MDS PREP

Which of the following is untrue of true class III malocclusion
1) Concave profile
2) Increased gonian angle
3) Protrusion of lower anterior teeth
4) Forward path of closure

Orthodontics Answer: 3

The centre of rotation for bodily movement of tooth is located
1) Apical one-third of root
2) At infinity
3) Apical two-thirds
4) Middle one-thirds of root

Orthodontics Answer: 2

Mouth breathing with enlarged adenoids and tonsils may be best described as
1) Anatomic
2) Obstructive
3) Physiologic
4) Habitual

Orthodontics Answer: 2

Passive component of fixed appliance
1) Brackets
2) Arch wires
3) Springs
4) Elastics

Orthodontics Answer: 1

Diastema is often the result of
1) Tongue thrusting
2) Finger sucking
3) Mouth breathing
4) None of the above

Orthodontics Answer: 1

In orthodontic treatment, in order to avoid injuries to the tissues, the forces applied generally should not exceed
1) Capillary blood pressure
2) Diastolic arterial blood pressure
3) Masticatory forces
4) Systolic arterial blood pressure

Orthodontics Answer: 1

A coil spring used over an arch wire segment for space regaining should deliver a force of
1) 15-30 g
2) 50-100 g
3) 90-120 g
4) 120-150 g

Orthodontics Answer: 3

All of the following do not require definite retention except
1) Dentition treated by serial extraction
2) Anterior crossbites
3) Posterior crossbites
4) Rotation of teeth

Orthodontics Answer: 4

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MDS PREP

Which of the following is untrue of true class III malocclusion1) Concave profile2) Increased gonian angle3) Protrusion of lower anterior teeth4) Forward path of closure

The centre of rotation for bodily movement of tooth is located 1) Apical one-third of root2) At infinity3) Apical two-thirds4) Middle one-thirds of root

Mouth breathing with enlarged adenoids and tonsils may be best described as1) Anatomic2) Obstructive3) Physiologic4) Habitual

Passive component of fixed appliance1) Brackets2) Arch wires3) Springs4) Elastics

Diastema is often the result of1) Tongue thrusting2) Finger sucking3) Mouth breathing4) None of the above

In orthodontic treatment, in order to avoid injuries to the tissues, the forces applied generally should not exceed1) Capillary blood pressure2) Diastolic arterial blood pressure3) Masticatory forces4) Systolic arterial blood pressure

A coil spring used over an arch wire segment for space regaining should deliver a force of1) 15-30 g2) 50-100 g3) 90-120 g4) 120-150 g

All of the following do not require definite retention except1) Dentition treated by serial extraction2) Anterior crossbites3) Posterior crossbites4) Rotation of teeth

Explore by subjects

Which of the following is untrue of true class III malocclusion
1) Concave profile
2) Increased gonian angle
3) Protrusion of lower anterior teeth
4) Forward path of closure

The centre of rotation for bodily movement of tooth is located
1) Apical one-third of root
2) At infinity
3) Apical two-thirds
4) Middle one-thirds of root

Mouth breathing with enlarged adenoids and tonsils may be best described as
1) Anatomic
2) Obstructive
3) Physiologic
4) Habitual

Passive component of fixed appliance
1) Brackets
2) Arch wires
3) Springs
4) Elastics

Diastema is often the result of
1) Tongue thrusting
2) Finger sucking
3) Mouth breathing
4) None of the above

In orthodontic treatment, in order to avoid injuries to the tissues, the forces applied generally should not exceed
1) Capillary blood pressure
2) Diastolic arterial blood pressure
3) Masticatory forces
4) Systolic arterial blood pressure

A coil spring used over an arch wire segment for space regaining should deliver a force of
1) 15-30 g
2) 50-100 g
3) 90-120 g
4) 120-150 g

All of the following do not require definite retention except
1) Dentition treated by serial extraction
2) Anterior crossbites
3) Posterior crossbites
4) Rotation of teeth