Acetabular componentTechnical field
The present invention relates to artificial prosthesis technical field, in particular to a kind of acetabular component.
Background technology
Acetabular component is to apply to a kind of implant in current orthopaedics hip replacement, it is adaptable to human body acetabular bone positionReparation and reconstruction.Its prothesis implant body femoral head with human femur under loading side, femoral stem collectively constitute a set of hip prosthesises.ShouldPlant acetabular component to be typically to be assembled by outer cup and liner to form.The biotype outer surface of its outer cup and the bone in Human Physiology acetabular bone faceMatter fits to form bone interface, and inner surface and the femoral head routing motion in femur side prosthesis of liner form joint-friction face.So as to realize the joint motions after being implanted into.
In prior art, acetabular outer cup with the mode of skeletal fixation is：Screw is fixed, i.e., first acetabular outer cup is placed onOn skeleton, screw-driving is used.On initial stability, screw fixation operation is not very convenient, has certain operation difficulty, also holdsEasily nail is twisted and causes partially to fix insecure, and the connection of the fixation of acetabular outer cup and skeleton, acetabular outer cup and liner is divided to twoStep is carried out, and it is loaded down with trivial details that this not only result in Connection Step, but also initial stability can be made poor.
The content of the invention
Present invention is primarily targeted at a kind of acetabular component is provided, to solve acetabular outer cup of the prior art and skeletonFixation do not allow easy to 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 includes：Acetabular outer cup, pressure are hooked and liner.HipMortar outer cup has avoidance breach；The first end that pressure is hooked is connected to avoidance indentation, there, presses the second end for hooking with towards acetabular outer cupThe outboard end in outside and towards the medial extremity on the inside of acetabular outer cup, outboard end has a tip, presses the tip for hooking in a free stateThe outer surface of acetabular outer cup is not protruded from；Liner is hooked to match somebody with somebody with pressure and merges and tip can be pressed out to outside acetabular outer cup.
Further, pressure is hooked and is provided with pressure hook double wedge towards on the side of the inside of acetabular outer cup, is set on liner lateral surfaceBe equipped with and the liner double wedge that double wedge coordinates hooked with pressure, liner is fixed in acetabular outer cup after pressure hook double wedge and the cooperation of liner double wedge.
Further, avoid breach and pressure hook is multiple and arranges correspondingly.
Further, avoid breach and pressure is hooked and is distributed along acetabular outer cup same level even circumferential.
Further, tip is wedge shaped.
Further, the inner surface of acetabular outer cup be the conical surface and bottom surface be arc, liner is adapted with acetabular outer cup.
Further, it is the ratchet for cooperating that pressure hooks double wedge and liner double wedge.
Further, liner double wedge is in a ring.
Further, the medial extremity at the second end that pressure is hooked protrudes from the inner surface of acetabular outer cup in a free state.
Further, the medial extremity at the second end that pressure is hooked has knuckle.
Using technical scheme, acetabular outer cup is arranged on skeleton, and liner is arranged in acetabular outer cup.InstallingDuring, extruding pressure while coordinating is hooked liner with acetabular outer cup, and pressure hook squeezes out acetabular outer cup.As pressure is hooked with pointHead, tip hammer into skeleton while being extruded acetabular outer cup, form incipient stability.
Description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, and the present invention's showsMeaning property embodiment and its illustrated for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the acetabular outer cup schematic diagram of the embodiment of acetabular component of the invention；And
Fig. 2 shows the liner schematic diagram of the embodiment of the acetabular component of Fig. 1.
Wherein, above-mentioned accompanying drawing includes the following drawings labelling：
10th, acetabular outer cup；11st, pressure is hooked；111st, pressure hooks double wedge；112nd, tip；113rd, knuckle；20th, liner；21st, it is interiorLining double wedge.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phaseMutually combine.Below with reference to the accompanying drawings and in conjunction with the embodiments describing the present invention in detail.
As depicted in figs. 1 and 2, the acetabular component of the present embodiment includes：Acetabular outer cup 10, pressure hook 11 and liner 20.Acetabular boneOuter cup 10 has avoidance breach.Pressure hooks 11 first end and is connected to avoidance indentation, there, and the second end of pressure hook 11 is with towards acetabular boneOutboard end on the outside of outer cup 10 and towards the medial extremity on the inside of acetabular outer cup 10, outboard end have tip 112, and pressure hooks 11 tip112 outer surfaces for not protruding from acetabular outer cup 10 in a free state.Liner 20, liner 20 hook 11 with merge can be tip with pressure112 are pressed out to outside acetabular outer cup 10.
Using the technical scheme of the present embodiment, acetabular outer cup 10 is arranged on into precalculated position, liner 20 is arranged on outside acetabular boneIn cup 10.Acetabular outer cup 10 has avoidance breach, and pressure hooks 11 and is arranged on avoidance indentation, there.During installation, liner 20 withExtruding pressure while coordinating of acetabular outer cup 10 hooks 11, and pressure hooks 11 tip 112 and is squeezed out acetabular outer cup 10.112 quilt of tipCan hammer in skeleton during extrusion acetabular outer cup 10, so as to form incipient stability.
As shown in figure 1, it is the through hole being arranged on acetabular outer cup 10 to avoid breach.In the present embodiment, through hole is rectangleHole.Certainly, one skilled in the art will appreciate that the shape that the shape of through hole hooks 11 with pressure as much as possible is adapted, the shape of through holeCan be determined according to the shape of pressure hook 11.
As shown in figure 1, in the technical scheme of the present embodiment, pressure hooks 11 and sets towards on the side of the inside of acetabular outer cup 10Being equipped with pressure and hooking double wedge 111, be provided with 20 lateral surface of liner and the liner double wedge 21 that double wedge 111 coordinates hooked with pressure, pressure hooks double wedge 111Liner 20 is made to be fixed in acetabular outer cup 10 after coordinating with liner double wedge 21.Said structure is conducive to liner 20 and acetabular outer cup 10Fast locking is formed, and then causes acetabular outer cup 10 incipient stability quickly to be formed with bone bed, it is ensured that outside liner 20 and acetabular boneCup 10 assemble and acetabular outer cup 10 the surgical effect that settles at one go of incipient stability.
In the technical scheme of the present embodiment, avoid breach and pressure hooks 11 and is multiple and arranges correspondingly, it is multiplePressure hooks 11 and can fully ensure that acetabular outer cup 10 firmly together with bone-contact.
As shown in figure 1, in the technical scheme of the present embodiment, cylindrical uniform point along 10 same level of acetabular outer cup of through holeCloth.Equally distributed structure causes 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 wedge shaped, wedge structure not only causes tip112 hammer into skeleton relatively easily but also acetabular outer cup 10 can be made more firm in combination with 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 arcShape, liner 20 are adapted with acetabular outer cup 10.This structure had both met the cooperation of acetabular outer cup 10 and liner 20, was easy to again addWork.
As depicted in figs. 1 and 2, in the technical scheme of the present embodiment, it is phase interworking that pressure hooks double wedge 111 and liner double wedge 21The ratchet of conjunction.This structure is easily worked, and the structure of ratchet is barb, is not readily disengaged 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 located on pressure hook 11, and liner is convexTooth 21 is circumferentially distributed in 20 outer wall of liner and is annular.Only pressure hooks the structure on 11 with pressure hook double wedge 111 and causes outside acetabular boneCup 10 and liner 20 are very easily locked in together.And the liner double wedge 21 of liner 20 is ensure that outside acetabular bone for the structure of annularEven if cup 10 and liner 20 occur relatively rotate also without departing from.
As shown in figure 1, in the technical scheme of the present embodiment, pressure hooks 11 includes the first end near 10 rim of a cup of acetabular outer cupWith the second end away from 10 rim of a cup of acetabular outer cup, the medial extremity at the second end for hooking 11 is pressed to protrude from acetabular outer cup in a free state10 inner surface.This structure causes to hook 11 1 outside power to pressure while liner 20 is pressed into acetabular outer cup 10, i.e., pressure is hookedHammer into the power of skeleton.
As shown in figure 1, in the technical scheme of the present embodiment, pressure hooks the medial extremity at 11 the second end knuckle 113.The structure of knuckle 113 ensure that acetabular outer cup 10 coordinates more smooth with liner 20.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this areaFor art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repairChange, equivalent, improvement etc., should be included within the scope of the present invention.