Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BDS 4: Orthodontics > Orthodontic Classification, Terminology and IOTN > Flashcards

Orthodontic Classification, Terminology and IOTN Flashcards

1
Q

What questions in family history are specific to an ortho patient?

A

Does the family have any similar dental problems?

  • Eg) Missing teeth or Skeletal III

Previous history of orthodontic treatment in the family?

  • Shows attitudes and compliance towards ortho
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are some questions about past dental history you may ask an orthodontic patient? (3)

A
  1. Have they had any treatment in the past such as extractions
  2. Have they had any past trauma
  3. Any digit sucking habits
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Define A-P Skeletal Patterns:

  • I
  • II
  • III
A

I = Normal relationship

II = Mandible relatively retrusive (behind upper jaw)

III = Mandible relatively protrusive (infront of upper jaw)

(Class III can appear to look completely flat from chin to top of lip)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Name these two lines of the image

A

Going across - Frankfurt plane

Going down - Zero Meridian line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the 3 components of a skeletal relationship that we need to assess?

A

Anteroposterior (A-P)

Vertical

Transverse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Assess these patients Frankfort Mandibular Planes Angle (FMPA)

A
  1. High angle (Lines cross in front of the occiput)
  2. Average angle (Lines cross at occiput)
  3. Low angle (Lines cross behind occiput)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

When assessing the lips, if they are deemed incompetent what does this mean?

A

Lips do not meet at rest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

At rest when you lift the patient’s upper lip where should the lower lip cover until?

A

Cover lower third of upper incisior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Describe the lip morphology of these 3 patients

A
  1. Normal Lips
  2. Thin Lips
  3. Full Lips
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How can a skeletal II relation in a patient lead to lip incompetence?

A

The mandible is so far back in a patient that the lips meeting at rest causes to much strain on the patient

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the line in this picture?

A

Ricket’s E-Line

This can help show if a patients lips are protrusive or retrusive of this line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What does this image display?

A

Incisal Display

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the 3 components of a dental arch assessment?

A
  1. Alignment of teeth (any rotations)
  2. Spaces or Crowding
  3. The inclination of the teeth
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the 3 ways teeth can be inclined?

A

Normal

Proclined

Retroclined

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

When giving a measurement of crowding in mm’s what are you refering to?

A

How much space is there missing for all the teeth to be in line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How many mm’s is considered

  1. Mild crowding
  2. Moderate crowding
  3. Severe crowding
A
  1. <4mm
  2. 4-8mm
  3. >8mm
17
Q

How do you classify spacing in your notes?

A

Spacing can be either generalised or localised

18
Q

Describe a normal inclination of incisors

A

The crown of the tooth is more buccal (anterior) than the root

19
Q

Describe what you can see in this image clinically

A

Proclined incisor

20
Q

Describe what you can see in this image clinically

A

Retroclined incisor

21
Q

Describe the different classes of incisor relationships based on the relation between lower incisors to palatal aspect of upper incisors

  1. Class I
  2. Class II
  3. Class III
A
  1. Occlude at cingulum plateua
  2. Occlude posteriorly to cingulum plateua
  3. Occlude anteriorly to cingulum plateua
22
Q

What type of incisor relationship is this?

A

Class I

23
Q

What type of incisor relationship is this?

A

Class II division 1:

Incisal edges of the mandibular incisors occlude palatal to the cingulum plateau of the upper incisors. The maxillary incisors are proclined. There is usually an increased overjet.

24
Q

What type of incisor relationship is this?

A

Class II division 2:

The incisal edges of the mandibular incisors occlude palatal to the cingulum plateau of the upper incisors. The upper incisors are retroclined.

25
Q

What type of incisor relationship is this?

A

Class III:

The incisal edge of the mandibular incisors occlude anterior to the cingulum plateau of the upper incisors.

26
Q

What is overjet?

A

Horizontal distance between incisal edge of upper incisors and labial face of lower incisors

27
Q

What is overbite?

A

Vertical overlap of lower incisors by upper incisors

28
Q

What is the red line showing?

A

Overjet

29
Q

What is the red line showing?

A

Overbite

30
Q

Describe where you would see the upper incisors overlap the lower inscisors for

  1. A normal overbite
  2. A reduced overbite
  3. A increased overbite
A
  1. Normal: in middle 1/3rd of lower incisor
  2. Reduced: in incisal 1/3rd
  3. Increased: in gingival 1/3rd
31
Q

Describe:

  1. A class I molar relationship
  2. A class II molar relationship
  3. A class III molar relationship
A
  1. Class I: Mesio-buccal cusp of maxillary first molar occludes in the mid-buccal groove of the mandibular first molar
  2. Class II: Maxillary first molar occludes mesial to class I position
  3. Class III: Maxillary first molar occludes distal to class I position
32
Q

Describe clinically what you see

A

Class I molar relationship

33
Q

Describe clinically what you see

A

Class II molar relationship

34
Q

Describe clinically what you see

A

Class III molar relationship

35
Q

In order to see if a patient can receive orthodontic treatment they must be judged againts the dental health component using the abreviation MOCDO

What does MOCDO standfor

A
  • Missing teeth (impacted teeth)
  • Overjet (>+6mm;>-3.5mm)
  • Crossbites (displacements >2mm)
  • Displacement of contact points (>4mm)
  • Overbite with trauma
36
Q

What are the two components needed for the Index of Orthodontic Treatment Need (IOTN)?

A

Dental Health Compnent

Aestethic Component

BDS 4: Orthodontics (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions