Ultrasonic osteotome bit
Disclosed is an ultrasonic osteotome bit, which comprises a bit bar ( 1 ), a bit tip ( 2 ), and a liquid injection portion ( 3 ), one end of the liquid injection portion ( 3 ) being connected to the bit bar ( 1 ) and the other end of the liquid injection portion ( 3 ) being connected to the bit tip ( 2 ), wherein the ultrasonic osteotome bit further comprises a hollow liquid injection channel ( 10 ), the hollow liquid injection channel ( 10 ) penetrates from a tail end of the bit bar ( 1 ) to the liquid injection portion ( 3 ) along an axial direction of the bit bar ( 1 ), the liquid injection portion ( 3 ) is provided with a transverse liquid guide channel ( 20 ) penetrating transversely, i.e. substantially perpendicular to an axis of the bit bar ( 1 ), the transverse liquid guide channel ( 20 ) is in communication with the hollow liquid injection channel ( 10 ), and the transverse liquid guide channel ( 20 ) forms openings in lateral faces of the liquid injection portion ( 3 ). The ultrasonic osteotome bit allows a cooling liquid to sufficiently flow to the bit without being excited or scattered by ultrasonic vibration, thereby ensuring that the bit tip ( 2 ) is sufficiently cooled during use.
1. An ultrasonic osteotome bit comprising:
a bit bar ( 1 ) having a hollow liquid injection channel ( 10 ) penetrating from a tail end of the bit bar ( 1 ) along an axis of the bit bar ( 1 ),
a bit tip ( 2 ) having wide planes ( 23 ), and
a liquid injection portion ( 3 ), one end of the liquid injection portion ( 3 ) being connected to the bit bar ( 1 ) and the other end of the liquid injection portion ( 3 ) being connected to the bit tip ( 2 ),
wherein the liquid injection portion ( 3 ) is provided with a transverse liquid guide channel ( 20 ) penetrating substantially perpendicular to an axis of the bit bar ( 1 ), the transverse liquid guide channel ( 20 ) is in communication with the hollow liquid injection channel ( 10 ), and the transverse liquid guide channel ( 20 ) forms openings in lateral faces of the liquid injection portion ( 3 ),
wherein the liquid injection portion ( 3 ) is provided with a large part ( 31 ) and a small part ( 32 ) sequentially running from the bit bar ( 1 ) to the bit tip ( 2 ), and two liquid discharge faces ( 5 ) substantially parallel to the wide planes ( 23 ) of the bit tip ( 2 ) are formed on the small part ( 32 ).
2. The ultrasonic osteotome bit according to claim 1 , wherein
the liquid injection portion ( 3 ) and the bit tip ( 2 ) have different thicknesses, and the liquid injection portion ( 3 ) is connected transitionally with the bit tip ( 2 ) via a wedge-shaped transition portion ( 4 ).
3. The ultrasonic osteotome bit according to claim 2 , wherein
the angle between an inclined plane of the wedge-shaped transition portion ( 4 ) and an axis direction of the bit tip ( 2 ) is less than 10 degrees.
4. The ultrasonic osteotome bit according to claim 3 , wherein
the bit tip ( 2 ) is in the shape of a planar sheet with the two wide planes ( 23 ) being substantially parallel to each other, or in the shape of a planar wedge with the two wide planes ( 23 ) forming an angle.
5. The ultrasonic osteotome bit according to claim 4 , wherein
a cutting portion ( 22 ) is formed at a front end of the bit tip ( 2 ), and the cutting portion ( 22 ) is in the shape of a semicircle, a quarter circle, a hook, or a triangle.
6. The ultrasonic osteotome bit according to claim 4 , wherein
the bit tip ( 2 ) is bent toward one side in a direction perpendicular to the wide planes ( 23 ) of the bit tip ( 2 ).
7. The ultrasonic osteotome bit according to claim 6 , wherein
the angle between the bit tip ( 2 ) and a central axis of the bit bar ( 1 ) is 0 to 30°.
8. The ultrasonic osteotome bit according to claim 7 , wherein
the bent part of the bit tip ( 2 ) is at the wedge-shaped transition portion ( 4 ).
9. The ultrasonic osteotome bit according to claim 4 , wherein
the bit tip ( 2 ) is bent toward one side in a direction parallel to the wide planes ( 23 ) of the bit tip ( 2 ).
10. The ultrasonic osteotome bit according to claim 9 , wherein
the angle between the bit tip ( 2 ) and a central axis of the bit bar ( 1 ) is 0 to 45°.
11. The ultrasonic osteotome bit according to claim 4 , wherein
lateral faces of the planar wedge that are perpendicular to the two wide planes ( 23 ) are isosceles trapezoidal or right-angled trapezoidal in shape.
12. The ultrasonic osteotome bit according to claim 1 , wherein
cutting teeth ( 21 ) are formed on one side or two sides of a blade of the bit tip ( 2 ).
13. The ultrasonic osteotome bit according to claim 12 , wherein
the cutting teeth ( 21 ) are sharp teeth or square teeth, and tooth tips of the cutting teeth ( 21 ) all protrude forward in an axial direction of the bit bar ( 1 ).
14. The ultrasonic osteotome bit according to claim 12 , wherein
a bent part of the bit tip ( 2 ) is at a wedge-shaped transition portion ( 4 ).
15. The ultrasonic osteotome bit according to claim 1 , wherein
the liquid injection portion ( 3 ) is cylindrical in shape.
16. The ultrasonic osteotome bit according to claim 1 , wherein
the two liquid discharge faces ( 5 ) are substantially parallel to each other.
17. The ultrasonic osteotome bit according to claim 1 , wherein
the openings formed by the transverse liquid guide channel ( 20 ) are formed in the two liquid discharge faces ( 5 ) respectively.