Biology Of Tooth Movement

BIOLOGY OF TOOTH MOVEMENT By: Dr shabeel pn

Introduction Orthodontic tooth movement is a unique process where a solid object (tooth) is made to move through a solid medium (bone). Orthodontic treatment is possible due to the fact that whenever a prolonged force is applied on a tooth,bone remodelling occurs around the tooth resulting in its movement .

Structure of periodontal ligament: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

I.Physiologic Tooth Movement ,[object Object],[object Object],[object Object],[object Object],[object Object]

TOOTH ERUPTION: ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object]

B) Migration or drift of teeth: ,[object Object],[object Object],[object Object],[object Object]

C) Tooth movement during mastication: ,[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

II.Orthodontic Tooth Movement ,[object Object],[object Object],[object Object]

Changes following application of mild forces: ,[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

Change following application of extreme forces: ,[object Object],[object Object],[object Object],[object Object],[object Object]

Optimum orthodontic force: ,[object Object],[object Object],[object Object],[object Object]

From a clinical point of view,Optimum orthodontic force has the following characteristics: ,[object Object],[object Object],[object Object],[object Object]

From a histological point of view the use of optimum force has the following characteristics:- ,[object Object],[object Object],[object Object]

Hyalinization: ,[object Object],[object Object],[object Object],[object Object]

Changes observed during formation of hyalinized zone are: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Elimination of hyalinised tissue ,[object Object],[object Object],[object Object]

Forces & Hyalinization ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object]

Phases of tooth movement ,[object Object],[object Object],[object Object],[object Object]

Initial phase: ,[object Object],[object Object],[object Object],[object Object],[object Object]

Lag phase: ,[object Object],[object Object],[object Object]

Post lag phase: ,[object Object],[object Object]

Theories of tooth movement: ,[object Object],[object Object],[object Object]

Pressure tension theory by Schwarz.(classic theory) ,[object Object],[object Object],[object Object]

Fluid dynamic theory by Bien/ Blood flow theory ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object]

Bone bending & piezoelectric theory: ,[object Object],[object Object],[object Object]

Piezoelectric signals have two unusual characteristics. ,[object Object],[object Object],[object Object],[object Object],[object Object]

Bone deposition: ,[object Object],[object Object],[object Object],[object Object],[object Object]

Bone resorption: ,[object Object],[object Object],[object Object],[object Object],[object Object]

Biology Of Tooth Movement

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Biology Of Tooth Movement