CVD DIAMOND BURS 3

ADVANTAGE
Better Cooling: Cooling water flows over the entire CVD tip rod and reaches the extremity without interference with its trajectory

Less Noise: Noise occurs only when the CVDpoint comes into contact with tooth Structure

Greater Durability: As a result of the new manufacturing technology, the resistance of the CVD diamond to displacement is greater than traditional diamond tips

Better Access and Visibility: CVD tip rods are long which allows the complete working area to be seen. They are also angled to provide better access to inaccessible areas

Effective Cavity Cleaning:

• Ultrasound produces a phenomenon called ultrasonic cavitation.
• Ultrasonic action forms air bubbles in a liquid medium.
• Many of these bubbles rise to the surface while others grow and implode, releasing a large amount of energy.
• This energy liberated on implosion causes intense movement of particles and cleaning of surfaces. This is the phenomenon which facilitates the cleaning of the surface of CVDdiamond instruments within the ultrasonic environment.

Preservation of tooth structure

Minimal damage to gingival tissue

Improved proximal access

Reduced risk of metal contamination

DISADVANTAGE

The cost of the CVD equipment must be considered for it is approximately 30 times more expensive than a conventional tip.

PROCEDURE

CVD DIAMOND BURS 2

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MANUFACTURING

These tips, called CVD, are produced in a reactor in which a mixture of methane and hydrogen gases results in the formation of a single artificial diamond layer without space between the grains on the substrate (a molybdenum rod)

WORKING PRINCIPLE

CVD diamonds burs present unidirectional oscillating movement with maximal displacement ranging from 50 to 60 micron,at oscillating frequencies ranging from 25,000 to 32,000 Hz.

CVD diamond tip require only a slight touch to promote tooth grinding

This differs from the high speed handpiece, which is manipulated with pendulum movements over tooth structure.

Movement with maximal displacement ranging from 50 to 60 micron,at oscillating frequencies ranging from 25,000 to 32,000 Hz.


CVD diamond burs must be handled with light hand pressure,just enough to guide the instrument.

If too much load pressure is applied,the cutting effectiveness is reduced and pain,noise,and heat will be generated.

A greater application force reduces the cutting ability of the tip and may lead to fracture of the molybdenum substrate.

In addition the lack of irrigation of the ultrasound instrument on the treated surface may cause the tip to heat up and fracture.

This system doesn’t lose superficial diamond during cutting,subsequently extending the lifetime.

CVD feature significantly decrease the risk of metal contamination

CVD instrument allows the capability of working at high inclination angles,resulting in safer proximal finishing with less chance of hitting adjacent tooth.