Results 81 to 90 of about 66,194 (310)
Dental crown morphological variation and heterodonty in carcharhiniform sharks
The Anatomical Record, EarlyView.Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Flávia Zanini, Karla D. A. Soares
wiley +1 more source
Эндодонтия Today, 2020 Resection of the root apex of tooth remains actual in treatment of chronic apical periodontitis in practice of dentists. To prevent possible complications of this operation osteoplastic materials are used.
doaj
Irreversible and reversible modes of operation of deterministic ratchets [PDF]
, 2000 We discuss a problem of optimization of the energetic efficiency of a simple rocked ratchet. We concentrate on a low-temperature case in which the particle's motion in a ratchet potential is deterministic.
Bird G. A. +11 more
core +3 more sources
The 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
Contemporary Clinical DentistryThe presence of both a pathologic external cervical resorption (ECR) and an iatrogenic over-enlarged root canal with a widened apex can significantly compromise the structural integrity of a tooth.
Gopal Chandra Sanyal +3 more
doaj +1 more source
Restorative Dentistry & Endodontics, 2016 Objectives The purpose of this study was to evaluate the proximity of the mandibular molar apex to the buccal bone surface in order to provide anatomic information for apical surgery. Materials and Methods Cone-beam computed tomography (CBCT) images
Dokyung Kim, Jung-Hong Ha +3 more
doaj +1 more source
Management of Maxillary Anterior Tooth with Open Apex by MTA Apexification
International Journal of Innovative Science and Research Technology (IJISRT)Endodontic therapy of teeth with open apex and chronic periapical lesion presents a challenging situation to the clinician. The present case reported outlines treatment of symptomatic maxillary central incisors that have a traumatic history of 15years.
Surya K R +3 more
openaire +1 more source
First record of Labium (Hymenoptera: Ichneumonidae: Labiini) in South America with description of a new species from Brasil [PDF]
, 2003 Labium is a primitive transantarctic genus which parasitizes ground-nesting halictid bees and until now has been known only from the Australian Region.
Porter, Charles C.
core +1 more source
The 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
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The 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
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