DHY 150 FPI 16 and 17 with
complete verified solutions 2025
subginigval calculus
calculus deposits located apical to the gingival margin
hidden from clinical view
localized or generalized
flattened from pressure of pocket
plaque retention
pathological potential of subgingival calculus
always covered with disease causing bacteria
significant contributing factor in periodontal disease
difficult to control gingivitis or periodontitis in presence of calculus
very important to remove these deposits
the sense of touch subgingival calculus
requires greater skill than supragingival calculus removal
cannot see working end of instrument beneath ginigval margins must rely
on sense of touch
visualizing the unseen subginigval calculus
MUST visualize the position of the working end
MUST visualize tooth and periodontium anatomy
angulation for insertion for curets
0º to 40º
requires face-to-tooth surface angulation "closed angle"
face of curet should hug the tooth surface throughout the entire process
of insertion
, get ready zone for angulation for insertion of curets
middle third of crown at distofacial line angle
step 1 get ready zone
turn the toe of working-end toward the correct surface
get ready zone
out of line of fire - finger rest is never established directly above the tooth
surface being worked on
step 2 close the face
0º to 40º
face should hug the tooth
step 3 insert
gently insert below gingival margin
imagine the face sliding down the root surface
step 4 establish angulation
open face between 60 to 70º for root debridement stroke (shaving stroke)
moderate pressure
open face between 70º and 80º for calculus removal stroke from pressure
complete verified solutions 2025
subginigval calculus
calculus deposits located apical to the gingival margin
hidden from clinical view
localized or generalized
flattened from pressure of pocket
plaque retention
pathological potential of subgingival calculus
always covered with disease causing bacteria
significant contributing factor in periodontal disease
difficult to control gingivitis or periodontitis in presence of calculus
very important to remove these deposits
the sense of touch subgingival calculus
requires greater skill than supragingival calculus removal
cannot see working end of instrument beneath ginigval margins must rely
on sense of touch
visualizing the unseen subginigval calculus
MUST visualize the position of the working end
MUST visualize tooth and periodontium anatomy
angulation for insertion for curets
0º to 40º
requires face-to-tooth surface angulation "closed angle"
face of curet should hug the tooth surface throughout the entire process
of insertion
, get ready zone for angulation for insertion of curets
middle third of crown at distofacial line angle
step 1 get ready zone
turn the toe of working-end toward the correct surface
get ready zone
out of line of fire - finger rest is never established directly above the tooth
surface being worked on
step 2 close the face
0º to 40º
face should hug the tooth
step 3 insert
gently insert below gingival margin
imagine the face sliding down the root surface
step 4 establish angulation
open face between 60 to 70º for root debridement stroke (shaving stroke)
moderate pressure
open face between 70º and 80º for calculus removal stroke from pressure
