Results 61 to 70 of about 437,609 (222)

Histochemical indications for a chemically complex signal produced by the cervical gill slit gland of the pygmy sperm whale (Kogia breviceps)

The Anatomical Record, EarlyView.
Abstract The pygmy sperm whale (Kogia breviceps) possesses an exocrine gland associated with its false gill slit pigmentation pattern. The cervical gill slit gland is a compound tubuloalveolar gland that produces a holocrine secretion and displays maturational changes in size and secretory histology. While the morphology of the cervical gill slit gland
Tiffany F. Keenan, William A. McLellan, Sentiel A. Rommel, Alexander M. Costidis, Craig A. Harms, J. G. M. Thewissen, Susan J. Rehorek, David S. Rotstein, Mark D. Gay, Alison R. Taylor, Heather N. Koopman, Ying Wang, Stephanie Kamel, D. Ann Pabst   +13 more
wiley   +1 more source

C-Jun N-terminal kinase (JNK) pathway activation is essential for dental papilla cells polarization.

PLoS ONE, 2021
During tooth development, dental papilla cells differentiate into odontoblasts with polarized morphology and cell function. Our previous study indicated that the C-Jun N-terminal kinase (JNK) pathway regulates human dental papilla cell adhesion ...
Jiao Luo, Xiujun Tan, Ling Ye, Chenglin Wang   +3 more
doaj   +1 more source

Whole tissue imaging of cellular boundaries at sub‐micron resolutions for deep learning cell segmentation: Applications in the analysis of epithelial bending of ectoderm

Developmental Dynamics, EarlyView.
Abstract Background To understand cellular morphology, biologists have relied on traditional optical microscopy of tissues combined with tissue clearing protocols to image structures deep within tissues. Unfortunately, these protocols often struggle to retain cell boundary markers, especially at high enough resolutions necessary for precise cell ...
Sam C. P. Norris, Jimmy K. Hu, Neil H. Shubin   +2 more
wiley   +1 more source

Fusion of a primary mandibular lateral incisor and canine: A rarity

Archives of Medicine and Health Sciences, 2017
Fusion is a developmental anomaly of dental hard tissues characterized by the union of two adjacent teeth. It may be complete with the formation of an abnormally large tooth or incomplete with the union of crowns or roots only.
Treville Pereira
doaj   +1 more source

Kdf1 Regulates Molar Cusp Morphogenesis via the PI3K/AKT/mTOR Signalling Axis

Cell Proliferation, EarlyView.
Epithelial Kdf1 knockout disrupts molar cusp morphogenesis by promoting inner enamel epithelium proliferation and invagination via PI3K/AKT/mTOR signalling. ABSTRACT Keratinocyte differentiation factor 1 (Kdf1) reportedly plays a significant role in enamel formation.
Jiayu Wang, Miao Yu, Hangbo Liu, Kai Sun, Chenxin Geng, Haochen Liu, Hailan Feng, Yang Liu, Hu Zhao, Dong Han   +9 more
wiley   +1 more source

Impact of Traumatic Injuries to Primary Teeth on the Development of Permanent Dentition: Findings From a Retrospective Cohort

Dental Traumatology, EarlyView.
ABSTRACT Objective This retrospective cohort study aimed to analyze the occurrence of sequelae in permanent teeth resulting from traumatic injuries to primary dentition among children treated over a 14‐year period at a specialized Dental Trauma Center. Methods Data from 140 children with complete records on trauma and sequelae were evaluated.
Vanessa Polina Pereira da Costa, Fernanda Vieira Almeida, Giulia Tarquinio Demarco, Maria Giulia Larroque Silva da Motta, Caroline de Oliveira Langlois, Alexandre Emidio Ribeiro Silva, Marilia Leão Goettems   +6 more
wiley   +1 more source

Bioengineering of a human whole tooth: progress and challenge

Cell Regeneration, 2014
A major challenge in stem cell-based bioengineering of an implantable human tooth is to identify appropriate sources of postnatal stem cells that are odontogenic competent as the epithelial component due to the lack of enamel epithelial cells in adult ...
Yanding Zhang, YiPing Chen
doaj   +1 more source

Sequelae in Permanent Dentition After Traumatic Dental Injury in the Primary Dentition—A Retrospective Cohort Study

International Journal of Paediatric Dentistry, EarlyView.
ABSTRACT Background Luxation injuries to the predecessors can cause sequelae in the permanent successors. Aim To describe and analyze sequelae in permanent successors according to the child's age at the time of different luxation traumas (concussion, subluxation, extrusion, lateral luxation, intrusion and avulsion) in the primary dentition compared ...
Anne‐Marie Folmer, Eva Lauridsen, Josephine Solgaard Henriksen, Nuno Vibe Hermann   +3 more
wiley   +1 more source

Spatiotemporal Changes in Transcriptome of Odontogenic and Non-odontogenic Regions in the Dental Arch of Mus musculus

Frontiers in Cell and Developmental Biology, 2021
Over the past 40 years, studies on tooth regeneration have been conducted. These studies comprised two main flows: some focused on epithelial–mesenchymal interaction in the odontogenic region, whereas others focused on creating a supernumerary tooth in ...
Dong-Joon Lee, Hyun-Yi Kim, Hyun-Yi Kim, Seung-Jun Lee, Han-Sung Jung   +4 more
doaj   +1 more source

Assessment of Alterations in Permanent Premolars After Endodontic Treatment of Predecessor Primary Molars: A Prospective Study

International Journal of Paediatric Dentistry, EarlyView.
ABSTRACT Background The relationship between primary teeth and their successors involves complex interactions that may influence the development of permanent teeth. Aim To evaluate alterations in permanent premolars after endodontic treatment of their primary molar predecessors. Design A prospective study was conducted with children initially aged 5 to
Rafaela Lourdes de Sousa, Elisa Varela de Oliveira, Josiane Pezzini Soares, Nashalie Alencar, Jéssica Barasuol, Pablo Silveira Santos, Mariane Cardoso, Michele Bolan   +7 more
wiley   +1 more source