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81 Cards in this Set
- Front
- Back
What is the correct order of the softest tooth tissue to the hardest?
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Cementum, Dentin, Enamel
(CDE) |
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What is the correct order of the tooth tissue with the most organic composition to the lease organic?
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Cementum, Dentin, Enamel
(CDE) |
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What is the name of the type of cell that forms dentin
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Odontoblasts
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Cementum is formed from cementocytes which originate in the
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PDL
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In which location will you not find evidence of any part of an odontoblast?
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Cementum- lacunae
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Which tissue will not remain intact if its formative cells die?
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Pulp
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Same or different?
Irregular dentin, reactive dentin, tertiary dentin |
Same
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Same or different?
Tome's fiber, dentinal fiber, odontoblastic process |
Same
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Same or different?
Dead tract, sclerotic dentin, secondary dentin? |
Different
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During odontogenesis when the dentin forms around the dental papilla, the inner most tissue of the papilla is considered the?
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Pulp
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The histiocytes in which tooth tissue can help fight infection?
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Pulp
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What is not a significant clinical effect of the death of the cells of the pulp?
Dentin formation ceases Cementum formation ceases Tooth becomes brittle Tooth cannot sense pain |
Cementum formation DOES NOT cease
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Tetracycline stains are difficult to bleach or whiten due to most of the stain being in the ?
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Enamel and dentin
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Because of its mineral level, cementum appears more...
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Radiolucent (darker)
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Which formation is least normal?
Secondary dentin hypercementosis interglobular dentin |
Hypercementosis
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Which is not a problem that denticles may cause?
Restriction of blood flow in pulp Cementicle formation difficult root canal procedure |
Cementicle formation
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Which of the following is not a true statement about cementum?
It protects the dentin of the root New cementum formation is much greater closer to the apical end of the root. it helps compensate for occlusal wear of enamel It lines the pulp |
It DOES NOT line the pulp- dentin does.
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Usually extra sensitive areas in dentin may be caused by hypocalcified areas such as:
dead tracts and sclerotic dentin Tome's granular layer and interglobular dentin Reactive dentin and Owen's lines of contour Secondary denting and dentinal tubules |
Tome's granular layer and interglobular dentin can cause extra sensitive areas.
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After the loss of the Tome's fiber , a dentinal tubule which has filled in solid is called
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sclerotic dentin
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The unit of pattern of formation of enamel is called the
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Rod
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Sharpey's fibers do not anchor to
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Enamel
They do anchor to the lamina dura of the alveolar bone and the cementum |
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Pulp stones are usually painful
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False
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Cervical abrasion of teeth can result in exposed dentin, causing sensitivity
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True
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The dentinoenamel junction is where the enamel meets secondary dentin
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False
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The most newly formed cementum is located nearest to the dentin
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False- forms outward
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Cementum formation begins before enamel
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False
Dentin first, enamel, then cementum (DEC) |
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Hunter- Schreger bands are histological features found in dentin
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False they are found in enamel
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Dentin formation continues throughout life as long as the tooth is vital
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True
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Cementum formation begins before enamel formation
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False
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Enamel Rods are parallel to the dentin- enamel junction
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False- perpendicular
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The functions of the pulp include formative, sensory, nutritive, and protective
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True
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The embryologic background of cementum and dentin would tend to make the cemento-dentin junction less defined than the dentin-enamel junction
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True
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This tissue cannot remain alive throughout life
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Enamel
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The histiocytes in this tooth tissue perform a defensive function
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Pulp
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The stripes of Retzius appear on the surface of enamel as wavy lines called
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Perikymata
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The part of the tooth germ forms pulp tissue
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Dental papilla
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List the softest tooth tissue to the hardest
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Pulp, cementum, dentin, enamel
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Tooth pulp tissue does not include this type of cell
Ameloblast Fibroblast histiocyte odontoblast |
Ameloblast- it is not included in tooth pulp
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Where do pulp stones form
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Pulpal Wall
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Dentin contains tubules within which normally are the cytoplasmic processes of
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odonotoblasts
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The tissue of the pulp is composed mostly of
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Fibrocytes
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The pulp is derived from the
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Dental papilla
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Cementum has a similar inorganic matter to that of
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Bone
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What percentage of dentin is inorganic
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70%
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The most commonly occurring process following tooth eruption
Secondary dentin intraglobular dentin pulp stone in pulp canal Denticle in pulp chamber |
Secondary dentin
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If all of the cells of the tooth pulp die, the tooth will most likely
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No longer form dentin
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The possible locations of parts of an odontoblast include
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Lining of pulp, dentinal tubule, enamel spindle
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Terms that mean the same as reactive dentin
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reparative dentin, irregular dentin
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This tooth tissue looses its formative cells upon eruption
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Enamel
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After the loss of the dentinal fiber, a dentinal tubule that has filled in with other matter is called
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Sclerotic dentin
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The cell which produces dentin is called
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Odontoblasts
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The dentinoenamel junction is where the enamel meets ________ dentin
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Primary dentin
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Pulp stones are only found in the...
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Pulp
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The most newly formed cementum is located nearest to the
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Periodontal ligament
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The one tooth tissue that ectoderm forms
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Enamel
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Denticles will not cause this problem
Difficult root canal Restriction of pulpal blood flow rampant tooth decay |
Rampant tooth decay- pulpal stones do not cause this.
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An odontoblast fiber is normally inside a dentinal tubule
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True
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Incompletely calcified areas in dentin such as these may cause extra sensitivity
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Tome's granular layer and interglobular denting
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Rapid spread of caries is most likely in this tooth tissue
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dentin
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The cells that form enamel
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Ameloblasts
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An individual unit of enamel is formed in this pattern of formation
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Enamel Rod
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Odontoblasts differentiate from mesenchymal cells in the
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Dental papilla
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Proof that cementum develops after enamel is that it
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may overlap enamel
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Cementum has a _________ % of organic material that enamel
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higher- Cementum 23% organic plus 12% water
Enamel 4% |
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Cellular cementum is usually only found near the _____ portion of the tooth
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Apical portion of the root
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Tome's granular layer represents areas of incomplete calcification in the root portion of dentin adjacent to the
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Cementum
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Enamel rods are perpendicular to the
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Dentino enamel junction
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The cell bodies which contain the nucleus of odontoblast cells reside in the
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pulp
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Cementum can protect the tooth root from
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External resorption ( the outer surface of dentin)
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The cell which forms cementum and is not yet within a lacunae is called a
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Cementoblast
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Cementum is derived from the cells that differentiated from
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Periodontal ligament
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Cementum is thinnest at
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The cervical portion of the root
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All portions of the tooth where dentin is found include the
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Root and crown
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All portions of the tooth where cementum is primarily found includes the
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Root
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Cementocytes are cells which are found within
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Cellular cementum
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________ dentin represents areas of hypomineralization between globules of mineralized dentin
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Interglobular
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Newly forming semi mineralized dentin is called
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Predentin or dentinoid
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Secondary dentin is that dentin which is produced
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After eruption or apical closure of the root
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Which group of periodontal ligament fibers will be the ones to most resist chewing forces of biting straight down
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oblique
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What is not a function of the PDL?
Shock absorber reformation of cementum and/ or bone sense pressure on tooth reformation of dentin |
Reformation of dentin
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Which is not involved with tissue reformation during orthodontic movement of a tooth?
Osteoblast Osteoclast Odonontoblast PDL |
Odontoblast
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