Mod 1 Flashcards
what are the 3 objectives of sharpening
-restore cutting edge
-preserve original shape
conserve blade material
what are 3 reasons we should sharpen
less fatigue
easier and more effectively remove calc
increased patient comfort
less fatigue
- less pressure on finger rest
- less force
increased patient comfort
- fewer strokes
-less force0
decreased tissue trauma
less chance of slipping
how many strokes cause a rounded edge?
significant rounding of edge?
roughly how many patients is this
15
45
1-2 patients
what are some problems with sharpening
difficult to maintain same angle and orig contour
hard to calibrate between operators
when do we sharpen
first sign of dullness
before pt is seated
during appt
before sterilization
what is the shape of the blade in a curet?
scaler?
half circle
triangular
what is the angle to the terminal shank of a universal curet?
area specific?
scaler?
90
70
90
what kind of toe does a curet have? scaler?
rounded
pointed tip
what edge is sharpened on a area specifice curette
the lower edge
what are 2 ways to determine sharpness
visually (light), manually
What are the kinds of sharpening stones and when are they used
fine- routine sharpening
medium- light recontouring
coarse- excessively dull instruments
when should you use oil when sharpening
if you are going to sterilize stone and instruments after use
when should mechanical sharpeners be used
with sterile instruments
what are 3 types of sharpening techniques
freehanded
guided
mechanical
what is the freehanded technique
moving the stone or the instrument
what is the guided technique
gleason, premier, discus, horse
what is the mechanical technique
periostar
sidekick
instarenew
in the moving instrument technique what angle is the cutting edge maintained at as the instrument is pulle
110
in the moving stone technique how should you hold the instrument face
parallel to the floor
what angle is made with the stone in the moving stone
100-110
what can a hygienist do to prevent dulling of instruments
- routine sharpening
- use a cassette
- careful around amalgams and margins
