CN201422900Y

CN201422900Y - Acetabular fossa trigone drill bit for artificial hip replacement

Info

Publication number: CN201422900Y
Application number: CN2009201861197U
Authority: CN
Inventors: 袁伟; 吴健; 吴立华; 沈定华; 秦峰
Original assignee: 105 HOSPITAL OF PLA
Current assignee: 105 HOSPITAL OF PLA
Priority date: 2009-06-29
Filing date: 2009-06-29
Publication date: 2010-03-17
Anticipated expiration: 2019-06-29

Abstract

The utility model relates to an acetabular fossa trigone drill bit for artificial hip replacement, which solves the problems that the top end of an acetabular fossa twist drill bit for artificial hipreplacement is sharp, soft tissues, such as vessels and nerves in a pelvis are easily injured during the operations, and the drill bit is easy to break off. The acetabular fossa trigone drill bit comprises a drill bit and a drill rod, wherein the drill bit is in a trigone conical shape, the taper range of the trigone cone is within 20-40 degrees, and the diameter of the drill rod is 2.5-3.5mm. Thecross section of the trigone conical drill bit is in an equilateral triangle. The drill bit does not have a tough slot which is similar to the twist drill bit, and has 2.5-3.5mm diameter which is larger than that of the twist drill bit, and can never break off in the normal use. As the cross section of the drill bit is in an equilateral triangle, and the diameter of the drill bit is appropriatelyenlarged, a hole drilled by the drill bit can be more adaptive to a fixing screw of acetabular fossa, and the soft tissues, such as vessels and nerves in the pelvis can effectively avoid injuring inthe drilling process.

Description

The acetabular fossa rhizoma sparganic drill bit that is used for Replacement of Hip Joint

Technical field

This utility model relates to a kind of medical apparatus, specifically is used for the acetabular fossa drill bit of Replacement of Hip Joint.

Background technology

At present, carry out both at home and abroad in the total hip replacement operation, fixedly to fix with the spiral bit of the band lever screw of at the bottom of acetabular bone, holing also during the manual acetabulum nest.Because of this kind spiral bit is thinner, the aperture, hole of being bored less (the about 2-2.5mm of diameter) relatively requires great effort when being screwed into the supporting fixed screw of manual acetabulum nest, and in use the accident that spiral bit fractures takes place often; Find in the clinical use that the reason that fluted drill fractures mainly contains 2 points: 1, the tough groove of drill bit is conflicted the screw of having inserted and is caused that bit force is excessive to fracture in the operation; 2, firmly be not orthogonal to boring direction in the drilling operation, drill bit more carefully can't bear external force and fracture.The spiral bit tip is sharp keen in addition, has the risk of soft tissues such as blood vessel, nerve in the damage pelvis in the operation.

Summary of the invention

In order to solve most advanced and sophisticated sharp keen that the acetabular fossa spiral bit that is used for Replacement of Hip Joint exists, the problem that exists soft tissues such as damaging the interior blood vessel of pelvis, nerve and drill bit to fracture in the operation, this utility model provides a kind of acetabular fossa rhizoma sparganic drill bit that is used for Replacement of Hip Joint.

Concrete technical solution is as follows:

The acetabular fossa rhizoma sparganic drill bit that is used for Replacement of Hip Joint comprises drill bit 1 and drilling rod 2, and drill bit 1 is the rhizoma sparganic taper, and the cone angle scope of triangular pyramid is the 20-40 degree, and the cross section of rhizoma sparganic conic drill is an equilateral triangle; Drilling rod 2 diameters are the 2.5-3.5 millimeter.

Useful technique effect of the present utility model is embodied in the following aspects:

1, this utility model drill bit does not have the tough groove of similar fluted drill, and diameter is that 2.5-3.5mm is bigger than fluted drill, and accident during normal use never fractures.

2, this utility model drill bit is the rhizoma sparganic taper, and its cross section is an equilateral triangle, and suitably increases bit diameter, makes its hole of boring and acetabular fossa fixed screw more adaptive; Can effectively avoid in the boring procedure soft tissues such as blood vessel, nerve of damage pelvis inside.

Description of drawings

Fig. 1 is this utility model structural representation,

Fig. 2 is the A-A cutaway view of Fig. 1.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Embodiment 1:

Referring to Fig. 1 and Fig. 2, the acetabular fossa rhizoma sparganic drill bit that is used for Replacement of Hip Joint comprises drill bit 1 and drilling rod 2, and drill bit is the rhizoma sparganic taper, and the cone angle A of triangular pyramid is 20 degree, and the cross section of rhizoma sparganic conic drill is an equilateral triangle; Drill pipe diameter D is the 2.5-3.5 millimeter.

Embodiment 2:

The cone angle A of triangular pyramid is 40 degree, and other is with embodiment 1.

Claims

1, be used for the acetabular fossa rhizoma sparganic drill bit of Replacement of Hip Joint, comprise drill bit and drilling rod, it is characterized in that: described drill bit is the rhizoma sparganic taper, and the cone angle scope of triangular pyramid is the 20-40 degree; Described drill pipe diameter is the 2.5-3.5 millimeter.

2, the acetabular fossa rhizoma sparganic drill bit that is used for Replacement of Hip Joint according to claim 1, it is characterized in that: the cross section of described rhizoma sparganic conic drill is an equilateral triangle.