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Module 7 Orthodontics > Cephalometrics > Flashcards

Cephalometrics Flashcards

1
Q

what is nasion

A

most anterior point of the fronto nasal suture

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2
Q

what is sella

A

midpoint of pituitary fossa

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3
Q

what is point A

A

point at the deepest midline concavity on the anterior maxilla

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4
Q

what is the anterior nasal spine

A

tip of the bony anterior nasal spine

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5
Q

what is the posterior nasal spine

A

tip of the posterior nasal spine

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6
Q

what is point B

A

point at the deepest concavity on the mandibular symphysis

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7
Q

what is pogonion

A

most anterior point of the mandibular symphysis

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8
Q

what is menton

A

most inferior point of the mandibular symphysis

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9
Q

what is gonion

A

intersection of tangents of the ramus plane and the mandibular plane
most posterior and inferior point of the angle of the mandible

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10
Q

what is the SNA angle

A

antero-posterior positioning of the maxilla in relation to cranial base

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11
Q

what does increased SNA angle indicate

A

prognathic maxilla

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12
Q

what does decreased SNA angle dictate

A

retrognathic maxilla

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13
Q

what does SNB angle indicate

A

antero-posterior positioning of the mandible in relation to the cranial base

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14
Q

what does increased SNB angle indicate

A

prognathic mandible

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15
Q

what does decreased SNB angle indicate

A

retrognathic mandible

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16
Q

what does the ANB angle denote

A

position of maxilla and mandible to each other

17
Q

what does an increased ANB angle indicate

A

class II skeletal pattern

18
Q

what does a decreased ANB angle indicate

A

class III skeletal pattern

19
Q

what is the maxillo-mandibular plane angle

A

formed by intersection of the mandibular and maxillary plane

20
Q

what does an increased MMPA indicate

A

vertical growth pattern

21
Q

what does a reduced MMPA indicate

A

horizontal growth pattern

22
Q

what is the E plane

A

ricketts esthetic plane

23
Q

what does the E plane line join

A

soft tissue chin and nose tip

24
Q

in a balanced face what is the lower and upper lip distance to the E plane

A

lower lip - 1-2mm
upper lip - 2-3mm

25
Q
A

Module 7 Orthodontics (3 decks)

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