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

This is a long process if you are going through the whole set. The idea is to notice all the differences and variability seen within each age. As the age becomes greater, notice the increased variability. Also note that in some horses, the left and right sides are different yielding a different age. This is caused by the horse’s tongue movement, jaw movement or both. The image data is the evidence I was given for the age of the horse.

I call this group between 19 and 24 years the “early senior horses.”

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.

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 full length of the tooth in the 20th year of eruption.
• Galvayne’s Groove the full length at 20.”

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.

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.

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.

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.