2015 Questions Pt. 3 Flashcards
T/F
Parenteral bisphosphonates decrease orthodontic tooth movement and post-orthodontic relapse
Localized bisphosphonates are contraindicated
True
False
Amphetamines exert which adrenergic effects?
a. Dilated pupils
b. Constricted pupils
c. Dilated vasculature
d. Constricted vasculature
a. Dilated pupils
What is the correct ratio and order for chest compressions and rescue breathing
30 compressions - 2 breaths
Where do you place your hands for chest compressions
lower half of sternum
What scenarios require premedication
Band placement
Previous hx of infective endocarditis
If a patient is allergic to Amoxicillin, what is the 2nd choice
Clindamycin 600 mg
Amoxicillin - 2 grams
T/F
Gorlick found that 30% of ortho pts. have white spot lesions
White spot lesions go away after 2-3 months of good oral hygiene without heavy fluoride use/wait 2-3 months after debond to apply fluoride
False (50%)
False (Not heavy use, without heavy use is correct)
Which of the following is not increased from fluoride use?
a. pH
b. Size of hydroxyapatite crystal
c. Solubility of hydroxyapatite crystal
c. Solubility of hydroxyapatite crystal
What percentage of sodium fluoride should orthodontic patients rinse with daily?
0.05%
Fluoride prevents caries in developing teeth at what percentage?
20-40%
Also seen 20-55%
Define HIPAA
Health Insurance Portability and Accountability Act
You are performing an experiment to predict mandibular growth from 3 different initial ceph values
What statistical analysis should you use
Correlation
Which is not used in ABO discrepancy index?
FMA
When does the ABO score third molars?
When they are substituting for second molars
Which does not score DI points
Lower incisor <80
What are the ceph measurements in the ABO DI
ANB, IMPA, SN-GoGn
Wavelength of orthodontic curing light?
What is the wavelength that ortho resins are activated?
460-480 nm
Which are important for TAD primary stability
Cortical bone thickness and Diameter
T/F
Pilot holes increase TAD stability
True
T/F
Best place to place a TAD when protracting a mandibular molar is distal to the cuspid
True
Property of springback is related to?
Ability to be activated (exert clinically useful force when bent) beyond yield point
Highest coefficient of friction is found in what wire?
TMA > NiTi > SS
The ability of a wire to have high deflection but low force is due to?
Phase transformation
What type of wire delivers the most consistent type of force?
A-NiTi
Why does stress strain not affect load deflection of NiTi wire?
Phase transformation
A –> M
What is the flat part of the curve for NiTi called?
Phase transformation
What wire is best for continuous light forces?
A-NiTi
How is NiTi activated?
Austineitic –> Martensitic
Most important factor in leveling when picking size?
Load deflection
T/F
Pre-adjusted straightwire brackets guarantee optimal positioning of teeth
However, most cases require bends to optimally position a few teeth
False
True
TPA is least useful for:
Anchorage in AP
Which of the following is least effective in maintaining vertical?
a. Nance
b. TPA
c. High Pull Headgear
TPA
What complications can arise from a mandibular respositioning appliance for sleep apnea
Occlusal discrepancies and alterations
T/F
LLHA can successfully hold space for eruption of premolars and canines
It can also prevent eruption of lower incisors
True
True (permanent are more lingual)
What is the leeway space on top and bottom? mm amount
- 5 maxilla (per side)_
2. 5 mandible (per side)
T/F
68% of patients had resolution of crowding with LLHA
True
LLHA can correct how much crowding?
4-5 mm
LLHA intermolar width increased how much compared to controls?
1 mm
With VME, what do you see in concurrence?
Retrognathia/Class II
Primary action of lip bumper
Relieves incisor alignment
Twin block appliance therapy has what affects?
Dental and Skeletal mostly to achieve Class I
Incisal capping to reduce incisor flaring
Which of the following is true about Class II functional appliances
It opens the bite
Forsus has all of the following effects except for:
a. Distalize maxillary molars
b. Increase SNB
c. Decrease SNA
d. Mesialize mandibular molar
c. Decrease SNA
What percentage of Class II cases are fixed after Phase 1 treatment
75%
What sutures limit RPE
Zygomatic buttress
When using an RPE, what sutures are not affected?
Premaxillary
RPE expands where?
More anteriorly and inferiorly
For every 1 mm of intertooth expansion in the posterior, how much arch perimeter is gained with an RPE
0.7 mm premolar
Gingival recession is most common in orthodontic patients who undergo
Maxillary orthopedic expansion
How do you counteract the side effects of an upper intrusion arch on the molars?
High Pull HG with short outerbow and TPA
