Application for Continuous Heavy Force

In contrast to continuous light forces, the application of a continuous heavy force causes a very different sequence of biological events.

Minutes: Blood flow gets cut off to compare the PDL area.

Hours: Cell death in the compressed area.

3 to 5 Days: Cell differentiation in adjacent marrow space; undermining resorption begins.

7 to 14 Days: Undermining resorption removes lamina dura adjacent to the compressed periodontal ligament.

14 to 25 Days: Tooth movement occurs (In contrast to the tooth movement occurring within 2 days with continuous light forces).