Removable orthodontic appliances

Question 1

Similar to dentures in construction

Answer 1

in that alginate impressions of both arches + wax bite registration are taken + sent to lab, along with ticket detailing exact design required.

Question 2

The technician

Answer 2

involved in construction is who specialises in ortho devices, as various components used are specific to this dental discipline + not with other protheses

Question 3

Study models + working models

Answer 3

are cast from imps + latter set are used to construct acrylic bases for each appliance, or for just 1 appliance. the additional components that can then be added to the acrylic base are:

Question 4

Adams crib

Answer 4

to retain appliance in mouth, usually fit onto molar or premolar teeth + made of stainless steel

Question 5

Springs

Answer 5

in a variety of designs to move teeth along arch as required

Question 6

Retractors

Answer 6

to push one or several teeth backwards

Question 7

Expansion screws

Answer 7

to move several teeth or each half of upper arch outwards

Question 8

The equipment for monitoring + adjusting:

Answer 8

Adams crib pliers - to adjust all metal springs + retractors as necessary

Question 9

Straight handpick + acrylic trimming bur

Answer 9

to adjust all acrylic areas of appliance as necessary

Question 10

Measuring ruler

Answer 10

to record any measurable tooth movement such as overjet

Question 11

Expansion screw key

Answer 11

to count number of turns applied to screw between visits, to ensure compliance by pt