What Is Dentinogenesis Imperfecta?

It is the hard tissue that forms the main body of the tooth. It is located in the inner layer of enamel and cementum. It is also the side wall of the pulp cavity and root canal. It is pale yellow in color and contains approximately 30% organic and water and 70% inorganic. , Hardness is lower than dental enamel. If you observe with a microscope, you can see that there are many regularly arranged thin tubes in the dentin, called dentin tubules. There are nerve fibers in the tube. When the dentin is exposed, it can feel cold, hot, acid, and sweet stimuli from the outside. pain.

It is the hard tissue that forms the main body of the tooth. It is located in the inner layer of enamel and cementum. It is also the side wall of the pulp cavity and root canal. It is pale yellow in color and contains approximately 30% organic and water and 70% inorganic. , Hardness is lower than dental enamel. If you observe with a microscope, you can see that there are many regularly arranged thin tubes in the dentin, called dentin tubules. There are nerve fibers in the tube. When the dentin is exposed, it can feel cold, hot, acid, and sweet stimuli from the outside. pain.

Chinese name

Dentin

lie in

The inner layer of enamel and cementum

Overview of Dentin

Dentin is secreted by odontoblasts and its main function is to protect the pulp inside and support the enamel on its surface. Its crown and root surfaces are covered by enamel and cementum, respectively. There is pulp tissue in the pulp cavity in the center of the dentin. Because dentin and pulp are closely related in embryogenesis and function, they are collectively referred to as pulp-dentinal complex.

Dentin classification

Dentin is formed throughout a person's life, and can be divided into three categories: the first period of primary (primary), the second period of secondary (secondary), and the third period (tertiary) dentin.

The primary tooth is the dentin formed in the process of tooth formation, and the formation of the apical foramen is basically completed; after that, the teeth that have not yet been born and the firstborn can continue to form slowly and physiologically. Sexual dentin; formed without external stimuli. After the tooth has emerged, the third stage of dentin formed on the pulp end of the dentin canal is affected when the dentin is stimulated due to wear, trauma, caries or surgery.

Nerve distribution of dentin

The authors used silver staining and autoradiographic neuroanatomical tracing to study the distribution of oracles in human and rat molar dentin. The results show that there are slender nerve fibers in the dentin of humans and rats. These sacred fibers continue with the nerve fibers of the pulp and pre-dental dentin and reach the enamel dentin boundary. Studies have shown that nerve fibers are distributed in dentin. These fibers come from the pulp nerve.