Age Estimation in Horses: Dentition Examination
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Questions and Answers

What is the dental star primarily composed of in equine incisor teeth?

  • Enamel infundibular bottoms
  • Primary dentin
  • Infundibula
  • Secondary dentin (correct)
  • Which indicator of age in equine incisor teeth is more variable and less reliable?

  • Infundibula or cups disappearance
  • Lingual apex in middle incisors (correct)
  • Oval-triangular marks on central incisors
  • Dental star appearance
  • In older horses, how does the curvature of the dental arch formed by the lower incisive tables change?

  • Round to triangular
  • Semicircular to trapezoidal
  • Elliptical to round
  • Semicircular to straight line (correct)
  • At what age do the marks disappear from the central incisors in equine teeth?

    <p>18 years</p> Signup and view all the answers

    Which age-related change occurs in the angle between upper and lower incisors as horses age?

    <p>The angle becomes more acute</p> Signup and view all the answers

    Study Notes

    Age Estimation in Horses through Dental Examination

    • Horses have hypsodont dentition, characterized by reserve crown length with continual eruption, which makes up for occlusal wear at a rate of approximately 2.5 mm/year until approximately 17 years of age.

    Characteristics of Horse Teeth

    • The lower incisors are the most suitable teeth for estimating age in horses.
    • With continuous eruption, exposure of occlusal dentin and cementum leads to the presence of three alternate calcified tissues on the occlusal surface.

    Deciduous and Permanent Dentition

    • Deciduous incisors are smaller than permanent ones, with whiter surfaces, and have several small longitudinal ridges and grooves.
    • Permanent incisors are larger, more rectangular in shape, and have crown surfaces largely covered with cement, giving a yellowish appearance.

    Upper and Lower Incisors

    • Upper incisors have two distinct longitudinal grooves on their labial surface.
    • Lower incisors have only one longitudinal groove on their labial surface.

    Radiographic Assessment

    • Radiographic assessment of cheek teeth for root morphology in young horses can aid in age determination.

    Variations and Limitations

    • Dental appearances are subject to individual and breed variations, as well as differences in environmental conditions.

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    Description

    Test your knowledge on estimating the age of horses by examining their dentition, with a focus on hypsodont dentition and the most appropriate teeth for age estimation. Learn about the rate of occlusal wear and how it relates to age in horses.

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