Summer Mock Flashcards
All of the following are advantages of the indirect method of bonding brackets to a tooth over the direct method EXCEPT
less technique sensitive
which of the following are considered functional appliances
Frankel
Bionator
Clarks twin block
Herst
Activator
QUAD HELIX IS NOT
Headgear appliance is used for
both anchorage and traction
which of the following is not a fixed appliance
frankel appliance
when comparing stainless steel versus nickel titanium, stainless steel has a _______ modulus of elasticity and ________ resilience
higher , lower
which appliance is probably the most widely used today by orthodontist
edgewise
the hawley retainer is the most common in ortho because it can use the palate for anchorage
correct but not related
an active finger spring of a removable appliance usually touches the tooth with a point contact. what is the most likely type of tooth movement produced in this situation
tipping
prior to bonding _____is used as an etching agent. Prior to placing bands, _______ is used as an etching agent
35-50% unbuffed phosphoric acid; nothing
in a maxillary permanent incisor crossbite, in order to treat this condition properly the dentist should do what
correct the condition immediate with a simple appliance
ortho forces can be treated as math vectors
forces produce either translation, rotation, or a combination of translation and rotation, depending upon the relationship of the line of action of the force to the center of resistence
both are true
what can cause extrusion of the maxillary first molar which can cause an open bite
cervical pull headgear
which condition is appropriately treated at an early age
posterior crossbite with a functional shift
displaced teeth related to functional shifts occur in which of the following situations
posterior crossbite
anterior crossbite
maxillary expansion is often done to correct crossbites.
tongue thrusting often causes an anterior open bite
both are true
what is not a classic symptom of sucking habbit
expanded maxillary arch
an anterior crossbite should be corrected as soon as it is detected because it is difficult to retain the corrected occlusion
correct but unrelated
a patient’s SNA angle is 78. the SNB is 76. this tells us that the maxilla is ______, the mandible is_____, and the skeletal profile is ______
retrognathic, retrognathic, class I
a poor man’s ceph is performed via
facial profile anaylsis
what does not correlate with a steep mandibular plane
Class III malocclusion
what is needed so that the soft tissues are clearly visible on a lateral cephalometric radiograph
soft tissue shield
identify the frankfurt-horizontal plane and the numbered point it uses for its origin
a line through porion and orbitale.
in predicting the time of the pubertal growth, the ortho can get the most valuable info from
wrist hand
in a series of extraction case, what is the correct order of tooth removal
p-canine, p-first molar, perm first premolar
what is the correct sequence of uprighting a tooth
separate
band
upright
complete crown lengthening
complete crown prep
at the age of 9, young jimmy needs his tooth #30 pulled due to caries. What is the proper space maintenance
no space maintenance
_____ describes movement of the crown in one direction while the root tip is displaces in the opposite direction
tipping
_______ is controlled root movement while the crown in held relatively stable
torque
A post-ortho circumfrential supracrestal fibrotomy is performed, thus reducing the tendency of rotated tooth relapse
both are true
which are part of the rationale for retention in ortho
all
the cranial vault is made up of a number of flat bones that are formed by _______, ______ cartilagenous precursors
intramembraneous bone formation; without
once bone is formed, it grows by
appositional growth
cartilage differs from bone in that cartilage can increase size by
interstitial growth
the sole function of the alveolar process is to support the teeth, which is why it resorbs if a permanent tooth is extracted
both are correct and related
bone deposition in the ____ region is responsible for the lengthening of the maxillary arch
tuberosity
An 18 year old patient presents back to you complaining of crowding of his lower anterior incisors. It is because of
late mandibular growth
what percentage of 6-year old children have a median maxillary diastema
98%
the length of the mandibular arch is longer than the maxillary arch
the difference is only about 2mm
false
true
the most commonly impacted tooth is the mandibular canine.
the longer a tooth has been impacted, the more likely it is to be ankylosed
false, true
if a permanent maxillar first molar has errupted ectopically against the distal root surface of a primary second molar, what is the tx of choice
a brass wire place between the primary and second molar and permanent first molar
the time required to upright a molar can very from
the time required to stabilize the molar can vary from
6/12 months
2/6 months
which is NOT are signs of incipient malocclusion
larger than normal primary teeth
a patient presents with long face syndrome based on webDDS. the man has obvious mouth breathing. what is your immediate thought
skeletal open bite
angle class I represents % of the population while class II represents
70; 25
what ceph measurement is characteristic in class I
ANB <4 degrees
a concave profile is associated with a class III occlusion
It is also termed retrognathic
true
false
which of the following can be used to describe a class II malocclusion
overbite or retrognathism
which of the following is least common
Class III
the existence of a forward shift of the mandible during closure to avoid incisor interference is found in
pseudo class III
the most common cause of class I malocclusion is
discrepancy between tooth size and supporting bone
which of the following is/are general causes of failure of tooth erruption or delayed erruption
hereditary gingival fibromatosis
down syndrome
rickets
primate space is located between the lateral incisors and canines in the max
in the mand, it is located between k9 and 1st molar
which of the following primary molar relationships can you expect to result in a class II relationship in the permanent dentition
distal step
a PA of primary tooth M shows tooth #22 overlapping half of the root. the patient is not in the chairr. what would you presume
22 is errupting facially
leeway space is calculated difference between primary and permanent tooth size
there is typically more leeway space in the max arch
first true
second false
6-year old patient and her mother present to your office. Her moms chief complaint is “my kids overtbite makes her look like bugs bunny. what is wrong with the moms statement
she is mixing up overbite and over jet
which of the following teeth are required for a dentist to perform a moyers mixed dentition anaylsis
mandibular incisors
which of the following is false concerning dentition anaylsis?
anaylsis for each quadrant
