Fig. 5

(See legend on next page). (See figure on previous page). Three-dimensional reconstructions of common pulp configurations in permanent mandibular cheek teeth in alpacas. Different colors have been used to indicate separate pulp compartments. Pulp horns and root canals are labeled with Arabic numerals ranging from 1 to 5 and Roman numerals ranging from I to IIc, respectively. Reference planes (A to C) indicate the position of selected 2D-images. Permanent Triadan 09s and 10s showed 2 different configurations being a CPC illustrated in a 1 years and 4 months old tooth, and column segmentation (CS) as illustrated in a 6 years and 7 months old tooth, creating two separate pulp compartments. In these teeth, root canal I is connected to pulp horns 1 and 3, whereas root canal II is connected to pulp horn 2 and 4. In permanent Triadan 11s, that have an additional pulp horn 5, 3 pulp configurations were recorded. A CPC is demonstrated in a tooth 1 year and 1 month post-eruption. Note that pulp horn 5 exceptionally splits in 2 more occlusally. CS is illustrated in a 13 years and 10 months old tooth. Root canals Ia (lingual) and Ib (buccal) are connected to pulp horns 1 and 3. Communication exists apically between root canals IIa, IIb, IIc and pulp horn 2,4 and 5. A third configuration was characterized by 3 separate pulp compartments in a 7 years and 10 months old tooth, creating maximal columnar segmentation (MCS). Note the splitting, followed by apical fusion at the level of root canal I which was specific to this tooth