Difference between revisions of "Dental Formula - Horse"
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[[Image:Horse teeth.jpg|thumb|right|150px|Tooth identifation in the horse- copyright Academy of Equine Dentistry-2008]] | [[Image:Horse teeth.jpg|thumb|right|150px|Tooth identifation in the horse- copyright Academy of Equine Dentistry-2008]] | ||
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| − | + | ==Overview== | |
| − | 2 (I3/3 | + | The formula for deciduous teeth: 2 (I3/3 C0/0 P3/3) |
| − | + | The formula for permanent teeth: 2 (I3/3 C1/1 P3-4/3 M3/3) | |
| − | + | ===Canines=== | |
| − | + | The canines are rudimentary and in diastema. The size of the [[Root - Anatomy & Physiology|root]] is proportionally larger than the [[Crown|crown]]. | |
| − | + | ===Molars=== | |
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[[Image:Horse Tooth.jpg|thumb|right|150px|Horse tooth - Copyright Malcom Morley]] | [[Image:Horse Tooth.jpg|thumb|right|150px|Horse tooth - Copyright Malcom Morley]] | ||
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| − | + | The molars have enlarged surfaces and higher [[Crown|crowns]]. They have delayed [[Root - Anatomy & Physiology|root]] development and complicated folding of [[Enamel|enamel]]. | |
| − | + | ===Incisors=== | |
*High [[Crown|crowns]] | *High [[Crown|crowns]] | ||
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[[Category:Teeth - Anatomy & Physiology]] | [[Category:Teeth - Anatomy & Physiology]] | ||
[[Category:Horse - Alimentary System]] | [[Category:Horse - Alimentary System]] | ||
| − | [[Category:To Do - | + | [[Category:To Do - AimeeHicks]] |
Revision as of 16:44, 7 September 2010
Overview
The formula for deciduous teeth: 2 (I3/3 C0/0 P3/3)
The formula for permanent teeth: 2 (I3/3 C1/1 P3-4/3 M3/3)
Canines
The canines are rudimentary and in diastema. The size of the root is proportionally larger than the crown.
Molars
The molars have enlarged surfaces and higher crowns. They have delayed root development and complicated folding of enamel.
Incisors
- High crowns
- Folded enamel surfaces
- Roots converge
Premolars
- Wolf tooth (PM1) often lacking
- Molars and Premolars form a continuous surface
- High rate of wear
- Continually erupt
- Upper teeth wider than lower
- No infundibulum in lower teeth
Ageing
- Horses can be aged by their teeth
- At 2 and a half the first permanent incisor will erupt
- At 3 and a half the second permanent incisor will erupt
- At 4 and a half the third permanent incisor will erupt
- Over 5 years of age the folding of the enamel ring (infundibulum) can indicate age
- 7 year hook
- Over 13 years of age a dental star will be present
- The Galvayne's Groove is a brown groove on the upper corner incisor teeth and indicates that the horse is over 10 years old
- At 15 the groove will be approximately half way down the tooth
- At 20 the groove will run down the whole tooth
- Over 20 the grove begins to disappear
- At 25 the groove will only be visible on the bottom half of the tooth
- At 30 the groove will usually be gone