Fig. 6

Three-dimensional reconstructions of observed pulp configurations at the level of the deciduous mandibular cheek teeth. Different colors have been used to indicate separate pulp compartments. Pulp horns and root canals are labeled as in Fig. 5. Reference planes (A to C) indicate the position of selected 2D-images. The deciduous Triadan 07 shows two configurations. In younger teeth, a wide communication exists between adjacent pulp horns and root canals as demonstrated in a 6 months old tooth (CPC, common pulp chamber, 807). With increasing age, secondary dentin is laid down causing narrowing or in this particular case, disappearance of the CPC in a 2 years and 4 months old alpaca. A deciduous Triadan 08 shows 5 pulp horns and a CPC in a young tooth of 6 months (808). In older teeth (708, 2 years) 6 pulp horns can be perceived. Columnar segmentation (CS) occurs with pulp horn 1, 4, 2 and 5, and root canal I remaining connected. The second pulp compartment in these teeth consists of pulp horn 3, 6 and root canal II