DHS- Patho- Dental Anomalies
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Questions and Answers

What is the most common type of impaction?

  • Maxillary third molars
  • Maxillary second molars
  • Maxillary canines
  • Mandibular third molars (correct)
  • What are the potential complications of impaction?

  • Gum recession and enamel erosion
  • Root resorption and periodontal disease (correct)
  • Tooth discoloration and sensitivity
  • Gingivitis and cavities
  • What are the treatment options for impaction?

  • Observation and orthodontic extraction
  • Surgical removal and orthodontically-assisted eruption (correct)
  • Laser therapy and enamel restoration
  • Medication and natural eruption
  • What are the common causes of impaction?

    <p>Overlying cysts or tumors</p> Signup and view all the answers

    What is total failure of tooth eruption known as?

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

    Which dental anomaly refers to the lack of development of one or more teeth?

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

    In which region is hyperdontia more common?

    <p>Maxillary incisor region</p> Signup and view all the answers

    What does dental transposition involve?

    <p>Normal teeth erupting into an inappropriate position</p> Signup and view all the answers

    Which dental anomaly refers to teeth larger than normal?

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

    What is ankylosis in dental development?

    <p>Cessation of eruption after emergence</p> Signup and view all the answers

    What is the hereditary alteration in tooth structure involving enamel?

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

    Which developmental alteration results in the appearance of a larger tooth but leaves a missing tooth in the dental arch?

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

    Which hereditary disorder of dentin is caused by mutations of the DSPP gene?

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

    What type of amelogenesis imperfecta leads to soft enamel easily lost, with diffuse and snow-capped types?

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

    Which gene is involved in amelogenesis imperfecta with taurodontism?

    <p>KLK4</p> Signup and view all the answers

    What is the term for a hereditary alteration in the structure of dentin that causes the primary teeth to have a blue to amber to brown translucence, similar to dentinogenesis imperfecta?

    <p>Dentin dysplasia type II (DD-II; coronal dentin dysplasia)</p> Signup and view all the answers

    Which hereditary alteration in the structure of dentin is referred to as rootless teeth due to the loss of organization of the root dentin often leading to a shortened root length?

    <p>Dentin dysplasia type I (DD-I; radicular dentin dysplasia)</p> Signup and view all the answers

    What is the term for a localized, nonhereditary developmental abnormality of teeth with extensive adverse effects on the formation of enamel, dentin, and pulp?

    <p>Regional odontodysplasia – Ghost Teeth</p> Signup and view all the answers

    Which dental anomaly typically affects a focal area of the dentition, with involvement of several contiguous teeth, demonstrating small irregular crowns that are yellow to brown, often with a very rough surface?

    <p>Regional odontodysplasia – Ghost Teeth</p> Signup and view all the answers

    What is the term for the hereditary alteration in the structure of dentin that causes clinically normal crowns but radiographically shows shortened roots, absence of pulp canals, and small, crescent-shaped pulp chambers?

    <p>Dentin dysplasia type I (DD-I; radicular dentin dysplasia)</p> Signup and view all the answers

    What is the primary characteristic of Dentin dysplasia type II (DD-II; coronal dentin dysplasia)?

    <p>Blue to amber-to-brown translucence in primary teeth</p> Signup and view all the answers

    What is the radiographic appearance of teeth affected by Dentin dysplasia type I (DD-I; radicular dentin dysplasia)?

    <p>Shortened roots, absence of pulp canals, and small, crescent-shaped pulp chambers</p> Signup and view all the answers

    What is the defining feature of Regional odontodysplasia – Ghost Teeth?

    <p>Extremely thin enamel and dentin surrounding an enlarged radiolucent pulp</p> Signup and view all the answers

    What is the common radiographic feature of Dentinogenesis Imperfecta and Dentin dysplasia type II (DD-II)?

    <p>Bulbous crowns</p> Signup and view all the answers

    What distinguishes Hereditary alterations in the structure of dentin Dentin dysplasia type I (DD-I; radicular dentin dysplasia) from Dentin dysplasia type II (DD-II; coronal dentin dysplasia)?

    <p>Shortened roots and absence of pulp canals</p> Signup and view all the answers

    Study Notes

    Developmental and Hereditary Dental Alterations

    • Fusion of two teeth results in the appearance of a larger tooth, counted as one unit but leaves a missing tooth in the dental arch.
    • Developmental alterations in tooth shape include concrescence, accessory cusps, dens evaginatus, dens invaginatus, ectopic enamel, taurodontism, hypercementosis, dilaceration, and supernumerary roots.
    • Hereditary alterations in tooth structure involve enamel (amelogenesis imperfecta) and dentin (osteogenesis imperfecta, dentinogenesis imperfecta, dentin dysplasia).
    • Amelogenesis imperfecta has 14 hereditary subtypes: hypoplastic, hypocalcified, and hypomaturation, each with specific characteristics.
    • Hypoplastic amelogenesis imperfecta has several types, including generalized pitted, localized pitted, diffuse smooth, and rough, as well as enamel agenesis.
    • Hypocalcification amelogenesis imperfecta leads to soft enamel easily lost, with diffuse and snow-capped types.
    • Hypomaturation amelogenesis imperfecta results in mottled, opaque discoloration and softer enamel, with diffuse and snow-capped types.
    • Amelogenesis imperfecta with taurodontism involves genes like AMELX, ENAM, KLK4, and DLX3.
    • Hereditary disorders of dentin include isolated or syndrome-associated conditions like osteogenesis imperfecta, Ehlers-Danlos syndrome, Goldblatt syndrome, Schimke immuno-osseous dysplasia, vitamin-D resistant rickets, and vitamin-D dependent rickets.
    • Dentinogenesis imperfecta (DGI) is caused by mutations of the DSPP gene, affecting both dentitions with blue-to-brown discoloration and translucency.
    • Dental alterations like concrescence, dens evaginatus, and dilaceration can be idiopathic or due to trauma.
    • Hereditary alterations in tooth structure involve complex genetic factors and can affect enamel and dentin formation.

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    Description

    Test your knowledge of developmental and hereditary dental alterations with this quiz. Explore conditions such as fusion of teeth, enamel and dentin disorders, amelogenesis imperfecta subtypes, and genetic factors impacting tooth structure. Ideal for dental students and professionals seeking to deepen their understanding of dental anomalies.

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