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Flashcards in 5. Dx and Tx plan Deck (24)
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1
Q

In what dimension can you see if someone has lingual crossbite, buccal crossbite (dentoalveolar) (vertical/transverse/sagital)

A

transverse

2
Q

In what dimension can you see if someone has and open bite or deep bite (vertical/transverse/sagital)

A

Vertical

3
Q

In what dimension can you see if someone has angles class I, II, or III classification (vertical/transverse/sagital)

A

sagital

4
Q

what is a skeletal lingual crossbite and a skeletal buccal crossbite

A
  • Lingual= upper arch is narrower than the lower

- Buccal= Upper arch is wider than the lower

5
Q

What cephalometric points tell you the relationship of the maxilla to the mandible

A

ANB

6
Q

ANB angle

  • Class I
  • Class II
  • Class III
A
  • Class I= 2 degrees
  • Class II= >2 degrees
  • Class III = <2 degrees
7
Q

The S line is drawn from

A

midway of columella of lip to the chin

8
Q

E line is drawn from

A

Tip of nose to chin

9
Q

Distance from the S line to…

  • Upper lip
  • Lower lip
A

Both are 0 mm

10
Q

Distances from E-line to

  • Upper lip
  • Lower lip
A
  • Upper lip= -4 mm

- Lower lip = -2 mm

11
Q

Difference between space required and space available

A

Space required= MD width of all the teeth mesial to the second permanent molars

Space available= Segments of dental arch are divided into straight lines and measured including the first permenant molars

12
Q

When the Patient has a class I skeletal relationship and flared incisors what is the treatment of choice for most cases

A
  • Extract the first PMs

- Expansion is contraindicated

13
Q

When the Patient has a class I skeletal relationship and retruded incisors what is the treatment of choice for most cases

A
  • Expansion

- Extraction is contraindicated

14
Q

What is the difference between orthopedic and orthognathic treatment

A
orthopedic= patient is still growth 
orthognathic= patient is non-growing (adult)
15
Q

Does the headgear move the maxilla or the mandible? And in what direction?

A

Maxilla- moves the maxilla distally

16
Q

Headgear is used for patients with class II or III skeletal deformities

A

II

17
Q

What is the difference between cervical pull headgear and high pull headgear

A
  • Cervical pull= Class II with deep bite

- High pull= Class II with open bite

18
Q

Head gear should be worn for how long each day

A

12-14 hrs

19
Q

Herbst appliance is for patients with class (II/III)

A

II (Class II with retrusive mandibles)

20
Q

Function of the Herbst appliance is to

A

advance the lower jaw

21
Q

Facemask is for patients with class (II/III) skeletal defects

A

III

22
Q

Facemask corrects class III occlusion how

A

pulls the maxilla forward and reduces mandibular growth

23
Q

Facemask is also called

A

reverse pull headgear

24
Q

Facemask should be worn how many hours throughout the day

A

12-14 hrs