techniques 15, 17, 19, 21

SS is sickle scaler, UC is universal curet, ASC is area specific curet

Position of SS face

perpendicular to lower shank

Anterior SS

often single ended, if double sided typically both sickles

Posterior SS

often double ended, paired working ends

Anterior SS name

NEVI 1

Ideal angle for SS and UC

70-80º

Posterior position for SS, UC, and ASC

up and over

Anterior SS deposit sizes

good for medium to large deposits

Inner edge of SS and UC used for

used for distal

Outer edge of SS and UC used for

used for facial, lingual, and mesial

Where UC are used

supra and sub, ant and post

UC deposit sizes

good for small to medium deposits

UC face to lower shank

face is perpendicular to lower shank

Anterior position UC

NOT up and over, cross

Edge used for anterior with UC

only outer edges are used

Horizontal strokes with UC advantages

good for posterior line angles and anterior midlines

ASC deposit sizes

good for small deposits

Cutting edges of ASC

curved

Face of ASC

tilted

Which edge is used ASC

only the lower edge is used

Ideal angle for ASC

already at 70º

Anterior position ASC

face tilts towards surface

Caution about advanced fulcrums

can only be done if you master standard first

Advanced fulcrums are used for

access of root surfaces and deep pockets

Modified intraoral

intraoral where ring finger isnt in full contact with middle finger

Cross arch

intraoral where finger rest is on opposite side of arch than working area

Opposite arch

intraoral where finger rest is on opposite arch than working area

Finger on finger

intraoral where nondominant finger is used as rest for fulcrum

Extraoral advanced fulcrums advantages

good for reaching maxillary 2nds and 3rds, achieving parallelism of shank and neutral wrist position with molars

Caution about extraoral fulcrums

must grasp farther from working end, less control (more likely to stick), requires more skill/muscle coordination

Basic

extraoral where knuckle or hand rests on chin or cheek

Chin cup

basic extraoral where patient chin is used as fulcrum for palm

Finger assist

extraoral where finger of nondominant hand acts as a guide/support for shank