Aging By Teeth – View Left Side

Doc-t August 8, 2020
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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.

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.

Aging by teeth

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

4/22/2011 = 02yr 7mo TB M no tattoo
2/11/2011 = 02yr 9mo TB M tattoo = O 2011
3/2/2011 = 02yr 8mo TB S tattoo = O 2011
tattoo = O = 2011 = 02yr TB M
4/23/2011 = 02yr 7mo TB G no tattoo
2-year-olds – all incisor teeth are deciduous.

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2/13/2010 = 03yr 10mo Mini M
2/11/2010 = 03yr 9mo TB M tattoo = N 2010
4/30/2010 = 03yr 7mo TB G tattoo = N 2010
4/20/2010 = 03yr 7mo TB G – tattoo = N=2010
3/17/2010 = 03yr 8mo TB G
03yr TB S tattoo = N = 2010
03yr TB S N tattoo = 2010
3/30/2010 = 03yr 3mo
3-year-olds – the middle and corner incisors are deciduous.

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4/16/2010 = 04yr 2mo WB mare
4/11/2010 = 04yr 2mo WB G
1/21/2009 = 04yr 10mo Mini M
6/24/2009 = 04yr 2mo Morgan G
2/15/2009 = 04yr 5mo TB M
4/3/2009 = 04yr 3mo TB M
2/1/2009 = 04yr 5mo TB M
6/28/2009 = 04yr WB M
4/22/2009 = 04yr 1mo TB G Horse B – This could be either an overbite or a parrot mouth but is hard to tell because of the missing teeth and deformed jaw in this 4-year-old TB G
4 year old with the permanent upper corner incisor visable.
4-year-olds – only the corner incisor is deciduous though some permanent teeth are erupting and one has the corner incisors in wear already.

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3/04/2009 = 05yr WB G
7/20/2008 = 05yr 4mo WB M
5/25/08 = 05yr 6mo – Zangershire M
2/17/2008 Tattoo = L = 05yr 9mo TB G
5/29/2008 = 05 yr 3mo WB G
4/16/2008 = 05yr 4mo Morgan M
4/8/2008 = 05yr 3mo TB M
TB w/ tatto “L” = 2008 = 05yr
5/14/2008 = 05 years 1 month Frisian
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.

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3/3/2008 = 06yr 3mo WB G
5/9/2008 = 06yr 1mo WB G
4/12/2008 = 06yr Belgian WB G
5/24/2007 = 06yr 5mo WB M – Horse M – Abnormally shaped #303
Feb 14, 2007 = 06yr 6mo Appaloosa G
2007= 06yr Hanovarian M
5/25/2007 = K = 06yr 2mo TB G
5/25/2007 = 06yr 2mo Trote y Galope G
5/5/2007 = 06yr G WB
6-year-olds – all incisors are permanent except for 1 horse with a lower corner incisor firmly in place with a long root seen under the gum. 7 of these horses have erupted lower canines with some of them also showing upper canines. Remember canines are almost always in male horses.

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4/25/2007 = 07yr old Gypsy Vanner mare – note the 305 canine in this dominant mare
4/29/2007 = 07yr Tattoo = K TB G (just castrated)
2/18/2006 = 07yr 7 mo
Feb 26, 2006 = 07yr 6mo TB G tattoo = J
2006 = 07yr tattoo = J TB G
4/26/2006 = 07yr 4mo
2/9/2006 = 07yr 5mo TB M
6/2/2006 = 07yr 1mo WB G
10/7/2006 = 07yr
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.

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2/15/2006 = 8 yr old WB G
10/23/2006 = 08yr WB G (born in Argentina)
5/21/2006 = 08yr 1mo WB G
5/13/2006 = 08yr 0 mo QH mare
4/12/2006 = 08yr TB G who cribs. Tattoo = J
4/15 2005 = 08yr 4mo tattoo = I TB G
4/16/2005 = 08yr 4mo WB M
7/3/2005 = 08yr 0mo Rocky Mountain Horse mare
5/28/2005 = 08yr Hackney G
4/15/2005 = 08yr TB G Tattoo I = 2005
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.

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3/11/2005 =09yr 2mo TB G Tattoo = I
4/15/2005 09yr 1mo Oldenburg G
4/24/2005 = 09yr WB G
2/18/2004 = 09yr 9mo – Zangershire G
5/13/2004 = 09yr 4mo
5/15/2004 = 09yr 3mo M
5/3/2004 = 09yr tattoo = H TB G
2/27/2004 = 09yr 3mo WB G
3/19/2004 = 09yr QH G
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.

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Ollie 10yr Paint G
5/20/2004 = 10yr WB G
5/15/2004 = 10yr Morgan M
2003 = 10yr tattoo = G TB M
7/12/2003 = 10yr 1mo Fresian G
2/18/2003 = 10yr 6mo QH G – lower incisors are in a straight line
5/16/2003 = 10yr 2mo TB M
3/23/2003 = 10yr QH G
10yr 4/17 2003 = 10yr TB Irish Sporthorse M
5/17/2003 = 10yr 0mo WB G
10/15/2002 = 10yr 5mo WB G
10-year-olds – The variability of Galvayne’s Groove is clearly evident from no groove to extending halfway down the corner incisor.

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5/15/2002 = 11yr 4mo
April 27, 2002 = 11yr 4mo Mini G
5/15/2002 = 11yr 3mo = F tattoo TB G
2/23/2002 = 11yr 5mo TB M
4/5/2002 = 11yr 4mo TB M
4/10/2002 = 11yr TB M
1/1/2002 = 11yr tattoo = F TB G
1/24/2002 = 11yr 4mo TB G
4/24/2002 = 11yr
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.

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4/24/2002 = 12yr 1mo QH G saw papers
1/12/2001 = 12yr 8 mo 8 mo
2/1/2001 = 12yr 7mo tattoo = E TB G
3/20/2001 = 12yr 3mo Sunday, Melissa Buday
3/30/2001 = 12yr QH M
4/24/2001 = 12yr G grade
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.

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6/6/2001 13yr Tennessee Walker G
4/16/2000 = 13yr 6mo
5/26/2000 = 13yr 3 mo
3/21/2000 = 13yr 5mo TB G tattoo = D
4/15/2000 = 13yr 4mo Morgan M
12/5/2000 = 13yr 8mo WB G
5/3/2000 = D 2000 = 13yr TB G
1/7/1999 = 13yr 6mo Trot y Galope S
5/11/2000 = 13yr 2mo WB G
3/28/2000 = 13yr 3mo
3/16/2000 = 13yr 3mo
3/13/2000 = 13yr 2mo WB G – Horse A – relaxed incisors in a natural position
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.

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Charleston 14 yr Fresian Sport Horse G
tattoo = C = 14yr TB G
May 30, 1999 = 14yr Trakehner G
4/24/1999 = 14yr 3mo TB M
1/1/1999 = 14yr G TB tattoo = C = 1999
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.

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4/6/1998 = 15yr 6mo WB M
4/24/1998 = 15yr 5mo M QH
1998 15yr old
5/16/1998 = 15yr 3mo Morgan S
7/19/1998 = 15yr Hackney G
2/12/1998 = B= 15yr 5mo
6/28/1998 = 15yr Mini M
4/1/1998 = 15yr QH M
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.

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2/15/1998 = 16yr 4mo QH M
3/21/1998 = 16yr 3mo Mini M
5/28/1998 = 16yr 1mo Mini M
2/10/1997 = 16yr 7mo QH G
6/26/1997 = 16yr 2mo WB G
May 12, 1997 = 16yr Reg APH mare
2/14/1997 = 16yr 5mo – Horses G (presumptive) – Early stage of EOTRH? hyperlpasia around canines, #404 early necrosis, bulbous appearance of incisors. No pain of difficulty in using incisors.
2/22/1997 = 16yr 4mo
5/15/1997 = 16yr
1/15/1997 = 16yr 4mo WB G
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.

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Maggie 17yr QH M
1/3/1996 = 17yr 6mo Paso Fino M
17-year-olds – Galvayne’s Groove is variable.

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5/27/1997 = 18yr TB G
5/1/1995 = 18yr 4mo, Horse I – moderate EOTRH
6/19/1995 = 18yr American Hanovarian M
7/1/1995 = 18yr Columbian Trocha M
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.

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4/20/1995 = 19yr 3 mo WB G
Betty 19 yr App M
05/06/1995 = 19yr WB G
5/1/1994 = 19yr 6mo WB G
7/31/1994 = 19yr WB G
3/9/1994 = 19yr 3mo
3/2/1994 = 19yr 3mo M
1/1/1994 = 19yr TB (Jan 1st) G Tatto = “X” 1994 + papers
8/8/1994 = 19yr 10 mo M Appaloosa
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.

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4/23/1994 = 20yr 1 mo TB G
3/11/1994 = 20yr old Arabian gelding
4/11/1993 = 20yr = W (partial) TB G – Horses G (presumptive) – Receding gum line, bulbous incisors, hypertrophy of gum line
12/20/1992 = 20yr 6mo Trot y Galope G
1/1/1993 = 20yr 6mo Mini G
5/7/1993 = 20yr M Paint
6/14/1993 = 20yr QH G – Horse B – 20 yr QH with relaxed incisors in a natural position
5/5/1994 = 20yr 1 mo TB G tattoo = X
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.

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Dreamer 21yr QH G
10/2/1992 = 21yr DWB G
7/4/1992 = 21yr WB G
4/30/1992 = 21yr warmblood G
3/13/1992 = 21yr 2mo Lg Pony G – Horse C with relaxed incisors in a natural position
2/26/1993 = 21yr 4 mo TB G
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.

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4/25/1992 = 22yr TB G
6/25/1991 = 22yr 5mo WB G
5/24/1991 = 22yr TB M
4/15/1991 = 22yr Lipizaner G – Horse D with relaxed incisors in a natural position
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.”

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4/9/1991 = 23yr 2mo TB G tattoo = U
1/5/1991 = 23yr 4mo Apend QH Mare
2/12/1991 = 23yr TB G
4/14/1990 = 23yr 5mo Andalusian M
4/7/1990 = 23yr 4mo WB M
5/10/1990 = 23yr WB G
Tattoo = T = 1990 = 23yr Horse E had all his lower incisors and the start of EOTRH in 2010 (see the 1st pictures I have of him). He has no trouble chewing and is fed 8 quarts of grain a day plus hay and pasture. His weight loss since 2010 may be age or being moved to a new home 1000 miles away.
5/16/1990 = 23yr 1mo TB G Oliver Tucker
4/13/1990 = 23yr WB G
3/30/1990 = 23yr QH M
6/30/1991 = 23yr Hanovarian M
23-year-olds

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3/30/1990 = 24yr 2mo QH G saw papers
1/1/1989 = 24yr TB G
1/31/1989 = 24yr QH G – Horse E with relaxed incisors in a natural position –
6/18/1989 = Tattoo = S = 24yr 11mo TB M
24-year-olds

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1/1/1988 = 25yr 6mo TB G Tattoo = R
25yr old
5/1/1988 = 25yr QH M
5/3/1989 = 25yr 1mo TB G tattoo = S
25-year-olds

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5/5/1988 26yr QH G
5/5/1987 = 26yr = Q TB G
26-year-olds

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27yr 7/29/1986 = 27yr 3mo WB S – Presumptive EOTRH, Underbite
4/18/1986 = 27yr 6 mo
March 23, 1986 = 27yr 6 mo TB M Tattoo = P
4/14/1986 = 27yr 3 mo Dutch WB G
3/31/1986 = 27yr EOTRH – #304 necrotic
27-year-olds

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2/4/1986 = 28yr 6mo Arab M
3/9/1986 = 28yr 3mo Fresian G
Josh 28yr Arab G
7/17/1985 = 28yr 3mo WB M
28yr QH G
28-year-olds

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5/23/1984 = N = 29yr TB G
30yr plus
4/5/1980 = 34yr 4mo Arab G
4/10/1983 = 31 yr 3 mo Arab G 30yr_plus
5/16/1982 = 32yr Hackney M 30yr_plus
37 year old born 1977 pony G 30yr_plus
3/19/1980 QH G = 34 yr old 30yr_plus
4/13/1981 = 32 yr QH G 30yr_plus
June 6, 1978 = 35y yr QH G 30yr_plus
3/26/1981 = 32 yrs 30yr_plus – EOTRH
5/16/1982 = 31yr G QH bay – 30yr_plus Naturally opened mouth with ½ cheek teeth. Also tongue as cause of sharp canines and angle of incisors.
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 the decay of the incisors (dark spots).

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Categories: 2_Topics, Aging Project Topics

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