Removable and Fixed Appliances

Question 1

Class 1 dental crossbite.

Answer 1

When the anterior maxillary teeth are 1 step behind the lowers.

Question 2

When the mandible shifts forward on closure.

Answer 2

Pseudo Class 3

Question 3

Upper anteriors are tipped behind the lowers. Skeletal relationship is normal.

Answer 3

Dental Class 3

Question 4

Maxilla doesn’t grow properly, so upper anteriors are behind the lower anteriors.

Answer 4

Skeletal Class 3

Question 5

Appliance that discludes the posterior teeth to open the bite so that the maloccluded anterior teeth can be pushed forward.

Answer 5

Posterior bite plate.

Question 6

How long after you move the teeth do you keep the patient in a retainer?

Answer 6

6 months

Question 7

What is the ideal ratio of apical base width to dental arch width?

Answer 7

1:1

Question 8

In a correct apical base to dental arch width, describe the tangents of the posterior buccal surfaces.

Answer 8

Parallel to one another.

Question 9

Degree of tooth to bone.

Answer 9

90 degrees

Question 10

When the teeth converge occlusally.

Apical bone base is wider than the arch width.

Answer 10

Dental crossbite

Question 11

Tx for dental crossbite.

Answer 11

Tipping or dental expansion.

Question 12

Teeth diverge occlusally.

Apical bone base is smaller than the width of the dental arch.

Answer 12

Skeletal crossbite.

Question 13

Describe the crossbite that occurs in an edge to edge occlusion.

Answer 13

Lateral functional shift on one side and unilateral crossbite on the other.

Question 14

When an entire tooth is completely buccal to the opposing tooth.

Answer 14

Complete buccal cross-bite

Question 15

When the upper teeth are tipped lingually.

Answer 15

Lingual crossbite

Question 16

When does the maxillary suture close?

Answer 16

Puberty

Question 17

A combo of dental and sutural expansion.

No problem with oral hygiene.

Answer 17

Hyrax Rapid Palate Expander (RPE)

Question 18

1 turn of a palate expander is how many mm?

Answer 18

1/4 of a mm.

So open 1 mm every 4 nights.

Question 19

This type of expansion opens the palate 1 mm every 4 days.

Answer 19

Rapid expansion

Question 20

This type of expansion open the palate 1 mm every 2-4 weeks.

Answer 20

Slow expansion

Question 21

This type of palate expander has maximum rigidity due to acrylic palatal shelf, and causes true sutural expansion.

Answer 21

Haas RPE

Question 22

• An expander that’s REMOVABLE.
• DENTOALVEOLAR EXPANSION.
• SLOW expansion.

Answer 22

Schwarz appliance

Question 23

Dentoalveolar expansion for pedo patients.

Answer 23

Quad helix

Question 24

The skeletal midline of the mandible is shifted laterally in relation to the facial midline in the OCCLUSAL and REST position.

Answer 24

Mandibular Skeletal shift

Question 25

The skeletal midline is shifted laterally in relation to the facial midline ONLY when the teeth are in occlusion.

There is no asymmetry in the rest position.

Answer 25

Mandibular Functional shift.