Removable Appliances

Question 1

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

Answer 1

Removable appliances

Question 2

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

Answer 2

Mixed dentition
Permanent dentition

Question 3

Classification of remo app

Answer 3

• active
  
  • mechanical appliances
  • functional app
• passive
  
  • retainers
  • space maintainers

Question 4

produce tooth movement and growth modification

Answer 4

Active

Question 5

carry some active components which are activated to exert active forces

Answer 5

Mechanical app

Question 6

work by modifying muscle forces and exerting intermaxillary action

Answer 6

Functional app

Question 7

Examples of active remo

Answer 7

Andersen appliance
frankel appliance
bionator

Question 8

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

Answer 8

Passive

Question 9

Example of passive remo

Answer 9

space maintainers
retainers

Question 10

What is tipping movements?

Answer 10

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

Question 11

What is movement of block of teeth?

Answer 11

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

Question 12

Indication of remo app

Answer 12

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

Question 13

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

Answer 13

Advantages

Question 14

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

Answer 14

Dis advantages

Question 15

Four COMPONENTS need to be considered for every RA:

Answer 15

1. Retentive components
2. active components
3. baseplate
4. anchorage

Question 16

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

Answer 16

Retentive components

Question 17

The effectiveness of the active components depend on …

Answer 17

Retention of the appliance

Question 18

Good fixation will help patient compliance, ___ and __ __

Answer 18

Anchorage and tooth movement

Question 19

Two types of retentive components

Answer 19

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

Question 20

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

Answer 20

Labial arch

Question 21

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

Answer 21

Clasp

Question 22

3 types of clasp

Answer 22

adams clasp
C-clasp
ball end clasp

Question 23

Active components (3)

Answer 23

Springs
Simple spring
Compound spring

Question 24

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

Answer 24

Spring

Question 25

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

Answer 25

Z-springs

Question 26

Z spring indications

Answer 26

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

Question 27

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

Answer 27

Finger spring

Question 28

Indications of the finger spring

Answer 28

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

Question 29

Z pring is a ___ spring

Answer 29

A simple spring

Question 30

Finger spring is a ___ spring

Answer 30

Compound spring

Question 31

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

Answer 31

Base plate

Question 32

Two types of base plate

Answer 32

Passive active

Question 33

Base plate type when is used as a major connector

Answer 33

Passive

Question 34

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

Answer 34

Active

Question 35

Two key factors for a RA success

Answer 35

Patient selection Appropriate appliance design

Question 36

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.

Answer 36

fixed treatment

Question 37

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

Answer 37

interceptive

Question 38

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

Answer 38

No omite que el px No use ortodoncia

Question 39

appliance design has a key role in success:

Answer 39

- 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).

Question 40

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

Answer 40

> **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.**