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Fig. 2 | Zoological Letters

Fig. 2

From: Unaltered sequence of dental, skeletal, and sexual maturity in domestic dogs compared to the wolf

Fig. 2

Stages of tooth eruption (a) and proximal humeral growth plate closure (b) in the investigated wolves and domestic dogs of different absolute ages. The data suggest that dental maturity (a) is attained at 4 – 6 months in wolves and domestic dogs and skeletal maturity (b) is attained at 10 – 12 months in wolves and 10 – 11 months in domestic dogs (only non-chondrodystrophic breeds). There are no extensive differences between dogs and wolves. Eruption scores (a) were calculated as the sum of the eruption stages of all teeth (1, 2 or 3; Fig. 1) divided by the total number of examined teeth. The resulting eruption score thus lays between 1 (all permanent teeth are in stage 1) and 3 (dental maturity attained: all permanent teeth fully erupted in stage 3). Proximal humeral growth plates were scored as either open (stage 0) or closed (stage 1, Fig. 1). Raw data are provided in Additional file 1

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