Difference between revisions of "Dental Formula - Horse"
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(Created page with "===The Horse=== thumb|right|150px|Tooth identifation in the horse- copyright Academy of Equine Dentistry-2008 '''Dental Formula''' 2 (I3/3 C0/0 P3/3) ...") |
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− | + | ===The Horse=== | |
[[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]] | ||
+ | '''Dental Formula''' | ||
− | + | 2 (I3/3 C0/0 P3/3) Deciduous | |
− | + | 2 (I3/3 C1/1 P3-4/3 M3/3) Permanent | |
− | + | '''Canines''' | |
− | + | *Rudimentary | |
− | + | *In diastema | |
− | + | *Size of [[Root - Anatomy & Physiology|root]] is proportionally larger than [[Crown|crown]] | |
+ | |||
+ | '''Molars''' | ||
[[Image:Horse Tooth.jpg|thumb|right|150px|Horse tooth - Copyright Malcom Morley]] | [[Image:Horse Tooth.jpg|thumb|right|150px|Horse tooth - Copyright Malcom Morley]] | ||
+ | *Surfaces enlarged | ||
+ | |||
+ | *Higher [[Crown|crowns]] | ||
+ | |||
+ | *Delayed [[Root - Anatomy & Physiology|root]] development | ||
+ | |||
+ | *Complicated folding of [[Enamel|enamel]] | ||
+ | |||
+ | '''Incisors''' | ||
+ | |||
+ | *High [[Crown|crowns]] | ||
+ | |||
+ | *Folded [[Enamel|enamel]] surfaces | ||
+ | |||
+ | *[[Root - Anatomy & Physiology|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 | ||
− | |||
− | |||
[[Category:Teeth - Anatomy & Physiology]] | [[Category:Teeth - Anatomy & Physiology]] | ||
[[Category:Horse - Alimentary System]] | [[Category:Horse - Alimentary System]] | ||
− |
Revision as of 14:30, 3 September 2010
The Horse
Dental Formula
2 (I3/3 C0/0 P3/3) Deciduous
2 (I3/3 C1/1 P3-4/3 M3/3) Permanent
Canines
- Rudimentary
- In diastema
Molars
- Surfaces enlarged
- Higher crowns
- Delayed root development
- 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