Back to AI Flashcard MakerAnatomy and Physiology /Chapter 8: Embryology and Histology
Chapter 8: Embryology and Histology
This deck covers key concepts in embryology and histology, focusing on the development and structure of teeth and related tissues.
Enamel forming cells are
Ameloblasts
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Key Terms
Term
Definition
Enamel forming cells are
Ameloblasts
Denton forming cells are
Odontoblasts
Cementum forming cells are
Cementoblasts
Cells that resorb cementum are
Cementoclasts
Cells that resorb bone
Osteoclasts
Embryology is the study of
Prenatal development
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| Term | Definition |
|---|---|
Enamel forming cells are | Ameloblasts |
Denton forming cells are | Odontoblasts |
Cementum forming cells are | Cementoblasts |
Cells that resorb cementum are | Cementoclasts |
Cells that resorb bone | Osteoclasts |
Embryology is the study of | Prenatal development |
Histology is the study of | Structure and function of tissues of the teeth |
Prenatal development | Begins at the start of pregnancy and continues until birth |
Stomodeum | The primitive mouth |
The stomodeum and primitive pharynx merge to form part of the mouth during what week of prenatal development | 4th week |
Ectoderm | Outer layer |
Mesoderm | Middle layer |
Endoderm | Inner layer |
Enamel developmental tooth organ | Enamel organ, in the ectoderm layer |
Dentin developmental tooth organ | Dental papilla in the mesoderm |
Cementum developmental tooth organ | Dental sac, mesoderm |
Pulp developmental tooth organ | Dental papilla, endoderm |
Pulp forming cells | Fibroblasts |
What replaces bone | Deposition |
What removes bone | Resorption |
First brachial arch | Maxillary process and mandibular process |
Second brachial arch | Hyoid arch |
Third brachial arch | Forms body of the hyoid and posterior of tongue |
Fourth, fifth and sixth brachial arches | Form structures of lower throat, thyroid cartilage and muscles and nerves of pharynx and larynx |
The development of the soft and hard palate occurs when | during 5th week of development- week 8-12 |
Primary palate | Shelf that supersets oral and nasal cavities |
Secondary palate | Final palate formed, will extend to form soft palate |
Fusion of the palate begins and completes | 9th week, ends in 12th week |
3 stages of palate development | Primary palate, secondary palate and fusion of the palate |
Disruption in the fusion of the palate will result in a | Cleft lip/palate |
Developmental disturbance factors | Genetic- tooth and jaw size or dental anomalies
Environmental- teratogens |
All primary teeth are developed by what week | 17th week |
At birth there are how many teeth in various stages of development | 44 teeth |
Ondotogenesis is the process of | Tooth formation |
Bud stage | Also known as initiation
| - formation of tooth begins |
Cap stage | Also known as proliferation
| - cells of developing tooth increase |
Bell stage | Also known as histodifferentiation and morphodifferentiation
different tissues of the tooth form and shape is established |
During bud stage: | Ectoderm cells thicken forming the dental lamina |
Dental lamina | Thick band of oral epithelium that follows the curve of each developing arch |
Tooth buds | Enlargements produced by the formation of dental lamina |
Succedaneous teeth | Permanent teeth that replace primary teeth |
Dental papilla | Gingiva between the teeth |
Dental sac | Connective tissue that envelops the developing tooth |
Apposition | Ameloblasts deposit soft matrix of enamel
Odontoblasts deposit soft matrix of dentin |
Calcification | Deposits of calcium, phosphorus and other minerals to strengthen structure
Starts from the crown and moves toward root |
Pits | Enamel defect, small pinpoint hole |
Fissures | Grooves on biting surface |
Eruption | November of tooth into its functional position in the oral cavity |
Primate spaces | Spaces between primary teeth |