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32 Cards in this Set
- Front
- Back
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A permanent tooth that moves into position formerly occupied by a primary tooth is called what?
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Succedaneous tooth
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What are the succedaneous teeth/
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Permanent Cent. and Lat. Incisors, Cannes, and 1st and 2nd pre-molars
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What are non-succedaneous teeth/
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Permanent first, second and third molars
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When does calcification of the roots take place?
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Completed by age three or four
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When does active eruption of the teeth take place?
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After one-half of the root is formed
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What is the eruption and sheding times for primary Max. central incisors?
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8-12 mos.
6-7 yrs. |
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What is the eruption and sheding times for primary Max. lateral incisors?
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9-13 mos.
7-8 yrs. |
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What is the eruption and sheding times for primary Max. canines?
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16-22 mos.
10-12 yrs. |
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What is the eruption and sheding times for primary Max. first molars?
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13-19 mos.
9-11 yrs. |
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What is the eruption and sheding times for primary Max. second molars?
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25-33 mos.
10-12 yrs. |
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What is the eruption and sheding times for primary Mand. central incisors?
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6-10 mos.
6-7 yrs. |
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What is the eruption and sheding times for primary Mand. lateral incisors?
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10-16 mos.
7-8 yrs. |
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What is the eruption and sheding times for primary Mand. canines?
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17-23 mos.
7-8 yrs. |
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What is the eruption and sheding times for primary Mand. first molars?
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14-18 mos.
9-11 yrs. |
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What is the eruption and sheding times for primary Mand. second molars?
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23-31 mos.
10-12 yrs. |
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What is the phenomenon called when primary teeth are exfoliated?
What happens in this process? |
Resorption
Caused when the permanent tooth starts to create pressure against the primary tooth, resorption continues until the root is gone and the crown is free to be exfoliated |
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Teeth usually erupt in _____.
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Pairs
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Where do permanent mandibular anterior teeth erupt in relation to the primary teeth?
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Lingual to the mandibular primaries
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Whose teeth usually erupt first, girls or boys?
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Girls
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Do max. or Mand. teeth usually erupt first/
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Mand.
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Do slender or thicker children usually have their teeth erupt first?
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Slender children
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What is the deciduous dental formula in man?
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I 2/2 - C 1/1 - M 2/2
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When do the crowns of all 20 primary teeth begin to calcify?
How long do they take to complete? |
Between 4-6 months in utero
10 mos. |
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How long does it take for the root of a primary tooth to be completely formed?
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About one year after eruption of that tooth into the mouth
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What is the permanent dental formula of man?
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I 2/2 - C 1/1 - B 2/2 - M 3/3
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As soon as a child gets her _____ she is considered to be in mixed dentition.
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Permanent first molars (usually mandibular)
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When does the mixed dentition period end?
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With the exfoliation of the last primary tooth (usually max. canine)
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How long is the primary dentition period?
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6 mos. to 6 yrs.
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How long is the mixed dentition period?
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6 to 12 yrs.
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How long is the permanent dentition period?
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12+ yrs.
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What is the rule of four in regards to eruption of primary teeth?
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Starting at 7 months 4 teeth have erupted and every four months there will be four more teeth and so on until 23 months when all 20 primary teeth have erupted
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At the time of eruption what is the status of root formation for permanent teeth?
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About 50% of the root is formed at the time of eruption and it takes 2-3 years for the apex to fully develop after eruption
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