DEVELOPMENT AND GROWTH OF TEETH – PART II: BELL STAGE AND ROOT DEVELOPMENT
Author: Sanketh DS, MDS
The development and growth of teeth is a complex process of interactions between the primitive oral epithelium and the underlying ectomesenchymal cells. The epithelium is derived from the ectoderm of the first pharyngeal arch while the cells of the ectomesenchyme are neural crest in origin. Since the neural crest cells are primarily derived from the ectoderm and eventually give rise to mesenchymal tissues, they are called ectomesenchymal cells. Tooth development, though a continuous process, can be divided into three stages called the bud, cap and bell stages. These stages are so named because of the shape the enamel organ assumes in each stage.
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