Aging By Teeth – View Open Mouth

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.

Note, in the open view: The labial gum line moves further down the tooth (look at the inside of the lower incisors). The movement of the tongue over time can cause this, but it can also be from EOTRH in older horses.

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
2yr old
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
2/13/2010 = 03yr 10mo Mini M
3/30/2010 = 03yr 3mo
2 and 3-year-olds – Central lower permanent incisors (301/401) in the 3-year-olds but also in one 2-year-old. NOTE: one horse has lost the lower middle deciduous incisor (82 – blood) which has displaced the permanent 402 out of alignment.

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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 A with trauma causing the loss of 101 and 102 plus deforming the lower incisors with a retained 81
Incisors out of position in a 04yr.
4 year old with the permanent upper corner incisor visable.
Incisors out of position in a 04yr.
4-year-olds – Central and middle incisors are permanent (3/401 and 3/402).  3 horses have their lower corner incisors erupting. 1 horse has a central incisor cap displaced towards the lip at 401.  NOTE the formations of an indentation on the occlusal surface on several lower middle and central incisors – these are called “cups.”

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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 – “Full mouth at 5.”  However, it is common for 5-year-olds to still have deciduous corner incisors.  The cups are clearly seen on some teeth and not in others.

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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
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 – the cups should disappear on the central lower incisors at 6 years.

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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 cups should disappear on the central and middle lower incisors at 7 years.

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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
8yr 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 cups should disappear on all the lower incisors at 8 years. NOTE delayed shedding of deciduous teeth can cause misalignment of the teeth but will self-correct over time.

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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 – all cups should be gone by 9 years but as you can see, 3 horses still have cups.

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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
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 cross-section shape of the teeth should have changed from an oval (see the younger ages) to triangular in shape by 10 years.  Over time these will change again to a more round shape.

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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 “dental star’ is often hard to see but in these 11-year-olds, the black dot on the occlusal surface can be seen.  The dental stars are caudal (away from the lip side) to the area where the cup was. 3 horses here have the remnants of the cups on the lip side of the teeth while the dental star is just next to them, further away from the lip.

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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 – dental stars and cups are variably seen.  The cross-sectional shape moves towards being round.

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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 – Cap remnant next to 403
3/16/2000 = 13yr 3mo
3/13/2000 = 13yr 2mo WB G – Horse A – relaxed incisors in a natural position
13-year-olds – dental stars and cups are variably seen.  The cross-sectional shape moves towards being round.

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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
Charleston 14 yr Fresian Sport Horse G
14-year-olds – dental stars and cups are variably seen.  The cross-sectional shape moves towards being round.

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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 – dental stars and cups are variably seen.  The cross-sectional shape moves towards being round.

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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 – dental stars and cups are variably seen.  The cross-sectional shape moves towards being round.

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Maggie 17yr QH M
1/3/1996 = 17yr 6mo Paso Fino M
17-year-olds – dental stars and cups are variably seen.  The cross-sectional shape moves towards being round.

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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 – Mild signs of EOTRH are being seen (gum line hypertrophy of incisors and canines, gum recession).

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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 – Mild signs of EOTRH are being seen (gum line hypertrophy and canines, gum recession).

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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
5/5/1994 = 20yr 1 mo TB G tattoo = X
20-year-olds – Mild signs of EOTRH are being seen (gum line hypertrophy and canines, gum recession).

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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
2/26/1993 = 21yr 4 mo TB G
21-year-olds – Mild signs of EOTRH are being seen (gum line hypertrophy and canines, gum recession).

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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
22-year-olds – Mild signs of EOTRH are being seen (gum line hypertrophy and canines, gum recession).

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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 – Mild signs of EOTRH are being seen (gum line hypertrophy and canines, gum recession). NOTE 1 horse has lost all of the lower incisors from EOTRH (2 remnants remain) and another horse has a fractured lower left corner incisor (304).

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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 – Mild signs of EOTRH are being seen (gum line hypertrophy and canines, gum recession).

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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 – Mild signs of EOTRH are being seen (gum line hypertrophy and canines, gum recession).

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5/5/1988 26yr QH G
5/5/1987 = 26yr = Q TB G
26-year-olds – Mild signs of EOTRH are being seen (gum line hypertrophy and canines, gum recession).

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7/29/1986 = 27yr 3mo WB S. – misaligned incisors
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
27-year-olds – Mild signs of EOTRH are being seen (gum line hypertrophy and canines, gum recession).

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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 – Mild signs of EOTRH are being seen (gum line hypertrophy and canines, gum recession).

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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 – Signs of EOTRH are being seen (gum line hypertrophy and canines, gum recession, decay, fractured teeth, absent teeth, red and inflamed gums).

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Categories: 2_Topics, Aging Project

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