Results 81 to 90 of about 679,251 (294)

Evaluation of the Effectiveness of Four Composite Polishing Systems: An In Vitro Study [PDF]

open access: yesInternational Journal of Prosthodontics and Restorative Dentistry
Purpose: To evaluate the surface roughness of six composites polished with four different polishing systems. Materials and methods: Cylindrical resin specimens were prepared for each different composite group of nanohybrid (Clearfil Majestic Esthetic®, G-
Ramin Atash   +5 more
doaj   +1 more source

Effects of Laser Pulse Duration on Pulse Laser Micro Polishing [PDF]

open access: yes, 2012
Pulsed laser micro polishing (PL?P) has been shown to be an effective method of polishing micro metallic parts whose surface roughness can approach the feature size.
Li, Xiaochun   +4 more
core  

Postcranial anatomy and osteohistology of an early prozostrodont cynodont from the Upper Triassic of Brazil

open access: yesThe Anatomical Record, EarlyView.
Abstract Prozostrodon brasiliensis, a probainognathian cynodont of the clade Prozostrodontia, is recognized as a key taxon for understanding the origin of Mammaliaformes and mammals. Despite detailed investigations of its cranial anatomy, the postcranial skeleton has received comparatively less attention.
Iasmim M. Michelotti   +4 more
wiley   +1 more source

Integrated microanatomy and microstructure of the maxillary tooth plate reveal a reinforced feeding system and tougher diet in Late Triassic Hyperodapedontinae (Rhynchosauria, Archosauromorpha)

open access: yesThe Anatomical Record, EarlyView.
Abstract Hyperodapedontine rhynchosaurs possessed a unique oral apparatus, long interpreted as an adaptation for processing abrasive and resistant plant material. However, the microanatomical and histological evidence supporting this interpretation remains poorly documented.
Caio A. Scartezini   +3 more
wiley   +1 more source

Validation of a Sensor System Solution for Process Monitoring in Robot Assisted Polishing [PDF]

open access: yes, 2013
It was validated the possible correlation between hidden process variables (AE, force, power consumption) and the vital quality characteristic (roughness) for robot assisted flat polishing with diamond paste.\nIt was also validated the possibility of in ...
Dazzi, Mattia
core  

New fossil unveils the dentary anatomy of the rare lepidosauromorph Cargninia enigmatica from the Upper Triassic of Southern Brazil

open access: yesThe Anatomical Record, EarlyView.
Abstract Nowadays, Lepidosauria is a diverse group represented by squamates and the rhynchocephalian tuatara. However, their origins date back to the end of the Permian Period, when the stem lineages Lepidosauromorpha and Archosauromorpha diverged. Within the lepidosauromorph stem lineage, a few species have been described with unstable phylogenetic ...
Lísie Vitória Soares Damke   +4 more
wiley   +1 more source

Tooth histotype and enameloid microstructure of Priohybodus arambourgi d'Erasmo, 1960 (Elasmobranchii: Hybodontiformes) from the Late Jurassic of northeastern Brazil

open access: yesThe Anatomical Record, EarlyView.
Abstract Sharks possess varied diets and different prey capture mechanisms. As a result, the group exhibits a significant diversity in dental morphology, also reflecting the internal structures of the teeth. Internal dental anatomy points to the existence of three histotypes in elasmobranch phylogeny: orthodont, osteodont, and pseudoosteodont ...
Kelly Roberta da Silva   +2 more
wiley   +1 more source

First Record of Tasmanian Devils in the Pilbara: Late Quaternary Subfossils From Juukan Gorge, Puutu Kunti Kurrama Country, and Insights Into Human—Faunal Relationships and Extinction

open access: yesArchaeology in Oceania, EarlyView.
ABSTRACT This study presents the first unequivocal evidence for the presence of Tasmanian devils (Sarcophilus harrisii) in the Pilbara region of northwestern Australia, based on material recovered from archaeological excavations at Juukan Gorge on Puutu Kunti Kurrama and Pinikura country.
Timothy J. Churchill   +5 more
wiley   +1 more source

Microbial contamination of pumice used in dental laboratories

open access: yesHealthcare in Low-resource Settings, 2013
Dental appliances as well as sending and receiving prosthesis from laboratories are potential sources of cross-contamination for technicians, dentists, patients and can transmit different infectious agents as well.
Farzaneh Firoozeh   +4 more
doaj   +1 more source

Irregular, Adaptive Scan Trajectories for Pulsed Laser Micro Polishing [PDF]

open access: yes, 2013
The objective of this work is to generate irregular, smooth, adaptive laser scan trajectories for pulsed laser micro polishing (PL?P). Traditionally PL?P, like other surface finishing processes has used zigzag scan paths.
Li, Xiaochun   +4 more
core  

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