Ortho tooth movement

 axial or occlusal movement of the tooth from its developmental position within the jaw to its functional position in the occlusal plane.

• Tooth Eruption

• Intrusion

• Migration

What is the range of force exerted during normal mastication?

• 1-50kg

• 1-30kg

• 25-50kg

• 25-45kgg

This type of tooth movement maintains interproximal and occlusal contact.

Answer explanation

Migration or Drift of Teeth

A “fluid-filled space with retentive but porous walls” that connects the cementum and lamina dura of the alveolar bone.

What term describes the phenomenon where deformation of a crystal structure, such as bone, produces a flow of electric current due to electron displacement within the crystal lattice?

• Teeth remain stable in their position as the unbalanced forces acting on them, are below the threshold limit tolerated by the metabolism in PDL

• True

• False

In the upper anterior region, the force exerted by the tongue is greater than the lip, while in the lower anterior region, the force exerted by the lip is greater than the tongue.

• True

• False

In the upper anterior region, the force exerted by the lip is greater than the tongue, while in the lower anterior region, the force exerted by the tongue is greater than the lip.

• True

• False

What is the threshold limit for light-continuous orthodontic force?
a) 5-10 gm/cm²

b) 15-20 gm/cm²
c) 20-26 gm/cm²
d) 30-35 gm/cm²

• A

• B

• C

• D

What chemical messenger appears after 4 hours of orthodontic force application? This is also the 2nd messenger

• • Prostaglandin E 

• • Cyclic AdenoMonoPhosphate (cAMP) and Calcium

• protein kinase