chapter 39 part 2 Flashcards
What curets are area specific
Gracey Curets
Area specific curets are designed how?
Each curets is designed for adaption to specific surfaces
Working ends of gracey curets
paired Mirror-image. Usually placed on a single handle.
the original 7 pairs of gracey curets
1/2. 3/4. 5/6. 7/8. 9/10. 11/12. 13/14.
face of gracey curet
offset at an angle of 70 degrees in relation to the lower shank.
cutting edge of gracey curet
continuous around the face,
Variations of gracey curets were designed to
1.) to facilitate access to the base of deeper pockets.
“after 5 curet”
is 3 MM longer than standard curet.
“mini 5 curet”
blade is 3MM shorter than standard curet and shank is longer to reach the base of a deeper pocket.
“Micro mini 5 curet”
has a 50% shorter blade, the shank is longer and thinner
all shank adaptions of gracey curets give you
access to deeper pockets.
which Gracey is in our kit?
1/2 micro mini 5
Burnishing can cause
Calculus to be embedded into the root surface and cause permanent damage
burnishing occurs when
dull instruments don’t scale the calculus off, but rather take small layers off and smooth the calculus.
the blade of a gracey curet that has a variation is
reduced in length for special adaption to root curvatures difficult to access
Purpose of Curets
Curets are the standard instrument for SUBgingival calculus, and can be used to remove supragingival calculus close to the gingival margin
Blade of the curets forms a
70 degree angle with the tooth
adaption of curet
the toe third or lower third of the cutting edge is maintained on the tooth surface at all times
Sequence of TX for instruments
- ) explore
- ) ultrasonic
- ) scale
- ) universal curet
- ) area specific curet
curets with a slender shank allow what?
entrance into the sulcus orocket with minimal trauma to the gingival margin
the rounded back of the curet minimizes
possible trauma at the base of the pocket
universal curets are used for
subgingival scaling for removal of as much calculus as possible
Area specific curets follow universal curets for
fine scaling and root planning.
curved/sickle scalers
2 cutting edges on a curved blade.
the face converges with the 2 lateral surfaces to form the tip of the scaler, which is a sharp point.
Curved/sickle scaler in Xsection
triangular in shape
Straight/ Jacquette scaler
2 cutting edges on a straight blade.
the face is flat
Angulation of the shank on scalers
straight and adaptable for primarily anterior teeth. -may be used to Tx premolars
Modified or contra-angled scaler
paired instruments that are mirror images of each other to provide access to the proximal surfaces of posterior teeth
(1 adapts from the Facial and the other adapts to the Lingual/palatal surfaces)
Use of scalers
Mainly supragingival calculus
contraindications of scalers
- using subgingivally can cause trauma to gingival tissue. can scratch the cemental surface.
- Tactile sensitivity is reduced w/ larger heavier, blades
angulation of face of blade of scalers
adapted to the tooth surface at appr. 70 degrees
application of using scaler
pull stroke only.
more heavy rigid shank is used for
heavier calculus deposits
thinner shank used for
light calculus
need to use a hollow handle for
better tactile pressure and not as heavy (hard on hands)
stability is essential for
effective controlled action of an instrument
modified pen grasp
thumb, index and middle finger hold instrument with the ring finger on stable surface as a fulcrum
fulcrum/ finger rest
the support or point of rest on which a lever turns in a moving body. a finger rest is always used when instruments are applied to teeth and gingiva
Objectives for finger rest
- ) stability
- ) Unit control
- ) prevention of injury (carpal tunnel)
- ) comfort for the patient
- ) control of length stroke
Types of stroke by direction
- diagonal or oblique
- vertical
- horizontal
why do we not fulcrum on mobile teeth
there isn’t proper stability and it can further damage an already weak periodontium
Universal curet face blade is
at a 90 degree angle with lower shank
face blade of gracey curet is
at a 70 degree angle with the lower shank
