Space Anlysis Flashcards

1
Q

What is Space Analysis in Primary dentition?
* The purpose of

A

mixed dentition analysis (MDA) is to
calculate the differences between the amount of the dental
arch space available and that required for accommodating the
permanent teeth for planning either preventive or
interceptive approach

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

Lee-way Space
(2)

A
  • The space occupied by the primary canines and
    molars is greater than that required for the
    corresponding permanent teeth, the canine and the
    two premolars.
  • This size difference of the primary and
    permanent teeth is known as the “Leeway
    Space”.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Why Space Analysis
in Primary dentition is important?
* The available space in the arch can be:

A

equal, greater or smaller
than the unerupted teeth.

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

This becomes fundamental in determining the treatment plan that
might involve:
(5)

A
  • Extractions.
  • Eruption guidance.
  • Space maintenance.
  • Space gain.
  • Simple monitoring.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Options for Space Analysis
in Primary dentition?
* The methods employed for MDA can be grouped into three categories:
(3)

A
  • Use regression equations
  • Use radiographs
  • combination of both
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Among the different MDA methods reported in the literature, those
based on the regression equations are the most widely used.
(2)

A
  • Moyers’ probability tables
  • Tanaka and Johnston (T/J) equations.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The major drawback of these analyses is applicability only after the

A

eruption of mandibular permanent incisors.

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

Tanaka and Johnston Analysis
(2)

A
  • Tanaka and Johnston analysis is a
    mixed dentition analysis which
    allows one to estimate the space
    available in an arch for the
    permanent teeth to erupt.
  • All you need to do is to measuring
    the MD width of all lower incisors
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Boston University Approach
(2)

A
  • The original approach proposed
    by Gianelly is as follows:
    3+4+5 = 2D + C
    (lower)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Space analysis in permanent dentition
* It determines the difference between

A

space available and
space required for alignment of permanent teeth

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

How to perform this permanent dentition analysis?
(3)

A
  • Measure the mesio-distal width of each tooth mesial to the first
    permanent molar.
  • The total sum of the width corresponds to the necessary space
    required.
  • Compare these two numbers together. (+, =, -)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Space analysis in permanent dentition
(5)

A
  • Visualization
  • Localized
  • Arch perimeter
  • Segmental arch
    analysis
  • Digital 3D scanning
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Visualization
(2)

A
  • Nothing is more important than clinical examination.
  • Assessing both arches for overall evaluation of the teeth and their
    alignments.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Localized
* Try to figure out where the
problem is.
(2)

A
  • Anterior.
  • Posterior.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Arch perimeter

A
  • Always compare each arch with the ideal arch in your mind.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Arch Circumference

A
  • When you are dealing with crowded arch, accurate assessment of the
    arch circumference is crucial.
17
Q

Arch perimeter
* One on the most accurate devices to
masseur tooth mass (M-D size) is a

A

digital
caliper.

18
Q

Arch perimeter
* — can be used too, with less accuracy and more
human error.

A

Manual caliper

19
Q

Segmental arch analysis
* For each side:
(3)

A
  1. Measure M-D width of every single tooth.
  2. Measure mesial of 1st molar to distal of
    lateral incisor.
  3. Measure distal of lateral incisor to mid-
    line
20
Q

Digital 3D scanner
(3)

A
  • Using digital devices to measure the width of each tooth by plotting
    mesial and distal contact points of each tooth.
  • M-D contact points of each tooth can be plotted and measured
    on a digital cast.
  • M-D contact points of each tooth can be plotted and measured on a
    digital scanned of the arch too