8 terms

Instrument sharpening hygiene 2011-2013

Advantages of instrument sharpening
1) Easier calculus removal

2) Improved stroke control

3) Reduces the number of strokes

4) Increased patient comfort and satisfaction

5) Reduced clinical fatigue
-a dull instrument requires more pressure and more strokes= unecessary pressure on MS system
Goal of sharpening
1)To restore a fine sharp edge to a dull instrument

2) Technique removing a minimum amount of
metal from the instrument

3) Maintain the original characteristics of the
working edge
How often should you sharpen
* First sign of dullness
* During treatment
* After treatment
Types of sharpening stones
1) Composition synthetic stones - (coarse) - water

2) India synthetic stones -(medium) - water & oil

3) Arkansas natural stone - (fine) - oil not advised when treating patients

4) ceramic synthetic stones - (fine) - water advised when sharpening during patient treatment
Why sharpen
1) To preserve Strength of the instrument

2) To maintain the shape of the instrument

3) More effective scaling with less pressure

* increased pressure
* uncomfortable for the patient
more chance of the instrument flying off and could cause injury to myself as wel as the patient
Correct stone angulation
Between 70-80 degrees is needed to recreate angle between face and lateral surface
Minute metal burs
* Burs that project from the cutting edge (wire edges)
* Can cause gouging if the cementum
How can minute burs be removed from cutting edge
* By finishing with a downward stroke
* Can be seen or cleared with cylindrical sharpening stone