OSCE

Question 1

What is its purpose of Dycal?

Answer 1

▪ Antimicrobial and anti-inflammatory protective base/liner on IPC

Question 2

How is Dycal mixed

Answer 2

▪ On a mixing pad, Dycal + accelerator dots (base and catalyst) → mix until evenly colored (10 seconds)

Question 3

Do we want a thick or thin layer of Dycal? Cover a large area or small Why?

Answer 3

▪ Thin becaue it is weak (avoid cavosurface margins)

Question 4

Should the tooth be moist or dry for Dycal?

Answer 4

Dry

Question 5

Do we light cure Dycal?

Answer 5

No

Question 6

Why is Dycal covered with Vitrebond?

Answer 6

▪ Resists condensation, increases bonding, seals tubules

Question 7

What classification of material is Vitrebond?

Answer 7

▪ Resin modified glass ionomer

Question 8

How do you prepare the tooth for Vitrebond?

Answer 8

▪ Do NOT condition; just put over dycal

Question 9

How do you mix Vitrebond

Answer 9

▪ 1:1 mix on mixing pad, about 15 seconds (1 scoop:1 drop)

Question 10

Do we light cure Vitrebond?

Answer 10

▪ Yes 30 seconds

Question 11

What is TheraCal LC?

Answer 11

TheraCal LC is a bioactive light-cured resin-modified calcium silicate

Question 12

Do we want a thick or thin layer of TheraCal LC? Cover a large area or small Why?

Answer 12

▪ Thin, large

▪ Cover affected dentin over the pulp and healthy dentin

Question 13

How thick and increment can we place for TheraCal LC?

Answer 13

▪ 1 mm thick increments

Question 14

Should the tooth be moist or dry for TheraCal LC?

Answer 14

▪ Moist because this material pulls water from tubules anyhow

Question 15

Do we light Cure for TheraCal LC?

Answer 15

▪ Yes 20 seconds

Question 16

Etchant used for AmalgamBond Plus and how applied

Answer 16

10% citric acid - Dispense 1 or 2 drops of DENTIN ACTIVATOR (A). Apply to exposed dentin for 10 seconds. Wash thoroughly and dry with oil-free, moisture-free air-stream. Can also be used to etch enamel for 30 seconds before water-rinsing.

Question 17

After rinsing etchant for AmalgamBond Plus, how dry do you want the surface?

Answer 17

▪ Frosty but not desiccated

Remove standing moisture

Question 18

After applying the adhesive agent AA for AmalgamBond Plus how long do you dry? (Is the air syringe blasting air to thin or gently blowing to evaporate?)

Answer 18

▪ Gently blow to evaporate

▪ 30 seconds

Question 19

Why do we use HPA for AmalgamBond Plus?

Answer 19

▪ High performance additive

▪ Stronger bonding with this filler

Question 20

What is the ratio of drops of base to catalyst for AmalgamBond Plus?

Answer 20

▪ 3 drops of base to 1 catalyst (think Three rhymes with B)

Question 21

Do you place a thick or thin layer of AmalgamBond Plus? Why?

Answer 21

▪ Thin, don’t want any pooling that would inhibit micr-mechanical interlocking of the fingers of amalgam

Question 22

How does the condensation technique differ using AmalgamBond Plus from a conventionally placed amalgam?

Answer 22

▪ Condense to all the walls immediately (witin 30 seconds)

Question 23

Do pins increase the retention of an amalgam when coupled with AmalgamBond Plus?

Answer 23

▪ Yes, by 4 times

Question 24

Do negative retentive features such as circumferential slots increase the retention of an amalgam when coupled with AmalgamBond Plus?

Answer 24

▪ No, you just get pooling

Question 25

Be able to assemble a circumferential matrix band in a standard and/or contra-angle Tofflemire retainer and place on a dentoform tooth. Describe qualities.

Answer 25

``` ● Dead soft contact ● Sealed gingival ● No wrinkles or shape distortion ● Nothing trapped inside ● ~1mm higher than highest cavomargin for amalgam ```

Question 26

Explain when you would choose a contra-angle retainer

Answer 26

▪ When retainer is balancing awkwardly/uncomfortably on the patients lip and have to place retainer at a different angle ▪ “The contra- angle retainer may be use when the retainer must be place on the lingual surface of the tooth. The angle of the handle allows it to be placed without the interference of the anterior teeth.”

Question 27

Recognize the difference between the Dixieland matrix and the universal Tofflemire matrix band and discuss the advantage of the Dixieland.

Answer 27

▪ Dixieland → come to you curved; Advantage: Stiffer so can withstand condensation, can be inserted if tooth is in contact ▪ Tofflemire: flat V

Question 28

Be able to discuss which component of the system is moving the teeth to compensate for matrix thickness (the wooden wedge, plastic wedge or retaining ring)

Answer 28

▪ Wooden wedge?

Question 29

Demonstrate how to determine the size of segmental matrix to choose

Answer 29

▪ Place it and want even with MR and to close the gingival margin (unlike tofflemire)

Question 30

Demonstrate the orientation of the segmental matrix during placement

Answer 30

▪ Smile face up to the occlusal

Question 31

Etchant used for All Bond Universal and how applied

Answer 31

Phosphoric acid - Initiate the phosphoric acid etch on enamel, then apply to dentin (limiting dentin exposure to 15 seconds). Agitate the acid. Rinse surface and remove excess moisture while still leaving enough moisture to ensure a surface that is still “reflective” (blot dry rather than air dry because a little too moist is better than a little too dry)

Question 32

After rinsing etchant for All Bond Universal, how dry do you want the surface?

Answer 32

Lightly air dry or blot with cotton roll/gauze

Question 33

Why do we apply 2% chlorhexidine gluconate?

Answer 33

60 seconds with gentle scrubbing action - moisten it if need be; cleans and disinfects

Question 34

What is the product name of the 2% chlorhexidine gluconate we use?

Answer 34

▪ Consepsis

Question 35

Do we rinse Consepsis off?

Answer 35

No

Question 36

How dry a surface do we leave before applying the 1st coat of AllBond Universal

Answer 36

▪ Dry to the same level of moistness that you did the dentin originally. ▪ “Remove excess water by blotting the surface with an absorbent pellet or high volume evacuation (HVE) for 1-2 seconds, leaving the preparation visibly moist”?

Question 37

How is the first coat of AllBond Universal applied and for how long? (painted, flooded, scrubbed?)

Answer 37

▪ Scrub for 10 seconds

Question 38

Do we rinse or air dry between coats of AllBond Universal?

Answer 38

No

Question 39

How is the second coat of AllBond Universal applied and for how long?

Answer 39

▪ Scrub for 10 seconds

Question 40

Do we rinse or air dry after the second coat of AllBond Universal? If so how long?

Answer 40

▪ Lightly air dry 10 seconds - no visible movement of adhesive

Question 41

What is the clinical sign that your application of AllBond Universal was adequate?

Answer 41

▪ Glossy finish

Question 42

If you don’t see a glossy finish after application of AllBond Universal, what do you do?

Answer 42

▪ Do an additional coat and repeat

Question 43

What is the final step of the application process for AllBond Universal?

Answer 43

▪ Light cure 10 seconds