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2024-2025 College Catalog

DHE 107 - Oral Embryology and Histology

2 Credits, 2 Contact Hours
2 lecture periods 0 lab periods
The development and histology of teeth related to the intra and extra oral tissues of the head as they relate to the practice of dental hygiene. Includes terminology and formation of primary embryonic layers, histology, tooth development, enamel, dentin, and pulp. Also includes cementum, periodontal ligament, bone and alveolar process, mucous membranes, and salivary glands.

Corequisite(s): DHE 101 , DHE 101LC , DHE 104 , DHE 104LB , DHE 112 , DHE 116 , DHE 116LC  
Information: Students must be admitted to the PCC Dental Hygiene program and obtain consent of the Dental Hygiene department before enrolling in this course.
Button linking to AZ Transfer course equivalency guide  

Course Learning Outcomes
  1. Identify normal growth and development of the face and oral structures at the cellular level by distinguishing enamel, dentine, and pulp at the microscopic and macroscopic level. 
  2. Describe the processes of tooth development in utero which correlates to growth and development of oral structures. 
  3. Identify bones, nerves, lymphatic or blood vessels by location and muscles and their relationship to occlusion and mastication.
Performance Objectives:
  1. Describe the processes which occur at the cellular level in the growth and development or oral structures.
  2. Differentiate among enamel, dentin, and pulp at the microscopic and macroscopic level.
  3. Describe the function and characteristics of anatomical structures the head and neck.
  4. Explain the muscles and their relationship to occlusion and mastication.
  5. Identify bones, nerves, lymphatic or blood vessels by location.
  6. Determine injection sites by identifying nerve innervations of individual teeth.
  7. Identify normal growth and development of the face and oral structures.
Outline:
  1. Terminology and Formation of Primary Embryonic Layers
    1. Development of the face and oral cavity
    2. Formation of maxilla and mandible
  2. Introduction / Definitions of Histology
    1. Tissue content
    2. Tissue classification
  3. Tooth Development, Eruption and Exfoliation
    1. Early tooth development
    2. Tooth germ
    3. Eruption
    4. Root, cementum, periodontal ligament formation
    5. Exfoliation
  4. Enamel
    1. Amelogenesis
    2. Composition
    3. Structure and clinical appearance
  5. Dentin/Dentinogenesis
    1. Odontoblasts
    2. Coronal dentin/root dentin
    3. Clinical dentin
  6. Pulp
    1. Composition
    2. Function
    3. Clinical
  7. Cementum
    1. Cementogenesis
    2. Structure and composition
  8. Periodontal Ligament
    1. Location and composition
    2. Principle fibers
    3. Function
  9. Bone and Alveolar Process
    1. Structure and composition of bone
    2. Bone growth
      1. Formation
      2. Resorption
      3. Remodeling
    3. Aveolar process
  10. Mucous Membrane and Salivary Glands
    1. Mucous membranes of the oral cavity
    2. Tongue
    3. Salivary glands

Effective Term:
Fall 2016