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dental anatomy test
chapter 1
| Term | Definition |
|---|---|
| maxilla (maxillary) | upper jaw |
| mandible (mandibular) | lower jaw |
| each tooth has | a crown and a root |
| the crown is covered with | enamel |
| the root is covered with | cementum |
| where are the crown and root joined? | the cementoenamel junction/cervical line/CEJ |
| the neck or side of the tooth is known as? | the cervix |
| anatomical crown | the entire crown and is covered by enamel |
| clinical crown | the portion of the tooth that is visible in the mouth |
| anatomical root | the entire root and is covered by cementum |
| clinical root | the portion of the tooth that cannottermi be seen in the mouth |
| terminal end of the root | root apex |
| if there is more than 1 root what is the name for this? | apices |
| small opening at the end of the root | apical foramen |
| if there is more than 1 root, what are the small openings at the end of the root called? | apical foramina |
| root trunk | area between bifurcation and CEJ |
| bifurcation | any area on the tooth between 2 roots |
| how many roots do your anterior teeth have? | 1 |
| how many roots do your mandibular molars have? | 2 |
| how many roots do your maxillary molars have? | 3 |
| furcation area | the area at which the root branches on multirooted teeth |
| teeth with 2 roots are | bifurcated |
| teeth with 3 roots are | trifurcated |
| portion of the jaw that supports the teeth | the alveolar process or alveolar bone |
| what is the bony socket in which the tooth fits? | the alveolus |
| how many hard tissues are there and what are they? | 3 – enamel, dentin, cementum |
| how many soft tissues are there and what are they? | 1 – pulp |
| chemical composition of enamel | 96% inorganic and 4% organic |
| dentin | mineralized tissue that is harder than bone and cementum but softer than enamel |
| texture of dentin | elastic in nature |
| junction of the dentin and enamel | DEJ or dentinoenamel junction |
| chemical composition of dentin | 70% inorganic and 30% organic |
| when does primary dentin begin to form | before eruption and continues until the tooth fully erupts |
| which dentin forms the bulk of the permanent tooth? | the primary dentin |
| when does secondary dentin begin to form? | after eruption and continues at a very slow rate throughout the life of the tooth |
| what direction does the secondary dentin grow in? | grows in towards pulp as there is always trauma on the tooth (birthing, movement, chewing) that stimulated it to grow |
| another name for tertiary dentin | reparative dentin |
| when does tertiary dentin form | forms in response to irritation and appears as a localized deposit |
| where does tertiary dentin form? | on the wall of the pulp chamber |
| what is cementum? | a bone-like structure that covers the root |
| chemical composition of cementum | 45-50% inorganic and 50-55% organic |
| where is cementum thick and where is it thin? | thin at the CEJ and thicker at the root apex |
| function of cementum | to provide a method for the attachment of the tooth to the alveolar bone |
| what is the DCJ? | dentinocemental junction it is the union of the dentin and the cementum |
| another name for acellular cementum | primary cementum |
| what does acellular cementum cover? | the entire anatomical root |
| another name for cellular cementum | secondary cementum |
| where does the cellular cementum form? | on the apical 1/3 of the root |
| pulp is also known as | nerve of the tooth |
| composition fo pulp | blood vessels, lymph vessels, connective tissue and odontoblasts |
| nutritive functions of the pulp | provides nourishment via blood vessels at the root apex (apical foramen) |
| sensory functions of the pulp | nerve supply of the pulp receives and transmits pain stimuli |
| reparative functions of the pulp | odontoblasts help in the formation of secondary dentin with the tooth is subjected to trauma |
| coronal pulp (pulp chamber) | occupies the crown of the teeth |
| pulp horns | extensions of pulp within the pulp chamber that project toward the cusp tips |
| pulp canal (radicular pulp) | located within the roots of the tooth |
Created by:
presleydlc
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