Crowns are translucent opalescent
Introduction
Introduction The clinical manifestations of hereditary opalescent teeth are translucent opalescent, which can be either light yellow or brownish yellow. The translucent opalescent color of the crown is generally hereditary dentin hypoplasia. It is a common oral disease with a high incidence of children. The main symptoms are calcification abnormalities and defects of dentin. The enamel develops normally, but it is easy to separate from the surface of dentin, which causes the dentin to be exposed and the crown to wear. The disease is autosomal dominant, and the permanent teeth can be affected. The coding gene that causes this disease is located at 4q13. Therefore, some people think that this disease is related to mesoderm dysplasia.
Cause
Cause
The cause of the translucent milk color of the crown
The disease is autosomal dominant, and the permanent teeth can be affected. The coding gene that causes this disease is located at 4q13. Some patients with this disease are also accompanied by osteogenesis imperfecta, so some people think that this disease is related to mesoderm dysplasia.
Examine
an examination
Related inspection
Endoscopic endodontic electrokinetic activity determination of pulp temperature test (cold fever diagnosis)
Examination of the crown with a translucent opalescent color
Under the microscope, the arrangement of dentinal tubules is disordered, the lumen is enlarged, and the number of dentinal tubules in the unit dentin is reduced. The dentinal tubules disappeared in some areas. It can be seen that dentin cells are denatured and the secreted matrix proteins are abnormal. The cells themselves may be encapsulated in the matrix or calcified dentin, and the dentin calcification is abnormal. As the teeth are further abraded, prosthetic dentin is continuously formed in the medullary canal and root canal, and at most, the repaired dentin is filled throughout the medullary cavity. The enamel thickness and morphology develop normally, but the enamel dentin boundary lacks a zigzag staggered structure, which makes the dentin and enamel have an approximately linear joint, and the mechanical fitting force is poor. The cementum, periodontal ligament and alveolar bone developed normally.
The crown is translucent and opalescent, either light yellow or brownish yellow. The enamel is easily lost. In particular, the occlusion of the incisor and the molar is prone to enamel loss and dentin exposure. Dentin is easily worn after exposure, which is manifested by the appearance of a dentin plane after severe abrasion.
X-ray films showed that the early medullary cavity was larger, and after enamel abrasion, calcification atresia gradually appeared in the medullary cavity and root canal. Periodontal support tissue is normal. Sometimes a shel tooth is seen, which is characterized by a large medullary cavity, a thin dentin layer, and an abnormally short root, but no root absorption.
Diagnosis
Differential diagnosis
The crown is translucent and the color is easily confused.
The teeth are brownish black: the color of the teeth changes abnormally and appears brownish black. Coloration in the teeth is the discoloration of the teeth caused by the tissue structure or nutrient change of the teeth. Common necrosis of the pulp, enamel enamel and drug deposition cause tooth discoloration. Coloring outside the teeth means that the surface of the teeth is pigmented.
Yellow teeth: The teeth appear yellow due to various reasons.
Abnormal color of teeth: Because the surface of the tooth is covered with a layer of enamel, it is transparent or translucent, and its deep part is dentin, which is pale yellow. The color of the teeth is related to the degree of calcification of the enamel. The higher the degree of calcification, the more transparent the enamel is, and the true color of the deep dentin through it makes the teeth pale yellow, and the color of the teeth is abnormal in various dental diseases.
Dark spots of teeth: Some people drink or eat foods that are easy to dye for a long time, or long-term exposure to certain minerals, such as long-term use of potassium permanganate water to gargle, silver nitrate treatment of oral diseases can be exposed to mercury. Both can make the teeth black. Contact with iron, sulfur and other substances, it is easy to make the teeth appear black and green. In addition, enamel hypoplasia, dentin hypoplasia, hereditary opal teeth, dental fluorosis, tetracycline teeth, dental caries, etc. can make the teeth yellow, brown, black.
