Figure 54 from: Sereno P (2012) Taxonomy, morphology, masticatory function and phylogeny of heterodontosaurid dinosaurs. ZooKeys 226: 1-225. https://doi.org/10.3897/zookeys.226.2840

Figure 54 - Tooth structure in Ouranosaurus nigeriensis from the mid-Cretaceous Elrhaz Formation of Niger. Successive horizontal computed-tomographic sections in cutaway view of a worn maxillary tooth showing internal structure (MNBH GAD28) A Maxillary tooth in distal view showing the location of horizontal cross-sections B Maxillary tooth in apical view (labial toward top of page) C Cross-section (labial toward top of page) through mid crown D Cross-section (labial toward top of page) through base of the crown E Cross-section (labial toward top of page) through proximal portion of the root. Abbreviations: cpc collapsed pulp cavity den dentine e enamel pc pulp cavity pri primary ridge rt root sri secondary ridge wf wear facet.