Aging By Teeth – 19 – 24 years (Early Senior Horses)

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Reviewing these images is a long process if you go through the whole set. The idea is to notice all the differences and variability seen within each age. Then, as the age becomes greater, notice the increased variability. Also, note that some horses’ left and right sides are different, yielding a different age. The difference is caused by the horse’s tongue movement, jaw movement or both. The image data is the evidence I give for the horse’s age.

I call this group between 19 and 24 years the “Early Senior Horses.”

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See all the images below along with details for each age.

 

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19 year olds

  • “Galvayne’s groove” is an indentation (or groove) that occurs on the upper corner incisors (103 and 203).
  • It is located on the labial surface and parallels the front and back edge of the tooth.
  • Between 10 and 20 years it will progressively extend the length of the tooth.
  • Between 21 and 30 years it will progressively disappear starting at the gum line until it is gone by 30.
  • The groove at the gum line elongates slightly more along the length of the tooth to almost the full length of the tooth in the 19th year of eruption.

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20 year olds

  • “Galvayne’s groove” is an indentation (or groove) that occurs on the upper corner incisors (103 and 203).
  • It is located on the labial surface and parallels the front and back edge of the tooth.
  • Between 10 and 20 years, it will progressively extend the length of the tooth.
  • Between 21 and 30 years, it will progressively disappear, starting at the gum line until it is gone by 30.
  • The groove at the gum line elongates slightly more along the length of the tooth to the entire length of the tooth in the 20th year of eruption.
  • Galvayne’s Groove the full length at 20.”

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21 year olds

  • “Galvayne’s groove” is an indentation (or groove) that occurs on the upper corner incisors (103 and 203).
  • It is located on the labial surface and parallels the front and back edge of the tooth.
  • Between 10 and 20 years it will progressively extend the length of the tooth.
  • Between 21 and 30 years it will progressively disappear starting at the gum line until it is gone by 30.
  • The groove at the gum line slightly disappears along the length of the tooth starting at the gum line in the 21st year of eruption.

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22 year olds

  • “Galvayne’s groove” is an indentation (or groove) that occurs on the upper corner incisors (103 and 203).
  • It is located on the labial surface and parallels the front and back edge of the tooth.
  • Between 10 and 20 years it will progressively extend the length of the tooth.
  • Between 21 and 30 years it will progressively disappear starting at the gum line until it is gone by 30.
  • The groove at the gum line slightly disappears along the length of the tooth starting at the gum line in the 22nd year of eruption.

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23 year olds

  • “Galvayne’s groove” is an indentation (or groove) that occurs on the upper corner incisors (103 and 203).
  • It is located on the labial surface and parallels the front and back edge of the tooth.
  • Between 10 and 20 years it will progressively extend the length of the tooth.
  • Between 21 and 30 years it will progressively disappear starting at the gum line until it is gone by 30.
  • The groove at the gum line slightly disappears along the length of the tooth starting at the gum line and is about ¼ gone in the 23rd year of eruption.

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24 year olds

  • “Galvayne’s groove” is an indentation (or groove) that occurs on the upper corner incisors (103 and 203).
  • It is located on the labial surface and parallels the front and back edge of the tooth.
  • Between 10 and 20 years it will progressively extend the length of the tooth.
  • Between 21 and 30 years it will progressively disappear starting at the gum line until it is gone by 30.
  • The groove at the gum line slightly disappears along the length of the tooth starting at the gum line and is about 1/3 gone in the 24rd year of eruption.

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