DEN4455 Wk 14

What am I?

• a pigtail explorer

• a Wiland carver

• a T3 carver

Answer explanation

This instrument is OFTEN mistaken for the Wiland carver - look carefully at the working end.

How do explorers differ from carvers?

What am I used for ?

• scoop out diseased tooth structure

• carver newly placed amalgam

• shape composite materials

• burnish a matrix band

Answer explanation

This instrument is OFTEN mistaken for the spoon excavator

Which of the following statements is NOT true?

• The universal retainer holds the matrix snugly in position.

• The outer knob of the universal retainer secures the matrix band when tightened.

• The universal retainer is most often positioned in on the lingual of the tooth of operation.

• The inner knob of the universal retainer can adjust the circumference of the matrix band.

Answer explanation

The retainer is most often seated on the buccal of the operative tooth.

Which type of rotary instrument shank is placed into a high-speed handpiece?

• straight

• friction-grip

• latch-type

• curved

All of the following are uses for a low-speed handpiece except:

• removal of old or faulty restorations

• finishing and polishing restorations

• root canal treatment

• coronal stain removal

The 3 basic parts of a rotary instrument are:

• handle, shank & working end

• shank, neck & head

• neck, head & handle

• shank, neck & working end

Answer explanation

1: head

2: neck

3: shank

A ________-shaped diamond rotary instrument provides access to the pulp chamber.

• cylinder

• flame

• wheel

• round

Identify all the positions below which are deviations from the neutral position.

• twisting to the side

• overbending backwards

• elbows at 45 degree angle by side

• leaning forward to reach for items

Which instrument grasp holds the instrument in the palm of the hand and uses the thumb to stabilize and guide the instrument?

• Reverse palm-thumb grasp

• palm grasp

• pen grasp

• palm-thumb grasp

Double-ended hand instruments are characterized by having two working ends and.......

• two shanks

• two handles

• a single shank

• are made in left-handed sets for left-handed operators and right-handed sets for right-handed operators