Results 91 to 100 of about 30,332 (300)

Trophic evolution in ornithopod dinosaurs revealed by dental wear

open access: yesNature Communications
Ornithopod dinosaurs evolved numerous craniodental innovations related to herbivory. Nonetheless, the relationship between occlusion, tooth wear rate, and tooth replacement rate has been neglected. Here, we reconstruct tooth wear rates by measuring tooth
Attila Ősi   +9 more
doaj   +1 more source

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

open access: yesThe Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro   +1 more
wiley   +1 more source

Patterns, causes and consequences of tooth wear in cervids

open access: yes, 2007
Foraging ecology and environmental conditions have represented important driving forces in the evolution of both dental morphology as well as the digestive system.
Veiberg, Vebjørn
core   +1 more source

Rethinking brachycephaly: Anatomical implications and health considerations in lagomorphs

open access: yesThe Anatomical Record, EarlyView.
Abstract Brachycephaly in domestic rabbits is increasingly perceived by welfare organizations as associated with significant health complications, particularly oral pathologies. Despite this perception, comparative anatomical research into rabbit brachycephaly is limited compared to that of dogs and cats, compelling an in‐depth examination of its ...
Helaina Cressy   +3 more
wiley   +1 more source

Multidisciplinary management of advanced complexity tooth wear cases: patient needs beyond the direct and indirect restorations dichotomy

open access: yes, 2023
There is increased evidence supporting the different management modalities of tooth wear, be it direct or indirect resin composite through an additive approach, or ceramics through a subtractive one.
Calvert, Gareth   +2 more
core   +1 more source

Comparative cranial biomechanics reveal macroevolutionary trends in theropod dinosaurs, with emphasis on Tyrannosauroidea

open access: yesThe Anatomical Record, EarlyView.
Abstract Tyrannosaurus is viewed as a model organism in vertebrate paleontology, with numerous studies analyzing its feeding biomechanics. Nonetheless, the evolution of this feeding performance has been under‐addressed in Tyrannosauroidea, especially in basal tyrannosauroids. Here we used muscle‐force reconstruction and finite element analysis (FEA) to
Evan Johnson‐Ransom   +4 more
wiley   +1 more source

Inter‐ and intraspecific variation in theropod dinosaur dental microwear and its palaeoecological implications

open access: yesThe Anatomical Record, EarlyView.
Abstract Differences in skull and tooth morphology, stomach contents, and estimated bite force between medium‐to‐large sized (≥100 kg) predatory theropod dinosaurs have long been suspected to correlate with differences in their diets and dietary guilds (e.g., hypercarnivory, piscivory).
Cassius Morrison   +9 more
wiley   +1 more source

Study on Tooth Wear of Spur Gears Under the Mixed Elastohydrodynamic Lubrication

open access: yesJixie chuandong, 2022
To study the wear evolution process and wear law of involute spur gears under the mixed elastohydrodynamic lubrication (EHL) and consider the lubrication conditions, thermal effects and load changes in the wear process of gear pairs, a wear model of gear
Wang Han   +3 more
doaj  

Severe tooth wear in Prader-Willi syndrome. A case–control study

open access: yesBMC Oral Health, 2012
Background Prader-Willi syndrome (PWS) is a rare complex multsystemic genetic disorder characterized by severe neonatal hypotonia, endocrine disturbances, hyperphagia and obesity, mild mental retardation, learning disabilities, facial dysmorphology and ...
Saeves Ronnaug   +4 more
doaj   +1 more source

A Novel Tooth Wear Index based-on in-vivo 3D Scanning Analysis

open access: yes, 2015
Objective: to develop a tooth wear index capable of objectively classifying and quantifying the progression of tooth wear using accurate 3D scanning data of tooth wear in patients. Materials and methods: a 3D tooth wear scanning protocol, aimed at in-
Whitters, John   +3 more
core  

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