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.
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4/22/2011 = 02yr 7mo TB M no tattoo2/11/2011 = 02yr 9mo TB M tattoo = O 20113/2/2011 = 02yr 8mo TB S tattoo = O 2011tattoo = O = 2011 = 02yr TB M4/23/2011 = 02yr 7mo TB G no tattoo2yr old2/11/2010 = 03yr 9mo TB M tattoo = N 20104/30/2010 = 03yr 7mo TB G tattoo = N 20104/20/2010 = 03yr 7mo TB G – tattoo = N=20103/17/2010 = 03yr 8mo TB G03yr TB S tattoo = N = 201003yr TB S N tattoo = 20102/13/2010 = 03yr 10mo Mini M3/30/2010 = 03yr 3mo2 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.
4/16/2010 = 04yr 2mo WB mare4/11/2010 = 04yr 2mo WB G1/21/2009 = 04yr 10mo Mini M6/24/2009 = 04yr 2mo Morgan G2/15/2009 = 04yr 5mo TB M4/3/2009 = 04yr 3mo TB M2/1/2009 = 04yr 5mo TB M6/28/2009 = 04yr WB M4/22/2009 = 04yr 1mo TB G – Horse A with trauma causing the loss of 101 and 102 plus deforming the lower incisors with a retained 81Incisors 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.”
3/04/2009 = 05yr WB G7/20/2008 = 05yr 4mo WB M5/25/08 = 05yr 6mo – Zangershire M2/17/2008 Tattoo = L = 05yr 9mo TB G5/29/2008 = 05 yr 3mo WB G4/16/2008 = 05yr 4mo Morgan M4/8/2008 = 05yr 3mo TB MTB w/ tatto “L” = 2008 = 05yr5/14/2008 = 05 years 1 month Frisian5-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.
4/25/2007 = 07yr old Gypsy Vanner mare – note the 305 canine in this dominant mare4/29/2007 = 07yr Tattoo = K TB G (just castrated)2/18/2006 = 07yr 7 moFeb 26, 2006 = 07yr 6mo TB G tattoo = J2006 = 07yr tattoo = J TB G4/26/2006 = 07yr 4mo2/9/2006 = 07yr 5mo TB M6/2/2006 = 07yr 1mo WB G10/7/2006 = 07yr7-year-olds – the cups should disappear on the central and middle lower incisors at 7 years.
2/15/2006 = 8 yr old WB G10/23/2006 = 08yr WB G (born in Argentina)5/21/2006 = 08yr 1mo WB G5/13/2006 = 08yr 0 mo QH mare4/12/2006 = 08yr TB G who cribs. Tattoo = J4/15 2005 = 08yr 4mo tattoo = I TB G8yr 4/16/2005 = 08yr 4mo WB M7/3/2005 = 08yr 0mo Rocky Mountain Horse mare5/28/2005 = 08yr Hackney G4/15/2005 = 08yr TB G Tattoo I = 20058-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.
3/11/2005 =09yr 2mo TB G Tattoo = I4/15/2005 09yr 1mo Oldenburg G4/24/2005 = 09yr WB G2/18/2004 = 09yr 9mo – Zangershire G5/13/2004 = 09yr 4mo5/15/2004 = 09yr 3mo M5/3/2004 = 09yr tattoo = H TB G2/27/2004 = 09yr 3mo WB G3/19/2004 = 09yr QH G9-year-olds – all cups should be gone by 9 years but as you can see, 3 horses still have cups.
Ollie 10yr Paint G5/20/2004 = 10yr WB G5/15/2004 = 10yr Morgan M2003 = 10yr tattoo = G TB M7/12/2003 = 10yr 1mo Fresian G2/18/2003 = 10yr 6mo QH G – lower incisors are in a straight line5/16/2003 = 10yr 2mo TB M3/23/2003 = 10yr QH G4/17 2003 = 10yr TB Irish Sporthorse M5/17/2003 = 10yr 0mo WB G10/15/2002 = 10yr 5mo WB G10-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.
5/15/2002 = 11yr 4moApril 27, 2002 = 11yr 4mo Mini G5/15/2002 = 11yr 3mo = F tattoo TB G2/23/2002 = 11yr 5mo TB M4/5/2002 = 11yr 4mo TB M4/10/2002 = 11yr TB M1/1/2002 = 11yr tattoo = F TB G1/24/2002 = 11yr 4mo TB G4/24/2002 = 11yr11-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.
tattoo = C = 14yr TB GMay 30, 1999 = 14yr Trakehner G4/24/1999 = 14yr 3mo TB M1/1/1999 = 14yr G TB tattoo = C = 1999Charleston 14 yr Fresian Sport Horse G14-year-olds – dental stars and cups are variably seen. The cross-sectional shape moves towards being round.
Maggie 17yr QH M1/3/1996 = 17yr 6mo Paso Fino M17-year-olds – dental stars and cups are variably seen. The cross-sectional shape moves towards being round.
5/27/1997 = 18yr TB G5/1/1995 = 18yr 4mo, Horse I – moderate EOTRH6/19/1995 = 18yr American Hanovarian M7/1/1995 = 18yr Columbian Trocha M18-year-olds – Mild signs of EOTRH are being seen (gum line hypertrophy of incisors and canines, gum recession).
4/23/1994 = 20yr 1 mo TB G3/11/1994 = 20yr old Arabian gelding4/11/1993 = 20yr = W (partial) TB G – Horses G (presumptive) – Receding gum line, bulbous incisors, hypertrophy of gum line12/20/1992 = 20yr 6mo Trot y Galope G1/1/1993 = 20yr 6mo Mini G5/7/1993 = 20yr M Paint6/14/1993 = 20yr QH G5/5/1994 = 20yr 1 mo TB G tattoo = X20-year-olds – Mild signs of EOTRH are being seen (gum line hypertrophy and canines, gum recession).
