G. Mod. 15 Sickle Scalers Flashcards
Sickle scaler used to remove calculus on what surfaces
Used to remove calculus from crowns of teeth
NOT root surfaces
Design characteristics of sickle
Tip, back, cross section, cutting edges, face Angulation
Pointed tip and back
Triangular cross section
2 cutting edges per working end
Face perpendicular to lower shank (90*)
Anterior sickles
____ ended. May have 2 _____ sickles on double ended instrument
Single ended, may have 2 different sickles on double ended instrument
Posterior sickles
2 ____ sickles on doubled ended instrument
Working ends are ____ ____
2 sickles paired on doubled ended instrument
Working ends mirror images
Adaptation
Angulation
Adaptation=tip third only
Angulation=70-80*
What is a sickle scaler used to remove
(Size and location of calculus)
Medium to large supra gingival calculus deposits
Lateral pressure
Mod to firm pressure against tooth
Controlled short strokes (various directions) away from soft tissue
Handle Moves slightly away from tooth before next stroke
Correct Angulation achieved by
Tilting lower shank toward tooth surface
Roll instrument handle in a series of
When to roll to maintain adaptation
Tiny movements around line angle into proximal area
Roll between strokes
Correct working end posterior sickle
Lower shank=parallel to distal surface
Functions shank=up and over
Inner cutting edge
Closer to handle
Used on distal surfaces
Outer cutting edge
Used on what surfaces
Farther from handle
Used on facial, lingual and mesial surfaces
How many cutting edges on a posterior sickle
4
Primary crowns have a ____ enamel surface and CEJ
Rougher
Nevi 1
Smaller, thin anterior sickle scaler
