Aging By Teeth – View Right Side

Topic

  • In the left and right views: The tongue presses against the backs of the incisors. As the horse ages, the incisors are pushed forward.  This is from the tongue pushing them forward over time as it moves out of the mouth with each bite of grass.
  • In the left and right views of the male horses: Note the shaping of the canine teeth due to the stropping of the tongue. The action forms a dagger-like shape with a razor edge.

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.

Related Material

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

 

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Back To Introduction To Aging Horses By Their Teeth

2 year olds – all incisor teeth are deciduous.
3 year olds – the middle and corner incisors are deciduous (blood is from the removal of a cap).
4 year olds – only the corner incisor is deciduous though some permanent teeth are erupting and one has the corner incisors in wear already.
5 year olds – most have all their permanent incisors in wear but a few do not or the deciduous cap remains. Note one horse has erupted a lower canine tooth.
7 year olds – The “7-year hook” is forming on some of these corner incisors. Note the relaxed space and the filling of the tongue around the incisor and canines.
8 year olds – the corner “7-year hook” is not seen prominently.  Note how the tooth angle is variable with some more slanted.  The angle will increase with age.
9 year olds – The tooth angle increases. A “7-year hook” is seen. The nub of Galvayne’s Groove is starting at the gum line of several corner incisors.
10 year olds – The variability of Galvayne’s Groove is clearly evident from no groove to extending halfway down the corner incisor.
11 year olds – the “11-year hook” is not seen but in one horse. There is gum hypertrophy around 1 canine with blood indicating early onset of EOTRH. Tooth angles and Galvayne’s Groove are variable.
12 year olds – tooth angle and wear are variable. Gum recession, canine gum hypertrophy and gum indentations between the incisor roots are becoming evident and are early signs of EOTRH.
13 year olds – tooth angle and wear are variable. Gum recession, canine gum hypertrophy and gum indentations between the incisor roots are becoming evident and are early signs of EOTRH.
14 year olds – tooth angle and wear are variable. Gum recession, canine gum hypertrophy and gum indentations between the incisor roots are becoming evident and are early signs of EOTRH.
15 year olds – Galvayne’s Groove should be half the length of the corner incisor but in these images, it runs from not being evident to almost the full length of the tooth.
16 year olds – tooth angle and wear are variable. Gum recession, canine gum hypertrophy and gum indentations between the incisor roots are becoming evident and are early signs of EOTRH.
17 year olds – Galvayne’s Groove is variable.
18 year olds – Galvayne’s Groove is variable.  There is some gum recession and a ring of hypertrophy at the incisors of one horse that are early indicators of EOTRH.
19 year olds – Note the variable tooth angles and Galvayne’s Groove, and a corner incisor hook on one. gum recession, indentations between the incisor roots and decay of one corner incisor – all EOTRH signs.
20 year olds – Galvayne’s Groove is supposed to run the full length of the corner upper incisor tooth, but in these horses, it is variable.  EOTRH signs are in many of these horses.
21 year olds – note in these senior horses the increasing tooth angle and the placement of the tongue behind the incisors driving them forward with tens of thousands of pushes with each bite of food throughout the day.
22 year olds – One case of EOTRH with destruction and loss of upper and lower incisors, making aging impossible other than to say “senior horse.”
23 year olds
24 year olds
25 year olds
26 year olds
27 year olds
28 year olds
29 and 30+ year olds – EOTRH is affecting many of these horses including the one horse with red dots on the gums and the other with decay of the incisors (dark spots).

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