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D2 Spring > Ortho - Lecture 10: Cephalometrics > Flashcards

Ortho - Lecture 10: Cephalometrics Flashcards

1
Q

Standardized technique of studying the living skull by means of laterally oriented head radiographs. Allows for quantification of hard and soft tissue
dimensions/relationships and comparison to reference values

A

Cephalometry

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2
Q

Allow us to evaluate dento-facial proportions and clarify the anatomic basis for malocclusion

A

Cephalometric X-Rays

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3
Q

Sagittal and vertical planes

A

Lateral ceph

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4
Q

Transverse and vertical planes

A

PA ceph

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5
Q

Overlay drawing of specific anatomic features on a radiograph to allow superimpostion of structures to detect changes over time

A

Ceph tracing

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6
Q

What are the 5 functional units of the craniofacial complex?

A

Cranium + cranial base
Nasomaxillary complex
Maxilla
Dentoalveolar processes (maxillary + mandibular)
Mandible

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7
Q

Which landmark of the cranium + cranial base?

The posterior end of the anterior cranial base

A

Sella (S)

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8
Q

Which landmark of the cranium + cranial base?

Center of cavity of the sella turcica
Consistent throughout growth

A

Sella (S)

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9
Q

Which landmark of the cranium + cranial base?

Front end of anterior cranial base, located at anterior end of junction btwn nasal and frontal bones

A

Nasion (Na)

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10
Q

Which landmark of the cranium + cranial base?

Lowest point of bony orbit

A

Orbitale (Or)

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11
Q

Which landmark of the cranium + cranial base?

If R + L orbital rims overlap, the lowest point on the averaged outline is used

A

Orbitale (Or)

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12
Q

Which landmark of the cranium + cranial base?

Most superiorly positioned point of external auditory meatus; difficult to identify

A

Porion (Po)

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13
Q

Which landmark of the maxilla + nasomaxillary complex?

Front end of maxilla, at tip of anterior nasal spine

A

Anterior nasal spine (ANS)

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14
Q

Which landmark of the maxilla + nasomaxillary complex?

Associated w/ anterior maxilla, located at inntermost point of the contour of premaxilla btwn ANS and incisor

(junction btwn skeletal maxilla and maxillary dentoalveolar process)

A

A point (A)

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15
Q

Which landmark of the maxilla + nasomaxillary complex?

Posterior end of maxilla, located at tip of posterior spine of the palatal bone, at the junction of hard and soft palates

A

Posterior nasal spine (PNS)

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16
Q

Which landmark of the mandible?

Anterior part of the mandible, located in innermost point on contour of mandible btwn incisor and bony chin

A

B point (B)

17
Q

Which landmark of the mandible?

Most anterior point on contour of chin (front of chin)

A

Pogonion (Pg)

18
Q

Which landmark of the mandible?

Most inferior point on mandibular symphysis (bottom of chin)

A

Mention (Me)

19
Q

Which landmark of the mandible?

Center of inferior contour of chin, halfway btwn Pg and Me

A

Gnathion (Gn)

20
Q

Which landmark of the mandible?

Angle of mandible, located at center of inferior contour of mandibular angle

A

Gonion (Go)

21
Q

Which landmark of the mandible?

Most superior point of condylar head

A

Condylion (Co)

22
Q

Which landmark of the maxillary and mandibular dentoalveolar processes?

Tip of most anteriorly positioned maxillary incisor

A

Upper incisor tip (U1 tip)

23
Q

Which landmark of the maxillary and mandibular dentoalveolar processes?

Apex of most anteriorly positioned maxillary incisor

A

Upper incisor apex (U1 apex)

24
Q

Which landmark of the maxillary and mandibular dentoalveolar processes?

Tip of most anteriorly positioned mandibular incisor

A

Lower incisor tip (L1 tip)

25
Q

Which landmark of the maxillary and mandibular dentoalveolar processes?

Apex of most anteriorly positioned mandibular incisor

A

Lower incisor apex (L1 apex)

26
Q

Which landmark of the maxillary and mandibular dentoalveolar processes?

Bilateral structures - trace molar on L side
Slightly above and behind image of other side

A

Upper 1st molar (U6)
Lower 1st molar (L6)

27
Q

What are the 5 key planes?

A

SN
Frankfort horizontal
Palatal
Occlusal
Mandibular

28
Q

Line connecting Sella (S) to Nasion (Na)

29
Q

Line connecting Porion (Po) to Orbitale (Or)

A

Frankfort Horizontal plane

30
Q

This is a commonly used reference plane and should be parallel to the floor

A

Frankfort Horizontal plane

31
Q

Line connecting ANS and PNS

A

Palatal plane

32
Q

Line intersecting overlapping cusps of 1st molars and incisal overbite

A

Occlusal plane

33
Q

Line connecting Gonion (Go) and Gnathion (Gn)

A

Mandibular

34
Q

Objective of ceph analysis is to establish the relationship of these units in the anteroposterior and vertical planes of space

35
Q

slide 43

D2 Spring (46 decks)

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