Rubber Dam + Clamps

Question 1

What teeth is the 26 clamp used for

Answer 1

Used for:

• first adult molar with visible cervical bulge
• second primary molar

Question 2

What teeth is the 8A clamp used for?

Answer 2

Used for:

• second primary molar
• first, second, and third, adult molars with reduced DL cusp

Question 3

What teeth is the 14 clamp used for

Answer 3

Used for:

- first and second adult molars with normal DL cusp

Question 4

What teeth is the 14A clamp used for?

Answer 4

Used for:

- large adult first molars

Question 5

Name the fully erupted teeth and partially erupted teeth clamps

Answer 5

Fully erupted:
- W2, W3, 27N, 26

Partial erupted:
-8A, 14, 14A

Question 6

When considering clamp placement, what is the most important consideration?

Answer 6

When the abutment tooth has a lesion to be restored

Question 7

What is the main function of fully erupted teeth clamps vs. the partial erupted teeth clamps?

Answer 7

Fully erupted - retraction

Partially erupted - retention

Question 8

What is the 13A clamp and 12A clamp used for? What is their relationship to each other?

Answer 8

13A - LR and UL
12A - LL and UR
Both used for adult or large primary second molars

Their relationship: isomers

Question 9

Where is the prong directed for fully erupted vs. partially erupted teeth?

Answer 9

Fully erupted - prong direct to side of tooth

Partially erupted - prong directed toward cervical portion of tooth

Question 10

What are some advantages to retraction clamps?

Answer 10

• good retraction = good access to smooth surface
• 27N and 26 best for molar teeth
• if placed carefully, might not need palatial anesthesia

Question 11

What are some advantages to retention clamps?

Answer 11

• can be used on teeth with cervical convexity

- can be used on teeth with cavosurface margin below the gingival margin

Question 12

Where should you put the frame of the dam?

Answer 12

1 inch below the top of the dam

Question 13

What does “positioning the H” for rubber dams accomplish?

Answer 13

It facilitates soft tissue reflections and decreases the chance for forces that can dislodge the clamp

Question 14

To which tooth should the dam go up to if you are doing a procedure on more than a single tooth in the posterior? Why?

Answer 14

The mesial of the canine. This is because the mesial (convexity of the canine provides a reliable means of maintains the dam.

Question 15

Why is it common for adult dams to have individual holes for teeth and extend to include more teeth?

Answer 15

Because adult teeth have greater clinical crown length and more Buccal + lingual contours

Question 16

What size bite block should you use for young children? For exfoliating children?

Answer 16

Young = size 2
Exfoliating = size 10

Question 17

What is the proper position of the bite block?

Answer 17

The anterior edge of the bite block should be just behind the lower canine

Question 18

When placing a bite block what should always be prepared on it? (Hint: same as a clamp)

Answer 18

There should always be floss around the BB that connects the bite surfaces

Question 19

Child has hyper plastic gingiva overgrowth that goes into inter proximal cavitations. This leads to bleeding on excavation, and interferes with procedures. What is a simple/temporary solution?

Answer 19

Place a wooden wedge before any instrumentation

Question 20

What is the clamp of choice for primary incisors and canines?

Answer 20

W2

Question 21

When do you use a W3 vs. a 26 for a 1st molar?

Answer 21

If the 1st molar is large, you use a 26. If the 1st molar is medium sized, use W3.

Question 22

What teeth is the 27N clamp used for?

Answer 22

It is used for:

• second primary molars
• large premolars