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DMD 6375 Ortho > Cephalometrics > Flashcards

Cephalometrics Flashcards

1
Q

What is the porion anatomic landmark?

A

Midpoint of the upper contour of external auditory canal.

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2
Q

What is the sella landmark?

A

Center of the hypophyseal fossa.

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3
Q

What is the nasion landmark?

A

Junction of nasal and frontal bones at the most posterior point on the curvature of the bridge of the nose.

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4
Q

What is the orbitale landmark?

A

Midway between lowest point on inferior margin of the two orbits.

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5
Q

What is Anterior nasal spine landmark?

A

Tip of bony anterior nasal spine on maxilla at nasal base.

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6
Q

What is the posterior nasal spine landmark?

A

Tip of posterior nasal spine of palatine bone, at junction of soft and hard palate.

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7
Q

What is the A-point?

A

innermost curvature from maxillary anterior nasal spine to crest of maxillary alveolar process.

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8
Q

What is the B-point?

A

Innermost curvature from chin to alveolar junction.

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9
Q

What is the Pogonion landmark?

A

Most anterior point on the contour of bony chin.

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10
Q

What is the Gnathion landmark?

A

Most anterior inferior point on bony chin.

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11
Q

What is the Menton landmark?

A

The most inferior point on chin, by the mandibular symphysis.

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12
Q

What is the Gonion landmark?

A

Most posterior inferior point on the outline of the angle of the mandible.

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13
Q

What is the condylion landmark?

A

Most superior posterior point on head of mandibular condyle.

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14
Q

What is the Frankfort Horizontal Line?

A

Line connecting porion and orbitale.

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15
Q

What is the Sella-Nasion line?

A

Line from the Sella to nasion. Represents anterior cranial base.

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16
Q

What is the nasion perpendicular?

A

A line perpendicular from the Frankfort horizontal from the nasion.

17
Q

What is the N-A line?

A

A line from nasion through point A.

18
Q

What is the N-B line?

A

Line from nasion to point B.

19
Q

What is the SNA angle?

A

Inferior posterior angle formed by intersection of lines SN and NA is measured.

20
Q

What is the SNB angle?

A

Interior posterior angle formed by intersection of lines SN an NB.

21
Q

What is the ANB angle and how is it determined?

A

Difference between angles SNA and SNB. It is NOT determined by direct measurement!!

22
Q

What is the mandibular plane?

A

Line from Gonion to Gnathion.

23
Q

What is Y-axis?

A

A line connecting points sella and gnathion

24
Q

What is the interincisal angle?

A

Internal angle between line through long axis of mandibular and maxillary incisor.

25
Q

What is the occlusal plane?

A

Line representing plane of level of occlusion of posterior teeth.

26
Q

Nasolabial angle?

A

Anterior inferior angle formed by intersection of a line tangent to columella of nose and line drawn from subnasale to mucocutaneous border of the upper lip.

27
Q

What is the S-line?

A

Line connecting midpoint of columella of nose to soft tissue pogonion.

28
Q

What is E-line?

A

a line tangent to chin and nose for assessment of lip fullness.

29
Q

What is sassouni analysis?

A

Uses 5 horizontal planes to determine vertical relationship of dentofacial components.

30
Q

What is steiner analysis?

A

Uses SN line as a reference plane to relate Skeletal, dental, and soft tissue to a norm.

31
Q

What is Wits analysis?

A

Anterior posterior relationship of skeletal bases.

32
Q

What is template analysis?

A

Direct comparison of patient with template that were created using data.

33
Q

What is counterpart analysis?

A

Facial harmony can still be maintained if distinct numbers are “off” together.

34
Q

What is McNamara analysis?

A

Lengths of midface, mandible, and lower face.

DMD 6375 Ortho (10 decks)

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