BIOMECHANICS

Internal resistance force against the external force or Load is called

• Internal stress

• Magnitude

• strain

• Force

Change in form or Dimension of an object due to the external force or load is called

• Stress

• Strain

• Vector

• Scalar

If the force is applied through tooth's Centre of resistance ,then tooth will

• Tip

• Translate or move Bodily

• Intrude

• Extrude

A tooth will translate when its Centre of rotation is at

• The incisal edge

• The Bracket

• Infinity

• The root apex

Couple is

• Two equal perpendicular forces

• Two equal parallel forces

• Two non equal opposite forces

• Two equal and Opposite forces

Tooth movement easily accomplished by a removable appliance

• Tipping

• Bodily movement

• Torquing

• Expansion

In which Orthodontic movement utmost control is required

• Tipping

• Extrusion

• Intrusion

• Rotation

Which of the following forces best accomplishes Orthodontic tooth movement

• Heavy and Continuous

• Heavy and Intermittent

• Light and Continuous

• Light and Intermittent

Torquing movement in orthodontics is

• The movement of the root without moving the crown

• Cannot be accomplished in Clinical practice

• Is always deleterious to tooth

• None of the above

Centre of resistance for Maxillary dentition is at

• The maxillary sinus

• In the furcation of maxillary first molar

• Between the roots of premolars

• Distal to second molar