pone.0215401.g010.tif (3.34 MB)

Permanent maxillary canines of juvenile Baltic grey seals (Halichoerus grypus grypus).

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posted on 12.04.2019 by Uwe Kierdorf, Morten T. Olsen, Patricia Kahle, Catharina Ludolphy, Horst Kierdorf

(a) Left maxillary C of specimen ZMUC CN 1157 (top) and right maxillary C of specimen ZMUC 693 (bottom). Root development is more advanced in the canine of ZMUC CN 1157. Arrows: crown-root border; arrowhead: opening into the pulp cavity at the crown tip of the right maxillary C of ZMUC 693. Insert: apical foramina of the canines of ZMUC CN 1157 (left) and ZMUC 693 (right). (b) SEM-BSE image of polished cut surface of the longitudinally sectioned left maxillary C of specimen ZMUC 693, showing external root resorption affecting cementum (Ce) and dentin (D). Asterisk: cementum-dentin-junction. (c) SEM-BSE image showing interglobular dentin (areas where the calcospherites have failed to fuse; these areas appear black in the image) in the root of the left maxillary C of specimen ZMUC 693. Ce: cementum; D: dentin; asterisk: cementum-dentin-junction.