Week 2 Clear Aligners

Question 1

Advantages of invisalign?

Answer 1

Esthetics
Hygiene
Comfort
Tooth movements (intrusion)

Question 2

Limitations of invisalign?

Answer 2

not good for tooth movements: Translation, Rotation, Extrusion

Speed? =0.25 mm/aligner.. so if you change twice in a month -> 0.5mm movement

Question 3

What do you need to submit to the company to process invisaling?

Answer 3

PVS impressions (or an intra-oral digital scan)

Extra and intra-oral photographs

Prescription form

Question 4

You no longer need to submit _____ to process invisalign?

Answer 4

panoramic radiograph

bite registration

Question 5

Why do you submit both upper and lower impressions even if you are treating one arch?

Answer 5

To avoid any unpleasant hyperocclusions or collisions between the teeth.

Question 6

True or False?

PVS impression cannot be adjusted with acrylic bur or heat source

Answer 6

False

It can be adjusted with acrylic bur or heat source

Question 7

Ture or False?

Only plastic trays can be used to do PVS impressions not metal trays

Answer 7

True

Question 8

True or False?

Trays cannot be modified (you cannot heat or cut them)

Answer 8

False

you can heat and cut them to modify them

Question 9

True or False?

You have to make sure the tray reaches distal to the terminal molar

Answer 9

True

Question 10

True or False?

You have to cover the palate to do the upper impression

Answer 10

False

You do not have to cover the palate

Question 11

True or false?

Seat impression in patients mouth fully without incisal edges hitting the tray

Answer 11

True

Question 12

What is the key to take the impressions?

Answer 12

to vertically seat the impression evenly, without tilting

seat slowly to allow air to escape

Question 13

What is the intraoral scanner?

Answer 13

now bypasses the PVS impression stage by just scanning the patient’s teeth

Question 14

Invisalign has how many stages?

Answer 14

Max of 10 stages

Question 15

What are attachments?

Answer 15

composite buttons placed on certain teeth to facilitate movement of those teeth

Question 16

True or False?

You can use invisalign to optimize spacing for your restorative treatment plan

Answer 16

True

Question 17

What is ClinCheck?

Answer 17

Animation, they have taken either your digital teeth and show how it is going to look at the end with invisalign treatment.

Question 18

With Invisalign express you can get up to..

Answer 18

Max extrusion: 0.5 mm
Max IPR: 2mm per arch
Max posterior intrusion of 0.5mm 
No Sagittal (A/P) corrections 
Less than 2 mm movement 
1mm midline correction with IPR

Question 19

Invisalign full vs express

Answer 19

With invisalign full,

you can correct crowding and spacing upto 5mm

Correct up to 4mm of overjet

Question 20

True or False?

The amount of force determines the amount of distortion

Answer 20

True

The force is with you!!

Question 21

True or False?

Attachments does not help direct the forces

Answer 21

False

Attachments does help direct the forces

Question 22

Generally, what kind of action is the aligners doing?

Answer 22

Mostly Pushing (rather than pulling)

Question 23

What is Invisalign teen?

Answer 23

Almost like full but..

It has compliance indicator (fading tabs), replacement trays

Question 24

What is invisalign assist?

Answer 24

more check points..