US and Sealant Review

All the following statements concerning sealants are true exept:

• Act as a physical barrier

• Noninvasive

• Most commonly applied to newly erupted primary molars

• Prevents biofilm from colonizing within pits and fissures

Cavitation and acoustic microstreaming are generated by the vibrating tip transmitting ultrasonic energy into the irrigating water.

Cavitation and acoustic microstreaming are hydrodynamic forces capable of disrupting plaque biofilm

• Both statements are true

• Both statements are false

• The first statement is true; the second statement is false

• The first statement is false; the second statment is true

A contraindication to sealant placement is:

• Childhood asthma

• Proximal caries evident on a radiograph

• Malocclusion

• Poor oral hygiene

The ultrasonic tip diameter that has the greater mass is:

• Slim

• Ultra-Slim

• Standard

• Fine

The most common reason for sealant retention failure is:

• Inexpensive sealant material

• Salivary contamination

• Age of client

• Inexperienced clinician

Opening the active area of the oscillating ultrasonic tip more than a 15-degree angulation:

• Is standard contact of tip to tooth

• Negatively alters root surfaces

• Is better for hard deposit removal

• Requires applying more lateral pressure

Vibrations produce microscopic high and low pressure areas that form bubbles filled with water vapor rather than air. The vibration stretches and compresses tiny bubbles until they implode and release a burst of heat and pressure. This action is called:

• Oscillation

• Acoustic microstreaming

• Cavitation

• Ultrasonic