Jaringan Lunak

Gingiva

• Note

  kind:

  • free/ marginal
  • attached → pd tulang alveolar
  • interdental

  PALING CEPAT SEMBUH

Ligamen Periodontal

• Note

  between cementum and alveolar bone

  shock absorber (saat mastication)

  Dentoalveolar group:

  

  • Alveolar crest fibers (I) run from the cervical part of the root to the alveolar bone crest
  • Horizontal fibers (J) attach to the cementum apical to the alveolar crest fibers and run perpendicularly from the root of the tooth to the alveolar bone..
  • Oblique fibers (K) are the most numerous fibers in the periodontal ligament, running from cementum in an oblique direction to insert into bone coronally. These fibres resist vertical & intrusive forces
  • Apical fibers are found radiating from cementum around the apex of the root to the bone, forming base of the socket or alveolus.
  • Interradicular fibers are only found between the roots of multirooted teeth, such as premolars and molars. They extend from radicular cementum to interradicular alveolar bone.

Jaringan Keras

Sementum

• Note

  Bone vs Sementum

  Sementum: Avascular, resistant resorption

  Classification

  • Acelullar → sepanjang root
  • Celullar → 1/3 apical

Alveolar Bone Proper

• Note

  Compact bone

  Perforating sharpey fiber

  pinggir→ lamina dura → radiopac

GAMASUK JARINGAN PERIODONTIUM TAPI TITIP DULU

Enamel

• Note

  • Batang enamel (enamel rod) adalah unit dasar dari enamel gigi. - The first layer of enamel that is laid down is amorphous and has no enamel rods (structureless)

    The structural unit of enamel

    • aka enamel prisms due to their high inorganic content and translucency

    • undulate slightly in their course to the enamel surface

    • key hole shape

  • Hunter Schreger bands?because of the orientation of the rods, light and dark bands appear. they are known as Hunter Schreger

    

  • Tomes process= essential for enamel rod formation, each ameloblast have on their surface

  • enamel lamellae= hypomineralized defects in enamel that extend from the surface to the DEJ, and provide access to organisms and toxins directly to the dentin

    

  • enamel tuft= hypomineralized defect, like an enamel lamellae, but only extend 1/3 into the enamel

    

  • enamel spindles

  Very small processes extending a short distance into the enamel. Odontoblasts that got trapped in the 1st layers of enamel to form

  

  • retzius line = lines that are formed IN enamel b/c of changes in the degree or organic and inorganic components in the region

    

    • Enamel = Striae of Retzius
    • Dentin= Contour lines of Owen (what is the result of the periodic mineralization of dentin)

  • Perykimata = are the pits around the long prisms of tooth enamel.

  Tome's process- critical in the formation of enamel rods- ea

  • Neonatal line= adalah pita khusus garis pertumbuhan inkremental yang terlihat pada bagian histologis dari email dan dentin gigi primer dan permanen. Itu dibuat sebagian setelah lahir. Itu milik serangkaian garis pertumbuhan dalam enamel gigi yang dikenal sebagai Striae of Retzius.

  

  

1. What are Hunter Schreger bands?
2. What is essential for enamel rod formation?
3. What is enamel lamellae?
4. What is an enamel tuft?
5. Define the Striae of Retzius
6. What are the defect lines in enamel and dentin known as?
7. True or False. Enamel rods extend from the DEJ to the surface of enamel