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Ortodoncia > Removable Appliances > Flashcards

Removable Appliances Flashcards

1
Q

Their mechanical properties result in simple tipping movements of teeth, therefore multiple simultaneous tooth movements with apical control are not possible

A

Removable appliances

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2
Q

Remo app are usually only indicated for specific interventions in the ___ ___ , and the appliance choice in specific cases of ___ __

A

Mixed dentition
Permanent dentition

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3
Q

Classification of remo app

A
  • active
    • mechanical appliances
    • functional app
  • passive
    • retainers
    • space maintainers
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4
Q

produce tooth movement and growth modification

A

Active

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5
Q

carry some active components which are activated to exert active forces

A

Mechanical app

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6
Q

work by modifying muscle forces and exerting intermaxillary action

A

Functional app

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7
Q

Examples of active remo

A

Andersen appliance
frankel appliance
bionator

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8
Q

appliances remain passive in the mouth and they don’t exert active pressure

A

Passive

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9
Q

Example of passive remo

A

space maintainers
retainers

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10
Q

What is tipping movements?

A

are produced when a single force is applied against the crown of the tooth

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11
Q

What is movement of block of teeth?

A

Influencing the position of the opposite teeth can be achieved by the use of:
flat anterior bite plane: which frees the occlusion of the lower incisor being useful in the overbite reduction

Connected by a baseplate

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12
Q

Indication of remo app

A

provides a useful means of *extra oral force** to a teeth segment or an entire arch to help achieve Intrusion or distal movement.

Also employed for arch expansion which is another example of their usefulness in moving blocks of teeth.

They are use in a passive role as space maintainers and also as retainers appliances

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13
Q

can be removed for tooth brushing
palatal coverage increases anchorage
easy to adjust
less risk of iatrogenic damage (ex. Root restoration) than with fixed appliances
Useful as a passive retainer.
Useful as a passive space maintainer.
Can be use to transmit forces to blocks teeth

A

Advantages

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14
Q

Appliance can be left out.
Only tipping movements are possible.
Good techniclan required.
Affects speech.
Intermaxillary traction is not easy.
Lower RA are difficult to tolerate.
Inefficient for multiple tooth of movement

A

Dis advantages

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15
Q

Four COMPONENTS need to be considered for every RA:

A
  1. Retentive components
  2. active components
  3. baseplate
  4. anchorage
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16
Q

These components help to retain the appliance in place and resist displacement.

A

Retentive components

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17
Q

The effectiveness of the active components depend on …

A

Retention of the appliance

18
Q

Good fixation will help patient compliance, ___ and __ __

A

Anchorage and tooth movement

19
Q

Two types of retentive components

A

Labial arch
Clasps
- addams clasp
- c-clasp
- ball and clasp

20
Q

used for two retention purposes:
as a component of the Hawley retainer
Can also bring a minor overjet reduction

A

Labial arch

21
Q

are placed between the maximum circumference of the neck of the tooth and they provide excellent retention should not apply active force and no interference with occlusion

A

Clasp

22
Q

3 types of clasp

A

adams clasp
C-clasp
ball end clasp

23
Q

Active components (3)

A

Springs
Simple spring
Compound spring

24
Q

apply forces to the teeth, so that they can bring the desired tooth movement

A

Spring

25
Q

consists of 2 helix of small diameter can be made for 1 or more incisors
The spring is placed perpendicular to the palatal surface of the tooth with a long retentive arm

A

Z-springs

26
Q

Z spring indications

A

to move one or more teeth in the same direction,

ex: the pro-inclination of 2 or more upper incisors for the correction of anterior tooth cross bite

27
Q

the helix is placed opposite to the direction of the intended tooth movement

it should also be placed along the long axis of the tooth to be moved, perpendicular to the direction of tooth movement

A

Finger spring

28
Q

Indications of the finger spring

A

medio-distal mov of teeth, anterior closure of anterior diastemas

29
Q

Z pring is a ___ spring

A

A simple spring

30
Q

Finger spring is a ___ spring

A

Compound spring

31
Q

it forms the major part of removable appliance
it acts as a major connector that connects the other individual components and it also distributes the reaction forces to the anchors areas

A

Base plate

32
Q

Two types of base plate

A

Passive active

33
Q

Base plate type
when is used as a major connector

A

Passive

34
Q

Base plate type
by modifying as an anterior or posterior bite plane
**se pone mayor cantidad de acrílico

A

Active

35
Q

Two key factors for a RA success

A

Patient selection
Appropriate appliance design

36
Q

Sometimes a removable intra-oral appliance can solve a dental problem in a shorter period of time compared to __ __, and this has also been repeatedly seen in molar distalization.

A

fixed treatment

37
Q

From the __ perspective, these appliances can prevent or alleviate crowding of the permanent Incisors.

A

interceptive

38
Q

The removable appliances are not considered as alternative method if a patient needs comprehensive orthodontic appliance

A

No omite que el px No use ortodoncia

39
Q

appliance design has a key role in success:

A
  • the location and type of clasp (for better retention and no tissue irritation).
  • The location of the springs (for maximum range of activation) and their direction (for highest rate of activation).
40
Q

There are several important points to be considered when using a removable appliance:

A

> Oral hygiene maintenance is less complicated for patients.
It shortens the fixed orthodontic treatment when it is used in the preliminary stage of the treatment plan.
As an Interceptive method, the appliance may be recommended for those with an increased overjet (protruded upper anterior teeth) in the middle mixed dentition age.
It has a lower relapse rate during the retention period compared to fixed appliances.
In other cases the outcome of the treatment should be maintained with subsequent fixed treatment.

Ortodoncia (14 decks)

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