PRDS

Card Set Information

Author:
sisileybao
ID:
39762
Filename:
PRDS
Updated:
2010-10-04 20:04:09
Tags:
Burs
Folders:

Description:
D1 Fall
Show Answers:

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  1. Round Bur
    1/2, 1/4, 2, 4, 6

    • 6 flutes,
    • decay removal,
    • endo,
    • create round internal form
  2. Inverted cone
    34D

    • - Most important cutting bur
    • - Short head height allows interproximal cut w/o damaging adjacent teeth
    • - Creates undercuts

    Diamond creates rounded internal line angles (cuts)
  3. Egg
    379F, 379 EF

    Smooth concave surfaces

    Smoothing lingual surfaces of anterior teeth

    • EF = extra fine
    • (finer diamond grits)
  4. Needle
    135F, 135EF

    • Smooth convex or flat surfaces
    • Making large bevels
    • Removing excess composite filling material
  5. Needle Tip
    132F

    Making small bevels and refined cuts
  6. Pencil shaped
    247F, 247EF

    • Adding in anatomy & detail on occlusal
    • surfaces of composite
    • Rounded internal angles
    • Diamond burs do not create sharp internal line angles
  7. Fissurotomy
    8274

    Cleaning out fine grooves on occlusal surfaces
  8. Cylinder
    835

    Parallel smooth walls
  9. Pear
    Carbide 245, 330D

    • Converging smooth walls
    • Rounded internal angles
  10. Tapered
    1169 L
  11. Diverging smooth walls
    NOT in kit
  12. Tapered Chamfer
    856

    • Creates smooth gradual reduction
    • Tapered cut
    • Cutting extra-coronal preparations

    NOT in kit
  13. Multi-fluted
    7404

    Multi-fluted (12, 24, 30, spiral)

    Finer cutting and polishing

    (6 flutes – rough cutting)

    Especially metal
  14. Bur rotation
    Concentric, not eccentric
  15. Carbide charateristics
    (Tungsten added to steel)

    - Cuts clockwise

    • -
    • Sawing and chipping action

    • -
    • 6 flutes

    • -
    • Can dull easily

    • -
    • Strain hardens with use

    • -
    • Gets brittle easily

    Then creates heat
  16. Diamond
    • -
    • Diamond particles are backed into nickel
    • substrate

    • -
    • Diamond burs hardest

    • -
    • Abrade everything

    • -
    • Grits used and color

    Diamond burs do not create sharp internal line angles

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