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67 Cards in this Set
- Front
- Back
Which teeth are wider mesiodistally and shorter incisocevically in the crown?
Primary/Permanent |
Primary
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Which crowns are longer and wider mesiodistally at the cervical third of the crown?
Primary/Permanent |
Permanent
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Which roots taper more rapidly?
Primary/Permanent |
Primary
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Which roots are shorter and wider?
Primary/Permanent |
Permanent
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Which kind of tooth has enamel ending abruptly at the cervical line, rather than becoming thinner?
Primary/Permanent |
Primary
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What is special about the shape of the Primary first molar?
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Its anatomy is unlike any other tooth in the mouth
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What is the general shape of the primary first molar?
How many cusps? Order of cusp size? |
Oval
4 MB - ML - DB - DL |
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What surface is longer on a primary first molar?
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Buccal longer than lingual
Cervical ridge accross gingiva |
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What are the characteristics of the primary first molar roots?
|
2
mesial longer and wider than distal Apex of mesial is flattened/squared off |
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What is the shape of the occlusal table of the primary first molar?
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rhomboid
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What is the angle shape of the primary first molar on the MB from the occlusal surface?
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Acute angle
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What is the angle of the DB region of the occlusal surface of the primary first molar?
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Obtuse
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When do the primary 1st and 2nd molars first show calcification?
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5-6 months in utero
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How long does it take the root of a deciduous tooth to completely form?
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one year after eruption
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When is the root of a primary mand. central incisor usually formed and calcified?
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18 months of age
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What tooth is the first to begin calcifying?
When? |
Mand. permanent first molar
At birth |
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What are the major differences between the max. primary and Permanent canines?
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Primary:
Cusp - longer and sharper Mesial cusp ridge longer than distal Especially wide and short |
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Which tooth has a very large mesial marginal ridge which resembles a cusp and also has a transvers ridge from ML to MB cusps that is rather large?
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Primary mand. first molar
(Usually hard to restore) |
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What are the characteristics of the Primary mand. 1st molar?
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Does not resemble any other tooth
MB cusp always largest and longest MB cusp occupies 2/3rds of buccal surface ML larger, longer, sharper than DL Crown wider mesiodistally than high cevico-occlusally No central fossa MMR well developed Prominent MB cervical ridge |
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How many developmental lobes does a Primary max. canine have?
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4
MF, MidF, DF, L |
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What shape does the canine have from the facial?
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Pentagonal
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The sum of the mesiodistal width of primary molars in any one quadrant is greater than the permanent premolars which succed them by how much?
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2-5 mm
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Which molars have crowns that are shorter and more bulbous with pronounced buccal and lingual cervical ridgesand a constricted cervical area?
Primary/Permanent |
Primary
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Which molars have an occlusal table that is narrower faciolingually?
Primary/Permanent |
Primary
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Which molars have anatomy that is deeper?
Primary/Permanent |
Permanent
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Which molar has a prominent mesial cervical ridge that makes it easier to distinguish from rt. and lt.?
Primary/Permanent? |
Primary
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What molars have roots that are shorter and wider?
Primary/Permanent |
Permanent
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What molars have roots that are extremely narrow mesiodistally and very broad buccolingually?
Primary/Permanent |
Primary
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Which molar has roots that are less divergent and more curved with a large root trunk?
Primary/Permanent |
Permanent
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How do primary Incisors differ from permanent incisors?
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Newly erupted permanent incisors do not show mamelons
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What is the only Incisor with a mesiodistal diameter greater than its crown height?
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Primary max. central incisor
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Which Max. central tooth has a longer inciso-cervical length?
Primary/Permanent |
Permanent
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Which max. central incisor has a straighter incisal edge?
Primary/Permanent |
Primary
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Which Max. incisors have more prominent labial and lingual cervical ridges?
Primary/Permanent |
Primary
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What is the largest primary tooth?
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Mand. second molar
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What is the smallest primary tooth?
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Mand. lateral incisor
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What is the largest permanent tooth?
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Max. first molar
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What is the smallest permanent tooth?
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Mand. central incisor
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Which primary molar is the most atypical of all molars, primary and permanent, and appears to be intermediate in form and development between a premolar and a molar?
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Primary max. first molar
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What is the tooth that is the smallest molar in all dimensions except labiolingual diameter?
|
Max. primary first molar
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How many cusps does a primary max. first molar have?
|
2 Main
Wide MB Narrow ML 2 Indistinct - DB, DL |
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Which cusp of the Primary Max. first molar is the longest?
|
MB
ML second longest/but sharpest |
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Where is the cervical line of the Primary Max. first molar?
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Cervical line is higher mesially than distally
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Where does the cervical ridge of the primary max. first molar stand out distinctly?
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Mesiobuccal portion of the tooth
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What is the occlusal pit pattern of the Primary max. first molar?
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H-shaped
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What are the characteristics of the Primary max. first molars roots?
|
3
form resembles permanent max. first molar |
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Which surface on the primary first molar crown is larger?
Mesial/Distal |
Mesial
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What spaces are present between primary max. lateral and canines and primary mand. canine and premolars?
|
Primitive spaces
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In what kind of dentition do primate spaces appear?
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Deciduous dentition
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When do primate spaces become present?
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Normally present from the time the teeth erupt
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What are the primate spaces usually a result of?
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Caused by growth of the dental arches
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How do the cusps of the primary mand. second molar differ from the permanent mand. first molar?
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Primary molar has = MB, DB, and distal cusps
Permanent molar has smaller distal |
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What is the difference between the mand. primary second molar, and the mand. permanent first molar as seen from the buccal aspect?
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Primary is is narrower mesiodistally at the cervical part of the crown than at the contact level
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Why are primary mand. second molars teeth with divergent roots?
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They allow for eruption of the permanent second premolar
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Which molars have the greatest faciolingual diameter of all primary teeth?
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Primary second molars
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What are the primary teeth which present the most noticeable morphologic deviations from permanent teeth?
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Primary first molars
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What tooth does the Primary max. second molar most resemble?
|
Permanent Max. first molar (smaller)
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Which primary molars are the larger size and most closely resemble the permanent first molars?
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Primary second molars
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What are primary molar relationships known as?
|
Step relationships
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The distal surface of the lower second primary molar is mesial to the distal surface of the upper second primary molar.
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Mesial-step relationship
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What does the mesial step molar relationship allow the permanent first molars to do?
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Allows for normal occlusion immediately on eruption.
(class I occlusion) |
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Situation where the distal surfaces of the max. and mand. second primary molars are in an end to end relationship.
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Flush-terminal-plane relationship
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What is a flush-terminal-plane relationship also known as?
|
flat-plane relationship
end-to-end relationship |
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What class of occlusion results from a flush-terminal-plane relationship?
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Class II relationship
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When a class II relationship is adjusted do to the loss of primary max. second molars thus gaining a Class I occlusion.
When does this happen? |
Late mesial shift
occurs at age 10-11 |
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Distal surface of the mand. primary second molar is located to the distalsurface of the max. primary second molar.
|
Distal step relationship
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What relationship results from a distal step?
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Class II relationship
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