Results 71 to 80 of about 419,155 (253)

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

The 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, Vitória Zanchett Dalle‐Laste, Leonardo Kerber, Lúcio Roberto‐da‐Silva, Rodrigo Temp Müller   +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

The 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, Valéria Gallo, Estevan Eltink   +2 more
wiley   +1 more source

Morphology and Morphometrics of the Mandibular Canal in a Black South African Population

Anatomia
Background/Objectives: Damage to the contents of the mandibular canal is of great concern during endodontological procedures, particularly in the region of the mandibular molar teeth due to their proximity to the mandibular canal.
Onkarabetse Bokamoso Losabe, André Uys, René Human-Baron   +2 more
doaj   +1 more source

Anatomy and variation in the paraphyletic Mosasaurus lemonnieri assemblage from the Craie phosphatée de ciply, Belgium

The Anatomical Record, EarlyView.
Abstract Nineteenth century excavations of the Ciply‐Malogne Phosphatic Chalk Formation in Hainaut, Belgium, yielded over 50 partial mosasaur skeletons, the majority of which were referred to the species Mosasaurus lemonnieri Dollo, 1889. In the years since, this taxon has experienced a complicated taxonomic history, and its exceptional hypodigm has ...
Henry S. Sharpe, Hallie P. Street‐Sampson, Takuya Konishi, Michael W. Caldwell   +3 more
wiley   +1 more source

Topography of the mandibular canal in male human skulls originating from different time periods

Folia Morphologica
BACKGROUND: Dynamic advances in dentistry, especially in implantology has inspired researchers to carry out many studies investigating the topography of the mandibular canal and its ethnic differences.
Aleksandra Gawlikowska-Sroka, Łukasz Stocki, Jacek Szczurowski, Wioletta Nowaczewska, Małgorzata Światłowska-Bajzert   +4 more
doaj   +1 more source

Redescription of the cranial morphology of Amphisbaena braestrupi and Amphisbaena laurenti (Squamata: Amphisbaenidae) from the Pleistocene of Brazil using x‐ray computed tomography

The Anatomical Record, EarlyView.
Abstract Amphisbaenians (Squamata: Amphisbaenidae) are fossorial reptiles with highly specialized cranial morphology, yet their fossil record is frequently limited by fragmentary preservation. This study provides a detailed osteological redescription of the skulls of Amphisbaena braestrupi and Amphisbaena laurenti from the Pleistocene of Lagoa Santa ...
Carolina L. Paiva, Henrique C. Costa, Christy A. Hipsley   +2 more
wiley   +1 more source

C-shaped root canal systems in the bilateral mandibular first molars: a case report and literature review

BMC Oral Health
Background Mandibular first molars typically exhibit complex root and canal anatomy. A thorough understanding of their morphological variations is crucial for endodontists to achieve successful root canal treatment.
Rongjing Zhou, Lili Shen, Chengshi Wei
doaj   +1 more source

A workflow for 3D printing highly accurate, customized human skull models for anatomical education and clinical practice

Anatomical Sciences Education, EarlyView.
Our custom workflow creates anatomically accurate and diverse 3D skull models. Precise sex‐specific anatomical detail is ensured by CT‐based segmentation. Our models capture anatomical variations and pathologies. Our cost‐effective 3D printing workflow enhances model durability and fidelity.
Marina Moser, Michel Beyer, Magdalena Müller‐Gerbl, Sandra Blache, Florian M. Thieringer, Szilvia Mezey   +5 more
wiley   +1 more source

Endodontic Retreatment Of Mandibular Incisors With Root Canals Variations

International Dental Journal
Introduction: Mandibular incisors have been found to have a complex anatomy of the root canal system. Missed root canals are the most likely cause of treatment failure, and the persistent intra-radicular infections can lead to periapical lesion and ...
Kai Chen, Yuxia Shi, Ni Li
doaj   +1 more source

A cone-beam computed tomography study of C-shaped root canal systems in mandibular second premolars in a Taiwan Chinese subpopulation

Journal of the Formosan Medical Association, 2018
Background/Purpose: The purpose of this study is to investigate the prevalence and the morphologic characteristics of the radicular groove and root canal system in human mandibular second premolars with C-shaped root in a Taiwan Chinese subpopulation ...
Yi-Chin Chen, Chia-Lun Tsai, Yi-Chen Chen, Gin Chen, Shue-Fen Yang   +4 more
doaj   +1 more source