Development of Dentition

6th

Development of dentition begins around ___ week in utero.

Dental Lamina

Forms as a band of epithelium in the developing jaws.

Proliferation

Local _____________ of cells marks the beginning of individual tooth germs.

Primordium - Ectodermal

__________ of the _________ portion of the teeth is an epithelial thickening in the region of the future dental arch that extends along the entire free margin of the jaws.

Bud Stage

(Stage) Rounded epithelial bud invaginates into ectomesenchyme. Cell proliferation predominates.

Hypodontia/Agenesis

Failure of tooth germ to develop, fewer numbers of teeth develop.

Epithelial Rests

These rests may remain inactive or become activated due to an irritation or stimulus. Cyst develops.

Odontoma / Supernumerary Tooth

Fully differentiated cells may may detach from the enamel organ and result to the formation of?

Cap Stage

(Stage) Formation of enamel organ, dental papilla, and dental follicle.

Cap Stage

(Stage) Start of morpho-differentiation and histo-differentiation.

Bell Stage

(Stage) Cells undergo histodifferentiation into ameloblasts and odontoblasts.

Bell Stage

(Stage) Crown shape becomes defined.

Matrix

Morpho-differentiation occurs before ______ deposition.

DEJ

(Morpho-differentiation) Inner enamel epithelium arranges to form the?

Morpho-differentiation

Marks the end of the proliferative stage, as cells lose their ability to multiply.

Histo-differentiation

Cells become specialized for their specific functions.

Histo-differentiation

It is the forerunner of appositional activity.

Histo-differentiation

Cells differentiate into the future ameloblasts and odontoblasts.

Apposition

A layer-like deposition of a nonvital extracellular secretion in the form of a tissue matrix.

Apposition

Sequential deposition of the formative cells ameloblasts and odontoblasts.

Calcium - Phosphate

Mineralization begins with _______ and ________ deposition.

Calcification (Mineralization)

This stage is characterized by calcium and phosphate ion deposition, which form hydroxyapatite crystals within the enamel and dentin matrix.

Nidus

(Calcification) Preparation of a small _____ occurs around it which results in increased size by the addition of concentric laminations.

Interglobular Dentin

(Calcification) The lack of fusion of calcospherites is microscopically evident in dentin and referred to?

Anyklosis

If normal eruption mechanisms are disturbed.

Shedding (Exfoliation) of Primary Teeth

Initiated by physiological root resorption due to odontoclast activity.