2 Determining Age Age affects usefulness and value Type, number and appearance of incisor teeth help determine correct age5 years or less – some combination range from all milk teeth (temporary teeth) to all permanent incisors6 to 12 years – number of cups (indentations) in permanent incisor teeth12 years & over – examine cross section and slant of incisor teeth
3 What’s the DifferenceTemporary Teeth – small, white, oval shaped; wider side to side than front to rearPermanent Teeth – yellow, larger than temporaries with a general round surfaceMolars – used for grinding on each sideIncisors – used for cutting
5 What’s the Difference3 sets of incisors – Centrals, Intermediates, Corner Incisors (6 upper & 6 lower)Incisors have a cup or indentation in center of tooth that wears down with age and ultimately disappears
6 The Numbers Make the Difference Immature horses – Total 24 temporary teethMature horses – Total permanent teethStallions & Geldings – permanentsWolf Tooth (Canine) – appears in front of upper molar teeth. Accounts for difference
9 The Breakdown1 year – All temporary incisors present / Cups gone from centrals2 year - All temporary incisors present / cups gone3 year - Temporary central incisors replaced with permanent central incisors
10 4 years -. Temporary intermediate incisors 4 years - Temporary intermediate incisors replaced with permanent intermediate incisors5 years – All temporary incisors replaced with permanent incisors. Horse is fullmouthed.6 years – Cups gone from lower central incisors7 years – Cups gone from lower intermediate incisors8 years - Cups gone from lower corner incisors
11 9 years - Cups gone from upper central incisors 10 years - Cups gone from upper intermediate incisors11 years - Cups gone from all incisors. Horseis smooth mouthed.
12 ExtrasA hook (worn edge) may appear on upper corner incisors at 7 to 11 yearsGalvayne’s Groove – Line that appears on the upper corner incisors around 10 to 11 years, gets longer as horse ages.Angle of Incidence – angle at which the incisor teeth meet. Increases and teeth wear down as horse ages.