EFDA Orthodontic Procedures & Appliances

Question 1

What is the primary purpose of placing orthodontic separators (spacers) before banding?

Accepted Answer

To create space between teeth for band placement

Answer

Separators are placed 3–7 days before banding to push adjacent teeth apart, creating enough interproximal space to seat orthodontic bands.

Question 2

Which instrument is primarily used to fully seat orthodontic bands onto molar teeth?

Accepted Answer

Band pusher and bite stick

Answer

A band pusher seats the band below the contact area, and the patient bites on a bite stick to fully drive the band to its final position on the tooth.

Question 3

Which cement is most commonly used for cementation of orthodontic bands?

Accepted Answer

Glass ionomer cement

Answer

Glass ionomer cement is preferred for orthodontic band cementation because it bonds chemically to enamel and releases fluoride, helping prevent decalcification under bands.

Question 4

What is the primary function of an arch wire in a fixed orthodontic appliance?

Accepted Answer

To apply forces that guide and move teeth along a prescribed path

Answer

Arch wires transmit forces through brackets and bands, directing tooth movement to correct malalignment and malocclusion along the treatment plan.

Question 5

Which type of orthodontic attachment is bonded directly to the facial surface of a tooth using dental adhesive?

Accepted Answer

Direct-bonded bracket

Answer

Direct-bonded brackets are attached to the enamel surface with adhesive resin rather than being cemented around the entire tooth like bands, allowing precise bracket placement.

EFDA - Expanded Function Dental Assistant Certification Practice Test

EFDA - Expanded Function Dental Assistant Certification Practice Test

EFDA Orthodontic Procedures & Appliances