Chapter 60 Quizs

What is class I occlusion?

• It is normal occlusion.

• It is mesioclusion.

• It occurs when the mesiobuccal cusp of the maxillary first molar occludes in the interdental space between the mandibular second premolar and the mesial cusp of the mandibular first molar.

• It occurs when the mesiobuccal cusp of the maxillary first molar occludes in the interdental space between the distal cusp of the mandibular first permanent molar and the mesial cusp of the mandibular second permanent molar.

During the frontal evaluation of facial esthetics, why is the face examined?

• To determine whether the jaws are proportionately positioned

• To evaluate lip protrusion

• To examine for bilateral symmetry

Before placement of orthodontic ______, separators may be necessary.

• arch wires

• bands

• bonded brackets

• ligatures

During cementation of bands, where is the cement placed?

• Into the tubes

• On the tooth

• On the outer surface of the band

• On the inner surface of the band

The function of the ____ is to apply force to either move the teeth or hold them in the desired positions.

• buccal tubes

• bracket

When taking photographs, the full direct view includes what?

• Extraoral frontal view, with the lips in a relaxed position

• Intraoral view, with all teeth in occlusion

• Extraoral profile view of the patient’s right side, with the lips in a relaxed position

• Intraoral right buccal view, with the distal of the canine to the distal of the last molar

A cross-bite refers to which condition?

• There are no posterior teeth.

• There are spaces between teeth in the same arch.

• A tooth is not properly aligning with its opposing tooth.

• The teeth contact only during mastication.

Which type of arch wire is used to position the crown and root of the teeth during the initial stages of treatment?

• Round

• Square

• Rectangular

• Elastic chain ties

Which radiograph is most commonly exposed on an orthodontic patient?

• Full-mouth survey

• Panoramic projection

• Cephalometric projection

• Bitewing images

Which instrument is used in the placement of elastomeric ligature ties?

• Locking hemostat

• Pigtail explorer

• Scaler

• Ligature-tying pliers