Air abrasion is introduced by Dr.Robert.B.Black.
It is a parallel stream of focused narrow beam of 27 micron size of aluminium oxide.
The particle move according to law of physics .
When directed towards tooth surface it abrade with out heat, vibration,and noise.
Air abrasion conserve the tooth structure and maintains the structural integrity of the tooth.
It requires moderate learning curve and one should feel confident in using it.
There is no tactile sensation because the Air abrasion hand piece doesnt touch the tooth,and the cutting article exit at the it.
It is a end cutting device incontrast to rotary it cuts laterally.
MODES OF USES
Air abrasion handpiece can used in Two modes
Focused and unfocused mode.
Focused mode - 1-2 mm away from the tooth structure,it cuts enamel and dentine.
Defocused mode - farther away,it cleans the surface,explores the caries.
LAW OS PHYSICS
ENERGY(E) = 1/2 MASS x VELOCITY
Kinetic energy can be increased by increasing mass and velocity.
kinetic energy decreases with increase in tip distance.
INDICATIONS
Children, unaccustomed to traditional rotary-instrument tooth cutting, can be introduced to Air abrasion dentistry without psychological trauma.
Patients who cannot have local anesthesia because of various health reasons can be treated using air-abrasion techniques.
Patients who are afraid of traditional dentistry techniques and the noise of airotor handpieces can be treated.
CONTRAINDICATIONS
Asthma
Dust allergy
Periodontal disease
Recent extraction sites
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