Exam 2 Flashcards
(40 cards)
What movement is made when a maxillary Hawley with an active finger spring is located lingual to a central incisors
Translation
Tipping??
Torqueing
Opening bite
tipping
The introduction of a coil into spring design serves to make a
smaller force for a given deflection
The forces that is occurring during mastication versus during orthodontics is different in that the forces of mastication are due to
Gingival fibers
Supraperiosteal fibers
Incompressibility of the fluid
A decreased amount of force
answer not given
Which of the following is true concerning optimum force
Different forces for different movements
Which is true concerning frontal resorption Due to light prolonged forces Due to heavy prolonged forces Occurs after 7-10 days Occurs after 4 hours
Due to light prolonged forces
Pure translation occurs without tipping, torqueing, or rotation if force is applied to
The center of resistance
The center of rotation
The apex of the root
The center of the bracket slot
The center of resistance
The type of movement that requires the most force is Tipping Translation Extrusion Intrusion
translation
The type of movement that requires the least force is Extrusion Intrusion Rotation Tipping
intrusion
The minimum amount of force application needed to have tooth movement is
4 hours
The mechanism of action of the bisphosphonates is to
Inhibit the osteoclast-mediated bone resorption`
The anchorage value is
roughly equal to its root surface
Which of the following is the least common side effect or orthodontic tooth movement
Root resorption
Tooth mobility
Devitilization of the moving tooth
Devitilization of the moving tooth
A tooth with periodontal disease can handle as much stress as the as tooth that is not involved with periodontal disease
True
False
false
Which of the following is a second order compensation:
- Thickness of bracket
- Adjustment of the faciolingual axial inclinations of the teeth
- The preangulation of brackets in the mesial-distal direction
The preangulation of brackets in the mesial-distal direction
If the maxillary central incisor is 4 mm from the incisal edge. How many mm from the incisal edge should the canine be placed
a- 3
b- 3.5
c- 4.5
4.5
Which of the following is not a property of nickel titanium memory wires
- Shape memory
- Super elasticity
- Exceptional Springiness
- Good formability
good formability
What is the initial archwire used for the alignment/leveling stage
0.014 superelastic NiTi
Class 3 elastics work by
- Distalizing and extruding the 1st maxillary molars
- Distalizing and intruding the 1st maxillary molars
- Mesializing and intruding the 1st maxillary molars
- Mesalizing and extruding the 1st maxillary molars?
Mesalizing and extruding the 1st maxillary molars?
Correcting the rotation of an upper molar mesially around the lingual root improves a
mild class 2
A patient with a class 3 molar relationship with mild to moderate severe crowding and mild/no skeletal discrepancy is solved with
- Extracting 4 PMs
- Extracting Upper 2nd PMs
answer not given
A removable appliance can be used to prevent tooth movement by holding off the lips and cheeks and other soft tissues
True
False
true
The most important reason a pano is taken after the end of stage 2 is to
Detect Supernumerary teeth
Detect 3rd incisor impactions
Determine the placement of the marginal ridges
Determine if tooth roots are parallel
determine if tooth roots are parallel
Before the bond for an occlusal case is removed, the dentist should ensure that there is enough space remaining for an implant placement
True
False
true
There is support that the idea that extracting third molars will prevent mandibular crowding
True
False
false
