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AU14 Orthodontics > Orthodontic Appliances > Flashcards

Orthodontic Appliances Flashcards

1
Q

What are the two kinds of orthodontic appliances

A

fixed

removable

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2
Q

What are four advantages of removable appliances

A

removable
more hygienic than fixed appliances
may be more esthetic
easier for certain growth modification treatment than fixed appliances

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3
Q

What are three disadvantages of removable appliances

A

relying on patient compliance
less precise force control than fixed appliances
involves lab work

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4
Q

What are the three primary uses of removable appliances

A

growth modification
minor tooth movements
retention

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5
Q

This removable appliance stimulates mandibular growth and controls tooth eruption

A

bionator

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6
Q

This removable appliance stimulates mandibular growth, can include an expander, and can add headgears

A

twin block

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7
Q

This removable appliance is completely tissue borne, includes buccal shields or lip pads to reduce cheek and lip pressure for expansion, it stimulates mandibular growth (lingual pads)

A

Frankle appliance

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8
Q

What are two varieties of headgears

A

cervical pull

high pull

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9
Q

This is when the face bow is connected to soldered hooks on the arch wire; other head gears are connected to the molar tubes

A

Combi pull and J Hook

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10
Q

This appliance is used for preadolescent patients exhibiting maxillary deficieny

A

face mask and reverse pull headgear

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11
Q

In some removable appliances, the force for active tooth movement is provided by what

A

finger springs

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12
Q

These three things provide anchor and appliance retention in removable appliances

A

acrylic
labial bow
molar clasps

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13
Q

What is a bite plate on the anterior teeth suppose to do

A

decrease overbite

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14
Q

What is a bite plate on the posterior suppose to do

A

increase overbite

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15
Q

This type of removable retainer has a labial bow, clasps or rests on the posterior teeth, and acrylics

A

Hawley Retainer

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16
Q

These removable retainers are used for both retention and minor tooth movement

A

spring retainers

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17
Q

These removable appliances are used for minor tooth movement and retention, it is fabricated on set-up models to which desired (minor) tooth movement has been included

A

tooth positioners

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18
Q

Contemporary orthodontic fixed appliances are primarily based upon this mans designs from the 1800s

A

Edward Angle

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19
Q

The modern edgewise appliances have what two features

A

horizontal slots

rectangular arch wires for torque control

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20
Q

This is modified based upon Angle’s ribbon arch, added auxiliary springs for root control, not commonly used anymore

A

the Begg appliance

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21
Q

Compared to the edgewise, the Begg appliance has what major distinction

A

The sire to bracket contact is very small and friction is minimal, the teeth can be moved quickly, but its hard for root control

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22
Q

What are the two types of brackets in the modern edgewise appliance

A

twin brackets

single brackets with wings

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23
Q

What are the two size brackets used today

A

0.018 and 0.022 inch slots

24
Q

In the 1980a pre-adjusted edgewise appliance was developed a refining manufacturing process with “built-in” adjustments specific for each tooth that avoided what

A

avoided repeating bends to compensate for the difference among teeth, which are required for the standard edgewise appliance

25
Q

Who studied normal occlusion and individual tooth positions, then developed the “ideal” prescriptions (angle and position) for each tooth

A

Larry Andrews, an OSU grad

26
Q

Elements of the “ideal” tooth prescriptions re fabricated into the appliance, which substantially minimizes what

A

chair-side active “wire manipulation”

27
Q

What is the pre-adjusted edgewise also known as

A

“straight wire” technique

28
Q

Wire bending is still necessary, why

A

especially during the detailing and finishing phase, as the ideal prescriptions may not be exactly ideal for individual patients/teeth

29
Q

By varying these two things, differences of a tooth horizontal position are compensated for

A

bracket base thickness

molar tube profile

30
Q

In the standard edgewise, these are needed to compensate for horizontal position variations

A

1st order bends

31
Q

In the pre-adjusted edgewise, what are the steps you would take to add the prescriptions of the horizontal plane

A

make the backer base of the upper lateral incisors, lower incisors thicker
while the molar tube profile shorter then adjust bracket slots

32
Q

This is affected by varying bracket slot tipping, the differences of tooth long axis angulation are compensated for

A

mesial-distal angulation

33
Q

With the standard edgewise what are needed to change the mesial-distal angulation

A

2nd order bends

34
Q

In the pre-adjusted edgewise, what are the steps you would take to add the prescriptions of the mesial-distal angulation

A

align the vertical slot with the root long axis, if the mesial-distal angulation of the tooth needs change, the straight wire will deflected once engaged to that tooth

35
Q

This is affected by varying the slot-bracket angle or differentially changing bracket base thickness, the differences of tooth labial-lingual angulation are compensating for

A

third order/torque

36
Q

The variation of torque among teeth is compensated for by what

A

changing the brackets (pre-adjusted) or the arch wire (standard)

37
Q

What are four typical components of modern edgewise appliances

A

bands with molar tubes
brackets
archwires
auxiliaries; elastomeric chains, coil springs, lingual arches, etc.

38
Q

What are the three purposes of banding

A

tooth separation
band fitting
band cememtation

39
Q

Make sure the tubes are sealed with what before curing the adhesive

A

wax

40
Q

What are the three different bonding techniques of the brackets

A

direct and indirect bonding
rebonding
debonding

41
Q

The arch wires are tied to brackets by what

A

elastic and stainless steel ties

42
Q

This auxiliary is used for space closure

A

power chains

43
Q

This auxiliary is used for improving occlusion, moving impacted teeth, shift midlines, etc.

A

elastics (rubber bands)

44
Q

This axillary is used in the open state for opening teeth, retracting teeth, etc.
and in the closing state for maintaing spaces

A

coil springs

45
Q

What are the three fixed appliances for class II correction

A

Herbst
MARA
Forsus

46
Q

What are three advantages of fixed appliances for class II correction

A

patient compliance not required
larger dental movement than elastics
Herbst and MARA may potentially have skeletal growth modification effects

47
Q

This fixed appliance can be used for a class II correction

A

Jasper Jumper

48
Q

This fixed appliance can be sued for arch expansion, molar distalization, and incisor proclination

A

lip bumper

49
Q

This expansion appliance is used for palatal expansion; skeletal and dental

A

Hyrax

50
Q

This expansion appliance is for dental only

A

lower arch expander

51
Q

These expansion appliances are preferred for preadolescent and early mixed dentition patients, made of heavy stainless steel, and helices are used for activation and increase the range of tooth movement

A

quad helix with finger spring

W arch

52
Q

These appliances are used for anchorage and space maintenance purposes; heavier than regular archwires

A

transpalatal arch and lingual holding arch

53
Q

This appliance is used for molar distaliztion, bonded to the premolars; TMA wires with helices inserted to molar tubes with anchorage from the palate its use is primarily molar movement with some movement of the anterior teeth as well

A

pendulum appliance

54
Q

This appliance is used for correcting tongue or finger habit, heavy stainless steel wire anchored on the molar

A

habit appliance

55
Q

What are three recent developments of fixed appliances

A

lingual braces
clear ceramic brackets
self-ligating

56
Q

What are four properties of removable appliances

A

mostly produce tooth tipping
no control over root movement
patient compliance required
more hygienic

57
Q

What are four properties of fixed appliances

A

can produce bodily tooth movement and tipping
better control of root movement
less dependent on patient compliance
less hygienic

AU14 Orthodontics (11 decks)

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