Oral Embryology and Histology Chapter 8
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Questions and Answers

_______ is the study of prenatal development.

Embryology

_____ is the study of the structure and function of tissues on a microscopic level.

Histology

_____ begins at the start of pregnancy and continues until birth.

Prenatal Development

The __________ extends from the beginning of the second week to the end of the eighth week.

<p>Embryonic Period</p> Signup and view all the answers

The union of the male sperm and the ovum of the female is ________.

<p>Conception</p> Signup and view all the answers

_________ teeth are permanent teeth with primary predecessors; examples are the anterior teeth and premolars.

<p>Succedaneous</p> Signup and view all the answers

The tissues that support the teeth in the alveolar bone are ______.

<p>Periodontium</p> Signup and view all the answers

Enamel-forming cells are _____.

<p>Ameloblasts</p> Signup and view all the answers

_______ are dentin-forming cells.

<p>Odontoblasts</p> Signup and view all the answers

_______ are cementum-forming cells.

<p>Cementoblasts</p> Signup and view all the answers

Cells that resorb cementum are ________.

<p>Cementoclasts</p> Signup and view all the answers

_______ are cells that resorb bone.

<p>Osteoclasts</p> Signup and view all the answers

The normal process of shedding primary teeth is ______.

<p>Exfoliation</p> Signup and view all the answers

Oral mucosa is made up of _________________.

<p>Stratified squamous epithelium</p> Signup and view all the answers

Oral mucosa that covers the hard palate, dorsum of the tongue, and gingiva is ____________.

<p>Masticatory mucosa</p> Signup and view all the answers

Name the first period of prenatal development.

<p>Preimplantation period</p> Signup and view all the answers

Which period of prenatal development is the most critical?

<p>Embryonic period</p> Signup and view all the answers

The embryonic layer that differentiates into cartilage, bones, and muscles is _________________.

<p>Mesoderm</p> Signup and view all the answers

Which branchial arch forms the bones, muscles, nerves of the face, and the lower lip?

<p>First</p> Signup and view all the answers

Which branchial arch forms the side and front of the neck?

<p>Second</p> Signup and view all the answers

The hard and soft palates are formed by the union of the primary and secondary _______.

<p>Palates</p> Signup and view all the answers

When does the development of the human face occur?

<p>Fifth and eighth weeks</p> Signup and view all the answers

At birth, how many teeth are in various stages of development?

<p>44</p> Signup and view all the answers

What factor can have a prenatal influence on dental development?

<p>Genetics and environment</p> Signup and view all the answers

Name the process for the laying down or adding of bone.

<p>Deposition</p> Signup and view all the answers

Name the process of bone loss or removal.

<p>Resorption</p> Signup and view all the answers

Growth, calcification, and _________ are the three primary periods in tooth formation.

<p>Eruption</p> Signup and view all the answers

The final stage in the growth period is the _______.

<p>Bell stage</p> Signup and view all the answers

What is formed in the occlusal surface when multiple cusps join together?

<p>Fissure and pit</p> Signup and view all the answers

What is the name of the process by which teeth move into a functional position in the oral cavity?

<p>Eruption</p> Signup and view all the answers

The portion of a tooth that is visible in the mouth is the _______.

<p>Clinical crown</p> Signup and view all the answers

The cementoenamel junction is located ___________.

<p>Between the cementum and enamel</p> Signup and view all the answers

The hardest substance in the human body is ________.

<p>Enamel</p> Signup and view all the answers

What is the name of the largest mineral component in enamel?

<p>Calcium</p> Signup and view all the answers

Pain is transmitted through dentin by way of _______.

<p>Dentinal tubules</p> Signup and view all the answers

The type of dentin that is also known as reparative dentin is _________.

<p>Tertiary dentin</p> Signup and view all the answers

The pulp is made up of _______.

<p>Blood vessels and nerves</p> Signup and view all the answers

What type of cells form the intracellular substance of the pulp?

<p>Fibroblasts</p> Signup and view all the answers

The primary function of the periodontal ligament is _________.

<p>To support, maintain, and retain the tooth</p> Signup and view all the answers

Which type of oral mucosa forms the inside of the cheeks, lips, and soft palate?

<p>Lining mucosa</p> Signup and view all the answers

Study Notes

Embryology and Histology Basics

  • Embryology is the study of prenatal development.
  • Histology focuses on the structure and function of tissues at a microscopic level.
  • Prenatal development starts at conception and ends at birth.

Key Developmental Periods

  • Embryonic period spans from the beginning of the second week to the end of the eighth week, which is critical for development.
  • Preimplantation period is the first phase of prenatal development.

Conception and Tooth Development

  • Conception is the union of male sperm and female ovum.
  • Succedaneous teeth are permanent teeth that replace primary predecessors, e.g., anterior teeth and premolars.
  • Exfoliation is the natural process of shedding primary teeth.

Supporting Structures and Cells

  • Periodontium is the tissue that supports teeth within the alveolar bone.
  • Ameloblasts are responsible for enamel formation, while odontoblasts form dentin and cementoblasts are for cementum.

Bone Resorption and Formation

  • Cementoclasts resorb cementum, while osteoclasts are involved in bone resorption.
  • Bone deposition refers to the process of adding bone.

Oral Mucosa Types

  • Oral mucosa consists of stratified squamous epithelium.
  • Masticatory mucosa covers areas like the hard palate and dorsum of the tongue, important for chewing.
  • Lining mucosa is found inside the cheeks, lips, and soft palate.

Face and Palate Development

  • The development of the human face occurs between the fifth and eighth weeks of gestation.
  • The hard and soft palates develop from the union of primary and secondary palates.

Dental Development Insights

  • By birth, there are 44 teeth in various stages of development.
  • Genetics and environmental factors significantly influence prenatal dental development.

Tooth Formation Processes

  • Tooth formation involves growth, calcification, and eruption.
  • The bell stage represents the final stage in the growth period of teeth.

Tooth Structure and Composition

  • The clinical crown is the part of the tooth visible in the mouth.
  • The cementoenamel junction is situated between the cementum and enamel.
  • Enamel, the hardest substance in the human body, has calcium as its largest mineral component.

Pain and Dentin

  • Pain signals are transmitted through dentin via dentinal tubules.
  • Tertiary dentin, also known as reparative dentin, forms in response to stimuli.

The Dental Pulp and Supporting Tissues

  • The dental pulp contains blood vessels and nerves essential for tooth vitality.
  • Fibroblasts create the intracellular substance of the pulp.
  • The primary function of the periodontal ligament is to support, maintain, and retain teeth.

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Test your knowledge of Chapter 8 on Oral Embryology and Histology with these flashcards. This quiz covers key terms and concepts related to prenatal development and tissue structure. Perfect for students looking to reinforce their understanding of embryology and histology.

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