2015 Questions Pt. 2 Flashcards
Fastest somatic growth occurs when?
conception to birth
What sinus is enlarged in Acromegaly?
Frontal sinus
What is not associated with Apert Syndrome?
a. Absence of infraorbital ridge
b. Dolichocephaly
c. Hypoplastic infraorbital ridge
c. Hypoplastic infraorbital ridge
What is not associated with Crouzon?
a. Syndactyly
b. Cleft lip/palate
c. Fusion of sutures at 7-8 years old
c. Fusion of sutures at 7-8 years old
What does not have delayed tooth eruption?
Either Hemifacial Microsomia or Crouzon
Cleft Lip is not associated with what common craniofacial anomaly?
Pierre Robin
Wormian bones are found in what craniofacial anomaly
Cleidocranial dysostois
T/F
Hep C does not have a vaccine
The most common bloodborne pathogen in the US is Hep B
T
False, most common is Hep C
What is importance of HBc?
Anti-HBc = total hepatitis B core antibody
Diagnosis of recent or past hepatitis B infection
Appears shortly after symptoms
What is significant about Ameloblastomas?
The polycystic type is more common (86%) and harder to treat (50-90% occurence)
How do you NOT treat Ameloblastoma?
Radical dissection
- Polycystic: marginal/block resection
- Unicystic: Enucleate and curettage
What is the most common tumor of odontogenic origin?
Odontoma
What is the most common place for a sialolith?
Submandibular gland
What is the most common salivary gland tumor?
Pleomorphic adenoma
T/F
Sterilization will kill all viruses, bacteria, and spores
Disinfection will kill everything but spores
True
True
What is location of condyle in CR?
Most superior and anterior
Finishing a case with less than 2 mm shift from CR-CO and you want to have coincident midlines.
Occlusal equilibration
Patient has a lateral shift, how do you clinically diagnose?
Check midlines
T/F
Occlusal interferences cause bruxism
Bruxism is not associated with anxiety and stress.
False
False
The most conservative treatment for TMD is
Occlusal splint therapy or flat plane occlusal splint
How do you measure maximum opening?
Incisal edge to edge + overbite
If a patient is undergoing splint therapy, are these statements true:
Weaning off the splint should start at 5 months
Stop wearing the splint after 3 months
False, 3 months
True, 3 months
Patient with an open lock and click on the left side.
Posterior displaced disk on left side
Patient with limited opening. What is happened?
CLosed lock - Anterior disk displacement. Is there sound? no sound = without reduction, with sound = with reduction
What is restricted in a patient with a closed lock?
Limited lateral movement toward unaffected side. There is deviation toward affected side upon opening.
if asking what is false, may have answer like: No deviation on opening
T/F
Internal disc derangement = anterior disc displacement
true
A patient has ADD without reduction on the right side. Explain what will happen with the mandible
It will deviate to the right on opening. It won’t be able to move laterally to the left (unaffected side)
Most common cause of TMD
Parafunction
If a patient has disk displacement. What would you use to correct it?
Flat plane occlusal splint
T/F
TMD is commonly found in the 15-25 year old age group
True (18-35)
The articular surface of the TMJ covered with what tisssue?
Fibrocartilage
T/F
CBCT gives better image than Medical CT
False
Which of the following has the most radiation when imaging the TMJ
Tech-99
What radiologic technique is used for detecting active growth?
Tech-99
Best way to monitor and evaluate through radiograph condylar hyperplasia
Tech-99
What radiographic procedure helps eval perforations of the articular disk?
Arthrography
What is the best type of imaging to view an arthritic lesion in TMJ
CT
MRI if it’s about the ligament/tissue
Smaller voxels have more radiation, why?
More photons
Digital x-ray is better than film except?
Increased resolution
The effects of ionizing radiation include all except:
Equal effect all tissue.
T/F
Equivalent dose does not take into consideration the organ being irradiated
False, It does
International commission of radiology (ICRP) uses what?
Equivalent dose
When trying to compile data, from multiple x-ray lateral cephs, the most common error is:
Poor landmark identification
0.4 voxel size is better in showing what?
Better at showing bone height over bone thickness
What is most common error when taking a ceph:
a. Patient head position to anode
b. Midsagittal plane to film distance
c. Vertical head position
a. Patient head position to anode
Who first brought cephalometrics to orthodontics?
Broadbent
What is the Opisthion?
The most posterior point of the foramen magnum
Which of the following is not stable to superimpose on?
a. Occiput
b. Nasion
c. Planum sphenoidum
b. Nasion
What are the guidelines for ABO superimposition of the mandible
Register on the internal cortical outline of symphysis and best fit on mandibular canal
