Figure 4

Different stages of the development of the dental sac. Lateral30°ventral - laterodorsal radiographs (upper row) and corresponding sagittal CT-reconstructions (lower row) of the development of the dental sac in different stages. A, B: Early radiolucent dental sac for mandibular 10′s in a 9 month old alpaca. C, D: Coronal mineralization of the mandibular 10 with two enamel columns in a 9 month old llama (not visible in C). E, F: Erupting mandibular permanent 08 in a 30 month old llama, which would cause the deciduous tooth shedding down later. G, H: Wide pulp cavities and a common pulp chamber with open apical foramina in a recently erupted mandibular 08 in a young llama (age 32 months). Described findings are indicated with white arrows.