divisions of tooth and line and point angles

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20 Terms

1
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what is the thirds of tooth?

to make study and communication easier, the crown and root are divided into three halves

2
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what are the divisions in thirds occluso-gingivally (crown)

  1. cervical third

  2. middle third

  3. incisal/occlusal third

3
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<p>what division is this in the thirds occluso-gingivally (crown)</p>

what division is this in the thirds occluso-gingivally (crown)

  • the occlusal third (incisal third when it is an anterior tooth)

4
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<p>what division is this in the thirds occluso-gingivally (crown)</p>

what division is this in the thirds occluso-gingivally (crown)

middle thirds

5
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<p>what division is this in the thirds occluso-gingivally (crown)</p>

what division is this in the thirds occluso-gingivally (crown)

cervical third

6
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what are the divisions in the thirds-mesio-distally (crown)

crown when viewed from the front

  1. mesial third

  2. middle third

  3. distal third

7
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<p>what division is this in the thirds-mesio-distally (crown)</p>

what division is this in the thirds-mesio-distally (crown)

distal third

8
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<p>what division is this in the thirds-mesio-distally (crown)</p>

what division is this in the thirds-mesio-distally (crown)

middle third (m-d)

9
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<p>what division is this in the thirds-mesio-distally (crown)</p>

what division is this in the thirds-mesio-distally (crown)

mesial third

10
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what divisions are in the division in the thirds facio-lingually (crown)

crown when viewed from the side:

  1. facial third

  2. middle third

  3. lingual third

11
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<p>what division is this in the facio-lingually (crown)</p>

what division is this in the facio-lingually (crown)

facial third

12
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<p>what division is this in the facio-lingually (crown)</p>

what division is this in the facio-lingually (crown)

middle third (f-l)

13
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<p>what division is this in the facio-lingually (crown)</p>

what division is this in the facio-lingually (crown)

lingual third

14
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what is the thirds-root divided into?

  1. cervical third

  2. middle third

  3. apical third

<ol><li><p>cervical third</p></li><li><p>middle third</p></li><li><p>apical third</p></li></ol><p></p>
15
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what are line angles?

the junction between two adjacent surfaces. it is named according to the two surfaces sharing in its formation

16
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what are point angles?

the junction between three adjacent surfaces and is named according to the three surfaces sharing in its formation meeting in a point

17
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what are the line angles of anterior teeth?

  1. mesio-labial

  2. disto-labial

  3. mesio-lingual

  4. disto-lingual

  5. labio-incisal

  6. linguo-incisal

18
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what are the line angles of posterior teeth?

  1. mesio-buccal

  2. disto-buccal

  3. mesio-lingual

  4. distal-lingual

  5. mesio-occlusal

  6. disto-occlusal

  7. bucco-occlusal

  8. linguo-occlusal

19
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what are the point angles of anterior teeth?

  1. mesio-labio-incisal

  1. disto-labio-incisal

  2. mesio-linguo-incisal

  3. disto-linguo-incisal

20
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what are the point angles of posterior teeth?

  1. mesio-bucco-occlusal

  2. disto-bucco-occlusal

  3. mesio-linguo-occlusal

  4. disto-linguo-occlusal

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