lab quiz Flashcards
How many cutting edges does a scaler have?
two cutting edges per working end
How many cutting edges does a universal curet have?
two cutting edges per working end
how many cutting edges does a gracey curet have?
only one cutting edge per working end
What is the probing technique?
hold side of probe tip flat against the tooth surface, probe parallel to long axis of tooth for vertical insertion
slide probe along tooth surface vertically down to base of pocket (sulcus),
maintain contact to side of tooth
as probe is passed down side of tooth, rougness may be felt
count mm that show the probe on the gingival margin and subtract from total number
use walking stroke
Names of explorers
sickle or shepherds hook
Pigtail or cowhorn
how can you detect calculus other than with an explorer?
disclosing solution
what are the three parts of an instrument?
handle, shank, working end
Appropriate instrument grasp?
modified pen grasp
what is the difference in supragingival and subgingival scaling?
Supragingival calculus deposits are located coronal to the gingival margin, usually on the crowns of the teeth. they are used for removal of light deposits
Subgingival are located apical to the gingival margin and below the gumline
why do we perform an intraoral and extraoral exam?
to look for anything abnormal
when do we prefer a biopsy?
unusual lesion that cannot be identified with clinical certainty
any lesion that does not show evidence of healing in a 2 week time period
persistant, white, thick, hypekeratotic lesion and any mass that does not break thru the surface epithelium
whats the purpose of polishing?
To remove extrinsic stains
What is a pigtail explorer used for?
proximal surfaces for calculus, dental caries or margins of restorations
curved tips are applied opposite to tooth surface
ex. 3ML,3CH,2A
what is an orban type explorer used for?
assessment of anterior root surfaces and the facial and lingual surfaces of posterior teeth.. difficult to adapt to the line angles and proximal surfaces of post. teeth..
ex; 17, 20F, TU17
what is an shepherds hook explorer used for?
examining pits and fissures and supragingival smooth surfaces, and margins of restorations and sealants
What is a disclosing agent?
preparation in a liquir, tablet, or lozenge that contains a dye or other coloring agent. In dental hygiene, a disclosing agent is used to identify dental biofilm deposits for instruction, evaluation, and research.
Furcation probe?
Nabors probe
What instruments are used for supragingival calculus deposits?
sickle scalers, and curets
Where is the Nevi 1 sickle scaler used?
coronal surfaces of anterior teeth- sickle end
disc end is used on lingual surfaces of anterior teeth for supragingival use
What type of Nevi Sickle scaler is used for posterior teeth to remove med. to large deposits?
Nevi 4
This type of nevi sickle scaler is used on coronal surfaces of posterior teeth..
Nevi 2
where is the nevi 3 used?
coronal surfaces posterior teeth
where can universal curets be used?
supra or subgingival on crown and root surfaces on ant. or post. teeth
ex; barnhart, langer,
area specific curets?
designed specifically for a certain area in the mouth. example, gracey series
What gracey curets are used on all anterior teeth, tooth surfaces?
gracey 1 and 2
gracey 3 and 4
what are the gracey 5 and 6 curet used for?
ant. teeth all tooth surfacess
premolar teeth, all tooth surfaces
molar teeth, facial, lingual, mesial surfaces
what are the gracey 7 and 8, gracey 9 and 10 used for?
ant. teeth all surfaces
post. teeth all surfaces
post. teeth facial and lingual surfaces
what are the gracey 11 and 12 used for?
ant. teeth mesial and distal surfaces
post. teeth mesial only
post. teeth: fac, ling, and mesial
gracey 13 and 14 used for?
ant. teeth MD surfaces
post. teeth D surfaces
gracey 15 and 16?
post. teeth, fac, ling, mesial surfaces
gracey 17 and 18?
post. teeth, distal surfaces
where are sickle scalers used for excellent calculus removal?
proximal surfaces of anterior crowns and enamel surfaces apical to the contact areas of post. teeth
11/12 explorer used for?
assesment of root surfaces of ant. post. teeth
ex. ODU 11/12, AND 11/12 AF
what type of explorer is excellent for subgingival assessment of ant. teeth?
orban type such as TU17
when exploring post. teeth how should the explorer be?
lower shank parallel to distal surface
func. shank goes over tooth
