Developmental Disturbances of Teeth
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Questions and Answers

What is the most common condition associated with hypodontia?

  • Amelogenesis imperfecta
  • Turner's tooth
  • Macrodontia
  • Down's syndrome (correct)

    • Which type of supernumerary teeth is most commonly found between the maxillary central incisors?

  • Mesiodens (correct)
  • Paramolar
  • Distomolar
  • Mandibular premolar

    • What are natal and neonatal teeth?

  • Teeth observable at birth or within the first 30 days of life (correct)
  • Permanent teeth that may be obstructed
  • Teeth affected by microdontia
  • Extra teeth that form in the dental arches

    • What type of teeth usually erupt unobstructed, but may be obstructed in some cases?

    <p>Deciduous teeth</p> Signup and view all the answers

    Which type of dental abnormality is characterized by one or more teeth being smaller than normal?

    <p>Microdontia</p> Signup and view all the answers

    What type of dental abnormality is characterized by one or more teeth being larger than normal?

    <p>Macrodontia</p> Signup and view all the answers

    What type of defect in enamel is caused by trauma or chronic periapical infection?

    <p>Developmental defects in enamel</p> Signup and view all the answers

    What genetic disorder affects the enamel of the teeth with various types based on the defects in enamel formation and mineralization?

    <p>Amelogenesis imperfecta</p> Signup and view all the answers

    What does anodontia lead to?

    <p>Failure of alveolar process to develop</p> Signup and view all the answers

    What is the term for teeth observable at birth or within the first 30 days of life?

    <p>Natal and neonatal teeth</p> Signup and view all the answers

    What is the term for deciduous teeth that usually erupt unobstructed?

    <p>Baby teeth</p> Signup and view all the answers

    Which type of supernumerary teeth is found distal to the third molar?

    <p>Distomolar</p> Signup and view all the answers

    Which term is used to define conditions present at conception or occurring before the end of pregnancy?

    <p>Developmental anomalies</p> Signup and view all the answers

    What is the term for congenital lack of teeth?

    <p>Anodontia</p> Signup and view all the answers

    Which condition involves having less than 6 congenitally missing teeth?

    <p>Hypodontia</p> Signup and view all the answers

    What is the term for having 6 or more congenitally missing teeth?

    <p>Oligodontia</p> Signup and view all the answers

    Which teeth are most commonly affected by hypodontia and oligodontia?

    <p>Maxillary lateral incisors and mandibular second premolars</p> Signup and view all the answers

    Which tooth is most commonly missing in the deciduous dentition?

    <p>Mandibular central incisor</p> Signup and view all the answers

    Which missing teeth syndrome involves ectodermal derivatives such as hair, sweat glands, nails, and teeth?

    <p>X-linked ectodermal dysplasia</p> Signup and view all the answers

    At what stage of dental development may developmental dental anomalies occur?

    <p>Before birth</p> Signup and view all the answers

    What is the best-known missing teeth syndrome?

    <p>Ectodermal dysplasia syndrome</p> Signup and view all the answers

    Which term is used to define conditions present at or before the end of pregnancy?

    <p>Developmental anomalies</p> Signup and view all the answers

    What is another term for developmental anomalies?

    <p>Birth defects</p> Signup and view all the answers

    Which condition involves having less than 6 congenitally missing teeth?

    <p>Hypodontia</p> Signup and view all the answers

    Which substance, when ingested during tooth development, can result in dental fluorosis?

    <p>Fluoride</p> Signup and view all the answers

    Which deficiency has been implicated in the developmental defect of enamel?

    <p>All of the above</p> Signup and view all the answers

    Which infectious disease occurring during early childhood may be related to the developmental defect of enamel?

    <p>Measles</p> Signup and view all the answers

    What type of defect in the crystal structure of enamel leads to a mottled enamel with white to brown to yellow colors?

    <p>Hypomaturation (Hypomineralization)</p> Signup and view all the answers

    Ingestion of excess fluoride during tooth development can result in dental fluorosis, which may vary in color from chalky white, yellow, or brown. What is another possible appearance associated with dental fluorosis?

    <p>Both a and b</p> Signup and view all the answers

    Which trace element ingestion during amelogenesis has been associated with developmental defects of enamel?

    <p>Fluoride</p> Signup and view all the answers

    Which systemic disturbance usually involves teeth formed during the first year of life and results in generalized enamel hypoplasia?

    <p>Systemic disturbances due to systemic disturbances</p> Signup and view all the answers

    What deficiency has been linked to developmental defects of enamel, such as hypocalcemia and hypophosphatemia?

    <p>$Ca^{2+}$ or $PO_4 ^{3-}$</p> Signup and view all the answers

    "Exposure to such substances during amelogenesis may result in the formation of defective enamel depending on the stage of enamel development, the timing of exposure, the length of exposure." Which substance is being referred to in this statement?

    <p>$F^-$</p> Signup and view all the answers

    "Ingestion of excess fluoride (more than one PPM) during tooth development can result in dental fluorosis." How is dental fluorosis characterized?

    <p>$F^-$ discoloration</p> Signup and view all the answers

    What is the name given to the defect causing tapering of mesial and distal surfaces towards the incisal edge with a screwdriver appearance and a central notch at their incisal edge?

    <p>Hutchinson's incisors</p> Signup and view all the answers

    What is the term for the chipping of enamel away from the normal dentine surface?

    <p>Hypomaturation (Hypomineralization)</p> Signup and view all the answers

    Developmental anomalies only occur after birth

    <p>False</p> Signup and view all the answers

    Anodontia is the congenital lack of teeth

    <p>True</p> Signup and view all the answers

    Hypodontia involves having 6 or more congenitally missing teeth

    <p>False</p> Signup and view all the answers

    The mandibular incisor is the tooth most commonly missing in the deciduous dentition

    <p>False</p> Signup and view all the answers

    X-linked ectodermal dysplasia is the best known of the missing teeth syndromes

    <p>True</p> Signup and view all the answers

    Ectodermal derivatives such as hair, sweat glands, nails, and teeth are involved in X-linked ectodermal dysplasia

    <p>True</p> Signup and view all the answers

    Hypodontia and oligodontia primarily affect the deciduous dentition

    <p>False</p> Signup and view all the answers

    The maxillary and mandibular third molars are the teeth most often missing in hypodontia and oligodontia

    <p>True</p> Signup and view all the answers

    Teeth are often missing unilaterally in hypodontia and oligodontia

    <p>False</p> Signup and view all the answers

    Hypodontia and oligodontia are congenital abnormalities in the number of teeth

    <p>True</p> Signup and view all the answers

    Ectodermal dysplasia is associated with developmental dental anomalies

    <p>True</p> Signup and view all the answers

    Anodontia may affect both deciduous and permanent teeth

    <p>True</p> Signup and view all the answers

    Chronic periapical infection can cause the defect in enamel known as enamel hypoplasia.

    <p>True</p> Signup and view all the answers

    Ingestion of excess fluoride during tooth development can result in enamel hypoplasia.

    <p>False</p> Signup and view all the answers

    Vitamin A deficiency has been linked to the developmental defect of enamel known as enamel hypoplasia.

    <p>True</p> Signup and view all the answers

    Hypomaturation type of enamel defect can be pierced with an explorer tip with firm pressure.

    <p>True</p> Signup and view all the answers

    Exposure to excess fluoride during amelogenesis can result in the formation of defective enamel.

    <p>True</p> Signup and view all the answers

    Hypocalcemia is not implicated in developmental defects of enamel.

    <p>False</p> Signup and view all the answers

    Mercury ingestion during tooth development can result in dental fluorosis.

    <p>True</p> Signup and view all the answers

    Systemic disturbances usually involve teeth formed during the first three years of life.

    <p>False</p> Signup and view all the answers

    Ingestion of lead during tooth development has not been associated with developmental defects of enamel.

    <p>False</p> Signup and view all the answers

    Ingestion of excess fluoride during tooth development can result in dental fluorosis characterized by chalky white, yellow, or brown colors.

    <p>True</p> Signup and view all the answers

    Congenital syphilis can lead to enamel hypoplasia in permanent incisors and first molars.

    <p>True</p> Signup and view all the answers

    Ingestion of lead during tooth development can result in enamel hypoplasia.

    <p>True</p> Signup and view all the answers

    Anodontia can lead to the failure of the alveolar process to develop, making it difficult to support dental implants.

    <p>True</p> Signup and view all the answers

    Supernumerary teeth can only form in the dental arches due to the cleavage of existing tooth buds.

    <p>False</p> Signup and view all the answers

    Natal and neonatal teeth may be primary or supernumerary to the normal teeth.

    <p>True</p> Signup and view all the answers

    Deciduous teeth usually erupt unobstructed, but permanent teeth may be obstructed due to factors like loss of space, overcrowding, and developmental defects.

    <p>True</p> Signup and view all the answers

    Microdontia can only affect a single tooth, not multiple teeth.

    <p>False</p> Signup and view all the answers

    True generalized macrodontia is common in individuals with small jaws.

    <p>False</p> Signup and view all the answers

    Developmental defects in enamel can be localized or generalized, with Turner's tooth being the most common generalized defect.

    <p>False</p> Signup and view all the answers

    Amelogenesis imperfecta is a genetic disorder affecting the enamel of the teeth.

    <p>True</p> Signup and view all the answers

    Macrodontia is a condition where one or more teeth in the dentition are smaller than normal.

    <p>False</p> Signup and view all the answers

    Natal and neonatal teeth are observable within the first 60 days of life.

    <p>False</p> Signup and view all the answers

    Supernumerary teeth include paramolar, mandibular and maxillary premolars, and maxillary lateral incisors.

    <p>True</p> Signup and view all the answers

    Amelogenesis imperfecta is caused by trauma or chronic periapical infection.

    <p>False</p> Signup and view all the answers

    Study Notes

    • The text discusses various abnormalities in the number, structure, and size of teeth.

    • Hypodontia: Some people have fewer teeth than normal, ranging from a few missing teeth to total anodontia.

    • Down's syndrome is the most common condition associated with hypodontia.

    • Anodontia leads to the failure of the alveolar process to develop, making it difficult to support dental implants.

    • Supernumerary teeth, or extra teeth, can form in the dental arches due to the cleavage of existing tooth buds or the formation of new ones.

    • The most common supernumerary teeth are the mesiodens (between the maxillary central incisors) and distomolar (distal to the third molar).

    • Other supernumerary teeth include paramolar, mandibular and maxillary premolars, and maxillary lateral incisors.

    • Natal and neonatal teeth are those observable at birth or within the first 30 days of life, and may be primary or supernumerary to the normal teeth.

    • Deciduous teeth, or baby teeth, usually erupt unobstructed, but permanent teeth may be obstructed by various factors like loss of space, overcrowding, and developmental defects.

    • Microdontia: One or more teeth in the dentition are smaller than normal. This can be generalized or affecting a single tooth, with the maxillary lateral incisors and third molars being the most commonly affected.

    • Macrodontia: One or more teeth in the dentition are larger than normal. True generalized macrodontia is rare, but relative macrodontia can occur in individuals with small jaws.

    • Disturbance in the structure of teeth:

      • Developmental defects in enamel: Can be localized or generalized, with Turner's tooth being the most common localized defect caused by trauma or chronic periapical infection.
      • Amelogenesis imperfecta is a genetic disorder affecting the enamel of the teeth, with various types based on the defects in enamel formation and mineralization.

    • The text discusses various abnormalities in the number, structure, and size of teeth.

    • Hypodontia: Some people have fewer teeth than normal, ranging from a few missing teeth to total anodontia.

    • Down's syndrome is the most common condition associated with hypodontia.

    • Anodontia leads to the failure of the alveolar process to develop, making it difficult to support dental implants.

    • Supernumerary teeth, or extra teeth, can form in the dental arches due to the cleavage of existing tooth buds or the formation of new ones.

    • The most common supernumerary teeth are the mesiodens (between the maxillary central incisors) and distomolar (distal to the third molar).

    • Other supernumerary teeth include paramolar, mandibular and maxillary premolars, and maxillary lateral incisors.

    • Natal and neonatal teeth are those observable at birth or within the first 30 days of life, and may be primary or supernumerary to the normal teeth.

    • Deciduous teeth, or baby teeth, usually erupt unobstructed, but permanent teeth may be obstructed by various factors like loss of space, overcrowding, and developmental defects.

    • Microdontia: One or more teeth in the dentition are smaller than normal. This can be generalized or affecting a single tooth, with the maxillary lateral incisors and third molars being the most commonly affected.

    • Macrodontia: One or more teeth in the dentition are larger than normal. True generalized macrodontia is rare, but relative macrodontia can occur in individuals with small jaws.

    • Disturbance in the structure of teeth:

      • Developmental defects in enamel: Can be localized or generalized, with Turner's tooth being the most common localized defect caused by trauma or chronic periapical infection.
      • Amelogenesis imperfecta is a genetic disorder affecting the enamel of the teeth, with various types based on the defects in enamel formation and mineralization.

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    Developmental Disturbances of Teeth PDF

    Description

    Learn about developmental disturbances of teeth in this oral pathology quiz. Explore the various conditions that affect teeth from conception to post-birth and understand the terminology related to developmental anomalies involving teeth.

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