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dh theory > Ultrasonic > Flashcards

Ultrasonic Flashcards

1
Q

Objectives of Periodontal Debridement

A

Disruption and removal of subgingival biofilm
Removal of plaque retentive factors
Conservation of tooth structure
Resolution of inflammation

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2
Q

What is the primary action of ultrasonic instrumentation?

A

Mechanical action.

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3
Q

What is the purpose of irrigation with ultrasonic instruments?

A

Irrigation uses water to counteract frictional heat generated by the oscillating tip moving against the tooth surface.

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4
Q

What is cavitation in ultrasonic instrumentation?

A

The formation and explosive collapse of microscopic bubbles in a liquid due to forces acting on the liquid.

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5
Q

What is acoustic microstreaming?

A

It occurs near any object in oscillatory motion in liquid, creating fluid movement around the object.

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6
Q

Magnetostrictive armamentarium

A

Insert
Handpiece
Base unit
Foot switch

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7
Q

Piezoelectric armamentarium

A

Tip
Handpiece
Base unit
Foot switch

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8
Q

Ultrasonic Operational Variables

A

Operating frequency
Power input
Water flow rate
Tip diameter
Tip shape

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9
Q

What factors influence the amount of cavitation and microstreaming activity?

A

The efficiency of the mechanical mechanism of action and the acoustic power.

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10
Q

What factors affect the level of acoustic power in ultrasonic instrumentation?

A

Displacement amplitude
Tip diameter
Tip shape.

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11
Q

What does the diameter of an ultrasonic tip refer to?

A

The width of the tip.

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12
Q

What are key design features of ultrasonic tips?

A

Diameter, shape, geometry, profile, and monitoring tip.

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13
Q

What are the possible shapes of an ultrasonic tip?

A

Circular or rectangular cross-section.

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14
Q

What is the geometry of an ultrasonic tip?

A

The number of places the shank crosses.

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15
Q

What does the profile of an ultrasonic tip refer to?

A

The number of bends in the active area.

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16
Q

When should an ultrasonic tip be replaced?

A

When 2mm of the tip length is lost, according to manufacturers.

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17
Q

What are specialty tips?

A

Tips designed for specific tasks or areas in ultrasonic cleaning.

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18
Q

What is a straight ultrasonic tip?

A

A tip slightly curved in one direction, for universal use.

19
Q

What are contrangled ultrasonic tips?

A

Paired instruments used in specific areas.

20
Q

What are periodontal ultrasonic tips?

A

Thin, straight tips designed for subgingival areas.

21
Q

What are slimline ultrasonic tips?

A

Tips designed for deeper access to subgingival areas.

22
Q

What are thicker blue and green ultrasonic tips used for?

A

Higher settings for moderate to heavy calculus.

23
Q

What is the purple ultrasonic tip used for?

A

It’s thinner, used for light calculus or biofilm disruption and should be used on lower power.

24
Q

What is the purple ultrasonic tip good for?

A

Gingivitis patients

24
Q

Adaptation techniques for the Ultrasonic

A

Vertical
Horizontal
Oblique

25
Q

Ultrasonic Instrumentation Technique Principles

A

Adaptation
Angulation
Lateral pressure
Working stroke

26
Q

How is the ultrasonic tip advanced in channeling?

A

The tip is advanced to the base of the pocket using the indicated stroke pattern.

27
Q

How is the grasp determined for ultrasonic instrumentation?

A

Balancing the handpiece between the thumb and forefinger.

28
Q

What is the purpose of a fulcrum in ultrasonic instrumentation?

A

stabilization

29
Q

How should ultrasonic instrumentation be done for efficiency?

A

Work by sextant to reduce the frequency of changing the tip.

30
Q

What is the benefit of working by sextant in ultrasonic instrumentation?

A

It requires fewer changes in the operator’s position.

31
Q

How should you advance the ultrasonic tip?

A

Begin on the most terminal tooth and advance toward the operator.

31
Q

How long should you flush water lines before starting?

A

60 seconds.

32
Q

What should you do before using the ultrasonic handpiece?

A

Fill the handpiece with water and insert the appropriate tip.

33
Q

How should the water supply be adjusted for ultrasonic instrumentation?

A

Fine mist

34
Q

How should the ultrasonic tip be positioned on the tooth surface?

A

The tip should be parallel to the tooth surface.

35
Q

What should the angulation of the ultrasonic tip be near?

A

Near zero degrees.

36
Q

How much lateral pressure should be applied when using the ultrasonic tip?

A

Little to no lateral pressure.

37
Q

What is important to remember about the tip during ultrasonic instrumentation?

A

Keep the tip moving at all times.

38
Q

What are some medical conditions that require special consideration for ultrasonic instrumentation?

A

Communicable diseases
Immunocompromised patients
Kidney disease
Chemotherapy
Organ transplant
Respiratory conditions
Dysphagia
Pacemakers.

39
Q

Which respiratory conditions may require special consideration?

A

COPD
Emphysema
Uncontrolled asthma
Cystic fibrosis.

40
Q

Why should caution be used with patients who have dysphagia or gag easily?

A

They are at risk for aspiration pneumonia.

41
Q

What neurological conditions require special consideration during ultrasonic treatment?

A

Multiple sclerosis (MS)
Parkinson’s disease
Muscular dystrophy (MD)
Post-stroke.

42
Q

Can you use a cavitron if the pacemaker is unshielded?

A

No

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