Aging By Teeth – 13 – 18 years (Adult Horses)

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 13 and 18 years the “Adult Horses.”

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⬇︎ Click or tap on any image to fully open it. Swipe or click the arrow to move through the gallery. ⬇︎

13-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 approximately ¼ the length of the tooth in the 13th year of eruption.

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14-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, approximately 1/3 the length of the tooth in the 14th year of the eruption.

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15-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, approximately 1/2 the length of the tooth in the 15th year of the eruption.
  • Galvayne’s Groove half the length at 15.”

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16-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 a little over half the length of the tooth in the 16th year of eruption.

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17-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, a little over half the length of the tooth in the 17th year of the eruption.
  • (I don’t know why I could only find 2 horses who were 17-year-olds!)

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18-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 about ¾ the length of the tooth in the 18th year of eruption.

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