Changes in the diamond bur before and after tooth preparation
Objective: To find out the change in the surface roughness of the diamond bur before and after tooth preparation
Methodology: Extracted human mandibular molar teeth were used in the study. A new round end tapered diamond bur was selected and was observed under the scanning electron microscope and optical profilometer was used to measure the surface roughness. Using this bur the enamel from the tooth was sectioned circumferentially. The bur was then initially cleaned with a brush and then placed in an ultrasonic cleaner for 3 minutes in distilled water bath and was observed again under the scanning electron microscope and the roughness was checked with the optical profilometer. This same bur was then used to prepare the dentinal surface of the tooth circumferentially followed by cleaning of the bur in the same manner and it was then observed under the scanning electron microscope and the surface roughness was measured using the optical profilometer.
Result: There was an increase in the diamond point after the cutting of enamel from 2.98μm to 3.38μm followed by a decrease in the roughness after the cutting of dentin from 2.98μm to 1.90μm.
Conclusion: There is a decrease in the surface roughness of the diamond point after tooth preparation indicating a decrease in the cutting efficiency of the bur.
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