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Supragingiva calculus = plaque mineralizes - Coggle Diagram
Supragingiva calculus = plaque mineralizes
angulation: ideal 60 - 80 degrees
Application forces: pinch pressure = fingers. Stabilization = locking joints of ring finger. lateral pressure = pressure with index and thumb.
Steps for removal: Position the working end > lock the toe third > activate the stroke > pause between strokes.
Sickle scaler = calulus from crowns. tip, triangular, 2 edges, face perpendicular to lower shank.
Ant. sickles: ant sex (single ended)
post. sickle: post sex (double ended)
Design
Face: face is perp to the lower shank
Application: Ant and post
Working end: tip, 2 cutting edges
Function: removal of medium to large calculus
Cross section: triangular
Techniques
ant surfaces = the sickle has 2 edges - one edge per half of the tooth.
correct angulation = tilting lower shank 80d towards the Mesial surface
tip must be adapted to tooth (not middle of shank)
tip should be beneath proximal area
Lower shank should be parallel to the distal surface
Post. surfaces = sickle has 4 edges/2 working ends
lower shank toward tooth = 70 80 degree angle
start at distofacial line angle into distal surface. > reposition to aim towards the front of the mouth.
Subgingival calculus
insertion: during insertion the face to tooth surface angulation should be an angle of 0 and 40d. activate a stroke by opening the face to a 70 80d.
Universal curets.
used to remove small and medium sized calculus deposits. sub and supra. double ended with paired, mirror image
rounded back rouned tow simicircular two cutting edges face is at a 90 d angle to lower shank
inner cutting edge is closest to handle
face to tooth surface angulatoin is between 70 and 80d
lower handle and establish a 0d angulation
only one cutting edge per working end is used on anterior tooth surfaces (ant teeth are broken up into away and toward /// Post. teeth are broken by the distofacial line
area specific curets
Rounded back rouned tow and semicircular cross section, curved cutting edges
70d relationship cutting edge to shank
face tilts inward