Development and growth of teeth - Highlights
The development and growth of teeth is a complex process of interactions between the primitive oral epithelium and the underlying 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.
📝Here are some "Highlights" or a high level overview of Development and Growth of teeth
After about six weeks of development of the embryo, a proliferation of cells in the form of a thickened band appears in the presumptive or developing upper and lower jaws.
This thick band of proliferation is called the primary epithelial band.
The enamel organ in the bud stage comprises of low columnar cells peripherally and polygonal cells centrally.
In the cap stage, the enamel organ comprises of three different types of cells called the inner & outer enamel epithelium and the stellate reticulum.
In the bell stage, the enamel organ continues to grow and assumes a bell shape.
The bell stage is marked by two events called morphodifferentiation and histodifferentiation, both happening simultaneously.
The advanced bell stage is marked by the formation and mineralization of the enamel and dentin.
Cervical loop starts to proliferate to give rise to the Hertwig’s epithelial root sheath.
Root sheath is never continuous. It keeps disintegrating as it grows. Some of the disintegrated cells do not migrate and may persist in the root area. These cells form the epithelial rests of Malassez.
🔎You could dig deeper into the topic
In fact, we delve a lot more deeper into this topic with our cheatsheets/notes -> Development and growth of Teeth - Part I & Part II.
In Development and growth of Teeth - Part I, we talk about
Early Events (Initiation)
In Development and growth of Teeth - Part II, we talk about
Events in Bell Stage
Acquiring a “Bell” shape
Advanced Bell Stage
Root Sheath and Epithelial Diaphragm
Rest of Root Formation
Root formation in multi-rooted teeth
You could read in detail about Development and growth of Teeth with our Revision Ninja - Oral Histology Course bundle!
Apart from Notes, you could also get access to numerous MCQs and Videos with English captions/subtitles on various topics in Histology.