Tag Archives: odontoblast

Dentinogenesis

Odontoblasts

Dentin-forming cells, odontoblasts, which originate from the ectomesenchyme, form a single layer of cells between the dentin and pulp. The cell body is located on the pulpal wall of dentin and the cellular process extends into the dentinal tubule within the mineralized dentin. The cell bodies are from 3 to 5 m wide and 20 to 40 m long depending on the age of the tooth. The odontoblastic process fills the lumen of the dentin tubule and it is composed of a main trunk, with a diameter of 0.5 to 1 m, and lateral branches. Contrary to the cell body, cell organelles (Golgi apparatus, rough endoblastic reticulum or mitochondria) usually do not appear in the odontoblastic process; however, microtubules, filaments and coated vesicles are present. Odontoblasts are connected to each other with interodontoblastic collagen, the so-called von Korff fibers. Frequent bundles of collagen fibrils enter the odontoblast layer from predentin and are present between odontoblast cell bodies. Ultimately they pass through the odontoblast layer into pulp. Histologically, secretory odontoblasts are columnar in shape. A large number of cytoplasmic organelles are identifiable in young odontoblasts, whereas, aged odontoblasts lose their columnar shape and contain a small number of Golgi apparatus and a small-sized rough endoblasmic reticulum. Continue reading →

Hall technique part 2

The Hall technique manipulates the plaque’s environment by sealing it into the tooth, separating it from the substrates it
would normally receive from the host’s diet. The plaque may continue to receive some nutrition from pulpal perfusion, but there is good evidence that if caries is effectively sealed from the oral environment, it does not progress. Continue reading →