Photographs of a dog crania and mandible collected during the Robert E. Peary expedition in Northwest Greenland in 1897 (specimen #14049, AMNH).

<p>A. Healed depression fracture in the left frontal just posterior to the orbit. B. Antemortem loss of the right 4^th premolar and antemortem fracture of the left 4^th premolar. C. Right mandible with 4^th premolar, first molar (carnassial), and 3^rd molar lost antemortem. The antemortem tooth loss and fracture observed in this specimen is consistent with intentional tooth removal to inhibit gnawing.</p

Antemortem tooth loss in dogs and wolves by number and percentage of specific tooth group affected: a. wolves, b. dogs.

<p>Antemortem tooth loss in dogs and wolves by number and percentage of specific tooth group affected: a. wolves, b. dogs.</p

Antemortem tooth fracture in dogs and wolves by number and percentage of specific tooth group affected: a. wolves, b. dogs.

<p>Antemortem tooth fracture in dogs and wolves by number and percentage of specific tooth group affected: a. wolves, b. dogs.</p

Antemortem tooth fracture in dogs and wolves by number and percentage of individuals affected: a. wolves, b. dogs.

<p>Antemortem tooth fracture in dogs and wolves by number and percentage of individuals affected: a. wolves, b. dogs.</p

Profile of the specimens analyzed in this study: a. wolves, b. dogs.

<p>Profile of the specimens analyzed in this study: a. wolves, b. dogs.</p

Traumatic lesions in dogs and wolves by position: a. wolves, b. dogs.

<p>Traumatic lesions in dogs and wolves by position: a. wolves, b. dogs.</p

Traumatic lesions in dogs and wolves by number and percentage of individuals affected, and by type of lesion: a. wolves, b. dogs.

<p>Traumatic lesions in dogs and wolves by number and percentage of individuals affected, and by type of lesion: a. wolves, b. dogs.</p

Location of the dog and wolf samples described in this study.

<p>Wolves: 1. Alberta, 2. Nunavut, 3. Russian Arctic, 4. Russian Subarctic. Dogs: A. Ellesmere, B. Greenland, C. Chukotka, D. Kamchatka, E. Bering Island, F. Northern Far East, G. Sakhalin, H. Sakha, I. Trans-Baikal.</p

Hypoplastic lesions in dogs and wolves by number of individuals affected: a. wolves, b. dogs.

<p>Hypoplastic lesions in dogs and wolves by number of individuals affected: a. wolves, b. dogs.</p

Hypoplastic lesions in dogs and wolves by specific tooth group affected: a. wolves, b. dogs.

<p>Hypoplastic lesions in dogs and wolves by specific tooth group affected: a. wolves, b. dogs.</p