Two cutting edges and a rounded toe for use of all surfaces
Barnhart Universal Curette
Effective for interproximal surfaces, use on anteriors and premolars, shortened blade version, super thin design
H6/H7
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Two cutting edges and a rounded toe for use of all surfaces - ANSWER- Barnhart
Universal Curette
Effective for interproximal surfaces, use on anteriors and premolars, shortened
blade version, super thin design - ANSWER- H6/H7
1-15 mm increments - ANSWER- UNC probe
Area-specific to allow for deep scaling, root planing, and periodontal debridement
- ANSWER- Gracey Curettes
Thicker, stronger, less flexible shank, preferred for heavy calculus removal,
shank is wider - ANSWER- Rigid Gracey Curettes
Designed for deeper perio pockets
Elongated terminal shank
Thin blade - ANSWER- After five gracey curettes
50% shorter blade for smaller roots, narrow pockets, furcations, and development
grooves - ANSWER- Mini Five gracey curettes
Increased access to molars
Mesial posterior use
Offset blade to scale mesial surfaces
Introduced in 1993 - ANSWER- Gracey 15/16 Curette
Improve access to distal surfaces of posterior teeth
Multiple bends improve handle position so it doesn't interfere with opposing arch
Reduced blade length enhances adaptation to entire tooth - ANSWER- Gracey
17/18 Curette
-Intraoral fulcrum which finger rest is on opposite arch form treatment area
,-Used to improve access to deep pockets and to facilitate parallelism to proximal
root surfaces - ANSWER- Opposite Arch Fulcrum
-Intraoral fulcrum where finger rest is established on opposite side of arch from
treatment area
-Rest ring finger on a tooth on opposite side of arch - ANSWER- Cross-Arch
Fulcrum
Extra-oral fulcrum which dominant hand rests against patients chin or cheek -
ANSWER- Basic Extraoral Fulcrum
-Intraoral fulcrum in which finger of non-dominant hand serves as resting point
for dominant hand
-Improves parallelism of lower shank to tooth surface
-Nondominant index finger provides stable rest for improved access to deep
perio pockets - ANSWER- Finger on Finger Fulcrum
Finger on non-dominant hand is used to concentrate lateral pressure against
tooth to help control instrument stroke
Index finger on non-dominant hand against shank of perio instrument - ANSWER-
Finger Assist Fulcrum
1. Debride root trunk using distal curette then mesial
2. Treat each root as separate tooth. Use distal on distal portion of each root.
3. Use mesial curette on each mesial root
4.Treat roof of furcation and concavity coronal to furcation entrance with mesial
curette - ANSWER- Sequence for Instrumentation on Multirooted teeth
Rapidly vibrating irrigate working-end to dislodge calculus from tooth, disrupt
biofilm, flush out bacteria from perio pocket - ANSWER- Powered Instrumentation
Devices
Converts air pressure into high frequency sound waves that produce vibrations
of working end; operate low frequency of 3000-8000 cycles per second and driven
by compressed air from dental unit - ANSWER- Sonic
Converts electrical energy into high frequency sound waves that produce rapid
vibrations; operates at 18,000-50,000 cycles per second - ANSWER- Ultrasonic
Electrical energy to activate crystals within handpiece to produce vibrations -
ANSWER- Piezoelectric
, Transfer energy to metal stacks or a ferrous rod to produce vibrations of powered
working-end - ANSWER- Magnetostrictive
Effective removal of calculus deposits and plaque biofilms
Pocket penetration
Access to furcation areas
Irrigation
Shorter Instrumentation time
Facilitation of difficult instrumentation tasks - ANSWER- Effectiveness of
Powered Ultrasonic Instrumentation
Several mechanisms of action - ANSWER- Ultrasonic: Mechanical, water
irrigation, and cavitation
One mechanism of action - ANSWER- Hand Instrumentation: mechanical calculus
removal
Large size working ends - ANSWER- Hand Instrumentation
Small size working end - ANSWER- Ultrasonic
Easily inserted in pocket with minimal distention of pocket wall - ANSWER-
Ultrasonic
Must be positioned apical to deposit resulting in considerable distention of
pocket wall - ANSWER- Hand
No cutting edges to sharpen - ANSWER- Ultrasonic
Frequent sharpening required - ANSWER- Hand
Low levels of splatter - ANSWER- Hand
High levels of aerosols - ANSWER- Ultrasonic
Work coronally to apical removing calculus deposits - ANSWER- Ultrasonic
Work apically to coronally - ANSWER- Hand
Less tissue trauma and faster healing - ANSWER- Ultrasonic
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