Deck 25: Power Scaling

Question 1

The most appropriate power scaling tip for lower anterior teeth with root surfaces that have been over-scaled with hand instruments is a

A) Bladed tip
B) Curved tip
C) Slim tip
D) Universal tip

Answer 1

Curved tip

Question 2

Periodontal or "slim" tips

A) Should be used on high power
B) Are ideal for heavy calculus
C) Are bulkier than standard tips
D) Provide better access to deeper periodontal pockets

Answer 2

Provide better access to deeper periodontal pockets

Question 3

The most appropriate power scaling tip for a client with 3- to 5-mm probe depths,heavy plaque,calculus deposits,and a 45% bleeding index is a

A) Curved tip
B) Slim tip
C) Triple bend tip
D) Bladed tip

Answer 3

Triple bend tip

Question 4

Which statement best describes a prominent benefit of a microultrasonic instrument?

A) Disrupts biofilm in deep pockets
B) Is effective for supragingival scaling
C) Minimizes excessive cementum removal
D) Removes moderate deposits in deep pockets

Question 5

The use of power scaling devices compared to manual instrumentation has been estimated to improve clinic efficiency by approximately

A) 20%
B) 30%
C) 40%
D) 50%

Question 6

All of the following are types of power scaling devices EXCEPT one.Which one is the EXCEPTION?

A) Sonic
B) Magnetostrictive
C) Elliptical
D) Piezoelectric

Question 7

Each of the following techniques will reduce hand and wrist fatigue when using power scalers EXCEPT one.Which one is the EXCEPTION?

A) Drape the hand piece cord around the neck toward the dominant hand.
B) Grasp the hand piece so it sits between the thumb and index finger.
C) Wrap the hand piece cord around the forearm of the dominant hand.
D) Wrap the hand piece cord between fingers of the dominant hand.

Question 8

Increasing the power on an ultrasonic device

A) Delivers a longer,more powerful stroke
B) Delivers a shorter,less powerful stroke
C) Does not change the stroke
D) Increases the water flow

Question 9

A preprocedural rinse should be utilized prior to instrumenting with a power scaling device in an effort to

A) Increase patient comfort
B) Decrease pathogens present in aerosols
C) Debride the dentition
D) Anesthetize the tissues

Question 10

A patient with chronic obstructive pulmonary disease requires nonsurgical periodontal therapy due to 5- to 6-mm probe depths and moderate calculus deposits.The best instrument to begin treatment with is a

A) Diamond power tip
B) Periodontal power tip
C) Universal manual curet
D) Universal power tip

Question 11

What type of scaling device is the most appropriate for nonsurgical periodontal therapy in a patient with a gag reflex?

A) Magnetostrictive
B) Manual
C) Piezoelectric
D) Sonic

Question 12

Following debridement using a piezoelectric ultrasonic scaler a dental hygiene student discovers several pieces of residual calculus.What did the student most likely use to cause this issue?

A) A high amplitude
B) A 25K tip in a 30K unit
C) The back side of the tip
D) Too light amount of pressure

Question 13

Immediately after beginning debridement in a 6-mm pocket with an ultrasonic scaler your patient reports gum tissue soreness.What is the most likely cause?

A) Backside of the tip is toward tooth
B) Insertion occurred at buccal surface
C) Power setting is turned up too high
D) Tip is at a 25-degree angle to the tooth

Question 14

The use of power scaling is contraindicated in patients who present with

A) Composites
B) Crowns
C) Demineralization
D) Recession

Question 15

While reviewing a new patient's health history you discover the patient had a pacemaker implanted in 1990.What should be the first course of action prior to using a magnetostrictive ultrasonic scaler?

A) Contact the manufacturer of the pacemaker.
B) Proceed using hand instruments only.
C) Proceed with periodontal debridement as planned.
D) Use a piezoelectric ultrasonic scaler instead.

Question 16

During debridement a dental hygiene student is unable to remove supragingival heavy stain on the lingual of the lower anterior teeth with a beavertail ultrasonic tip.What is the most likely reason?

A) The tip is incorrectly adapted to the tooth surface.
B) There is a 25% loss of tip efficiency.
C) Tip wear is approximately 2 mm.
D) The tip was placed in an ultrasonic cleaner.

Question 17

What part of an insert should never be directed at the tooth surface?

A) The lateral surface
B) The convex surface
C) The concave surface
D) The point of the tip

Question 18

When instrumenting with a power scaling device all of the following techniques should be adhered to EXCEPT one.Which one is the EXCEPTION?

A) Use a modified pen grasp.
B) Keep the tip moving at all times.
C) Keep the tip directly against the tooth at all times.
D) Adapt the tip parallel to the tooth surface.

Question 19

Ultrasonic scaling devices operate at a frequency between

A) 3,000 and 8,000 cps
B) 8,000 and 10,000 cps
C) 15,000 and 18,000 cps
D) 18,000 and 50,000 cps

Question 20

Microultrasonic tips are

A) Small-diameter tips
B) Large-diameter tips
C) Diamond-coated tips
D) Bladed tips

Question 21

Cavitation using power scalers refers to the root damage caused by pointing the insert tip toward the root.

Question 22

Proper hand instrumentation pressure produces less root surface structure removal than power scaling.

Question 23

Diamond-coated ultrasonic tips are useful for smoothing rough root surfaces.