Results 71 to 80 of about 49,641 (255)

Plesippus francescana (Frick) from the late Pliocene, Coso Mountains, California, with a review of the genus Plesippus [PDF]

, 1936
Two mammalian types, occurring in a late Pliocene fauna from the Coso Mountains, California, have already been described. Among the more abundant forms in this assemblage are the horses of the genus Plesippus.
Schultz, John R.
core  

Natural Aging of Biomaterials in Ambient and Physiological Environments

Advanced NanoBiomed Research, EarlyView.
Biomaterials used in biomedical applications can change their physical properties over time, even under ambient and physiological conditions. This review highlights key studies on the natural aging of materials ranging from soft hydrogels to metals and ceramics, emphasizing how time‐dependent changes influence function and performance.
Shuyu Zhang, Anne E. Staples
wiley   +1 more source

Analysis of Pediatric Pulpotomy, Pulpectomy, and Extractions in Primary Teeth Revealed No Significant Association with Subsequent Root Canal Therapy and Extractions in Permanent Teeth: A Retrospective Study

Pediatric Reports
Recent evidence suggests that an ever-growing number of pediatric patients require invasive treatments such as root canal therapy (RCT) in their permanent dentition, albeit with little information about risk factors such as prior invasive treatments of ...
Arash Farhadian, Mayce Arreem Issa, Karl Kingsley, Victoria Sullivan   +3 more
doaj   +1 more source

On a dynamic reaction-diffusion mechanism: The spatial patterning of teeth primordia in the alligator [PDF]

, 1996
It is now well established both theoretically and, more recently, experimentally, that steady-state spatial chemical concentration patterns can be formed by a number of specific reaction–diffusion systems.
Kulesa, P. M., Murray, J. D.
core   +1 more source

Finite element analysis of feeding in red and gray squirrels (Sciurus vulgaris and Sciurus carolinensis)

The Anatomical Record, EarlyView.
Abstract Invasive gray squirrels (Sciurus carolinensis) have replaced the native red squirrel (Sciurus vulgaris) across much of Great Britain over the last century. Several factors have been proposed to underlie this replacement, but here we investigated the potential for dietary competition in which gray squirrels have better feeding performance than ...
Philip G. Cox, Peter J. Watson
wiley   +1 more source

Dental arch widths in the early and late permanent dentitions of a Nigerian population

Nigerian Dental Journal, 2009
Objective: This study was carried out in a Nigerian population to assess arch widths at two different stages of dentition, to observe the comparative changes which may occur, and to determine the presence or absence of sexual dimorphism in arch ...
I. A. Aluko, O. O. daCosta, M. C. Isiekwe   +2 more
doaj   +1 more source

Influence of growth structures and fixed appliances on automated cephalometric landmark recognition with a customized convolutional neural network

BMC Oral Health, 2023
Background One of the main uses of artificial intelligence in the field of orthodontics is automated cephalometric analysis. Aim of the present study was to evaluate whether developmental stages of a dentition, fixed orthodontic appliances or other ...
Teodora Popova, Thomas Stocker, Yeganeh Khazaei, Yoana Malenova, Andrea Wichelhaus, Hisham Sabbagh   +5 more
doaj   +1 more source

Management of inflammatory dentigerous cysts in children : report of two cases [PDF]

, 2010
Inflammatory dentigerous cysts are usually associated with a carious or non-vital primary tooth. Consequently they are found in children with a mixed dentition.
Azzopardi, Alexander, Scerri, Erica
core  

The Relationships Between Fluoride Intake Levels and Fluorosis of Late‐Erupting Permanent Teeth [PDF]

, 2017
Objectives To examine the relationships between fluoride intake levels and fluorosis of late‐erupting permanent teeth. Methods The current study used information collected from 437 children in the longitudinal Iowa Fluoride Study.
Aasenden, Baelum, Beltran-Aguilar, Bhagavatula, Burt, Cruz-Orcutt, Dean, Dean, DenBesten, Haavikko, Hong, Hong, Ishii, Kroon, Kumar, Larsen, Larsen, Levy, Levy, Levy, Levy, Maguire, Manji, McClure, McClure, Nelson, Palenstein Helderman, Pendrys, Pendrys, Pendrys, Pendrys, Pendrys, Ramires, Russell, Rwenyonyi, Shillingburg, Singh, Slayton, Sudhir, Tai, Thylstrup, United States Department of Health and Human Services, Warren, Whitford   +43 more
core   +2 more sources

Tooth eruption status and bite force determine dental microwear texture gradients in albino rats (Rattus norvegicus forma domestica)

The Anatomical Record, EarlyView.
Abstract Dental microwear texture analysis (DMTA) is widely applied for inferring diet in vertebrates. Besides diet and ingesta properties, factors like wear stage and bite force may affect microwear formation, potentially leading to tooth position‐specific microwear patterns.
Daniela E. Winkler, Isabelle Bernetière, Christine Böhmer   +2 more
wiley   +1 more source