**1- How much force is required to tip an incisor:**

- 20-30gms
- 50-75gms
- 40-50gms
- 10-20 gms

The answer is: B

**2- Wires also called shape memory are:**

- stainless steel
- multiflex round wire
- nickel titanium wire
- stainless steel edgewise wire

The answer is: C

**3- When the diameter of wire is doubled the force exerted on teeth is:**

- 4 times
- 1/2 times
- 8 times
- 16 times

The answer is: D

**4-**** Which contemparay orthodontic wire has maximum surface tension:**

- Stainless steel
- Ajw wires
- TMA wires
- Niti wires

The answer is: C

**5- The pitch of hyrax expansion is:**

- 25mm
- 1mm
- 5mm
- 5mm

The answer is: B

**6-Cement used for cementation of orthodontics bracket is:**

- Composite
- Resins
- Gic
- None of the above

The answer is: A

**7-Active component of fixed appliance is:**

- Bracket
- Buccal tube
- Ligature
- Seperator

The answer is: D

**8- Uprighting spring is used to:**

- Derotate a tooth
- Move the root in mesiodistal direction
- Move the root in palatal direction
- Closure of space

The answer is: B

**9- Reinforced anchorage example is:**

- Bite plane anterior
- Posterior bite plan
- Inclined plane
- All of above

The answer is: C

**10- Moment to force ratio for bodily movement is:**

- 6
- 8
- 10
- >10

The answer is: D

**11- 1st order bends are:**

- Tipping bends.
- Toquing bends.
- In and out bends.
- Anchorage bends.
- Up and down bends.

The answer is: C

**12- When the gold wires were replaced by steel arch wires the reduction in the slot in the edgewise system was found to be:**

- 22 mil bracket
- 28 mil bracket
- 24 mil bracket
- 18 mil bracket

The answer is: D

**13- The artistic** **positioning bends are:**

- First order bend
- Second order bend
- Third order
- None

The answer is: B

**14- Whip spring is:**

- Fixed
- Semifixed
- Removable
- Functional

The answer is: C

**15- Amount of force required to protact maxilla is:**

- 12oz
- 12-16oz
- 16-20oz
- 24 oz

The answer is: D

**16- Example of fixed functional appliance is:**

- Churro jumper
- Mandibular anterior reposition applianace ( MARA)
- Sabbagh universal spring( sus)
- All of above

The answer is: D

**17- Amount of force required to applied by chin cap to stop mandibular growth:**

- 1200-1600gms
- 1000-1200gms
- 400-800gms
- 1600-2000gms

The answer is: B

**18-Orthodontic appliances should not be reactivated more frequently than at:**

- 1 week interval
- 2 week interval
- 3 week interval
- 4 week interval

The answer is: C

**19- The most efficient orthodontic tooth movement is produced by:**

- Light & intermittent forces
- Light & continuous forces
- Heavy & intermittent forces
- Heavy & continuous forces

The answer is: B

**20- Physiological tooth movements is which of the following:**

- Drifting of teeth
- Changes in tooth position during mastication
- Tooth eruption
- All of the above

The answer is: D

**21- Extreme forces applied to teeth, this can cause:**

- Undermining resorption
- Frontal Resorption
- Rearward resorption
- Secondary resorption

The answer is: A

**22- The optimum orthodontic force is:**

- 10 gm/sq cm
- 20-26 gm/sq cm
- 15 gm/sq cm
- 30-40 gm/sq cm

The answer is: B

**23- The presence of hyalinised zone as a result of extreme forces indicates that:**

- More force needs to be applied to move the tooth
- Further treatment is not possible till the local damaged tissue is removed
- Tooth movement is not affected
- None of the above

The answer is: B

**24- The amount of force necessary to tip an incisor is:**

- 20-30 gm
- 10-15 gm
- 1-5 gm
- 10-50 gm

The answer is: A

**25- ****The amount of force necessary to tip a canine is:**

- 1-10 gm
- 20-30 gm
- 50-75 gm
- 100-150gm

The answer is: C

**26- The amount of force needed for an intrusion is:**

** **

- 1-10 gm
- 100 gm
- 150-175 gm
- 15-50gm

The answer is: D

**27- Which of the following is the simplest tooth movement with a removable appliance:**

- Tipping
- Rotation
- Torquing
- Translation

The answer is: A

**28- Removable active plates apply:**

** **

- Zero force
- Intermittent force
- Continuous force
- interupted force

The answer is: B

**29- Translation of a small tooth requires how much force:**

** **

- 10 – 15 gm
- 100-150 gm
- 40-50 gm
- 20-30 gm

The answer is: C

**30- Tooth movements difficult to achieve are:**

** **

- Intrusion and extrusion
- Intrusion and translation
- Tipping and rotation
- Tipping and extrusion

The answer is: B

**31- Continuous heavy orthodontic forces used in moving teeth can cause all of the following EXCEPT:**

- Resorption of cementum
- Resorption of dentin
- Resorption of enamel
- Devitilise teeth

The answer is: C