Pre Clinic - Power Instruments
Electronically powered instrumentation uses - ✔✔ correct answer rapid energy vibrations of a
powered instrument tip to fracture calculus deposits from the tooth surface and clean the
environment of the periodontal pocket
Electronically powered devices use - ✔✔ correct answer water-cooled instrument tips
HAVE to use this bc tip gets very hot
Research investigations indicate that electronically powered devices are - ✔✔ correct answer not
only as effective as hand instrumentation but also have some advantages over hand instrumentation
1. Removal of Calculus - ✔✔ correct answer Powered instrumentation is as effective as hand
instrumentation in removing calculus deposits
2. Removal of Plaque - ✔✔ correct answer Powered instruments are especially effective in disrupting
the subgingival plaque biofilm from root surfaces and from the pocket space
3. Access to Furcations - ✔✔ correct answer With proper technique, slim-diameter instrument tips
are more effective in treating Class II and III furcations
4. Conservation of Cementum - ✔✔ correct answer Used with proper technique, electronically
powered instruments on low or medium power settings seem to do less damage to the root surface
than hand instruments
Lowest setting possible = more effective, safer for tooth
5. Pocket Penetration - ✔✔ correct answer Slim-diameter instrument tips penetrate deeper into
periodontal pockets than hand instruments
6. Irrigation (Lavage) - ✔✔ correct answer A constant stream of water exits near the point of the
electronically powered instrument tip
This water stream within the periodontal pocket is termed the - ✔✔ correct answer fluid lavage
, Pre Clinic - Power Instruments
Fluid Lavage - ✔✔ correct answer Water irrigation of the pocket washes toxic products and free-
floating bacteria from the pocket
The water stream also provides better vision during instrumentation by removing blood from the
treatment site
Fluid Lavage - ✔✔ correct answer The water lavage reaches a depth that is equal to the depth
reached by the powered instrument tip
7. Bactericidal Effect - ✔✔ correct answer Just the act of holding an activated ultrasonic tip in the
periodontal pocket is destructive to the bacteria
The action of the electronically powered tip is capable of - ✔✔ correct answer disrupting bacterial
cell walls and may also disrupt plaque biofilms slightly beyond the reach of the instrument tip
Several studies have shown that instrumentation time may be - ✔✔ correct answer reduced when
using powered instruments as compared with hand instrument
Limitations of Powered Instrumentation:
1. Aerosol Production - ✔✔ correct answer Powered instruments generate high levels of
contaminated aerosols
Microorganisms in dental aerosols have been shown to survive for up to 24 hours
The use of an - ✔✔ correct answer antimicrobial mouth rinse before treatment can reduce bacterial
counts in aerosols by about 92 percent
Also known as = pre procedural rinse
Before any treatment for ALL clients = administer rinse to reduce the aerosols
2. Cardiac Pacemakers - ✔✔ correct answer Patients with cardiac pacemakers should NOT be
exposed to magnetostrictive ultrasonic devices
Electronically powered instrumentation uses - ✔✔ correct answer rapid energy vibrations of a
powered instrument tip to fracture calculus deposits from the tooth surface and clean the
environment of the periodontal pocket
Electronically powered devices use - ✔✔ correct answer water-cooled instrument tips
HAVE to use this bc tip gets very hot
Research investigations indicate that electronically powered devices are - ✔✔ correct answer not
only as effective as hand instrumentation but also have some advantages over hand instrumentation
1. Removal of Calculus - ✔✔ correct answer Powered instrumentation is as effective as hand
instrumentation in removing calculus deposits
2. Removal of Plaque - ✔✔ correct answer Powered instruments are especially effective in disrupting
the subgingival plaque biofilm from root surfaces and from the pocket space
3. Access to Furcations - ✔✔ correct answer With proper technique, slim-diameter instrument tips
are more effective in treating Class II and III furcations
4. Conservation of Cementum - ✔✔ correct answer Used with proper technique, electronically
powered instruments on low or medium power settings seem to do less damage to the root surface
than hand instruments
Lowest setting possible = more effective, safer for tooth
5. Pocket Penetration - ✔✔ correct answer Slim-diameter instrument tips penetrate deeper into
periodontal pockets than hand instruments
6. Irrigation (Lavage) - ✔✔ correct answer A constant stream of water exits near the point of the
electronically powered instrument tip
This water stream within the periodontal pocket is termed the - ✔✔ correct answer fluid lavage
, Pre Clinic - Power Instruments
Fluid Lavage - ✔✔ correct answer Water irrigation of the pocket washes toxic products and free-
floating bacteria from the pocket
The water stream also provides better vision during instrumentation by removing blood from the
treatment site
Fluid Lavage - ✔✔ correct answer The water lavage reaches a depth that is equal to the depth
reached by the powered instrument tip
7. Bactericidal Effect - ✔✔ correct answer Just the act of holding an activated ultrasonic tip in the
periodontal pocket is destructive to the bacteria
The action of the electronically powered tip is capable of - ✔✔ correct answer disrupting bacterial
cell walls and may also disrupt plaque biofilms slightly beyond the reach of the instrument tip
Several studies have shown that instrumentation time may be - ✔✔ correct answer reduced when
using powered instruments as compared with hand instrument
Limitations of Powered Instrumentation:
1. Aerosol Production - ✔✔ correct answer Powered instruments generate high levels of
contaminated aerosols
Microorganisms in dental aerosols have been shown to survive for up to 24 hours
The use of an - ✔✔ correct answer antimicrobial mouth rinse before treatment can reduce bacterial
counts in aerosols by about 92 percent
Also known as = pre procedural rinse
Before any treatment for ALL clients = administer rinse to reduce the aerosols
2. Cardiac Pacemakers - ✔✔ correct answer Patients with cardiac pacemakers should NOT be
exposed to magnetostrictive ultrasonic devices
