Enamel Flashcards
Physical characteristics include:
Hardest tissue in body
Brittle/Inelastic
Semipermeable
Chemical Properties include:
1.5% H20
2.5% Organic Material
96% Inorganic Material
The Organic Material of enamel consist of ______ and _____
Amelogenins
Enamelins
______ are present in early enamel proteins
Amelogenins
______ are present in mature and more mineralized enamel
Enamelins
Enamel Rods course form the ______ and are composed of ______
DEJ
Individual apatite crystals
_____ is organic material that partial surrounds each rod
Rod Sheaths
Ename Rod diameter is _____ at surface than at DEJ
thicker
Areas in which rod bundles intertwine is called; rods twisted around each other
Gnarled Enamel
Alternating light and dark bands caused by changes in prism direction
Hunter-Schreger Bands
Are formed from incremental pattern of enamel rod formation
Incremental Lines of Retzius
Accentuated Lines of Retzius
Neonatal Lines
Incremental lines may be
Hyper/Hypomineralized
Shallow furrows on enamel surface that run horizontally across face of crown
Perikymata
Perikymatas are formed where _____ meet the enamel surface
Incremental Lines
Lines that appear as cracks, filled with enamel proteins and organic debris
Lamellae
Ubiquitous organic deposits on tooth surface
Salivary Pellicle
Plaque readily forms on which surface structure
Salivary Pellicle
Hypomineralized areas projecting away from DEJ, caused by faulty removal of organic matrix
Enamel Tufts
Odontoblastic process that renin in enamel, occur more often in cuspal areas
Enamel Spindles
