Scalpales and mylar strips are classified into what type of instruments:
Instruments used for removal of tooth substance and restoratives
Instruments used for isolation
Instruments used for finishing and polishing
Instruments used for condensation and packing
----------------- Are function(s) of a periodontal probe :
Measure the depth of periodontal pocket
Feel the tooth surfaces for defects and/ or irregularities
Determine the features and dimensions of restorations
Both answers (a) and(c)
Rubber impregmented cones (inverted cones) are used for:
a mouth mirror that doesn’t produce double images and recommended for clarity vision :
silvered on the outer side
both (b) and (c)
arrange inorder the following instruments(tools) depending on the energy utilized:
All are types of explorers except:
Instrument nomenclature includes except:
Number of angles
number of bevels
what is the importance of having the working part at an angle to the central axis of the shaft:
to have a significant design
to facilitate access to different areas of the teeth
to differentiate between right and left instruments
to suit the tooth depth
bi-beveled instruments are constricted on :
hatchets and straight chisels
if the cutting edge is was away from the operator , this indicates that the instrument is:
on mesial aspect
distal and right instrument
fill in the blanks<br />
before we make a restoration we place a (an) articulating forceps to mark the contacts of teeth in opposing arches during closure.
The shaft should be serrated or smooth knurled to avoid sliping from the operater’s hand.
A single ring on a shaft indicates a right instrument and a double ring on a shank indicates the presence of a reverse instrument (mesial or distal)
This instrument is easy to replace and constricted on mirrors and condencors , those instruments are called cone-socket instruments .
Instruments with 2 or more angles in the shank on one plane are described as single-planned instruments.
Quiz 2<br />Dental Instruments<br />Lec 2<br />
3600450329565A pine leaf-like instrument used for shaping the restoration according to teeth land marks is:
Cleioide- discoid excavator
A device where we insert an amalgam capsule to produce a thick smooth amalgam paste:
An instrument used to hold the matrices (metal bands or strips) firmly in place around a tooth temporarily while the filling material is being packed into place to impart more desirable contour to restorations.
(Hint: to take the surrounding shape of the tooth (example marginal ridges) and make it exactly the same as the original one with carving).
Instruments with cutting edges like a single beveled hatchet , but makes an angle of 90 or 85 degrees for mesial and distal aspects:
Gingival marginal trimmers (GMT)
Instrument used after carving ,has two different tips, used to fabricate deep fissures on occlusal surface:
Put in order the following process of amalgam restorations:
Use an amalgam carver to carve(shape) the occlusal surface for normal jaws closure.
Put an amalgam capsule in the amalgamator and place the product in an amalgam well.
Use an amalgam carrier to put in the amalgam, and then apply in the cavity.
With an appropriate amalgam condencer , condence the amalgam restoration neatly into the cavity .
Use a burnisher to create the original tooth fissures on the occlusal surface .
What does the last number in an instrument formula indicate:
Width of the bevel
Length of the blade
Angle between the blade and the long axsis of the shaft
Diameter of the shaft
Which instrument(s) contain 4 figures in the instrument formula:
Explorers and probes
Gingival marginal trimmers and angle formers
cleioide- discoid excavators
specialized chisels used to shape internal dentine walls and for planning enamel rods of cervical cavities of posterior teeth:
fill in the blanks:<br />
applicators are instruments used for carrying and applying sensitive materials to the deepest areas of the cavities.
The interproximal carver is for carving proximal amalgam surfaces near interproximal contact areas.
For a 4 figure instrument the second number indicates the edge of the blade at an angle other than 90 degrees to the blade
The angle between the edge of the blade and the shaft is 95 degrees for mesial aspect and
80 Degrees for distal aspect .
The main use of excavators is to scoop out caries
Good luck for u all <br /> <br />Done by: Rasha Shehab<br />