MD Orthodontist Assistant Exam 60 Practice
Questions & Correct Detailed Answers Update
New Solution
What is one common requirement of all archwire materials? - ANSWER ✔ - All archwire must resist
deforming when pressure is applied
Define tensile strength - ANSWER ✔ - Amount of stress archwire can resist before breaking
Define working range - ANSWER ✔ - Distance wire can be deflected before becoming distorted
Define resiliency - ANSWER ✔ - Ability of wire to spring back to its original form after being bent
Briefly describe what happens during the leveling stage of treatment - ANSWER ✔ - Stage where you align
teeth in the arch, in relation to the rest of the arch
Which wire is known as memory wire - ANSWER ✔ - Nickel titanium
The nickel titanium alloy was originally research for heat resistant material for - ANSWER ✔ - Missile nose
cones
Who researched the nickel titanium alloy for orthodontic use - ANSWER ✔ - Dr. George Andreason
What are the three advantages of using nickel titanium archwire - ANSWER ✔ - 1. Fewer changes
2. Shortens time to accomplish rotations
3. Less chair time
How is coaxial wire manufactured - ANSWER ✔ - Wrapping five or six thin stainless steel wires around a
solid central wire
, Describe the procedure used in cases with severe rotations to prevent relapse - ANSWER ✔ -
Gingivectomy; stripping the transseptal fibers no longer being able to return to its original position done
by a periodontist
What are Transseptal Fibers? - ANSWER ✔ - from the cervical area of one tooth across to an adjacent
tooth (on the mesial or distal only) to provide resistance to separation of teeth
Listen to different stages of treatment where eight braided wire can be used - ANSWER ✔ - 1. Leveling-
early placement for torque control
2. Finishing- used with vertical elastic to allow teeth to settle at desired occlusion
What are the most common around stainless steel wire sizes? - ANSWER ✔ - .014 to .0215
Why are round stainless steel wire is used In the intermediate stages of treatment - ANSWER ✔ - They can
continuously develop arch form, close spaces correct rotations and open bite
Rectangular stainless steel wire is also referred to as (2) - ANSWER ✔ - Edge wire or working wire
Rectangular wires are used in the final treatment stages to (2) - ANSWER ✔ - Torque and accurately
position the teeth
List the seven directions a tooth can be moved - ANSWER ✔ - mesially, distally, lingually, facially, gingivally,
occlusally, and rotated on its axis
What are the four directional forces used in orthodontics? - ANSWER ✔ - Tipping, Torquing, bodily
movements and rotation
What are the three bends used in the Standard edgewise appliance - ANSWER ✔ - First, second and third
What does first order bends do to the teeth - ANSWER ✔ - Intrude and extrude teeth vertically these
bends also move labiolongually to achieve correct in and out tooth position
Questions & Correct Detailed Answers Update
New Solution
What is one common requirement of all archwire materials? - ANSWER ✔ - All archwire must resist
deforming when pressure is applied
Define tensile strength - ANSWER ✔ - Amount of stress archwire can resist before breaking
Define working range - ANSWER ✔ - Distance wire can be deflected before becoming distorted
Define resiliency - ANSWER ✔ - Ability of wire to spring back to its original form after being bent
Briefly describe what happens during the leveling stage of treatment - ANSWER ✔ - Stage where you align
teeth in the arch, in relation to the rest of the arch
Which wire is known as memory wire - ANSWER ✔ - Nickel titanium
The nickel titanium alloy was originally research for heat resistant material for - ANSWER ✔ - Missile nose
cones
Who researched the nickel titanium alloy for orthodontic use - ANSWER ✔ - Dr. George Andreason
What are the three advantages of using nickel titanium archwire - ANSWER ✔ - 1. Fewer changes
2. Shortens time to accomplish rotations
3. Less chair time
How is coaxial wire manufactured - ANSWER ✔ - Wrapping five or six thin stainless steel wires around a
solid central wire
, Describe the procedure used in cases with severe rotations to prevent relapse - ANSWER ✔ -
Gingivectomy; stripping the transseptal fibers no longer being able to return to its original position done
by a periodontist
What are Transseptal Fibers? - ANSWER ✔ - from the cervical area of one tooth across to an adjacent
tooth (on the mesial or distal only) to provide resistance to separation of teeth
Listen to different stages of treatment where eight braided wire can be used - ANSWER ✔ - 1. Leveling-
early placement for torque control
2. Finishing- used with vertical elastic to allow teeth to settle at desired occlusion
What are the most common around stainless steel wire sizes? - ANSWER ✔ - .014 to .0215
Why are round stainless steel wire is used In the intermediate stages of treatment - ANSWER ✔ - They can
continuously develop arch form, close spaces correct rotations and open bite
Rectangular stainless steel wire is also referred to as (2) - ANSWER ✔ - Edge wire or working wire
Rectangular wires are used in the final treatment stages to (2) - ANSWER ✔ - Torque and accurately
position the teeth
List the seven directions a tooth can be moved - ANSWER ✔ - mesially, distally, lingually, facially, gingivally,
occlusally, and rotated on its axis
What are the four directional forces used in orthodontics? - ANSWER ✔ - Tipping, Torquing, bodily
movements and rotation
What are the three bends used in the Standard edgewise appliance - ANSWER ✔ - First, second and third
What does first order bends do to the teeth - ANSWER ✔ - Intrude and extrude teeth vertically these
bends also move labiolongually to achieve correct in and out tooth position
