Surgical oscillating saw blades
The present invention provides an improved surgical instrument for performing bone osteotomies with reduced heat generation.
1 . An oscillating bone saw blade having a rake angle ( 12 , 20 ) in the range from 5 to 10 degrees on two or more adjacent saw blade teeth ( 1 , 2 ), the blade further comprising a positive relief angle ( 15 ) on at least some of the saw blade teeth ( 1 , 2 ), the positive relief angle being in the range from 5 to 15 degrees.
2 . The oscillating bone saw blade of claim 1 , wherein all of the teeth are oriented to cut in a same direction.
3 . The oscillating bone saw blade of claim 1 , wherein the teeth are oriented to cut in opposing directions, with a half of the teeth cutting in each direction.
4 . The oscillating bone saw blade of claim 1 , wherein the teeth are shaped to cut in a first direction and a second direction.
5 . The oscillating bone saw blade of claim 1 adapted for medical use.
6 . The oscillating bone saw blade of claim 1 , which is sterilized and packaged.
7 . The oscillating bone saw blade of claim 1 , which is a flat or planar saw blade.
8 . The oscillating bone saw blade of claim 1 , wherein the positive relief angle is 10 degrees.
9 . The oscillating bone saw blade of claim 1 , wherein a base of each saw blade tooth is cut at an angle configured to direct bone chips sideways out from between adjacent saw blade teeth.
10 . The oscillating bone saw blade of claim 1 , wherein a cutting face of each saw blade tooth is angled sideways such that the cutting face is configured to direct bone chips sideways out from between adjacent saw blade teeth.
11 . The oscillating bone saw blade of claim 10 , wherein the cutting faces of adjacent saw blade teeth are angled in opposite directions.
12 . An oscillating bone saw comprising the saw blade of claim 1 and a drive unit.
13 . A method of performing a bone surgery in human or veterinary medicine, comprising cutting a bone with the oscillating saw blade of claim 1 .
14 . The method of claim 13 , wherein cutting the bone comprises using the oscillating saw blade to make a cylindrical cut for use in a TPLO procedure.
15 . The method of claim 13 , wherein cutting the bone comprises using the oscillating saw to cut a dome osteotomy for use in a TPLO procedure.