Exam II Material Dr. Pruzansky Appliances 1

Question 1

What appliance am I describing? Maxillary bilateral space maintainer…Can also be used for anchorage…Can have hygiene problems with plaque and food getting under the acrylic

Answer 1

Nance appliance

Question 2

What appliance am I describing? Maxillary bilateral space maintainer….The arch is narrower as you move mesial, so by maintaining the arch width you prevent mesial movement – in theory….Can also be used for anchorage…Can be manufactured chair side with a kit…Can be adjusted to rotate molars

Answer 2

TransPalatal Arch (TPA)

Question 3

Palatal Expanders: Best when used prior to end of ________….Must hold expansion for ___ months to allow bone to fill in

Answer 3

pooberty..6mo

Question 4

What are the two types of palatal expanders? Which one has less tipping of the buccal tooth segments?

Answer 4

haas and hyrax…haas (in theory)

Question 5

What are the 2 indications for a BONDED RPE (rapid palatal expander)?

Answer 5

mixed dentition and open bite tendency

Question 6

What are the two devises used for dental and not skeletal expansion?

Answer 6

W arch and Quadhelx

Question 7

What are the three examples of DISTALIZERS (for saggital correction)??

Answer 7

Pendulum, TAD, Lip Bumper

Question 8

What is the nickname for a Pendulum? What is its main mode of action?

Answer 8

T-Rex…distalizes maxillary molars by anchoring off palate

Question 9

What is the ONLY tissue borne functional appliance?

Answer 9

FRANKEL (buccal vestibule is main support)

Question 10

What are the three TOOTH borne, REMOVABLE functional appliances?

Answer 10

Activator, Bionator, Twin Block

Question 11

What are the three TOOTH borne, FIXED functional appliances?

Answer 11

MARA, Herbst, and Forsus

Question 12

Which removable functional appliance advances the mandible?

Answer 12

Activator Advances

Question 13

What is the VERY COMMON class II correction fixed appliance that redirects remaining mandibular growth more horizontal?

Answer 13

Herbst Appliance

Question 14

What do long term studies about the Herbst appliance show that it DOES NOT do??

Answer 14

it does NOT increase the total length of the mandible

Question 15

The Herbst appliance will _______ the mandibular incisors

Answer 15

procline

Question 16

Which three appliances procline the mandibular incisors?

Answer 16

MARA and Herbst and FORSUS

Question 17

Does the Herbst appliance require fixed braces?

Answer 17

NO

Question 18

If the Herbst appliance doesnt require fixed braces, then what appliance DOES? (they BOTH treat class II and procline the mand incisors)

Answer 18

FORSUS appliance

Question 19

HEADGEAR: Used for ________ (maintain space) and _______ (create space)

Answer 19

anchorage…traction

Question 20

When describing bracket dimensions…the first number is the width ______-_______ and the second number is the _______ (0.018x0.025”)

Answer 20

occluso-gingival….depth

Question 21

What are the 2 types of cement used with ortho bands? What is NOT needed?

Answer 21

1. GI cement-Fluoride releasing, can adhere to CALCIUM in the tooth 2.Zinc Phosphate cement-DOES NOT adhere to tooth structure, can be a pulp irritant….ETCH is NOT required!

Question 22

Which ortho cement releases Fluoride and can adhere to the CALCIUM in the tooth?

Answer 22

GI cement

Question 23

Which ortho cement does NOT adhere to the tooth structure and can be a PULP IRRITANT??

Answer 23

Zinc Phosphate

Question 24

The ideal properties of ortho arch wires are high _______, _______, and _______ and LOW _______

Answer 24

high strength, working range, and formability…LOW stiffness

Question 25

What is the most common, most flexible first wire usually used?

Answer 25

Nickel-Titanium (Ni-Ti)

Question 26

Ni-Ti is resistant to _________

Answer 26

permanent deformation

Question 27

Ni-Ti has a LOW _______

Answer 27

modulus of elasticity

Question 28

Interesting…counter-intuitive: Super-elastic NiTi are ______ at room temp and become more _____ at higher temps

Answer 28

flexible…more rigid

Question 29

Which arch wire type is in the middle of NiTi and Stainless Steel?

Answer 29

Beta-Titanium

Question 30

Which arch wire has the HIGHEST modulus of elasticity AND the lowest springback?

Answer 30

Stainless Steel

Question 31

What are the (8) functional appliances we discussed?

Answer 31

1.Frankel 2.Bionator 3.Twin block 4.Herbst 5.Activator 6.MARA 7.Herbst 8.Forsus

Question 32

A maxillary fixed bilateral space maintainer is also known as a:

Answer 32

Nance appliance

Question 33

What are the three materials are arch wires commonly made of?

Answer 33

Nickel-Titainium, Beta-Titianium, and Stainless Steel

Question 34

***What appliance is the most widely used by orthodontists?

Answer 34

edgewise

Question 35

All of the following are advantages of the indirect method of bonding brackets over the direct method except (choose one): A. Reduced chair-side time B. More precise location of brackets C. Controlled thickness of resin D. Less technique sensitive E. Easier clean-up F. Better visualization in lab

Answer 35

EXCEPT LESS TECHNIQUE SENSATIVE

Question 36

A headgear appliance is used for: A. Anchorage

B. Traction C. Both anchorage and traction D. Neither anchorage nor traction

Answer 36

C. both anchorage and traction

Question 37

Prior to direct bonding, ___________ is used as an etching agent.

Answer 37

35% phosphoric acid

Question 38

Prior to placing bands, __________ is used as an etching agent.

Answer 38

NOTHING