Oral Anatomy & Histology Review

This set of flashcards covers essential terms and definitions relating to oral anatomy and histology, particularly focusing on tooth development and associated processes.

Odontogenesis

The process of tooth development.

Ectoderm

The outermost germ layer that forms the skin, lining of oral cavity, tooth enamel, and nervous system.

Mesoderm

The middle germ layer that forms muscles, skeletal system, and tooth structures like dentin and pulp.

Endoderm

The innermost germ layer that forms the lining of internal organs like the stomach and pharynx.

Palate

The roof of the mouth that develops from fusion of premaxilla and lateral palatine processes.

Ameloblasts

Cells that secrete enamel during tooth development.

Dentinogenesis

The process of dentin formation by odontoblasts.

Induction

A process where one group of cells directs the development of another group of cells.

Differentiation

The process by which cells become specialized in structure and function.

Dentinoenamel Junction (DEJ)

The junction between dentin and enamel tissue.

Dental papilla

Condensed ectomesenchyme that differentiates into odontoblasts and dental pulp.

Cementum

A specialized connective tissue that covers the roots of teeth, forming from the dental sac.

Eruption Tunnel

A protective pathway formed by fused epithelium that allows the tooth to erupt into the oral cavity.

Nasmyth Membrane

A membrane that may form on newly erupted teeth, composed of fused tissue from the REE and oral epithelium.

Hertwig's Root Sheath

A structure that shapes the root of the tooth and triggers root dentin formation.

Tooth Exfoliation

The process of shedding primary teeth as permanent teeth develop.

Active Eruption

The vertical movement of the tooth during the eruption process.

Passive Eruption

Occurs with aging where gingival tissue recedes without actual tooth movement.

Epithelial Components

The layers of tissues that compose the enamel organ during tooth development.

Mesenchymal Components

Connective tissue components involved in forming periodontal ligament and dental structures.