portion between the working end and the last bend in the shank closest to the handle
functional shank
portion of the functional shank closest to the working end, between the working end and the first bend
terminal shank
refers to the part of the instrument that does the function
working end
instruments that have a triangular cross-sectional shape and have a pointed back and tip
sickle scaler
instruments that have a semi-circular cross-sectional shape and have a rounded back and toe
curettes
where is a difficult place where a extraoral fulcrum may be used?
maxillary posteriors
tip third of the working end is always against the tooth to avoid injuries
adaptation
what is ideal angulation for calculus removal?
60-80 degrees
what angulation will result in tissue damage?
greater than 90
what type of strokes do you used with an explorer that are feather-light, long, and overlapping
assessment/exploratory stoke
what type of strokes do you used for a probe
bobbing stokes
walking stroke
what type of stokes do you used with a sickle scaler or curet that are short, biting, controlled, overlapping with firm lateral pressure
working, calculus removal stroke
what strokes are used as shaving strokes with moderate pressure, longer than calculus removal stokes
root debridement stoke
what are three functions of a probe?
detect, evaluate, and measure
what instruments have 2 cutting edges?
blade face is at 90 degree
scalers and universal curettes
what instrument has only 1 cutting edge?
blade face is at 60-70 degree
area-specific curettes
what does “after five” mean when referring to an instrument
that the terminal shank is 3mm longer to work in periodontal pockets effectively
used to remove heavy bulky supragingival calculus
hoe
used to crush calculus for the preparation of removal with other instruments especially on burnished areas
use of a vertical pull stoke
file
what materials can you use of implants for instrumentation?
titanium, plastic, gold-coated
what direction should you sharpen your instruments?
heel to toe
the smaller the particles what does that do to the abrasiveness?
lessens it