CN102813565B

CN102813565B - Artificial hip joint

Info

Publication number: CN102813565B
Application number: CN201210294102.XA
Authority: CN
Inventors: 尚鹏; 白雪岭; 卢俊哲
Original assignee: Shenzhen Research Institute Tsinghua University
Current assignee: Shenzhen Research Institute Tsinghua University
Priority date: 2012-08-18
Filing date: 2012-08-18
Publication date: 2015-02-25
Anticipated expiration: 2032-08-18
Also published as: CN102813565A

Abstract

The invention relates to an artificial hip joint matched with anatomical features of Chinese hip joints. The artificial hip joint comprises a femoral stem, a spherical head, an acetabular inner lining and an acetabular outer lining, wherein the femoral stem consists of a stem head, a stem neck and a stem body which is inserted into a femoral cavity; the spherical head consists of a sphere, a spherical outer surface and an inner cone frustum, wherein the spherical outer surface is matched with the inner surface of the acetabular inner lining, and the inner cone frustum is dent inwards along the horizontal end face of the spherical head and is used for containing the stem head of the femoral stem; the acetabular inner lining consists of a cylinder bottom frustum, a frustum, an opening and a polished spherical inner surface, wherein the frustum is formed by matching a cylinder top with the acetabular outer lining; the opening is concavely arranged at the peripheral edge of the high end of the frustum and is used for rotating the acetabular inner lining so as to adjust a positioning acetabular cup; and the polished spherical inner surface matched with the outer surface of the shpere is concavely arranged along the frustum and a cone; and the acetabular outer lining consists of a hemisphere, pawls, a frustum inner surface, shrinkage pools and a plurality of grooves, wherein the hemisphere is formed by spherical surfaces fitted with pelvises; the pawls are arranged on the outer circumferential wall of the horizontal end face, on which the hemisphere is located; the horizontal end face of the frustum inner surface is dent inwards to contain the acetabular inner lining; the shrinkage pools are located on the frustum inner surface located at the bottom part of the hemisphere and are used for fixing the acetabular outer lining and the pelvises; and the grooves are concavely arranged at the outer edge of the wall of the frustum inner surface located on the horizontal end face.

Description

Artificial hip joint

Technical field

The present invention relates to a kind of artificial joint, particularly a kind of artificial hip joint.

Background technology

Artificial joint replacement is one of most important progress of obtaining at twentieth century of field of orthopaedics, current artificial joint replacement has been widely used in the disease for the treatment of shoulder joint, elbow joint, carpal joint, interphalangeal joint, hip joint, knee joint and ankle joint etc., is invest one of maximum, that development and change are the most outstanding field in orthopedia over nearly 30 years.Wherein general with marrow joint, be replaced as power more than 90% over nearly 10 years, extensively apply clinically, it is made and can only walk by dependance on walking stick over, and even disabled arthritic patients realizes the dream of walking freely.

Artificial joint replacement is comprising China's popularity.The main external manufacturer of a few family occupies the market share of whole artificial joint market more than 60%, and as Depuy, Zimmer, Smith & Nephew, the brand products such as Stryker are the products that in joint replacement surgery, doctor the most often uses.Domestic artificial joint product mostly is that the technical parameter of reference inlet port joint product is imitated to be formed, although also occupy certain market share, due to technique with lack Innovation Input, makes a lot of doctor and is not inclined to selection, only for the consideration of price.

But the joint product of American-European manufacturer, by the design of west ethnic group, is partial to anatomical features and the living habit of westerner.Due to compatriots and Western patients ethnic group and cultural in different, cause hip joint in anatomic form, daily behavior action and body mechanics's characteristic etc., there is comparatively significant difference, medical circle generally reflects that existing USA and Europe artificial joint product can not adapt to the needs of domestic patient well.

State's human femur geometric parameter and white people have significant difference, such as: the parameters such as femur/Pulp chamber curve, offset, late-segmental collapse position and greater trochanter point level height spacing, collodiaphyseal angle, acetabulum, angle of splay exist notable difference, and these parameters decide the design/arrangement etc. of biomechanical properties feature, Ying You position, artificial thigh bone center, acetabular component.Due to the hip joint parameter designing that import artificial hip joint product is according to west ethnic group, anatomical compatibility can not be formed with by district's skeleton as a rule, therefore require that doctor should note difference between prosthese and state's human femur when carrying out import hip replacement to compatriots.

Summary of the invention

The object of this invention is to provide the artificial hip joint matched with compatriots' hip joint anatomical features.

Technical solution of the present invention is described artificial hip joint, its special character is: the coated setting acetabular liner of hemispheric acetabulum outside liner inner chamber, suit bulb in the polishing Internal Spherical Surface of acetabular bone liner indent, be set with femoral stem in the inner circle frustum of bulb indent molding, thus be shaped to the bionic hip-joint mated with compatriots' hip joint anatomic form.

As preferably: described femoral stem by be configured to the frustum of a cone negative winding stem, with negative winding stem one-body molded be configured to cylinder both sides milling flat handle cervical region, form for the handle body inserted in femoral cavity.

As preferably: described negative winding stem by wedge shape and with the handle body near-end of compatriots' femoral bone cavitas medullaris anatomical features matching curves, in handle body proximal face recessed for operation tool is installed and be convenient to type femoral bone end prosthesis insert screwed hole, the pawl of the outer wall molding of handle body near-end, the hydroxyapatite coating layer that handle body near-end is provided with, handle body near-end one elongation moulding and the handle body far-end of outer wall polishing, the joint portion of handle body near-end and handle body far-end is provided with the through hole running through handle body far-end vertically and forms.

As preferably: the horizontal end face that described bulb is milled out by polishing spheroid, the outside sphere coordinated with acetabular bone liner inner surface, spheroid, to form along the molding of spheroid horizontal end face indent for receiving the inner circle frustum of femoral stem head.

As preferably: the vertebra platform that described acetabular bone liner is matched with acetabulum outside liner by the vertebra platform of molding bottom cylinder, cylinder, the molding of cylinder top, the high-end periphery of vertebra platform along recessed for rotate acetabular bone liner with adjust locate acetabular cup gap, along vertebra platform and to go deep into vertebral body recessed for coordinate with described outer surface of spheroid and for receiving the polishing Internal Spherical Surface of described bulb spherical outside surface to form.

As preferably: described acetabular bone liner polyetheretherketonematerials materials is made.

As preferably: the outer circle wall that the hemisphere that described acetabulum outside liner is made up of the sphere of pelvis of fitting, hemisphere are positioned at horizontal end face to be provided with for fastening pawl, horizontal end face indent for receiving the secondary frustum inner surface of acetabular bone liner, the frustum inner surface be positioned at bottom hemisphere is provided with some shrinkage pools for fixing acetabulum outside liner and pelvis, some grooves of being positioned at the outer rim of horizontal ends face cone platform inner wall surface recessed form.

Another technical solution of the present invention is described artificial hip joint, and its special character is, comprising:

Femoral stem, by be configured to the frustum of a cone negative winding stem, with negative winding stem one-body molded and be configured to cylinder both sides milling flat handle cervical region, form for the handle body inserted in femoral cavity;

Bulb, the horizontal end face milled out, forms along the molding of spheroid horizontal end face indent for receiving the inner circle frustum of femoral stem head by polishing spheroid, the outside sphere coordinated with acetabular bone liner inner surface, spheroid;

Acetabular bone liner, the vertebra platform matched with acetabulum outside liner by the vertebra platform of molding bottom cylinder, cylinder, the molding of cylinder top, the high-end periphery of vertebra platform along recessed for rotate acetabular bone liner with adjust locate acetabular cup gap, along vertebra platform and to go deep into vertebral body recessed for coordinate with described outer surface of spheroid and for receiving the polishing Internal Spherical Surface of described bulb spherical outside surface to form;

Acetabulum outside liner, the outer circle wall that the hemisphere, the hemisphere that are made up of the sphere of laminating pelvis are positioned at horizontal end face to be provided with for fastening pawl, horizontal end face indent for receiving the secondary frustum inner surface of acetabular bone liner, the frustum inner surface be positioned at bottom hemisphere is provided with some shrinkage pools for fixing acetabulum outside liner and pelvis, some grooves of being positioned at the outer rim of horizontal ends face cone platform inner wall surface recessed form.

Compared with prior art, advantage of the present invention or good effect:

(1) handle body near-end has hydroxyapatite coating layer, promotes that osteogenesis makes femoral stem have Biostatic after certain hour; The polishing of handle body far-end height, reduce and coefficient of friction between pulp cavity, handle body near-end curve and compatriots' pulp cavity anatomical structure match.

(2) bulb diameter is constructed to be applicable to the larger range of activity of hip joint.

(3) bulb is high polishing, reduces the coefficient of friction between bulb and acetabular bone liner.

(4) acetabulum outside liner has the configuration for pelvis sphere of fitting, and the outer surface of acetabulum outside liner has the pawl for fastening effect, is not drawn out easily after press-in pelvic tissue.

Accompanying drawing explanation

Fig. 1 is the Facad structure schematic diagram of artificial hip joint femoral shaft of the present invention.

Fig. 2 is the side structure schematic diagram of artificial hip joint femoral shaft of the present invention.

Fig. 3 is the axonometric chart of artificial hip joint femoral shaft of the present invention.

Fig. 4 is the Facad structure schematic diagram of the artificial hip joint bulb of the present invention.

Fig. 5 is the side structure schematic diagram of the artificial hip joint bulb of the present invention.

Fig. 6 is the axonometric chart of the artificial hip joint bulb of the present invention.

Fig. 7 is the front view of artificial hip joint acetabular bone liner of the present invention.

Fig. 8 is the top view of artificial hip joint acetabular bone liner of the present invention.

Fig. 9 is the axonometric chart of artificial hip joint acetabular bone liner of the present invention.

Figure 10 is the front view of artificial hip joint acetabulum outside liner of the present invention.

Figure 11 is the side view of artificial hip joint acetabulum outside liner of the present invention.

Figure 12 is the axonometric chart of artificial hip joint acetabulum outside liner of the present invention.

Figure 13 is artificial hip joint installation diagram of the present invention.

Figure 14 is artificial hip joint assembling stereogram of the present invention.

Primary clustering symbol description:

Femoral stem 1, negative winding stem 11, handle cervical region 12, milling flat 121, handle body 13, handle body near-end 131, pawl 1311, handle body far-end 132, screwed hole 133, through hole 134, bulb 2, spherical outside surface 21, horizontal end face 22, acetabular bone liner 3, cylinder 31, cone platform 32, vertebra platform 33, gap 34, Internal Spherical Surface 35, acetabulum outside liner 4, hemisphere 41, pawl 411, first order frustum inner surface 42, second level frustum inner surface 43, shrinkage pool 44, groove 45.

Detailed description of the invention

The present invention is further detailed in conjunction with the accompanying drawings below:

Described artificial hip joint comprises: femoral stem 1, bulb 2, acetabular bone liner 3, acetabulum outside liner 4.

Refer to shown in Fig. 1 ~ Fig. 3, described femoral stem 1 by be configured to the frustum of a cone negative winding stem 11, with negative winding stem 11 one-body molded and be configured to cylinder both sides milling flat 121 handle cervical region 12, form for the handle body 13 inserted in femoral cavity (not shown).Described negative winding stem 11 by wedge shape and with the handle body near-end 131 of Chinese's femoral bone cavitas medullaris (not shown) anatomical features matching curves, on handle body near-end 131 end face recessed for operation tool is installed and be convenient to type femoral bone end prosthesis insert screwed hole 133, the pawl 1311 of the outer wall molding of handle body near-end 131, the hydroxyapatite coating layer (not shown) that handle body near-end 131 is provided with, handle body near-end 131 one elongation moulding and the handle body far-end 132 of outer wall polishing, handle body near-end 131 is provided with the joint portion of handle body far-end 132 through hole 134 running through handle body far-end 132 vertically and forms.

Referring to shown in Fig. 4 ~ Fig. 6, the horizontal end face 22 that described bulb 2 is milled out by polishing spheroid, the spherical outside surface 21 coordinated with acetabular bone liner inner surface, spheroid, to form for receiving the inner circle frustum 23 of femoral stem head 11 along the molding of spheroid horizontal end face 22 indent.

Refer to shown in Fig. 7 ~ Fig. 9, the vertebra platform 33 that described acetabular bone liner 3 is matched with acetabulum outside liner by the cone platform 32 of molding bottom cylinder 31, cylinder 31, cylinder 31 top molding, the high-end periphery of vertebra platform 33 along recessed for rotate acetabular bone liner 3 with adjust locate acetabular cup gap 34, along vertebra platform 33 and to go deep into vertebral body 31 recessed for coordinate with described outer surface of spheroid 21 and for receiving the polishing Internal Spherical Surface 35 of described bulb spherical outside surface 21 to form, described acetabular bone liner 3 is made by polyetheretherketonematerials materials.The angle with Chinese's Acetabular dissection match parameters is provided with between described vertebra platform 33 axis and acetabular cup outer rim plane (not shown).

Three grooves 45 refer to shown in Figure 10 ~ Figure 12, the outer circle wall that hemisphere 41, hemisphere 41 that described acetabulum outside liner 4 is made up of the sphere of laminating pelvis are positioned at horizontal end face to be provided with for fastening pawl 411, horizontal end face indent for receiving the secondary frustum inner surface 42 and 43 of acetabular bone liner 3, the frustum inner surface 43 be positioned at bottom hemisphere 41 is provided with some four shrinkage pools 44 for fixing acetabulum outside liner 4 and pelvis, being positioned at the outer rim of horizontal ends face cone platform inner wall surface recessed form.

Described artificial hip joint is applicable to the Chinese or the east ethnic group patient that need whole coxa substitution.

The foregoing is only preferred embodiment of the present invention, all equalizations done according to the claims in the present invention scope change and modify, and all should belong to the covering scope of the claims in the present invention.

Claims

1. an artificial hip joint, it is characterized in that: the coated setting acetabular liner of hemispheric acetabulum outside liner inner chamber, suit bulb in the polishing Internal Spherical Surface of acetabular bone liner indent, be set with femoral stem in the inner circle frustum of bulb indent molding, thus be shaped to the bionic hip-joint mated with compatriots' hip joint anatomic form; Described femoral stem by be configured to the frustum of a cone negative winding stem, with negative winding stem one-body molded and be configured to cylinder both sides milling flat handle cervical region, form for the handle body inserted in femoral cavity; The vertebra platform that described acetabular bone liner is matched with acetabulum outside liner by the vertebra platform of molding bottom cylinder, cylinder, the molding of cylinder top, the high-end periphery of vertebra platform along recessed for rotate acetabular bone liner with adjust locate acetabular cup gap, along vertebra platform and to go deep into vertebral body recessed for coordinate with outer surface of spheroid and for receiving the polishing Internal Spherical Surface of described bulb spherical outside surface to form; Some grooves that the outer circle wall that the hemisphere that described acetabulum outside liner is made up of the sphere of pelvis of fitting, hemisphere are positioned at horizontal end face to be provided with for fastening pawl, horizontal end face indent for receiving the secondary frustum inner surface of acetabular bone liner, the frustum inner surface be positioned at bottom hemisphere is provided with some shrinkage pools for fixing acetabulum outside liner and pelvis, be positioned at the outer rim of horizontal ends face cone platform inner wall surface recessed form.

2. artificial hip joint according to claim 1, is characterized in that: described negative winding stem by wedge shape and with the handle body near-end of compatriots' femoral bone cavitas medullaris anatomical features matching curves, handle body proximal face on recessed for operation tool is installed and be convenient to screwed hole that type femoral bone end prosthesis inserts, hydroxyapatite coating layer that the pawl of outer wall molding of handle body near-end, handle body near-end are provided with, handle body near-end one elongation moulding and the joint portion of the handle body far-end of outer wall polishing, handle body near-end and handle body far-end is provided with the through hole running through handle body far-end vertically forms.

3. artificial hip joint according to claim 1, is characterized in that: the horizontal end face that described bulb is milled out by polishing spheroid, the outside sphere coordinated with acetabular bone liner inner surface, spheroid, form along the molding of spheroid horizontal end face indent for receiving the inner circle frustum of femoral stem head.

4. artificial hip joint according to claim 1, is characterized in that: described acetabular bone liner polyetheretherketonematerials materials is made.

5. an artificial hip joint, is characterized in that, comprising: