Tetracycline Teeth
Introduction
Introduction to Tetracycline Tetracycline teeth are colored teeth caused by tetracycline drugs. The cause is the administration of a tetracycline-based drug during the developmental mineralization of the tooth, which can be incorporated into the dental tissue to color the teeth. Tetracycline can also cause deciduous coloration in the mother through the placenta. basic knowledge Sickness ratio: 0.05% Susceptible people: no special people Mode of infection: non-infectious Complications: periodontitis
Cause
Tetracycline tooth cause
Coloring (30%):
Sometimes enamel hypoplasia is combined. Due to the chelated nature of the tetracycline molecule, a stable tetracycline orthophosphate complex can be formed with the dental tissue. This substance can inhibit the mineralization of the two upper phases, namely nucleation and crystal growth. The color of the tetracycline drug itself, such as: demethyl chlortetracycline is cadmium yellow, oxytetracycline is lemon yellow. The color of tetracycline is degraded because tetracycline is sensitive to light and can change color under ultraviolet light or sunlight.
Dentin (30%):
Tetracycline in the dentin, the degree of dentin coloration is different due to the depth of the bonding site. When the coloring band is closer to the enamel dentin, the coloring is easier. Therefore, in the early stage of the baby, when the outer layer is formed, The drug has the greatest impact.
Enamel structure (25%):
In the case of severe enamel hypoplasia and complete loss of enamel, the dentin is obviously exposed; if the enamel is incompletely developed and the enamel loses transparency and is white, it can cover the pigmented dentin, and the tooth color is close to normal.
Prevention
Tetracycline prevention
In order to prevent the occurrence of tetracycline teeth, pregnant women and women who are breast-feeding, as well as children under 8 years of age, should not use tetracyclines to control the amount of fluoride in drinking water.
Complication
Tetracycline dental complications Complications periodontitis
1, causing enamel hypoplasia, deciduous teeth, permanent teeth, mixed dentition discoloration: occasionally taking tetracyclines once, the damage to the teeth is very small, and if the uniform, its damage is self-evident, and pregnant women take tetracycline on the fetus It will have an effect. If you take the medicine for more than 4 months of pregnancy, your child will have deciduous teeth or enamel hypoplasia.
2, the occurrence of enamel defects: the formation of teeth, the earlier the drug, the greater the dose, the longer the medication, the greater the harm of tetracycline teeth on the development of children's teeth, the more discolored the teeth, accompanied by enamel hypoplasia, etc. Even enamel defects appear.
3, damage to the enamel formation on the tooth surface: severe tetracycline teeth will accelerate the "mineralization" of the teeth (ie, the phenomenon of graying, blackening, etc.), which can easily lead to tooth allergy and embrittlement, causing various oral diseases.
Symptom
Tetracycline tooth symptoms Common symptoms Enamel corrosive teeth yellow
1. It is yellow, showing bright yellow fluorescence under sunlight, and then gradually changes from yellow to brown or dark gray. This transition is slow and can promote sunlight, so the lip of the incisor is discolored first. .
2. The anterior teeth are more colored than the posterior teeth; the deciduous teeth are more colored than the permanent teeth, because the enamel of the deciduous teeth is thinner and more transparent, and it is not easy to cover the color of the tetracycline conjugate in the dentin.
3. The degree of tooth coloration is related to the type of tetracycline, the dose and the number of doses. It is generally believed that the staining of tetracycline, normycin, tetracycline hydrochloride is more obvious than oxytetracycline, chlortetracycline, in permanent teeth, tetracycline The number of treatments is directly proportional to the degree of coloration, but a short-term high-dose dose is more effective than a long-term uniform dose.
4. Tetracycline causes tooth coloration and enamel hypoplasia, which can only be manifested during the development of the tooth. Generally speaking, after 6 to 7 years old, it will not cause distracting tooth discoloration.
Examine
Tetracycline tooth examination
Combined with medical history, oral examination can be diagnosed.
Diagnosis
Diagnosis and diagnosis of tetracycline
1. The medical history of 6-7 years old has been treated with a large dose of multiple short courses of medication (tetracyclines).
2. Clinical manifestations The teeth are yellowish gray or dark gray. Generally, the anterior teeth are more colored than the posterior teeth than the permanent teeth. In severe cases, the enamel is incomplete.
3. Differential diagnosis Excitation fluorescence can be observed by irradiating tetracycline teeth with ultraviolet light, which can be distinguished from hereditary opalescent dentin. The hereditary opal crown is translucent opalescent, which can be light yellow or brownish yellow. The enamel is easily lost. Especially the incisor and the molar joint are prone to enamel loss, dentin. Exposure, dentin is easily worn after exposure, manifested as the appearance of a dentin plane after severe wear.
