123 Questions Flashcards
What is true about light and chemical cured?
There is no significant difference in failure rates of visible and chemical cured
T/F
- 1mm anterior slide is okay
- 1 mm lateral slide is okay
- True
- False
What does not change when cranial base steepens?
FMA
What is not an indication for early treatment?
Consolidate anterior spacing
What is not associated with hyperdivergent anterior open bite?
Long mandibular corpus length
True/False
- If a patient has TMD, IVRO is a good choice.
- Rigid splinting recommended.
- True
- False - IVRO requires intermaxillary fixation
Are TMD and long term condyle problems an issue with mandibular mid-symphyseal distraction osteogenesis?
No
What can help prevent labially impacted canines?
RME, HG, and EXT of primary canines
What is the best indicator of impacted canine?
Absence of canine bulge at age 9-11
What is true of the effect of forces on root resorption?
Heavy forces cause more root resorption than light forces
What is the primary reason for external apical root resorption?
Prior history of root resorption
Patient is hyperdivergent anterior open bite with maxillary excess. Best way to treat?
TADs to intrude molars
What has sutural growth (intramembranous), replacement of cartilage (endochondral), and resorption/apposition?
MMOST - Mandible, Malleus, Occipital, Sphenoid, Temporal?
What is not true about palatally impacted canines?
Most likely due to primary canines being extracted early
What percentage of flush terminal plane goes to Class II?
45% goes to class II, 55% to Class I
What is not an effect of opioid abuse?
Pupil dilation - They get pupil constriction
True/False
- Parenteral bisphosphonates decrease OTM and prevent relapse
- Work by binding to hydroxyapatite
- True
- True
Where does CN7 exit?
Stylomastoid foramen
What is true about human growth hormone?
Mandible grows more than maxilla, but both grow
Effects of Herbst?
- Distalize max molars
- Distal tipping max molars
- Mesial movement of mandibular molars
- NOT decrease occlusal plane (STEEPENS)
CL/P have hard time with speech because…
CL/P have velopharyngeal insufficiency, causing hypernasality
What does increasing OP to SN do?
Decrease Wits - Wits gets more negative as you rotate the occlusal plane CW
What are indications of closed lock?
- No joint sounds
- Limited opening
- Pain when forced open
- NOT no deviation during opening - closed lock has deviation to ipsilateral side on opening
What is true when placing Maryland Bridge?
Best perpendicular to occlusal plane
What to do to maintain ridge in missing U2 cases?
Let canine erupt into U2 spot then distalize later
How much space to leave for U2 buildup?
Leave 2/3 distal and 1/3 mesial
What do you NOT do for canine sub?
Adjust distal marginal ridge
What is not diagnostic criteria for canine sub?
Height of central incisors
What do you not find in hyalinized areas?
Osteoclasts
True/False
- Ratio of SS is 18% chromium, 8% nickel
- SS has low modulus of elasticity
- True
- False
What doesn’t cause black triangles?
Root convergence
What is TAD success?
Vector amount, vector direction, bone quality
What is most important factor for primary stability?
Cortical bone thickness
True/False
- CBCT is best for the smallest FOV possible
- Radiation affects all patients the same
- True
- False
CBCT accuracy depends on…
Voxel size
CBCT 0.4mm voxel size is good for?
Neither bone height nor thickness
Does intrusion lead to more support of the root?
No
What is the standard of care?
Court rulings
What is used to assess the potential for long term effects that might occur in the future?
Effective dose
What is used to assess how much biological damage is expected from the absorbed dose?
Equivalent dose
What is used to assess the potential for biochemical changes in specific tissues?
Absorbed dose
What is the effect of deviation angle (play or slop in wire in bracket) on torque?
DOES affect torque
What causes translation?
Capsular
1mm proclination is how many degrees?
3 degrees?
What is the main effect of lip bumper?
Proclination of incisors
What do you NOT do for external invasive cervical root resorption?
Monitor annually
Which archform is least common?
Square
Limitation of SARPE?
Coronoid process
What is not an etiology of TMD?
Posture
T/F Occlusal adjustments are not recommended for TMD?
True
What is best for patient with perio problems?
Clear aligners
What is most radiation when imaging TMJ?
Tech99
What is best imaging for DJD?
CBCT
True/False
- Less than 5mm is best for papilla
- Greater than 6mm, 77% have papilla
- True
- False (56%)
MARA vs Herbst?
- MARA does not procline lower incisors more than Herbst
- MARA had greater increase in long term mandibular length (1mm/year) vs Herbst
- Herbst had the greatest maxillary restriction
- MARA decreases SNA and SNB
- Both steepen occlusal plane and decrease Wits
What are the effects of the Twin Block?
- Dental and skeletal
- Cap incisors to prevent proclination?
True/False
- You must use Pano before IPR
- Distal has more enamel than mesial of tooth
- False - Periapical
- True
Elastics are made of….
Polyurethane
Main bacteria in juvenile periodontitis
AA
What is not seen in Fibrous Dysplasia (but is seen in Pagets)?
Pre-malignant transformation
What is not true of class II div II?
More common in women
(More common in men?)
What does NOT innervate the tongue?
IA nerve
Where to put hands for kids for CPR?
Lower half of sternum
How many compressions for CPR?
100 beats/min
What is not true of OKC?
Most common in posterior maxilla
(Most common in posterior MANDIBLE)
Bone loss in perio is due to…
Reduction in osteoblasts
What imaging is best for disc perforation?
Arthrography
Percent of kids with condyle fracture and normal growth?
75%
What did Edward Angle not invent?
Labiolingual
(PEER - pin/tube, e-arch, edgewise, ribbon arch)
What forms premaxilla and primary palate?
Medial nasal process
Which disease is most easily transmissible?
Hep C
What does not happen in transition for primary to permanent?
Max canines move distally into primate space
(MESIALLY)
What does Forsus not effect?
SNB
CL/P formation in which stage?
4
Which sinuses do not help in breathing?
Paranasal sinuses
What percent of Class II is due to mandibular retrognathia?
75%
_________ is for when you want to predict a continuous dependent variable from a number of independent variables.
Regression
How does the chin remodel?
Deposition on external of lingual cortex
What are the features of Aperts?
SAM - syndactyl, autosomal dominant, mental retardation
What has Wormian bones?
CHARPOD
Cleidocranial dysplasia, hypothyroid, hypophosphatase, Apert’s, Rickett’s, Pyncnodysostosis, osteogenesis imperfecta, downs
True/False
- DI 1/8000
- Affects only permanent
- True
- False
T/F
Crouzons fuse at 7-8
False
How long is RAP effect?
4 months
True/False
- Condylar growth more than sum of mad molar growth
- Mand plane increase with growth
- True
- False - decreases with growth
Worst wire for torqueing?
A-NiTi
Force for protraction facemask?
450g below OP?
Pt opens, gets stuck to left, hears pop, able to close
Posterior disc displacement on left
True/False
- SARPE more stable than 3 piece
- Down fracture needed for SARPE
- True
- False
What to use for heat sensitive?
Vaporized H2O2
Muscles that don’t elevate hyoid
Omohyoid
Features of Lichen Planus?
open sores, autoimmune, wickham’s striae, graft vs host disease
Most rapid somatic growth?
Conception to birth
T/F
- 60% of saliva comes from parotid
False (20%)
Not true of archform
Mandible based on maxilla
Not a primary growth site
Synostosis
True/False
- Early treatment of skeletal open bite in early mixed dentition is indicated
- It is the period that will result in most skeletal changes
- True
- True
True/False
- Important to start facemask in early mixed dentition
- In order to maximize skeletal changes
- True
- True
Not affected in RPE
Premaxilla
Stress same but strain increases
Phase transformation
How much space for lateral implant compared to central incisor?
75%?
Puberty?
Hypothalamus
PDL fibers are….
Inelastic
Excessive vertical nasomaxillary growth leads to…
Mand retrognathia
Bone responsible for complex growth of orbit?
Lacrimal
What is not used in smiling?
Procerus & Orbicularis oris
Most anterior inferior point max alveolus?
Prosthion
Bjork all but in an average growing patient
Deposition of bone on inferior surface of ramus, below the angle
True/False
- 91% is normal for Bolton for 6-6
- 77% is normal for Bolton 3-3
- True
- True
First thing to do when you see unilateral xbite but no shift clinically detected
Flat splint
Functional matrix?
Soft tissue
Is CBCT fan shaped?
No, CT?
Phase transformation from A to M NiTi is…
Thermally induced
Best way to treat 1 wall defect
Extrude and occlusal equilibrate
TPA for AP anchorage?
No
Decrease voxel size?
More photons for better image quality
Higher quality, more radiation
During nonworking, which cusp inclines are most likely involved
Buccal inclines of mandibular cusps
True/False
3mm implant adjacent to natural tooth will cause papilla formation problems
False
Less than 1mm implant to natural tooth. What will happen?
Inadequate papilla will form
What type of bone forms right after or beginning of ortho?
Woven bone
HPHG - line of action above center or resistance
Distal root tipping
Asymmetric HG
Place longer outer bow on Class II side
Does mandible follow maxillary archform ?
No
