Ortho Flashcards

1
Q

When can the RDA use the ultrasonic scaler to remove cement?

A

RDA & cert in ultrasonic scaler

Excess cement & cemented ortho bands

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2
Q

What might you suspect of the teeth are not separated and sulcus is inflamed?

A

Separator slipped into sulcus

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3
Q

Define class 2 and class 3 of intermax elastics?

A

Class 2 elastic extends from max ant to mand post MAND PROTRUSION
Class 3 extends from max post to mand ant MAND RETRUSION

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4
Q

In what direction is a ligature tie twisted?

A

CLOCKWISE

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5
Q

What will occur if a ligature wire is too tight?

A

Break by tension

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6
Q

Brass wires should be inserted w/ what instrument?

A

Howe pliers

Hemostat pliers

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7
Q

Who can adjust head gear?

A

Dentist

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8
Q

What are the hawe’s and jackscrew appliances for?

A

Palatial expansion divider

Used to treat crossbite by widening the max arch at the sutures

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9
Q

How do you remove an elastic separator?

A

W/ a scaler pulling away from ging tissue

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10
Q

What is the appropriate way to insert headgear?

A

One side at a time

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11
Q

Who can remove TP springs and brass wire separators?

A

DA

Direct supervision

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12
Q

How long should the twist be on a ligature tie and in what direction should it be bent?

A

Cut 4-5 mm and tuck under arch wire

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13
Q

In what 2 ways can arch wife’s not be ligated into the ortho brackets?

A

Ligature wires- β€œA ties”

Elastic ligatures- β€œO ties”

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14
Q

What is a hawley retainer?

A

Most common ortho retainer

ONLY DENTIST ADJUSTS IT

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15
Q

What should you do if the arch wire does not seat?

A

Check the end of the arch wire
Look for debri on bracket and tube
Check wire
And tell dentist

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16
Q

On what area is the tooth should the band be placed?

A

Middle 1/3rd of the crown

17
Q

Why might you place foil over the teeth at a banding appt?

A

To isolate the teeth from saliva

18
Q

Why is it important to locate a loose band?

A
A loose band could cause:
Straining
Decalcification 
Caries
Strong odor and tastes 
Plaque build up
19
Q

How is a band removed?

A

Teflon beak of pliers is placed on occ
Other beak on edge of band
Squeeze pliers together and the band is lifted free

20
Q

Who may place separators?

A

DA- ONLY elastics
RDA- ALL TYPES
Both under direct supervision

21
Q

What is the appropriate method for measuring arch width?

A

Use a bow divider to measure the distance from the tip of the cusp of the right cuspid to the tips of the cusp of the left side

22
Q

Define:

Overbite

A

Vert distance b/w max teeth extended over mand ant

23
Q

Define:

Overjet

A

Horizontal distance b/w ant mand and max arches

24
Q

List Angle’s class of malocclusion:

A
Neutroclusion= Class 1 
Distoclusion= Class 2 
Mesioclusion= Class 3
25
Q

What pliers are of choice for the placement of the arch wire into the buccal tube and brackets?

A

Weingart pliers=preferred

Howe= acceptable

26
Q

What arch dominates the pull force of the intermax elastics?

A

Max arch

27
Q

What is the purpose of the intermax elastics?

A

Aid in alignment of the teeth and arches