Surgical reamer

Details Surgical reamer Surgical reamer

A - Human Necessities

61

B

128/113

A61B 17/32 (2006.01) A61B 17/16 (2006.01)

Patent

CA 2035379

The cutting head 10 for a surgical reamer has a leading end 12 for insertion into a bone canal 60 and a trailing end 13 for attachment to a drive shaft 16. The cutting head has a cutting surface formed about an axis of rotation of the cutting head. The cutting surface is formed by the rotation of the cutting edges on a plurality of flutes 20 spaced around the axis of rotation. Each cutting edge has a first portion 26 spaced a predetermined radial distance from the axis of rotation at the tip portion 22 and terminates at a terminating point 30 which is at a greater radial distance from the axis of rotation than the starting point 28. The cutting edge on each flute 20 has a second portion 32 having a starting point 34 at the trailing end 24 of the cutting head 10 which is at a second predetermined radial distance from the axis of rotation. The second portion 32 extends axially towards the tip portion 22 and terminates at a point 36 at a greater radial distance from the axis of rotation than the starting point 34 thereof. A third curved portion 38 starts at the terminating point 30 of the first portion 26 and terminates at the terminating point 36 of the second portion 32 and inter- sects the first and second portions tangentially.

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