14/10/2026
This gorgeous 3 year old Welsh Section A came to us with a persistent discharging abscess on the left side of her face. Despite antibiotic treatment, the discharge wasn’t resolving so the referring vet sensibly considered a tooth root infection of a partially erupted upper cheek tooth as the most likely differential. Xrays confirmed this was the diagnosis. Examination of the extracted tooth revealed the cause of the infection was a patent infundibulum- an abnormal opening that allowed infection to reach the root. This is an uncommon cause of tooth root infection. The infection spreads to the surrounding area and in this case pus was found within the pulp cavities of the teeth confirming that extraction was our only option. This is a developmental condition so could not be prevented. It differs from infundibular caries which involves erosion of the cavity from years of decay and affects many more horses.