Fig. 31.6.

Yellow-footed rock wallaby (Petrogale xanthopus) with macropod progressive periodontal disease, oblique skull radiographs to isolate left mandible. (a) 4 wk after initial presentation and extraction of left 1st–3rd mandibular molars. A retained tooth root is evident, with associated osteomyelitis and mandibular fracture (arrow). The right mandibular 1st molar displays fracture of the caudal root with associated atrophy, possibly consequent to molar drift and progression (the tooth was extracted) (arrowhead). (b) 6 wk after initial presentation. Sequestrum evident in ventral mandible (arrow). There is atrophy of the right maxillary 1st molar tooth roots, though the tooth remained stable (arrowhead). (c) 8.5 wk after initial presentation, confirming extraction of sequestrum (arrow). The lesion subsequently healed well. Percutaneous injection of 40% poloxamer gel with 1% doxycycline to the site of mandibular osteomyelitis was performed on three occasions over the course of treatment.