3.6 POJA-L111. Enamel 1 in longitudinal section of tooth

3.6  POJA-L111

Title: Enamel 1 in longitudinal section of tooth

Description:
Thin ground section, human adult. Enamel is compact and acellular, and consists of vertical stacks of rods (prisms) as well as interrod (interprismatic) regions with less calcifying substance parallel to each other. Each prism is surrounded by an enamel sheath (a non-mineralized organic substance).
From left to right:
-  Surface of enamel.
-  The parallel arrangement of stacks is evident: one light track                represents one stack of rods (prisms); the dark parallel lines                  stand for the interrod substance.
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​3.6  POJA-L114A

Title: Enamel 2 in longitudinal section of tooth

Description:
Thin ground section, human adult.  From left to right:

• Incremental lines (striae) of Retzius are distinctly shown as oblique ​broad zones (at the left) to the enamel surface; during formation of the crown  successive apposition of layers of enamel is deposited and results in these so-called incremental grow lines.
• Surface of enamel in cervical region.
• The parallel arrangement of stacks of rods (prisms) is evident.                

3.6 POJA-L114A. Enamel 2 in longitudinal section of tooth

3.6 POJA-L160. Enamel 6 in longitudinal section of tooth

3.6  POJA-L160  

Title: Enamel 6 in longitudinal section of tooth

Description:
Thin ground section, polarizing microscopy (optical axes of the polarizing plates are crossed at 60°), human adult.
Left side enamel and at right side dark-stained striation of dentin. Wavy course of enamel prisms from dentinoenamel junction (right side, scalloped appearance) to the left. The transparent areas represent enamel lanes at a different polarizing angle.
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3.6  POJA-L138 

Title: Enamel 4 in longitudinal section of tooth

Description:
Thin ground section, polarizing microscopy (optical axes of the polarizing plates are crossed at 60°), human adult.
Using polarizing microscopy the birefringence of the crystalline structure of enamel is colourful demonstrated. It is also a different approach to detect striae and bands or lines. Left: incremental lines (striae) of Retzius are well shown as straight oblique zones. Note the parallel lines of enamel stacks at the left corner of the picture.
At the right side: parallel dark bands of Hunter-Schreger, the dentinoenamel junction and lightly coloured dentin with tubules. 


​Keywords/Mesh: oral cavity, mouth, tooth, enamel, enamel rod, enamel prism, dentinoenamel junction, incremental line, Retzius, histology, POJA collection

3.6 POJA-L138. Enamel 4 in longitudinal section of tooth

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