Results 21 to 30 of about 1,205,322 (296)

Osteohistology of hyperodapedontine rhynchosaurs from the Upper Triassic of Southern Brazil [PDF]

open access: yesActa Palaeontologica Polonica, 2015
The first osteohistological study focused exclusively on rhynchosaurs (non-archosauriform archosauromorphs), based on the hyperodapedontines Teyumbaita sulcognathus and Hyperodapedon sp., from the Upper Triassic of Southern Brazil, indicates a relatively
Fábio Hiratsuka Veiga   +2 more
doaj   +1 more source

New Comparative Data on the Long Bone Microstructure of Large Extant and Extinct Flightless Birds

open access: yesDiversity, 2022
Here, we investigate whether bone microanatomy can be used to infer the locomotion mode (cursorial vs. graviportal) of large terrestrial birds. We also reexamine, or describe for the first time, the bone histology of several large extant and extinct ...
Aurore Canoville   +2 more
doaj   +1 more source

Radiographic and Histomorphologic Evaluation of the Maxillary Bone after Crestal Mini Sinus Lift Using Absorbable Collagen—Retrospective Evaluation

open access: yesDentistry Journal, 2022
Background: After tooth extraction, the alveolar bone loses volume in height and width over time, meaning that reconstructive procedures may be necessary to perform implant placement.
Saverio Cosola   +7 more
doaj   +1 more source

Comparison of the long bone microstructure of two southern African marine birds, the Cape gannet (Morus capensis) and the African penguin (Spheniscus demersus) with respect to their aquatic adaptations [PDF]

open access: yes, 2013
The Cape gannet (Morus capensis) and the African penguin (Spheniscus demersus) have distinct aquatic adaptations for locomotion. The gannet, which is an efficient flying bird, uses both fore- and hind limbs to propel itself under water. On the other hand,
Dabee, Vidushi Prema
core   +1 more source

First record of palaeopathologies in appendicular bones of the Triassic pseudosuchians Erpetosuchidae and Aetosauria based on microstructural approaches [PDF]

open access: yesActa Palaeontologica Polonica
Pseudosuchians were the dominant group of archosaurs on continental ecosystems during the Triassic. However, studies that report palaeopathologies based on osteohistological evidence in this group are scarce. Here, two cases of palaeopathologies found in
Denis A. Ponce   +2 more
doaj   +1 more source

Ontogenetic stages of ceratopsian dinosaur Psittacosaurus in bone histology [PDF]

open access: yesActa Palaeontologica Polonica, 2019
The early ceratopsians Psittacosaurus and Protoceratops have provided important information on dinosaurian development because of abundant specimens of adults, subadults, juveniles, and even hatchlings.
Qi Zhao   +3 more
doaj   +1 more source

Sirt1 protects against intervertebral disc degeneration induced by 1,25-dihydroxyvitamin D insufficiency in mice by inhibiting the NF-κB inflammatory pathway

open access: yesJournal of Orthopaedic Translation, 2023
Background: It has been demonstrated that vitamin D deficiency is associated with an increased risk of patients developing lumbar disc herniation. However, intervertebral disc degeneration caused by active vitamin D deficiency has not been reported. Thus,
Peng Wang   +5 more
doaj   +1 more source

Histological Study on Bone-Implantation [PDF]

open access: yesThe American Journal of the Medical Sciences, 1895
n ...
openaire   +1 more source

Abnormalities in Bone Mineral Density and Bone Histology in Thalassemia [PDF]

open access: yesJournal of Bone and Mineral Research, 2003
Abstract This study demonstrated that there was extensive iron staining on trabecular surface and marked reduction in trabecular bone volume without significant alteration in bone formation and bone resorption rates as well as significant reduction in bone mineral density in 18 thalassemic patients.
Somnuek, Domrongkitchaiporn   +5 more
openaire   +2 more sources

Spatial Organization of Osteoclastic Coupling Factors and Their Receptors at Human Bone Remodeling Sites

open access: yesFrontiers in Molecular Biosciences, 2022
The strictly regulated bone remodeling process ensures that osteoblastic bone formation is coupled to osteoclastic bone resorption. This coupling is regulated by a panel of coupling factors, including clastokines promoting the recruitment, expansion, and
Xenia G. Borggaard   +10 more
doaj   +1 more source

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