Dental Anatomy Midterm 1 Unit 1 and 2 Flashcards
(39 cards)
List the 3 components of Gingival Tissue
- Marginal (free)
- Attached
- Interdental Papilla
What gingival tissue adheres tightly to the alveolar bone?
Attached Gingiva
What is the Interdental Papilla attached to?
To bone as well as the gum tissue found between teeth
What is the mucogingival junction?
The line between the firmer and pinker attached gingiva and the movable and redder alveolar mucosa is the scallop-shaped mucogingival junction
What are the 3 layers of the tooth?
- Extremely hard outer enamel layer
- Moderately hard dentin layer
- Pulp
What are the 4 types of teeth?
- Incisors
- Canines/Cuspids
- Premolars/Bicuspids
- Molars
What are primary teeth?
Deciduous, baby teeth. 1st dentition, 10 maxillary and 10 mandibular.
What are secondary teeth?
Permanent, adult teeth. 16 maxillary and 16 mandibular.
Define succedaneous.
Permanent teeth that replace primary teeth. All teeth except for permanent molars.
Define mixed dentition.
Transitional dentition. Both primary and secondary teeth are present. Usually between ages 5-12.
What are the functions of each teeth?
Incisors - cut and bite
Cuspids - cut, tear, and grasp
Premolars - tear and grasp
Molars - grind/pulverize
What does the periodontium consists of?
- Gingiva
- Cementum
- Periodontal ligament
- Alveolar bone
What does enamel consist of?
96% inorganic (calcium hydroxyapatite crystals)
1% organic
3% water
What is enamel produced by?
Made by ameloblast cells
What does dentin consist of?
70% inorganic (calcium hydroxyapatite.)
20% organic (collagen, mucopolysaccharide ground substance)
10% water
What is dentin produced by?
Laid down as dentinal tubules by odontoblasts
What are the 4 types of dentin?
- Mantle
- Circumpulpal
- Peritubular
- Intertubular
What is mantle dentin?
the outermost layer of dentin and it is the first dentin formed by the odontoblasts
What is cirumpulpal dentin?
layer around the outer pulpal wall
What is peritubular dentin?
found in the walls of the dentinl tubules
What is intertubular dentin?
found between the dentinal tubules
What are the classifications of Dentin?
- Primary - forms the body of the tooth. (mantle and circumpulpal dentin)
- Secondary - forms only after tooth eruption. (narrow band that borders the pulp)
- Tertiary or reparative - forms only in response to trauma to the pulp (caries, attrition, abrasion, restorative procedures)
What does Cementum consists of?
65% inorganic
23% inorganic
12% water
What is cementum produced by?
Cementoblasts lay down cementum along the root surface