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1,210
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Dataset results
1,210 results for “teeth”
Outcomes of Partial Pulpotomy Treatment in Cariously Exposed Teeth
ClinicalTrials.gov study NCT06802549. IPD Sharing: YES. Countries: 1. Publications: 3.
Mechanized Instrumentation for Endodontic Treatment of Primary Teeth
ClinicalTrials.gov study NCT03453658. IPD Sharing: UNDECIDED. Countries: 1. Publications: 19.
European Study on Three Different Approaches to Managing Class 2 Cavities in Primary Teeth
ClinicalTrials.gov study NCT01797458. IPD Sharing: NO. Countries: 3. Publications: 3.
Effectiveness of Bioactive Resin Varnish and Fluoride Containing Xylitol Varnish in Management of Teeth Hypersensitivity
ClinicalTrials.gov study NCT04568473. IPD Sharing: NO. Countries: 1. Publications: 1.
Pain Management in Teeth With Reversible Pulpitis
ClinicalTrials.gov study NCT07114198. IPD Sharing: NO. Countries: 1. Publications: 4.
Treatment of Interproximal Cavities on Primary Molar Teeth With Silver Diamine Fluoride
ClinicalTrials.gov study NCT03770286. IPD Sharing: NO. Countries: 1. Publications: 5.
Pulp Transplantation in Necrotic Mature Teeth With Periapical Radiolucency
ClinicalTrials.gov study NCT07258888. IPD Sharing: YES. Countries: 1. Publications: 3.
A subantarctic reigitheriid and the evolution of crushing teeth in these enigmatic Mesozoic mammals
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Taxonomic utility of isolated ankylosaurian dinosaur teeth using traditional and geometric morphometrics with implications for ankylosaur palaeoecology
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Data for: A new ‘acanthothoracid’ placoderm from the Arctic Canada (Early Devonian) and its bearing on the evolution of jaws and teeth
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Sexual dimorphism of head, teeth, flipper, and body size in northern elephant seals (<em>Mirounga angustirostris</em>) throughout ontogeny
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Loricarioid catfish evolved skin denticles that recapitulate teeth at the structural, developmental, and genetic levels (raw RNAseq reads)
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Data from: Oxygen isotope composition of teeth suggests endothermy and possible migration in some Late Cretaceous shark taxa from the Gulf Coastal Plain, USA
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Data from: Eocene shark teeth from peninsular Antarctica: Windows to habitat use and paleoceanography
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Why the long teeth? Morphometric analysis suggests different selective pressures on functional occlusal traits in Plio-Pleistocene African suids
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Raw data for: Over-eruption in marsupial carnivore teeth: compensation for a constraint
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Data from: Learning to see the wood for the trees: machine learning, decision trees and the classification of isolated theropod teeth
Taxonomic identification of fossils based on morphometric data traditionally relies on the use of standard linear models to classify such data. Machine learning and decision trees offer powerful alternative approaches to this problem but are not widely used in palaeontology. Here, we apply these techniques to published morphometric data of isolated theropod teeth in order to explore their utility in tackling taxonomic problems. We chose two published datasets consisting of 886 teeth from 14 taxa and 3020 teeth from 17 taxa, respectively, each with five morphometric variables per tooth. We also explored the effects that missing data have on the final classification accuracy. Our results suggest that machine learning and decision trees yield superior classification results over a wide range of data permutations, with decision trees achieving accuracies of 96% in classifying test data in some cases. Missing data or attempts to generate synthetic data to overcome missing data seriously degrade all classifiers predictive accuracy. The results of our analyses also indicate that using ensemble classifiers combining different classification techniques and the examination of posterior probabilities is a useful aid in checking final class assignments. The application of such techniques to isolated theropod teeth demonstrate that simple morphometric data can be used to yield statistically robust taxonomic classifications and that lower classification accuracy is more likely to reflect preservational limitations of the data or poor application of the methods.
Data from: Geometric morphometric analyses of worn cheek teeth help identify extant and extinct gophers (Rodentia: Geomyidae)
Studies of the biostratigraphy and palaeoecology of fossil vertebrate assemblages require large samples of accurately identified specimens. Such analyses can be hampered by the inability to assign isolated and worn remains to specific taxa. Entoptychine gophers are a diverse group of burrowing rodents found in Oligo-Miocene deposits of the western United States. In both entoptychines and their extant relatives the geomyines, diagnostic characters of the occlusal surface of the teeth are modified with wear, making difficult the identification of many isolated fossil teeth. We use geometric morphometrics to test the hypothesis that tooth shape informs taxonomic affinities and expected levels of morphological variation across gopher taxa. We also incorporate data from microcomputer tomography to investigate changes in occlusal surface shape through wear within individuals. Our analyses demonstrate the usefulness of our approach in identifying extant geomyines to the genus, subgenus and species levels, and fossil entoptychines to the genus and, in some cases, the species level. Our results cast doubt on the validity of some species within Entoptychus and suggest future revisions to entoptychine taxonomy. The amounts of morphological divergence observed among fossil and extant genera are similar. Fossil species do not differ greatly from extant ones in that regard either. Further work evaluating the morphological variation within and across entoptychine species, including unworn teeth and osteological material, will allow revised analyses of the biostratigraphy and palaeoecology of important Oligo-Miocene mammalian assemblages of the western United States and help to infer the phylogenetic relationships and evolution of gophers.
Fossil Teeth
Source: Objaverse 1.0 / Sketchfab
FIGURES 33–40. Tanytarsus larvae mandibles with accessory dorsal teeth. 33 in Exploring unknown life stages of Arctic Tanytarsini (Diptera: Chironomidae) with DNA barcoding
FIGURES 33–40. Tanytarsus larvae mandibles with accessory dorsal teeth. 33: T. lugens, 34: T. bathophilus, 35: T. mancospinosus, 36: T. minutipalpus, 37: T. gracilentus, 38: T. lapponicus, 39: T. recurvatus, 40: T. heliomesonyctios.
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.