Enamel microarchitecture of a tribosphenic molar

Journal of Morphology
Frantisek SpoutilIvan Horácek

Abstract

The tribosphenic molar is a dental apomorphy of mammals and the molar type from which all derived types originated. Its enamel coat is expected to be ancestral: a thin, evenly distributed layer of radial prismatic enamel. In the bat Myotis myotis, we reinvestigated the 3D architecture of the dental enamel using serial sectioning combined with scanning electron microscopy analyses, biometrics of enamel prisms and crystallites, and X-ray diffraction. We found distinct heterotopies in enamel thickness (thick enamel on the convex sides of the crests, thin on the concave ones), angularity of enamel prisms, and in distribution of particular enamel types (prismatic, interprismatic, aprismatic) and demonstrated structural relations of these heterotopies to the cusp and crest organization of the tribosphenic molar. X-ray diffraction demonstrated that the crystallites composing the enamel are actually the aggregates of much smaller primary crystallites. The differences among particular enamel types in degree of crystallite aggregation and the variation in structural microstrain of the primary crystallites (depending upon the duration and the mechanical context of mineralization) represent factors not fully understood as yet that may cont...Continue Reading

References

Dec 1, 1987·Advances in Dental Research·K S Lester, A Boyde
Sep 1, 1967·Journal of Dental Research·K A Kermack
Jan 1, 1995·Connective Tissue Research·D DeutschA Palmon
Jan 1, 1995·Archives of Oral Biology·S J BrookesW A Bonass
Jan 1, 1997·Journal of Dentistry·R G ChadwickM Tulley
May 9, 2001·Nature·Z X LuoZ Kielan-Jaworowska
Jun 27, 2001·The Journal of Biological Chemistry·R M RavindranathA G Fincham
Jul 25, 2003·Molecular Phylogenetics and Evolution·Michael O WoodburneMark S Springer
Dec 1, 2004·Journal of Morphology·Alistair R Evans, Gordon D Sanson
Feb 8, 2005·Journal of Molecular Evolution·Sidney DelgadoJean-Yves Sire
Mar 19, 2008·Molecular Phylogenetics and Evolution·Sidney DelgadoJean-Yves Sire
Mar 19, 2008·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Peter LucasBrian Lawn

❮ Previous
Next ❯

Citations

Aug 6, 2014·Die Naturwissenschaften·Julia A Schultz, Thomas Martin
Feb 15, 2017·PloS One·Anna KallistováMichaela Fridrichová
Dec 29, 2020·Scientific Reports·Kai R K JägerThomas Martin

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.