49) These findings suggest an interesting hypothesis: an excess in cytoplasmic F- in ameloblast induces stress in the endoplasmic reticulum and activates a defense called "unfolded protein response" (UPR), which decreases the synthesis and secretion of KLK-4, essential for the elimination of the protein matrix of amelogenin and the final maturation of enamel prisms
Referring to Fagrell in 2011, enamel in teeth af- fected by MIH exhibits disorganized enamel prisms
, a porous structure and loosely packed crystallites.
3 Boyde defined the structure of dental enamel and expounded that crystals are organised within enamel prisms
that run from the dentino-enamel junction (DEJ) to the tooth surface.
This technique has claimed to improve fragment retention since enamel beveling alters the enamel prisms
orientation, allowing for achievement of a more effective acid etching pattern.
Directions and interrelationships of enamel prisms
from the sides of human teeth.
11) The side effects of peroxides on enamel include increased enamel porosity, pitting, erosion, demineralization of the periphery of enamel prisms
and mineral loss promoted by the decrease in the inorganic content.
The association of high fever with enamel hypomineralisation during infancy has recently been explained by an experimental study showing that persistent high fever influenced the process of enamel formation, producing disorientation of enamel prisms
and crystal-free areas [Tunk et al.
Since it was possible to remove a piece of the diseased tissue for histopathological examination, we observed thin areas of hypocalcified enamel with irregularly arranged enamel prisms
(CHO, 2006; NICODEMO et al.
smeared 1980 2000 Coarse prophy 1 4-5 [micro]m enamel paste 1981 20 psi Varies 1 5.
The research team compared proline repeats in amphibian and animal models and discovered that when the repeats are short, such as in frogs, teeth will not have the enamel prisms
that are responsible for the strength of human enamel.
At high magnification, enamel prisms
appear hollow and may contain enamel tubules.
The tooth surface after exposure to orange juice appeared to affect the enamel prisms
being exposed and this was visible at all the three magnifications (Figure-2).