This photograph and intraoral radiograph are from an 18 month old mixed breed dog that initially presented for persistent deciduous teeth.

Describe the abnormal intraoral radiographic findings.

• Answer:

  Increased periodontal ligament space adjacent to the mesial aspect of the left mandibular second molar (310). It also has a single root rather than the usual two and the cusp is misshapen. The left mandibular third molar (311) is missing.

The right mandibular first molar (410) had a similar widening of the periodontal ligament space confluent with vertical and horizontal bone loss mesially. It too has just one root and an altered cusp. Tooth 411 (right mandibular third molar) was missing

What is the the diagnosis and recommended treatment?

• Answer:

  Teeth 310 and 410 have periodontal disease and extraction was the treatment of choice