47. Elements of fix orthodontic appliances, multiband system.

Question 1

1. What are fixed orthodontic appliances?

Answer 1

Orthodontic appliances that are bonded to teeth and cannot be removed by the patient are termed ‘fixed appliances’.

Used for:
- anchorage,
- correction of some skeletal or jaw discrepancies
- treatment of dental irregularities.

Question 2

2. What are advantages of fixed orthodontic appliances

Answer 2

• Treatment of the complicated malocclusion
• Greater range of movement

Question 3

3. What are disadvantages of fixed orthodontic appliances

Answer 3

• Difficult to clean
• Less esthetic
• More complicated
• Expensive

Question 4

4. What are elements of fixed orthodontic appliances? (Direkt bonding system)

Answer 4

1/ Band
2/ Hook
3/ Archwire
4/ Rubber band
5/ Bracket
6/ Elastic ligature

Question 5

4. Elements of fixed orthodontic appliances
   a/ The role of hook

Answer 5

used for attachment of spring and elastics

Question 6

4. Elements of fixed orthodontic appliances
   b/ The role of Molar bands

Answer 6

For when bonded attachments are not suitable
1/ Separation of adjacent teeth
2/ Sizing and fitting the band to tooth
3/ Cementation
4/ Clean up

Question 7

4. Elements of fixed orthodontic appliances
   c/ The role of arch wires

Answer 7

assist movement of teeth

Question 8

4. Elements of fixed orthodontic appliances
   d/ The role of ligatures

Answer 8

• Metal/elastic rubber
• Orthodontic ligatures are tiny rubber bands that tie the brackets and wires together.
• help to evenly distribute the occlusal forces (the force exerted on opposing teeth when your upper and lower teeth meet together) to straighten your teeth.

Question 9

5. Multiband system
   a/ What is the role of multi band system?

Answer 9

It is usually the 2. part of the orthodontic treatment
the only appliance which can support perfect alignment and body movement (torque, angulation)

Question 10

6. Multiband system
   b/ What are the components of multi band system?

Answer 10

• Rigid connectors called molar tubes and brackets
• arch-wires and other elastic sources
• auxiliaries (everything else needed to get the job done)
• Dot is always on the distogingival wing of the bracket

Question 11

7. Brackets can be made of…

Answer 11

• Stainless steel brackets
• Titan brackets
• Goldbrackets

Question 12

8. What are disadvantages and advantages of ceramic brackets?

Answer 12

Disadvantages:
- expensive
- fragile
- difficult to remove the brackets
- more difficult to apply ligatures

Advantages:
- esthetic

Question 13

9. What are the 3 main steps for placing orthodontic bands?

Answer 13

1/ Separation of adjacent teeth
2/ sizing and fitting the band to the tooth
3/ Cementation and cleanup

Question 14

10 Which materials are used to bind the bracket to the tooth?

Answer 14

1/ Composite
2/ Glassionomer
3/ Glue (Self-cure)

Question 15

11. Fixed orthodontic appliances examples
    a/ Indication of Hyrax

Answer 15

• serious narrowing of the upper arch
• bilateral or unilateral cross bite
• treatment of cleft palate (scar-tissue enlargement)
• hyrax has a sceletal affect (childhood, puberty, 8-14 ages)
• Expansion in serious II. and III. class cases

Question 16

11. Fixed orthodontic appliances examples
    b/ Usage and Effect of Hyrax

Answer 16

1/ Usage
- Hyrax is used in mixed and permanent dentition, while children are growing.
- After the end of the development hyrax can’t be used (alone)

2/ Affect:
* - ripping („breaking”) of the sutura palatina mediana

Question 17

11. Fixed orthodontic appliances examples
    c/ Cases that need to use Hyrax

Answer 17

Case I - narrowing, lack of place
Case II - Gap between the central incisors shows the correct result (shows the sceletal affect)

Question 18

11. Fixed orthodontic appliances examples
    d/ How do we use Hyrax in permanent dentition

Answer 18

Structure in permanent dentition:
- Metal bands on teeth 14,16,24,26
- 6 or 12 mm expanding screw

Question 19

11. Fixed orthodontic appliances examples
    e/ How do we use Hyrax in mixed dentition

Answer 19

Structure in mixed dentition:
- Acrylic splint on the lateral teeth (canines, primary molars)

6 or 12 mm expanding screw

Question 20

11. Fixed orthodontic appliances examples
    f/ Characteristics of Fixed bimaxillary appliances

Answer 20

Mainly used as an early treatment during the period of the intensive growth

• Application in a later phase these appliances have a minimal skeletal and more dentoalveolar effects.
• They intrude the upper molars and protrude the lower incisors