Biology Of Orthodontic Tooth Movement PDF
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Summary
This document discusses the biological response to orthodontic force, focusing on the mechanisms of tooth movement, including prolonged pressure, bone remodeling, and the piezo-electric effect. It details how changes in blood flow to the periodontal ligament (PDL) and biological electricity play a role in bone remodeling and tooth movement.
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BIOLOGY OF ORTHODONTIC TOOTH MOVEMENT ORTHODONTICS SECTION 1 PROLONGED TOOTH PRESSURE MOVEMENT MECHANISM : Remodelling of Socket NEEDED FOR TOOTH MOVEMENT Bone remodelling around the periodontal ligament (apposition/resorption) Reorganisation of...
BIOLOGY OF ORTHODONTIC TOOTH MOVEMENT ORTHODONTICS SECTION 1 PROLONGED TOOTH PRESSURE MOVEMENT MECHANISM : Remodelling of Socket NEEDED FOR TOOTH MOVEMENT Bone remodelling around the periodontal ligament (apposition/resorption) Reorganisation of the periodontal ligament What is the stimulus for bone remodelling? Changes in Blood flow to the PDL Biological electricity (piezo-electric effects?) THE PIEZO-ELECTRIC EFFECT Changing the shape of a crystalline material causes an electrical current flow off 0 charge on 1 2 3 seconds PIEZO-ELECTRICITY IN BONE SOURCE Bone Mineral Collagen EFFECT: Rhythmic pulses of electric pulses during function (chewing, walking etc.) Important in order to maintain mineralisation Time course of events: Heavy biting pressure Milliseconds Fluid incompressible in periodontal ligament Seconds Fluid leaking out
