ > enamel mesenchymal > dental papilla > dentin Stages of tooth development (in order): CORRECT ANSWER 1) bud 2) cap 3) bell 4) dentinogenesis 5) amelogenesis 6) crown formation 7) root formation & eruption 8) function Bud Stage CORRECT ANSWER Initial stage; localized growth of epithelial cells surrounded by proliferating mesenchymal cells Cap Stage CORRECT ANSWER Epithelial cells now become the enamel organ & remain attached to the lamina. Mesenchyme forms the dental papilla, which becomes the dental pulp. Bell Stage CORRECT ANSWER Cells in the periphery of the dental papilla become odontoblasts which elongate and become columnar. They form a matrix of collagen fibers identified as predentin. 24 hours for matrix to become calcified and turns into dentin.