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WorksheetsDr Vj
Total questions: 20
Worksheet time: 7mins
What is the mechanical advantages of lever principle ?
2.5
3
4
4.6
what is the mechanical advantage of wheel and axle principle ?
2.5
3.5
3
4.6
what is the mechanical advantage of wedge principle ?
3.6
2.5
4.6
4
By which principle these instruments works under ?
wheel and axle principle
lever principle
wedge principle
all the above
what is the principle shown ain this picture?
second order lever principle
first order lever principle
wedge principle
wheel and axle
For maxillary extraction of teeth ,what is the angle formed between maxillary occlusal plane with floor?
30
45
90
60
for extraction of maxillary molars the dental chair should be -----cm below the shoulder level of the operator ?
4 cm
16 cm
8 cm
12 cm
for the extraction of mandibular teeth the occlusal plane is -----?
parallel to the operator's hand
perpendicular to the floor
parallel to the floor
perpendicular to the operator's hand
for the extraction of mandibular first molar teeth the chair should be ----- cm below the level of operators elbow?
16 mm
12 cm
12 mm
16 cm
which is the position of right handed surgeon for the extraction of teeth in the 4th quadrant ?
right back position
left front position
right front position
9 'o' clock position
right front position is used by the right handed surgeon for the extraction of ------?
anterior mandibular teeth
maxillaary teeth
teeth of third quadrant
all the above
which one is not a role of opposite hand ?
compress socket
force application to the working hand
reflection of soft tissue
stabilization of patient head
which one is not an extraction movement?
labiolingual
buccolingual
lingualpalatal
buccopalatal
which one is not a part of elevator ?
head
blade
handle
shank
which one is the correct order of extraction of teeth in a quadrant ?
third molar, second molar , first molar, second premolar
third molar ,second molar, second premolar , first molar
third molar, first premolar, second premolar , second molar
third molar, second premolar, first premolar , first molar
apex elevator utilizes which principle?
lever principle
wheel and axle
pulley
wedge principle
the elevators can be used to advantage when :
the interdental bone is used as a fulcrum
the tooth to be extracted is isolated
multiple adjacent teeth are to be extracted
the adjacent tooth is not to be extrated
cowhorn forceps with two beak are specially designed to extract ?
mandibular molars
maxillary molars
maxillay first and second premolars
mandibular premolars
mainly elevators in exodontia works on the principle of :
lever class I and II
lever class I
lever class II
wheel and axle
winter cross bar elevators are designed for the removal of :
mandibular molar roots
mandibular incisor roots
mandibular canine roots
none of the above
