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22 results for “dental measurements”
Dental measurement and diet data for mammals
<p>Because teeth are the most easily preserved part of the vertebrate skeleton and are particularly morphologically variable in mammals, studies of fossil mammals rely heavily on dental morphology. Dental morphology is used both for systematics and phylogeny as well as for inferences about paleoecology, diet in particular. We analyze the influence of evolutionary history on our ability to reconstruct diet from dental morphology in the mammalian order Carnivora, and we find that much of our understanding of diet in carnivorans is dependent on the phylogenetic constraints on diet in this clade. Substantial error in estimating diet from dental morphology is present regardless of the morphological data used to make the inference, although more extensive morphological datasets are more accurate in predicting diet than more limited character sets. Unfortunately, including phylogeny in making dietary inferences actually decreases the accuracy of these predictions, showing that dietary predictions from morphology are substantially dependent on the evolutionary constraints on carnivore diet and tooth shape. The "evolutionary ratchet" that drives lineages of carnivorans to evolve greater degrees of hypercarnivory through time actually plays a role in allowing dietary inference from tooth shape, but consequently requires caution in interpreting dietary inference from the teeth fossil carnivores. These difficulties are another reminder of the differences in evolutionary tempo and mode between morphology and ecology.</p>
Figure 2. Dental measurements taken from the left M and the right M1 in A New Species of Extinct False Vampire Bat (Megadermatidae: Macroderma) from the Kimberley Region of Western Australia
Figure 2. Dental measurements taken from the left M and the right M1, based on Hand (1985).
The Mammal Dental Metrics Database: a compilation of fossil and extant mammal tooth measurements
<p class="MsoNormal"><span>Fossil relative abundance data in combination with specimen-level measurements can reveal community-level changes underpinning long-term ecological and evolutionary dynamics. However relative abundance data is not consistently reported in the paleontological literature, and measurement data is presented in individual studies in varying formats. Here, we compiled dental measurements (tooth crown length, width, and height) from the paleontological literature (or otherwise available sources) in a single database, simultaneously permitting analyses of size and relative abundance for the fossil record. This first version of the database focuses on large mammals and on the African and Arabian Neogene fossil record. Measurements of teeth of extant species were also collected. Each row gives the available measurements for a single tooth. Specimens with multiple teeth reported are divided among several rows. Taxonomic information was entered largely as given in the original source, without standardization or revision of taxonomic identifications. Geographic, stratigraphic, and assemblage information was also collected for fossil specimens, and specimens were assigned to individual 'computational localities' (normally combinations of geological unit and location) that can be treated as paleo-communities (metacommunities). Numeric ages and geographic and geological information for these localities are given in a corresponding spreadsheet. Sources are given for all measurement and age data. This dataset provides a powerful new resource for investigations of changes in relative abundance, body mass, or mass-abundance distributions in the fossil record.</span></p>
Phylogenetic analytical data, measurement analytical code to help identify dental fossils of Oligocene hyracoids from eastern Africa
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The Mammal Dental Metrics Database: a compilation of fossil and extant mammal tooth measurements
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Dental measures of extant lizards and fossil reptiles
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Dental measurement and diet data for mammals
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Dental Practitioners KAP Regarding Caries Preventive Measures in Cairo and Riyadah
ClinicalTrials.gov study NCT05792800. IPD Sharing: Not stated. Countries: 1. Publications: 6.
Changes in Upper Airway Anatomy, Quality of Life Measures, and Polysomnographic Parameters Using A Functional Dental Appliance
ClinicalTrials.gov study NCT02805764. IPD Sharing: NO. Countries: 1. Publications: 8.
Evaluation of the Accuracy of Measurements Made on Images Taken From the Mouth for Dental Arches
ClinicalTrials.gov study NCT03648515. IPD Sharing: NO. Countries: 1. Publications: 7.
QI Study of a Practice Facilitator's Impact in Working With Clinics on Improving Dental, Lead & Obesity Measures for Children
ClinicalTrials.gov study NCT01739166. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Measurement of Dental Health Care Utilization
ClinicalTrials.gov study NCT07161362. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Comparison of Color Measurements of Postgraduate Dental Students Using Different Color Determination Methods
ClinicalTrials.gov study NCT06791694. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Method for Measuring Dental Mobility and Displacement Force
ClinicalTrials.gov study NCT06600867. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Clinical Investigation Measuring the Long Term Clinical Performance and Safety of Biodentine™ XP in Patients Treated for Coronal Restorative or Endodontic Dental Indications.
ClinicalTrials.gov study NCT06955429. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Investigation of the Effect of Scan Delay on the Measurement of Dental Prescale II
ClinicalTrials.gov study NCT04839458. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Measuring and Evaluating the Changes in Anxiety Levels of Children With Repetitive Sessions of Dental Treatments
ClinicalTrials.gov study NCT04967300. IPD Sharing: NO. Countries: 1. Publications: 0.
Measurement of the Performance and Safety of RTR+Membrane in Guided Tissue Regeneration (GTR) in Dental Surgical Procedures
ClinicalTrials.gov study NCT06467630. IPD Sharing: NO. Countries: 1. Publications: 0.
Dental PROBE (Dental Practice suRvey of Office Blood Pressure mEasurement)
ClinicalTrials.gov study NCT01604200. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Effect of Therapeutic Measures in Dental Caries Reduction in Children With Primary Dentition From Medellín City
ClinicalTrials.gov study NCT00475618. IPD Sharing: Not stated. Countries: 0. Publications: 0.
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