2018 Questions pt. 1 Flashcards
What does not go through the Foramen Lacerum?
Trigeminal Nerve
What structures are associated with and pass through the Foramen Lacerum?
Greater Petrosal Nerve joins with the Deep Petrosal Nerve, One terminal branch of the Ascending Pharyngeal Artery (external carotid branch), Internal Carotid artery exits
What cranial bones surround the Foramen Lacerum?
Petrous portion of the Temporal bone, Spenhoid bone
Which cranial fossa is the Foramen Lacerum located?
Middle Cranial Fossa
Which muscle elevates the tongue?
Styloglossus and possibley palatoglossus (elevates posterior aspect of tongue)
What muscles attaches to the coronoid process of the mandible?
Temporalis Muscle (Temporal) and Masseter Muscle
For every 1 mm of proclination of lower incisors, how much degree changed is noted on the IMPA
1mm tipping = 2.5-3.3 mm (answer to that question is 3)
**Which cephalometric angle is not changed as the cranial base steepens?
SNA, SNB, SN-MP, FMIA, FMA
1 ppm Fluoride in the water, what percentage of caries reduction occurs?
20-55%
When performing a canine substitution case, what aspect of the patient doesn’t matter?
Height of Central Incisors
In class I occlusion, what does the DL cusp of the maxillary first molar occlude with?
Distal Marginal Ridge of the Mandibular First Molar
When the diameter of the archwire is doubled (2x), what happenes to the strength of the wire
It goes up 8x
Taste for posterior 1/3 of the tongue comes from what nerve
CN IX
Glossopharyngeal
Which nerve does not innervate the tongue
Vagus
Which development craniofacial syndrome does not show delayed tooth eruption?
Hemifacial Microsomia
T/F The mandibular plane angle does not decrease with age
False, it does decrease with age
When a patient shows bilateral cleft lip, what embryological features of development fail to fuse?
the Maxillary and median nasal processes
Most common clinical feature of Apert Syndrome
Syndactyl
Also mental deficit
What is the inheritance of Apert Syndrome?
Autosomal dominant
What trimester does Hemifacial microsomia occur in?
First Trimester
Will be a T/F question
Describe the effect on the condyle in hemifacial microsomia
Condyle may vary from thin, flat ramus with condyle, to complete aplasia of these structures
(Will be a T/F question)
How is Dentinogenesis Imperfecta inherited?
Autosomal Dominant
What is the prevalence of Dentinogenesis Imperfecta
1/6000-8000
Does Dentinogenesis Imperfecta affect only permanent dentition?
No, affects both dentitions
Which cell is not in the hyalinization zone?
PMN or Osteoclasts
Not sure which
What does the frontonasal process not contribute to?
a. Vermilion Border
b. Ala
c. Maxillary Process
d. Philtrum
c. Maxillary Process
Bolton point is associated with what cephalometric landmark
Occipital condyle
Which part of the mandible is associated with secondary cartilage for growth
Mandibular Condyle
When does the right/left mandible fuse
at 9 months of age
??Question: Something about CR
Options with Anterior/Superior or no consensus
Document says to go with no consensus
How do we know how mandibular growth works?
Through implant studies
What causes translational growth (Moss articles)
Capsular matrix
What is not a primary growth site?
Synostosis
According to the functional matrix theory, what causes sutural growth?
soft tissues
What bone allows for accomodation of the orbit
Lacrimal
List most common missing teeth in order
3rd Molars (20%), Mandibular 2nd premolars (3.4%), maxillary lateral incisors (2.2%), maxillary 2nd premolars This was a T/F questions with True being correct
Wire least likely to give palatal root torque
NiTi
HPHG is above the center of rotation, what is the affect dentally
Distal Root Tip (DRT) and Intrusion
Which is true regarding Twin Block
a. Increased horizontal growth in long term
b. skeletal vertical changes
c. dentoalvolar and skeletal alvoeolar changes
d. acrylic helps with less proclination
Both C and D
Dentoalveolar and skeletal alveolar changes
&
Acrylic helps with less proclination
What is an alternative to heat sterilization?
Vaporized H2O2
Decreased voxel size results in what?
Increased number of photons and more radiation
International commission on radiology for population uses what radiation measurement
Equivalent dose OR effective dose.
Not sure
Define effective dose
For the whole body
It is the addition of the equivalent doses for all organs, each adjusted for sensitivity of the organ to radiation
Define equivalent dose
for individual organs
based on absorbed dose to an organ, adjusted to account for the effectiveness type of the type of radiation
Define absorbed dose
Amount of energy deposited by radiation in a mass
When doing canine substitution, what do you not do to the canine to make it look like a lateral?
Adjust the distal marginal ridge
What is the percentage of Class II patients that are mandibular retrognathic?
75%
What is the width/height ratio of a central incisor?
80%
What is the percentage of fluoride in mouthwash?
0.05%
T/F question about white spot lesions
What percentage of patients have decalcifications post treatment?
50%
Question says 30% and is false.
What is the most common error when taking a ceph
Magnification error - patient to anode distance or film to patient distance
What is the most common problem collecting analog ceph measurement data
identification of landmarks
Patient has open lock, shifts to L and pops on the L side, what does the patient have and on which side?
Posterior displacement on L side
What is NOT the biological function of paranasal sinuses?
a. Increase resonance of voice
b. Buffer for facial trauma
c. Insulating sensitive structures like dental roots from temperature fluctuations
d. Decrease weight of head
e. Something about breathing
Something about breathing (haha very detailed)
What muscles are not involved in smiling?
Orbicularis Oris & Procerus
What is responsible for the initiation of puberty?
Hypothalamus
Which bone of the cranial base undergoes both endochondral and intramembranous growth
Sphenoid bone
Which type of medication is contraindicated for ortho treatment and what mode of delivery?
Parenteral bisphosphanates
Can Osteoradionecrosis be viewed with radiographs
Yes
How do Bisphosphanates affect tooth movement?
It decreases tooth movement
T/F, Bisphosphanates will accumulate in hydroxyapatite
True
In CPR, how many compressions per minute?
at least 100
Where do compressions occur in a child?
lower half of the sternum
What affects TAD stability
Cortical Bone Thickness
Which of the follow is not true about the MARA appliance:
A. Significant distalization of maxillary molars
B. Slight increase in mandibular length
C. Not as good headgear effect as HERBST
D. Proclines the lower incisors more than HERBST
A. Significant distalization of maxillary molars
What is the chromium/nickel composition in SS archwires?
18% Chromium
8% Nickel
T/F, Stainless Steel archwires have a high modulus of elasticity?
Define “Modulus of Elasticity”
F, It has a low modulus of elasticity. This means it is easily deformed
Modulus of Elasticity is the tendency of an object to deform when forces are applied
What is attributed to a low change in stress, but high change in strain on the stress/strain curve
Phase transformation
Austenitic - Martensitic NiTi wires.
Wires that undergo a phase transformation are called Austenitic NiTi wires while those already stabalized in the final phase are called Martensitic NiTi wires
What would cause recession in adults?
Either Poor OH or Orthopedic expansion but most likely Orthopedic expansion is the answer
What is the Deviation Angle in the bracket?
It is the same as SLOP.
Defined as rotation movement of the rectangular archwire from its passive position to a position where two opposite edges of the archwire contact two opposite walls of the bracket slot
Is the Intraoral Vertical Ramus Osteotomy (IVRO) setback surgery in Class III patients also beneficial in relief of undesirable TMJ symptoms?
Yes, it is good
Do not rigid fixate
A questions about what a FORSUS does not do
One answer is, it does not affect SNA.
If that is not an option, intrusion of Maxillary molars
How long does the Regional Acceleratory Phenomenom last?
2-4 months
What causes root resorption
High forces, Duration of treatment
What is correlated with Root Resorption
Previous History of RR. High intermittent forces was listed as an option too but I think Previous Hx is right
Where is the Center of Rotation in tipping of the Mx Incisors
Apical 1/3
In a dental open bite, where are Mx incisors compared to location of stomion superioris
Superior
A question about anterior open bite…
Long mandibular corpus
At what week period does the tongue form?
4 weeks
When does the soft palate develop
8-12 weeks
What is not generally an issue when performing Distraction Osteogenesis for the midsymphisis
TMD
What is the percentage size of the lateral compared to central incisor?
60%
Standard of care for malpractice is determined by what entity
Courts
What percentage of patients with high condylar fracture have normal growth in mandible
75%
What treatment to a root has a higher chance of fracture?
CaOH apexification
