Ultrasonic osteotome bit

An operation method for an ultrasonic osteotome bit, the ultrasonic osteotome bit comprising a bit bar, a bit body and a bit tip, with one end of the bit bar being connected to the bit tip, and the other end of the bit bar being connected to the bit body, wherein the bit tip is of a straight prism or substantially straight prism shape with a cross section of a polygonal shape, the bit tip having at least two cutting faces with different cutting widths, which are formed by at least one side face of the straight prism or substantially straight prism structure and through which the ultrasonic osteotome bit is operable to generate at least two incisions of different widths in a cutting object, wherein the at least two cutting faces extend from a foremost end face of the bit tip towards the bit bar, the operation method comprising:

• rotating the ultrasonic osteotome bit around as axis of the ultrasonic osteotome bit such that the ultrasonic osteotome bit performs cutting bones with one of the at least two cutting faces,
• wherein a shortest distance among distances between respective opposite sides of the polygonal shape is not equal to a longest distance among distances between respective opposite sides of the polygonal shape, and the two opposite sides having the shortest distance are perpendicular to the two opposite sides having the longest distance so that the bit tip has at least two cutting widths.

An ultrasonic osteotome bit for cutting bones, comprising a bit bar, a bit body and a bit tip, with a first end of the bit bar being connected to the bit tip, and a second end of the bit bar being connected to the bit body, wherein:

• the bit tip is of a straight prism or substantially straight prism shape with a cross section convex octagon,
• the bit tip has at least two cutting faces with different cutting widths extending from a foremost end face of the bit tip to the bit bar,
• a shortest distance among distances between respective opposite sides of the convex octagon is not equal to a longest distance among distances between respective opposite sides of the convex octagon, and the two opposite sides having the shortest distance are perpendicular to the two opposite sides having the longest distance, and
• a first cutting width of the at least two cutting widths is equal to the shortest distance, and a second cutting width of the at least two cutting widths is equal to the longest distance.