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35 results for “Dental Enamel”
Figure 5. Dasypus hybridus. A in Dental enamel structure in long-nosed armadillos (Xenarthra: Dasypus) and its evolutionary implications
Figure 5. Dasypus hybridus. A, cross-section parallel to the occlusal plane of a permanent molariform. B, C, photomicrographs of the permanent molariform, taken with the scanning electron microscope, showing the enamel layer. Abbreviations: D, dentine; E, enamel; EDJ, enamel–dentine junction; white arrowheads show incremental lines.
Figure 4. Dasypus punctatus. A in Dental enamel structure in long-nosed armadillos (Xenarthra: Dasypus) and its evolutionary implications
Figure 4. Dasypus punctatus. A, cross-section parallel to the occlusal plane of a deciduous molariform. B, C, photomicrographs of the deciduous molariform, taken with the scanning electron microscope, showing the enamel layer (E). D, cross-section parallel to the occlusal plane of a permanent molariform. E, F, photomicrographs of the permanent molariform, taken with the scanning electron microscope, showing detail of the enamel layer. Abbreviations: D, dentine; E, enamel; EDJ, enamel– dentine junction; white arrowheads show incremental lines.
Figure 2. Dasypus novemcinctus. A, B in Dental enamel structure in long-nosed armadillos (Xenarthra: Dasypus) and its evolutionary implications
Figure 2. Dasypus novemcinctus. A, B, general view of a deciduous molariform (A) and a permanent molariform (B), showing detail of a section parallel to the occlusal plane. The dotted line indicates the extent of the vestigial enamel (VE) in A, and the enamel (E) in B. C, D, photomicrographs of the deciduous molariform, taken with the scanning electron microscope, showing the VE without a crystalline structure. E, enamel layer on a permanent tooth. F, G, details of the indicated areas in E. Abbreviations: D, dentine; E, enamel; EDJ, enamel–dentine junction; IPM, interprismatic matrix; P, prisms; VE, vestigial enamel; white arrowheads show incremental lines.
Effects of Allium Sativum and Moringa Oleifera Extract on Dental Enamel
ClinicalTrials.gov study NCT05744752. IPD Sharing: NO. Countries: 1. Publications: 3.
Data from: Enamel hypoplasia and dental wear of North American late Pleistocene horses and bison: an assessment of nutritionally-based extinction models
Open the record for dataset details and reuse information.
FIGURE 9 in Paleoecology of the Rhinocerotidae (Mammalia, Perissodactyla) from Béon 1, Montréal-du-Gers (late early Miocene, SW France): Insights from dental microwear texture analysis, mesowear, and enamel hypoplasia
FIGURE 9. Prevalence of hypoplasia (all types) by species and tooth locus. A- Number of hypoplastic teeth (dark colors) compared to the number of healthy teeth (light colors). B- Frequency of hypoplastic teeth (dark colors) and healthy teeth (light colors). White stands for non-documented loci.
FIGURE 4 in Paleoecology of the Rhinocerotidae (Mammalia, Perissodactyla) from Béon 1, Montréal-du-Gers (late early Miocene, SW France): Insights from dental microwear texture analysis, mesowear, and enamel hypoplasia
FIGURE 4. The three different types of hypoplasia considered in this study and the associated measurements. A- Lingual view of right M2 of the specimen MHNT.PAL.2004.0.58 (H. beonense) displaying three types of hypoplasia. B- Interpretative drawing of the photo in A illustrating the hypoplastic defects: a- pitted hypoplasia, b- linear enamel hypoplasia, and c- aplasia. C- Interpretative drawing of the photo in A illustrating the measurements: 1- distance between the base of the defect and the enamel-dentin junction, 2- width of the defect (when applicable).
FIGURE 3 in Paleoecology of the Rhinocerotidae (Mammalia, Perissodactyla) from Béon 1, Montréal-du-Gers (late early Miocene, SW France): Insights from dental microwear texture analysis, mesowear, and enamel hypoplasia
FIGURE 3. Principle of mesowear scoring with the main variables illustrated (occlusal relief and cusp shape) and examples on rhinocerotid teeth. A- Typically two parameters are studied in mesowear: cusp shape and occlusal relief. Cusp shape can be sharp, round or blunt, while occlusal relief is whether high or low. Illustration on the upper right M1 of the specimen MHNT.PAL.2004.0.58 (H. beonense). Examples of mesowear scores using the three methods tested in this study (ScoreA, ScoreB, Ruler) are provided on the paracone of the following specimens: B- Right D4 of MHNT.PAL.2015.0.1204 (G2 685; Pl. mirallesi), C- Left M1 and M2 MHNT.PAL.2015.0.277 (Pr. douvillei), D- Left D4 of MHNT.PAL.2015.0.1204 (Béon F2 193; Pl. mirallesi), E- Left D3 and D4 of MHNT.PAL.2015.0.2796 (Pr. douvillei). ScoreA: mesowear score based on Winkler and Kaiser (2011); B- ScoreB: mesowear score adapted from Fortelius and Solounias (2000); C- Ruler: mesowear score based on Mihlbachler et al. (2011).
FIGURE 6 in Paleoecology of the Rhinocerotidae (Mammalia, Perissodactyla) from Béon 1, Montréal-du-Gers (late early Miocene, SW France): Insights from dental microwear texture analysis, mesowear, and enamel hypoplasia
FIGURE 6. Comparison of hand- and sand-prepared DMTA surfaces (200x200 µm) by species. Topography and black and white photosimulation of the following specimens: B. brachypus – hand-prepared MHNT.PAL.2015.0.1262 right m3 (protoconid, shearing facet) and sand-prepared MHNT.PAL.2015.0.2830 left m2 (hypoconid, shearing facet); Pr. douvillei – hand prepared MHNT.PAL.2015.0.1228 left m3 (protoconid, grinding facet) and sand-prepared MHNT.PAL.2015.0.2758 left m2 ptc (protoconid, grinding facet); Pl. mirallesi – hand-prepared MHNT.PAL.2015.0.1196 left m2 ptc (protoconid, shearing facet) and sand-prepared MHNT.PAL.2015.0.2794 (2002 E2 30) left m1 (hypoconid, shearing facet); H. beonense – hand-prepared MHNT.PAL.2015.0.1140 left m1 (hypoconid, grinding facet) and sand-prepared MHNT.PAL.2015.0. 1136.1 right M3 (protocone, grinding facet).
FIGURE 2 in Paleoecology of the Rhinocerotidae (Mammalia, Perissodactyla) from Béon 1, Montréal-du-Gers (late early Miocene, SW France): Insights from dental microwear texture analysis, mesowear, and enamel hypoplasia
FIGURE 2. Localization of the microwear facets on rhinocerotid molars. Position of the two microwear facets (grinding and shearing) on the second upper molar (left) and second lower molar (right). Both facets are sampled on the same enamel band with (grinding) or without (shearing) Hunter-Schreger bands (HSB). Modified after Hullot et al. (2019).
Colorimetric, Ultra-structural and Elemental Comparison of Dental Enamel Defects
ClinicalTrials.gov study NCT04704089. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Evaluation of the Optimum Brushing Force on Dental Plaque Removal and the Abrasive Effect of Brushing Force on Enamel Surface.
ClinicalTrials.gov study NCT04675736. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Figure 6 in Dental enamel structure in long-nosed armadillos (Xenarthra: Dasypus) and its evolutionary implications
Figure 6. Parsimonious reconstruction of ancestral enamel character states in cingulates. Character 1 is a binary character 'presence of enamel in permanent teeth' [present (0); or absent (1)], and character 2 is the multistate character 'enamel complexity in permanent teeth' [complex multilayered prismatic enamel (0); reduced, thin layer of prismatic enamel (1); or prismless enamel (2)]. Shaded circles, not applicable.
Figure 3. Dasypus sabanicola. A in Dental enamel structure in long-nosed armadillos (Xenarthra: Dasypus) and its evolutionary implications
Figure 3. Dasypus sabanicola. A, cross-section parallel to the occlusal plane of a deciduous molariform. B, C, photomicrographs of the deciduous molariform, taken with the scanning electron microscope, showing the vestigial enamel (VE) without crystalline structure. D, cross-section parallel to the occlusal plane of a permanent molariform. E, F, photomicrographs of the permanent molariform, taken with the scanning electron microscope, showing detail of the enamel layer. Abbreviations: D, dentine; E, enamel; EDJ, enamel–dentine junction; VE, vestigial enamel; white arrowheads show incremental lines.
Figure 1 in Dental enamel structure in long-nosed armadillos (Xenarthra: Dasypus) and its evolutionary implications
Figure 1. Skulls of Dasypus species studied (in lateral view). A, Dasypus novemcinctus. B, Dasypus sabanicola. C, Dasypus hybridus. D, E, Dasypus punctatus (MN 552-V); a detail of the analysed teeth is shown in E. Abbreviations: dm, deciduous molariform; pm, permanent molariform. Scale bar (not for E): 10 mm.
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Allen Brain Atlas
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