Acetabular componentTechnical field
The present invention relates to artificial prosthesis technical field, in particular to a kind of acetabular component.
Background technology
Acetabular component applies to a kind of implant in current orthopaedics hip replacement, is applicable to reparation and the reconstruction at human body acetabular bone position.Prothesis implant body femoral head, the femoral stem of it and human femur under loading side form a set of hip prosthesis jointly.This kind of acetabular component is normally formed by outer cup and liner assembly.The biotype outer surface of its outer cup and the sclerotin in Human Physiology acetabular bone face fit formation bone interface, and the femoral head routing motion in the inner surface of liner and femur side prosthesis forms joint-friction face.Thus realize the joint motions after implanting.
In prior art, the mode of acetabular outer cup and skeletal fixation is: screw is fixed, and namely first acetabular outer cup is placed on skeleton, uses screw-driving.On initial stability, screw fixing operation is not very convenient, there is certain operation easier, also easy by nail twist partially cause fixing insecure, and acetabular outer cup and skeleton is fixing, the connection of acetabular outer cup and liner is carried out in two steps, and it is loaded down with trivial details that this not only result in Connection Step, but also initial stability can be made poor.
Summary of the invention
Main purpose of the present invention is to provide a kind of acetabular component, with solve acetabular outer cup of the prior art and skeleton be fixedly not easy operate, and the problem of the initial stability difference of acetabular cup and skeleton.
To achieve these goals, the invention provides a kind of acetabular component to comprise: acetabular outer cup, pressure hook and liner.Acetabular outer cup has dodges breach; The first end that pressure hooks is connected to dodges indentation, there, and the second end that pressure hooks has towards the outboard end outside acetabular outer cup with towards the medial extremity inside acetabular outer cup, and outboard end has tip, and the tip that pressure hooks does not protrude from the outer surface of acetabular outer cup in a free state; Liner hooks with pressure and coordinates and tip can be pressed out to outside acetabular outer cup.
Further, pressure hooks on the side of the inside of acetabular outer cup, is provided with pressure hook double wedge, liner lateral surface is provided with and presses the liner double wedge hooking double wedge and coordinate, and pressure hooks after double wedge coordinates with liner double wedge and liner is fixed in acetabular outer cup.
Further, dodge breach and press hook be multiple and arrange correspondingly.
Further, dodge breach and press to hook and all distribute along acetabular outer cup same level even circumferential.
Further, tip is wedge shape.
Further, the inner surface of acetabular outer cup is the conical surface and bottom surface is arc, liner and acetabular outer cup suitable.
Further, pressure hook double wedge and liner double wedge are the ratchet cooperatively interacted.
Further, liner double wedge ringwise.
Further, the medial extremity of the second end of pressure hook protrudes from the inner surface of acetabular outer cup in a free state.
Further, the medial extremity of the second end of pressure hook has knuckle.
Apply technical scheme of the present invention, acetabular outer cup is arranged on skeleton, and liner is arranged in acetabular outer cup.In the process of installing, liner and acetabular outer cup extrude to press and hook while coordinating, and pressure hook squeezes out acetabular outer cup.Because pressure hook has tip, while tip is extruded acetabular outer cup, hammer into skeleton, form incipient stability.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the acetabular outer cup schematic diagram of the embodiment according to acetabular component of the present invention; And
Fig. 2 shows the liner schematic diagram of the embodiment of the acetabular component of Fig. 1.
Wherein, above-mentioned accompanying drawing comprises the following drawings labelling:
10, acetabular outer cup; 11, pressure hooks; 111, pressure hooks double wedge; 112, tip; 113, knuckle; 20, liner; 21, liner double wedge.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As depicted in figs. 1 and 2, the acetabular component of the present embodiment comprises: acetabular outer cup 10, pressure hook 11 and liner 20.Acetabular outer cup 10 has dodges breach.The first end of pressure hook 11 is connected to dodges indentation, there, second end of pressure hook 11 has towards the outboard end outside acetabular outer cup 10 with towards the medial extremity inside acetabular outer cup 10, outboard end has tip 112, and the tip 112 of pressure hook 11 does not protrude from the outer surface of acetabular outer cup 10 in a free state.Liner 20, liner 20 coordinates with pressure hook 11 and tip 112 can be pressed out to outside acetabular outer cup 10.
The technical scheme of application the present embodiment, acetabular outer cup 10 is arranged on precalculated position, and liner 20 is arranged in acetabular outer cup 10.Acetabular outer cup 10 has dodges breach, and pressure hook 11 is arranged on dodges indentation, there.In the process of installing, liner 20 and acetabular outer cup 10 extrude and press hook 11 while coordinating, and the tip 112 of pressure hook 11 is squeezed out acetabular outer cup 10.Tip 112 can hammer in skeleton when being extruded acetabular outer cup 10, thus forms incipient stability.
As shown in Figure 1, dodging breach is be arranged on the through hole on acetabular outer cup 10.In the present embodiment, through hole is rectangular opening.Certainly, one skilled in the art will appreciate that the shape of through hole is suitable with the shape of pressure hook 11 as much as possible, the shape of through hole can be determined according to the shape of pressure hook 11.
As shown in Figure 1, in the technical scheme of the present embodiment, pressure hook 11 is provided with pressure and hooks double wedge 111 on the side of the inside of acetabular outer cup 10, liner 20 lateral surface is provided with and presses the liner double wedge 21 hooking double wedge 111 and coordinate, pressure hooks after double wedge 111 coordinates with liner double wedge 21 and liner 20 is fixed in acetabular outer cup 10.Said structure is conducive to liner 20 and forms fast locking with acetabular outer cup 10, and then make acetabular outer cup 10 and bone bed form incipient stability fast, ensure that the surgical effect that liner 20 settles at one go with the assembly of acetabular outer cup 10 and the incipient stability of acetabular outer cup 10.
In the technical scheme of the present embodiment, dodge breach and press hook 11 be multiple and arrange correspondingly, multiple pressure hook 11 fully can ensure that acetabular outer cup 10 is firmly together with bone-contact.
As shown in Figure 1, in the technical scheme of the present embodiment, through hole is uniformly distributed along the cylindrical of acetabular outer cup 10 same level.Equally distributed structure makes the uniform force of acetabular outer cup 10 and skeleton.
As shown in Figure 1, in the technical scheme of the present embodiment, tip 112 is in wedge shape, and it is relatively easy but also acetabular outer cup 10 and skeleton can be made more firm in combination that wedge structure not only makes tip 112 hammer into skeleton.
As shown in Figure 1, in the technical scheme of the present embodiment, the inner surface of acetabular outer cup 10 is the conical surface and bottom surface is arc, and liner 20 is suitable with acetabular outer cup 10.This structure had both met coordinating of acetabular outer cup 10 and liner 20, was convenient to again processing.
As depicted in figs. 1 and 2, in the technical scheme of the present embodiment, pressure hooks double wedge 111 and the ratchet of liner double wedge 21 for cooperatively interacting.This structure is easily processed, and the structure of ratchet is barb, is not easy to depart from after cooperation.
As depicted in figs. 1 and 2, in the technical scheme of the present embodiment, pressure hooks double wedge 111 and is positioned on pressure hook 11, and liner double wedge 21 circumference is distributed in liner 20 outer wall and is annular.Only have structure pressure hook 11 with pressure hook double wedge 111 that acetabular outer cup 10 and liner 20 are very easily locked in together.Even and if the structure that the liner double wedge 21 of liner 20 is annular ensure that relatively rotating appears in acetabular outer cup 10 and liner 20 and also can not depart from.
As shown in Figure 1, in the technical scheme of the present embodiment, pressure hook 11 comprises near the first end of acetabular outer cup 10 rim of a cup and the second end away from acetabular outer cup 10 rim of a cup, and the medial extremity of the second end of pressure hook 11 protrudes from the inner surface of acetabular outer cup 10 in a free state.This structure makes power outside to pressure hook 11 1 while liner 20 is pressed into acetabular outer cup 10, and namely pressure hooks the power hammering into skeleton.
As shown in Figure 1, in the technical scheme of the present embodiment, the medial extremity of the second end of pressure hook 11 has knuckle 113.The structure of knuckle 113 ensure that acetabular outer cup 10 coordinates more smooth and easy with liner 20.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.