Dental Bur Rake Angle

Dental Bur Rake Angle

Write a short note on the rake angle.
Answer:

Each bur blade has two sides, the rake face and clearance face, and three angles, rake angle, edge angle, and clearance angle.

• The rake angle is the most important design characteristic of a burred blade.
• The rake angle is the angle between the rake face and the radial line.
• The rake angle depends on such factors as the mechanical properties of the blade material, the mechanical properties of the material being cut, the rotational speed and diameter of the bur, and the lateral force applied by the operator.

Types of Rake Angle:

• Positive rake angle: When the rake face trails the radial line.
• Negative rake angle: When the rake face is ahead of the radial line.
• Zero rake angle: When the rake face and radial line coincide with each other.