02/03/2026
Why do horses get fractured teeth?
🦷 1. Excessive Occlusal Forces (Normal Wear Gone Wrong)
Uneven dental arcades
Large waves, steps, or hooks
Overgrown opposing teeth
Malocclusions
When pressure is uneven, certain parts of the tooth take excessive force during chewing. Over time, this creates micro-cracks that can eventually fracture.
🐴 2. Advanced Dental Caries (Infundibular or Peripheral)
Infundibular caries (especially in upper 06–09s)
Peripheral caries weakening the enamel and dentine
Caries hollow out and weaken the internal structure of the tooth, making it fragile and prone to collapse or slab fracture.
🦠 3. Endodontic Disease (Pulp Infection)
Chronic pulpitis
Apical infection
Tooth root abscess
When the pulp becomes infected, the tooth weakens from the inside. Structural integrity is lost, and fractures can follow.
⚡ 4. Trauma
Kicks from other horses
Striking solid objects (stable walls, feeders, trailers)
Falling
Bit trauma (less common for molars but possible)
Acute trauma can cause sudden fracture.
🌾 5. Chewing Hard Objects
Stones in feed
Very hard pellets
Acorns
Wood chewing / cribbing
Sudden extreme force on one cusp can cause a crown fracture.
🧬 6. Developmental Defects
Enamel hypoplasia
Incomplete cemental filling of infundibula
Abnormal tooth formation
These defects create weak points in the tooth from eruption.
⏳ 7. Age-Related Changes
Older horses have shorter reserve crowns
Secondary dentine production may be insufficient
Teeth become more brittle with age
Senior horses are more prone to fractures, especially sagittal slab fractures.
🪓 8. Iatrogenic Causes (Dental Procedure Related)
Over-aggressive floating
Excessive reduction of enamel
Power tool heat damage
Removing too much structural support
Improper dental work can predispose a tooth to fracture later.
🔄 9. Pre-existing Cracks (Idiopathic Slab Fractures)
Sometimes a tooth fractures without obvious cause. These are often:
Sagittal slab fractures (common in maxillary 09s)
Stress fractures from chronic cyclic loading
🧪 10. Periodontal Disease
Loss of periodontal support
Food packing
Chronic inflammation
When support structures weaken, abnormal movement increases fracture risk.
⚠️ Most Common Fracture Patterns
Sagittal slab fracture (upper 09 most common)
Infundibular collapse
Crown fracture with pulp exposure
Partial crown fracture
Complete clinical crown fracture
If you're seeing fractures regularly in practice, Bernadene, it’s often a combination of: ✔️ Uneven occlusion
✔️ Infundibular caries
✔️ Age-related weakening