ortho MCQs Flashcards
anchorage may be reinforced by
a. using thinner archwires on fixed appliance
b. using a transpalatal arch with a fixed appliance
c. using thicker wire to construct springs on a removable appliance
d. increasing the number of teeth which require tipping movements
e. decreasing the number of teeth in the ‘anchor’ unit
b
fixed appliances are efficient at
a. correcting vertical skeletal discrepancies
b. correcting anterior crossbites
c. correct multiple tooth malpositions
d. treating malocclusions in the early mixed dentition
e. treating moderate to severe sagittal skeletal discrepancies
c
functional appliances are mainly used to
a. treat long face syndrome
b. correct sagittal discrepanacy in class II div 1 cases
c. correct multiple tooth malpositions
d. treat adults with no growth potential
e. correct sagittal discrepancy in class I cases
b
removable appliances are useful for
a, retraction of canines using bodily movement
b. correction of underbites
c. correction of rotations
d. maintain space
e. increasing overbites
d
which of the following may be used to assess the antero-posterior skeletal pattern clinically
a. molar relationship
b. mandibular length
c. incisor relationship (BSI)
d. maxillo-mandibular place angle (MMPA)
e. palpation of the skeletal bases
e.
which would represent moderate crowding?
a. 4-6mm
b. 2-6mm
c. 8-10mm
d. 3-5mm
e. 0-4mm
a
what is the defintion of class II div1 incisor relationship?
the lower incisor edges lie posterior to the cingulum plateau of the upper incisors, there is an increased overjet and the incisors are usually proclined
when measuring overjet clinically which of the following applies?
a. the pt should be in retruded contact position
b. pt frankfort manidbular plane angle (FMPA) should be vertical
c. the pt should be in intercuspal position
d. the URA should be in the pts mouth
e. the pt should be prone
which of the following can be used to assess the vertical skeletal pattern clincally?
a. Frankfort maxillary plane angles (FMxPA)
b. total anterior face height/upper anterior face heigh x100
c. lower anterior face height/upper anterior face height x100
d. frankfort mandibular planes angle (FMPA)
e. lower anterior face height + upper anterior face hieght x100
d
aesthetic component of IOTN is
a. fulfils the criteria of an ideal index
b. is of use in rating dental attractiveness
c. can only be used clinically on pts
d. is used to assess tx complexity
e. uses a series of 10 photos, with number 1 being least attractive arrangement of teeth
b
dental health component (DHC) of IOTN
a. subjective assessment
b. records the most favourable feature of malocclusion
c. can only be used on study models
d. is assessed using MOCDOO system
e. is an indicator f tx complexity
d
pt whose worse occlusal feature is a unilateral ectopic canine would score what IOTN DHC
a. 5a
b. 5i
c. 4a
d. 4h
e. 4i
b
the PAR index
a. assess 5 components of alignment
b. scores pre treatment study models only
c. stands for the Peer Assessment Rating guide
d. designed to assess tx difficulty from study models
e. assess the effect of orthodontic tx on the facial profile
f. has been method of assessing tx outcome for 30 years
c
when assigning the dental health component of IOTN
a. grades 3, 4, 5 are completely grouped together
b. once a grade of 3 has been found the process is complete
c. the pts views are paramount
d. the MOCDOO system is an aide memoire
e. an increase overjet of 12mm would be grade 5i
f. traumatic overbite would score a grade 4f
d
histological response for ‘light forces’ generated during orthodontic tx include which of following
a. apposition of osteoid on pressure side (osteoblasts)
b. resorption of the lamina dura from tension side (osteoclasts)
c. frontal resorption
d. undermining resorption
e. occlusion of nerves of PDL on pressure side
c
