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1,210 results for “Teeth”
ds-uct-002: Root Canal Strain: X-Ray micro-CT of four teeth before and after root canal procedure.
<p><strong>Summary</strong>:<br> .X-Ray micro-computed tomography (micro-CT) of four teeth before (TomoB) and after (TomoA) simulation of root canal treatment and retreatment procedures instrumented with strain-gauge, including reconstructions, for two different resolutions (TomoB and TomoA with voxel sizes of 20.0 μm and 10.5 μm, respectively).<br> .The 3D image was generated with an X-Ray micro-CT Scanner version Xradia Versa 510 from Zeiss performed by A Pereira at the UFF micro-CT Facility.<br> .For use of these data, please remember to cite the DOI of the Zenodo repository and relevant papers.</p> <p><strong>Details</strong>:<br> .Tomo1B/Tomo2B/Tomo3B/Tomo4B (1024) - Voxel size: 20.0 μm; Sample-source: 45.0 mm; Sample-detector: 110 mm; Optical magnification: 0.4X; Filter: LE#1; Beam energy: 60 kV; Power: 5 W; Exposure time: 2.0 sec; Projections: 1600.<br> .Tomo1A/Tomo2A/Tomo3A/Tomo4A (2048) - Voxel size: 10.5 μm; Sample-source: 48.2 mm; Sample-detector: 110 mm; Optical magnification: 0.4X; Filter: LE#2; Beam energy: 60 kV; Power: 5 W; Exposure time: 7.0 sec; Projections: 1600.</p> <p><strong>Contents</strong>:<br> ._info_ds-uct-002.txt<br> .ds-uct-002_root_canal_strain_tomo1b_20um_8bits.zip<br> .ds-uct-002_root_canal_strain_tomo2b_20um_8bits.zip<br> .ds-uct-002_root_canal_strain_tomo3b_20um_8bits.zip<br> .ds-uct-002_root_canal_strain_tomo4b_20um_8bits.zip<br> .ds-uct-002_root_canal_strain_tomo1a_10um_8bits.zip<br> .ds-uct-002_root_canal_strain_tomo2a_10um_8bits.zip<br> .ds-uct-002_root_canal_strain_tomo3a_10um_8bits.zip<br> .ds-uct-002_root_canal_strain_tomo4a_10um_8bits.zip<br> .PB_PARECER_CONSUBSTANCIADO_CEP_2650528.pdf</p>
Fig. 7. Ginglymostomatidae Gill, 1862, teeth. A–D in Taxonomy and biostratigraphy of the elasmobranchs and bony fishes (Chondrichthyes and Osteichthyes) of the lower-to-middle Eocene (Ypresian to Bartonian) Claiborne Group in Alabama, USA, including an analysis of otoliths
Fig. 7. Ginglymostomatidae Gill, 1862, teeth. A–D. Ginglymostoma maroccanum Noubhani & Cappetta, 1997, MSC 34407.2, lower Tallahatta Formation. A. Labial view. B. Lingual view. C. Mesial view. D. Basal view. — E–H. Ginglymostoma sp., MSC 37548.1, basal Gosport Sand. E. Labial view. F. Lingual view. G. Mesial view. H. Basal view. — I–T. Nebrius thielensi (Winkler, 1874). I–L. MSC 35755.6, lower Tallahatta Formation. I. Labial view. J. Lingual view. K. Mesial view. L. Basal view. M–P. MSC 37266.1, basal Lisbon Formation. M. Labial view. N. Lingual view. O. Distal view. P. Basal view. Q–T. MSC 37496.1, basal Gosport Sand. Q. Labial view. R. Lingual view. S. Profile view. T. Basal view. Labial at bottom in basal views. Scale bars = 3 mm.
Photogrammetry dataset for two Bronze Age human teeth from Monte do Vale do Ouro 2 (Ferreira do Alentejo, Portugal)
<p>This photogrammetry dataset that accompanies the publication: "The embodiment of craft production in Bronze Age Portugal: Exceptional dental wear grooves in an individual from Monte do Vale do Ouro 2 (Ferreira do Alentejo, Portugal)" by John Charles Willman, António Carlos Valera, and Ana Maria Silva in the International Journal of Osteoarchaeology, 31(2):252-262. <a href="https://doi.org/10.1002/oa.2944" target="_blank" rel="noopener">https://doi.org/10.1002/oa.2944</a>. Includes photographs of a left and right mandibular lateral incisor (I<sub>2</sub>) with profound dental wear grooves on their lingual root surfaces. 3D models and texture files also included.</p> <p>Part of the “VAPP” Project (<em>Virtual Anthropology of Prehistoric Portugal, </em>Marie Skłodowska-Curie Actions Individual Fellowship, H2020-MSCA-IF-2018, No. 839822).</p>
Figures 1–4 in Fusion of Pectinal Teeth in Scorpio kruglovi Birula, 1910 (Scorpiones: Scorpionidae)
Figures 1–4: Scorpio kruglovi, female. Figures 1–2. Dorsal (1) and ventral (2) views. Figures 3–4. Right pecten (3), fused 7th and 8th teeth in the right pecten (4). Scale bar: 10 mm (1–2).
Figure 4 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 4. – †Nhanulepisosteus mexicanus. A-B: IGM 4902-5. Cross-section (respectively natural and polarized transmitted light) of a small tooth. We can show a crown of dentine (de), with an external crenulated layer of enameloid (arrow-heads). The pulp cavity (pc) is empty and its wall is regular. Scale bar = 100 μm.
Figure 2 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 2. – †Nhanulepisosteus mexicanus: External view of the sample used for the paleohistological study (IGM 4902). (see Material and Methods chapter for explanations). Scale bar = 5 mm.
Figure 1 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 1. – †Nhanulepisosteus mexicanus: External view of the fossil sample (IGM 4901) showing four caniniform teeth with their apical cap of acrodine (arrows). Two small teeth are seen between the fangs (arrowheads). Scale bar = 1 mm.
Figure 7 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 7. – Comparison of the pulp cavity of the fang teeth in four Lepisosteoidei. Cross sections are made in the mid part of the teeth. A: †Nhanulepisosteus mexicanus (specimen IGM 4902; see Brito et al., 2017). B: †Atractosteus sp.* from the Santonian of Hungary (specimen VER 2014.91.3). C: Atractosteus tropicus. D: Lepisosteus platostomus (See fig. 3C in Meunier and Brito, 2017) The pulp cavity is completely invaded by the dentigerous tissue in †N. mexicanus and in the Santonian †Atractosteus whereas the dentine plies let at least the central mid part in the two extant species. The tooth of †Atractosteus sp. has eusthenodont plicidentine whereas teeth of Atractosteus tropicus and Lepisosteus platostomus have polyplocodont plicidentine. Abbreviations: de: dentine; en: collar enamel; er: external ridges; pc: pulp cavity; rd: radial folding of the dentine; vs: vascular space; arrowheads: dentine folds. Scale bars: A, D = 250 μm; B = 500 μm; C = 150 μm * The photo of the ground section was given to us by Dr. Marton Szabó, Department of Paleontology and Geology, Hungarian Natural History Museum, Ludovika têr 2, Budapest 1083, Hungary.
Figure 6 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 6. – †Nhanulepisosteus mexicanus: Histological organization of the teeth supporting bone. A: Detail of the basal contact of a tooth (pc) and its supporting bone (bo) with vascular canals or cavities (vc). The white arrows point to osteons. B: Detail of the dentigerous plate showing lamellar bone and numerous cementing lines (black arrow-heads) that characterized an intensive remodeling of bone tissue below the tooth. We also show canalicles of Williamson (arrows). The asterisks point to secondary osteons. C-D: Detail of the secondary osteon (**) of Fig. 6B (respectively natural and polarized transmitted light). The secondary bone of the osteons is lamellar bone (black asterisks). The arrow-heads point to cementing line. We also show canalicles of Williamson (black arrows). E: Detail of the secondary osteon (*) of Fig. 6B showing canaliculi of Williamson (black arrows) and osteocytes (black arrowheads). A: IGM 4902-4; B, C, D, E: IGM 4902- 5. Scale bars: A = 200 μm; B = 100 μm; C, D = 50 μm; E = 25 μm.
Figure 5 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 5. – †Nhanulepisosteus mexicanus: A: Pharyngeal dentigerous plate. We can see cross (white and black arrow-heads) and axial (white and black arrows) sections of minute teeth. We can also see a section of a scale (sc) (bo = bony tissue). B: Axial section of a pharyngeal tooth (white arrow) and its supporting bony plate (bp). A: IGM 4902-4; B: IGM 4902-5. Scale bars: A = 200 μm; B = 100 μm.
Text-fig. 8. Ulmaceae a–e, Rosaceae f–l. a: Cedrelospermum, leaflet missing base but showing simple teeth, UAPC-ALTA S 25748. b: Ulmus with prominent teeth, asymmetric base, BBM-PAL-P000015. c: Ulmus leaf with prominent teeth, UAPC-ALTA S 59506. d: Ulmus fruit, UAPC-ALTA S 6590. e: Basal half of Ulmus leaf showing the obtuse teeth with subbasal entry of veins to the teeth, UAPC-ALTA S 59517. f: cf. Rubus, UAPC-ALTA S 67691. g. Prunus leaf, UAPC-ALTA S 25746. h: cf. Hesperomeles UAPC-ALTA S 67692. i: Photinia pagae, UAPC-ALTA S 67693. j: cf. Prunus, detail from g. k: Rosaceous leaf, UAPC-ALTA S 59501. l: Rosaceae, possibly Kerriae. BBM-PAL-P000047. Scale bars: a, f, i, k, l = 2 cm; b–e, g, h, j = 1 cm. in The Early Eocene Flora Of Horsefly, British Columbia, Canada And Its Phytogeographic Significance
Text-fig. 8. Ulmaceae a–e, Rosaceae f–l. a: Cedrelospermum, leaflet missing base but showing simple teeth, UAPC-ALTA S 25748. b: Ulmus with prominent teeth, asymmetric base, BBM-PAL-P000015. c: Ulmus leaf with prominent teeth, UAPC-ALTA S 59506. d: Ulmus fruit, UAPC-ALTA S 6590. e: Basal half of Ulmus leaf showing the obtuse teeth with subbasal entry of veins to the teeth, UAPC-ALTA S 59517. f: cf. Rubus, UAPC-ALTA S 67691. g. Prunus leaf, UAPC-ALTA S 25746. h: cf. Hesperomeles UAPC-ALTA S 67692. i: Photinia pagae, UAPC-ALTA S 67693. j: cf. Prunus, detail from g. k: Rosaceous leaf, UAPC-ALTA S 59501. l: Rosaceae, possibly Kerriae. BBM-PAL-P000047. Scale bars: a, f, i, k, l = 2 cm; b–e, g, h, j = 1 cm.
Figure 3 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 3. – †Nhanulepisosteus mexicanus: Histological organization of the fangs (natural transmitted light). A: Axial section of a tooth. The pulp cavity (pc) is totally occupied by axial trabeculae of dentine (de) alternating with pulp spaces. The tooth is fixed on a basement of reconstructed bone (bo). vc = vascular cavities. B-D: Three cross-sections of different levels of a tooth. B: The section is localized at the tooth base; it shows a ridged crown of orthodentine surrounded by a thin layer of enameloid (en). The pulp cavity is occupied by vascularized dentine. On the bottom of the fig, the bone of attachment (bo). C: The section crosses the mid part of the pulp cavity. The tooth is constituted of a crown of orthodentine (de) surrounded by a layer of enamel (en) showing external crests. The pulp cavity is totally occupied by vascularized dentine. D: The section is in the higher part of the pulp cavity. The tooth is constituted of a crown of orthodentine (de) surrounded by the crenulated enamel (en). We can see the pulp cavity which is reduced. E: Cross-section in the mid part of the tooth. Details of the dentine showing the peripheral orthodentine layer (white asterisks), with its ondontoblastic canalicles and the vascular canals fit together. Each canal is surrounded by orthodentine (black arrow-head). The enameloid layer is crenulated (white arrow-heads). A: IGM 4902-5; B: IGM 4902-3; C,E: IGM 4902-2; D: IGM 4902-1. Scale bars: A, B, C = 200 μm; D = 100 μm; E = 50 μm.
Fig. 3 in Feeding convergence among ray-finned fishes: Teeth of the herbivorous actinopterygians from the latest Permian of East European Platform, Russia
Fig. 3. Comparison of teeth of actinopterygian fish Isadia spp. from the Late Permian of Sokovka, Russia with their Recent equivalents. A, B. Isadia aristoviensis. C–E. Labeotropheus fuelleborni (C from Streelman et al. 2003; D, E from Abertson and Kocher 2006). F, G. Isadia suchonensis. H, J. Monotocheirodon kontos (from Menezes et al. 2013). I. Bryconamericus lethostigmus (from Hirschmann et al. 2017). K, L. Isadia arefievi. M–O. Eretmodus cyanosticus (M from Rüber et al. 1999; N, O from Boulenger 1915). Not to scale.
Fig. 2 in Feeding convergence among ray-finned fishes: Teeth of the herbivorous actinopterygians from the latest Permian of East European Platform, Russia
Fig. 2. The isolated teeth of actinopterygian fish Isadia from the Sokovka outcrop, Vyazniki, Russia, late Permian (Upper Vyatkian). A–D. Isadia aristoviensis Minikh, 1990, mandibulary teeth. A. ZPAL V.51/1, lingual view. B. ZPAL V.51/2, labial view. C. ZPAL V.51/3, lingual view. D. ZPAL V.51/4, labial view. E–I. Isadia aristoviensis Minikh, 1990, maxillary teeth. E. ZPAL V.51/6, lingual view. F. ZPAL V.51/7, labial view. G. ZPAL V.51/5, lingual view. H. ZPAL V.51/8, lingual view. I. ZPAL V.51/9, labial view. J. Isadia arefievi Minikh, 2015, ZPAL V.51/10, mandibular tooth,?lingual view. K, L. Isadia suchonensis Minikh, 1986, mandibular teeth. K. ZPAL V.51/11, lingual (K1) and lateral (K2) views. L. ZPAL V.51/12, labial view. M. Isadia suchonensis Minikh, 1986, ZPAL V.51/13, maxillary teeth,?labial view. Scale bars 1 mm (A–I), 0.5 mm (J, K, M), 0.2 mm (L).
Fig. 1 in Feeding convergence among ray-finned fishes: Teeth of the herbivorous actinopterygians from the latest Permian of East European Platform, Russia
Fig. 1. Location of the fish-bearing site and details of the exposed section. A. Map of the Eastern Europe with position of Vyazniki (BY, Belarus, LV, Latvia; EST, Estonia; LT, Lithuania). B. The area around the town of Vyazniki with position of Sokovka site (star). C. Photograph of the Sokovka section from 2013 and exposure of the fish-bearing deposits. D. The simplified section from Sokovka site showing the fish-bearing layers. Modified from Newell et al. 2010, Owocki et al. 2012, and Bajdek et al. 2017.
Fig. 5. Chelicera teeth arrangement. A in Taxonomic revision of the Neotropical spiders of the genus Idiops Perty, 1833 (Araneae, Idiopidae), with description of four new species
Fig. 5. Chelicera teeth arrangement. A. Smaller retrolateral teeth arranged in rows (I. camelus (Mello-Leitão, 1937)). B. Smaller retrolateral teeth arranged randomly (I. germaini Simon, 1892). C. Smaller retrolateral teeth absent (I. harti (Pocock, 1893)). Scale bars = 1 mm.
Fig. 3 in First Deep-Sea Shark Fossil Teeth From The Miocene Of South Korea
Fig. 3. Tooth of Dalatias cf. D. licha, CNUNHM-F392: A — photograph of the specimen; B — enlarged photograph of the labial surface of the tooth. Left scale bar, for A, equals 10 mm. Right scale bar, for B, equals 5 mm.
Fig. 2 in First Deep-Sea Shark Fossil Teeth From The Miocene Of South Korea
Fig. 2. Tooth of Dalatias licha, CNUNHM-F279: A — photograph of the specimen; B — enlarged photograph of the labial surface of the tooth. Left scale bar, for A, equals 10 mm. Right scale bar, for B, equals 5 mm.
Fig. 1 in First Deep-Sea Shark Fossil Teeth From The Miocene Of South Korea
Fig. 1. Tooth of Mitsukurina cf. M. lineata, CNUNHM-F268: A — photograph of the specimen; B — enlarged photograph of the labial surface of the tooth; C — enlarged photograph of the lingual part of the tooth. Left scale bar, for A, equals 20 mm. Right scale bar, for B and C, equals 10 mm.
Topographically distinct adaptive landscapes for teeth, skeletons, and size explain the adaptive radiation of Carnivora (Mammalia)
<p>Models of adaptive radiation were originally developed to explain the early, rapid appearance of distinct modes of life within diversifying clades. Phylogenetic tests of this hypothesis have yielded limited support for temporally declining rates of phenotypic evolution across diverse clades, but the concept of an adaptive landscape that links form to fitness, while also crucial to these models, has received more limited attention. Using methods that assess the temporal accumulation of morphological variation and estimate the topography of the underlying adaptive landscape, I found evidence of an early partitioning of craniodental morphological variation in Carnivora (Mammalia) that occurs on an adaptive landscape with multiple peaks, consistent with classic ideas about adaptive radiation. Although strong support for this mode of adaptive radiation is present in traits related to diet, its signal is not present in body mass data or for traits related to locomotor behavior and substrate use. These findings suggest that adaptive radiations may occur along some axes of ecomorphological variation without leaving a signal in others and that their dynamics are more complex than simple univariate tests might suggest.</p>
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