US 12,064,126 B2
Surgical burs with localized auxiliary flutes
John W. Kulas, Euless, TX (US); and Donald E. Stearns, Fort Worth, TX (US)
Assigned to Medtronic Xomed, Inc., Jacksonville, FL (US)
Filed by Medtronic Xomed, Inc., Jacksonville, FL (US)
Filed on Sep. 23, 2020, as Appl. No. 17/029,437.
Application 17/029,437 is a continuation of application No. 15/966,778, filed on Apr. 30, 2018, granted, now 10,786,266.
Application 15/966,778 is a continuation of application No. 14/674,002, filed on Mar. 31, 2015, granted, now 9,955,981, issued on May 1, 2018.
Prior Publication US 2021/0000488 A1, Jan. 7, 2021
Int. Cl. A61B 17/16 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/1695 (2013.01) [A61B 17/1615 (2013.01); A61B 17/1617 (2013.01); A61B 2017/00544 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A surgical bur for use in cutting bone, comprising:
a plurality of primary cutting flutes including (i) first clearance surfaces and (ii) first rake surfaces having first bone cutting edges; and
a plurality of auxiliary cutting flutes including (i) second clearance surfaces and (ii) second rake surfaces having second bone cutting edges,
wherein at least one of the plurality of auxiliary cutting flutes has a selected clock angle relative to one of the plurality of primary cutting flutes of at least 35°, and
wherein at least a first auxiliary cutting flute of the plurality of cutting flutes is discretely located on a proximal region of the surgical bur and at least a second auxiliary cutting flute of the plurality of cutting flutes is discretely located on a distal region of the surgical bur, the proximal and distal regions of the surgical bur separated by a planar portion defined where a diameter of the surgical bur is at a maximum, and wherein each of the auxiliary cutting flutes of the plurality of auxiliary cutting flutes remains spaced relative to the planar portion in a respective region.