CN208404802U - Oversleeve in a kind of marrow - Google Patents

Abstract

The utility model relates to oversleeves in a kind of marrow, oversleeve top and bottom are oval face in marrow, upper ellipse face is less than lower oval face, the antetheca radian of oversleeve is less than rear wall radian in marrow, two walls front and two sidewalls are step structure, one layer of trabecular bone structure is equipped on two walls front and two side walls, taper connector is equipped on lower oval face, a rectangular preiection is symmetrically arranged in taper connection port, two rectangular preiection faces correspond respectively to the front face and rear surface of oversleeve in marrow, circular hole is equipped on upper oval face, one section of internal screw thread is equipped in circular hole, circular hole is communicated with taper connection port.Effect is: cooperation broach, condyle of femur patch, lateral femoral condyle prosthesis knee use, and the initial stability and long-time stability of inner matter or prosthese can be greatly improved, so as to effectively reduce the mechanical complications of inner matter or prosthese.

Description

Oversleeve in a kind of marrow

Technical field

The utility model relates to oversleeve in a kind of marrow, be for femur condyle is primary or metastatic tumo(u)r excision Limb preservation, Structural bone defect caused by revision procedure after severe trauma bone repair, knee prosthesis is matched when rebuilding condyle of femur structure Oversleeve in the marrow used is covered, it can be used with internal fixation devices collaborations such as intramedullary needle, assembly type prosthese, surrounding steel plates.

Background technique

With the development of surgery operating technology, the innovation of tumor imaging technology and the expansion of new adjuvant chemotherapy technology, Limb-sparing surgery has become the mainstream treatment method of malignant bone tumor；Meanwhile the structural bone defect that severe trauma, inflammation are formed faces It is also required to be rebuild to restore limb function on bed.Bone tumour is apt to occur in the good hair part of distal femur and metastatic carcinoma, with Protect the development of limb technology, tumour joint reconstruction limbs have become main guarantor's limb mode.But the characteristics of because of oncotherapy Cause tumour prosthetic designs huge, bone and surrounding soft tissue's excision are extensive.The present of the treatment of tumour in multidisciplinary high speed development It, treatment level and technology have had significant progress.But there is lag in the development of existing tumour prosthese, many times Because must not the normal bone of few cut-out without suitable tumour prosthese.It is huge for certain special tumour such as bones The treatment of cytoma, surgical excision range can control within 5cm, but because without suitable prosthese, often The normal bone of 10cm or more is also cut off in prosthese reconstruction operations, and giant cell tumor of bone patient is mostly youth, it is contemplated that survival Phase is longer, stronger for the dependence in joint, and more bones retain the validity period that may extend prosthese, in some instances it may even be possible to reduce The number of operation, stabilization and function these removed normal bones for prosthese be it is most valuable, although clinical use The technology of homogeneous allogenic bone or autologous bone transplanting is coped with, but its effect is all unsatisfactory, and will increase some additional Complication.Aspect is overhauled in wound repair and prosthese, the use of tumour prosthese is also required to often to complete to treat, but is similarly The huge prosthetic component of placement must cut off normal bone more, although this can solve problem at the moment, long-term stabilization Property be also affected because excessive bone is cut off.The root of problem is that the demand of design and the treatment of prosthese does not match.In knee On condyle of femur and tibial plateau lower section is the region ignored in prosthese in joint, specifically for the artificial of femur condyle displacement Prosthese and reconstruction component.

It mainly include cement reaction and biological fixation two ways for the fixed form in joint prosthesis's prosthese, The former is postoperative can to restore limb function in short term, but medium-long term prosthese crash rate is higher, and there is the wind for bone cement disease occur Danger.Failure mode shows as aseptic loosening, fracture, dislocation etc.；There are the possibility of Bone Ingrowth for the mode of biological fixation, can improve Long-term stability in prosthese, but initial stability is not high, the influence factor for being grown into degree by the later period is more.Although the latter deposits Increasingly received by patient and doctor in some drawbacks but this fixed form, is the hot spot of research.

Summary of the invention

The technical problem to be solved by the utility model is to for currently without specifically for femur condyle bone structure defect The complication such as prosthetic loosening, fracture, surrounding fracture caused by the artificial prosthesis and component and Biomechanical factor of reconstruction occur Rate is high, the short deficiency of prosthese service life, needs to develop a kind of artificial prosthesis rebuild for condyle of femur, and oversleeve is special in marrow For the artificial prosthesis component of condyle of femur unique shape design, the marrow inner sleeve close with cortex inner cavity form on condyle of femur is provided Sleeve, for various wounds, tumour and when skeleton animation caused by condyle of femur bony defect situation, and intramedullary nail, knee is cooperated to close Section prosthese is used in conjunction with, and the initial stability and long-time stability of inner matter or prosthese can be greatly improved, so as to effective Reduce the mechanical complications of inner matter or prosthese.

To achieve the above object, used technical solution is the utility model: oversleeve in a kind of marrow, it is characterised in that: Oversleeve top and bottom are oval face in the marrow, and upper ellipse face is less than lower oval face, and the antetheca radian of oversleeve is small in marrow In rear wall radian, two walls front and two sidewalls are step structure, and it is small to be equipped with one layer of bone on two walls front and two side walls Girder construction is equipped with taper connector on lower oval face, a rectangular preiection, two rectangles is symmetrically arranged in taper connection port Crowning corresponds respectively to the front face and rear surface of oversleeve in marrow, and circular hole is equipped on upper oval face, is equipped with one in circular hole Section internal screw thread, circular hole are communicated with taper connection port.

The beneficial effects of the utility model are:

The structure of broach oversleeve designs, and is the shape that we are obtained by morphometry strong in cortex on Normal condyle of femur State data and statistical classification and formulate, it is more in line with the cortex inner cavity form in region on normal population condyle of femur, with trapezoidal Based on structure, more matched effect can get.When oversleeve is inserted into femur condyle in marrow, the compressed cancellous bone of surrounding can be with It fills up gap around and preferably contacts enhancing and put heavy function, while stable press-fitting can provide the anti-spin of high intensity, mechanics On can increase anti-rotation, the ability of stretch-proof can also reduce the complication of prosthese.Two walls front and two sidewalls are ladder-like Structure, it is this to design the demand that can satisfy various osteotomy height, it can be connected as extendible portion when osteotomy is excessive, osteotomy is few When can choose big-and-middle small size suitable partial insertion cortex chamber, play anti-rotation and increase steady effect, in addition the bone trabecula knot on surface Structure stimulates the growth of bone bridge, the effect of real stable dispersion stress.The two card slot occlusions of two rectangular preiections and lateral femoral condyle prosthesis Structure plays the prevention and conduction rotated when being used in conjunction with prosthese, so that strength stable allocation avoids collection from interrupting between component The generation split.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the side view of the utility model；

Fig. 3 is the top view of the utility model；

Fig. 4 is the bottom view of the utility model；

Fig. 5 is the structural schematic diagram of broach；

Fig. 6 is the structural schematic diagram of condyle of femur patch；

Fig. 7 is the top view of oversleeve in marrow；

Fig. 8 is the bottom view of oversleeve in marrow；

Fig. 9 is the main view of lateral femoral condyle prosthesis；

Figure 10 is the side view of the utility model lateral femoral condyle prosthesis；

The usage state diagram of Figure 11 the utility model.

Specific embodiment

It is right with reference to the accompanying drawing to make those skilled in the art more fully understand the technical solution of the utility model Specific embodiment of the present utility model is described further:

As shown in Figures 1 to 4, oversleeve in a kind of marrow, 1 top and bottom of oversleeve are oval face in marrow, and upper ellipse face is small In lower oval face, the antetheca 1-1 radian of oversleeve 1 is less than rear wall 1-2 radian in marrow, and two walls front and two sidewalls are ladder-like Structure is equipped with one layer of trabecular bone structure on two walls front and two side walls, is equipped with taper connector 1-3 on lower oval face, A rectangular preiection 1-3-1 is symmetrically arranged on 1-3 mouthfuls of taper connector, two faces rectangular preiection 1-3-1 correspond respectively in marrow The face antetheca 1-1 and the face rear wall 1-2 of oversleeve are equipped with circular hole 1-4 on upper oval face, are equipped with one section of internal screw thread in circular hole 1-4, Circular hole 1-4 is communicated with 1-3 mouthfuls of taper connector.

The material of oversleeve 1 is titanium alloy in marrow.

As shown in Fig. 5 to Figure 11, the application method of oversleeve in a kind of marrow:

By taking tumour as an example, first after the bone and tissue of tumor resection invasion, expands marrow device using speciality and expand femur Distal section pulp cavity in dry uses dedicated expansion marrow device on condyle of femur to expand marrow after completing pulp cavity expansion marrow, and selection is bigger than maximum expansion marrow diameter Oversleeve 1 in marrow is spirally connected by oversleeve 1 in the broach 2 and marrow of 2mm by circular hole 1-4 internal screw thread and the cooperation of 2 external screw thread 2-1 of broach It on broach 2, is inserted on pulp cavity and condyle after connection by expansion pith cavity, after the insertion of oversleeve 1 sclerotin reaches requirement in marrow, needs to check Whether can extract or exist easily and shake, reach stablizing effect if it cannot extract easily and shaking also is not present, utilize broach 2, in marrow the shape of oversleeve 1 and skeletal shape perfect matching, two are under press-fitting and reach stable, and long for long-term biology Enter to provide basis, because the shape of oversleeve 1 has good anti-rotation effect in marrow.

Selection and the matched lateral femoral condyle prosthesis 4 of oversleeve 1 in marrow and suitable condyle of femur patch 3 in vitro, in condyle of femur Condyle of femur is inserted in by the hole 3-5 of condyle of femur patch 3 again after Cement is smeared on patch 3 front 3-1 and two inclined-plane 3-2 On the central axis 4-1 of prosthese 4, the anteromedial surface 4-2 of 3-1 and lateral femoral condyle prosthesis 4 before condyle of femur patch 3 is made to realize gapless Contact, two inclined-plane 3-2 of condyle of femur patch 3 realize with the preceding 4-3 and rear medial surface 4-4 below of lateral femoral condyle prosthesis 4 respectively Gapless contact, then lateral femoral condyle prosthesis 4 is passed through into 1 taper connector 1-3 of oversleeve in 3 tapered hole 3-3 of condyle of femur patch and marrow Cone is fixed in marrow the taper connector 1-3 on oversleeve 1, making the central axis 4-1 of lateral femoral condyle prosthesis 4 be inserted into oversleeve 1 in marrow with cooperation In mouthful, two rectangular preiection 1-3-1 of taper connector 1-3 are installed in two card slot 4-1-1 of central axis 4-1.

It is assembled finally by the connecting shaft hole 4-5 in lateral femoral condyle prosthesis 4 with shin bone partial joint accessory common in clinic, It is combined into mobilizable knee-joint prosthesis.

The structure of several soft tissue reconstruction hole 3-4 of 3 two sides of condyle of femur patch designs, can flexible reconstruction of knee it is residual The start-stop points such as ligament and muscle Quadriceps mechanism are stayed, can be used as the start-stop point booster action of reconstruction.

In the case where above connection and assembling installation, all parts are all very matched to be mounted on bone, and for knee The compression that is likely to occur under joint part active characteristics, traction, rotation stress can conduct between prosthese and sclerotin well, Imitation body biomechanics feature as far as possible, avoids the generation of complication.

It is based on the research to anatomical structure that the design and development of prosthese, which improve,.Clinic prosthese is mostly with Caucasian at present Kind anatomical data be used as foundation, prosthese model setting is wanting in consideration for other races, Asia it is this distinguish more Obviously.Be directed to knee-joint prosthesis there are the problem of we have learnt the anatomical study in domestic and international knee joint peripheral region, although There are many anatomical study for being directed to knee joint and prosthese axis, but are unfortunately directed to very much the area 5cm above distal femur kneecap road Domain lacks independent research.Existing research is concentrated mainly on the dissection of the anatomic form research and femoral bone cavitas medullaris for articular surface Research.It can be that inner matter studies less region in the region 5cm above distal femur kneecap road, and be directed to and knee tumor biology The design of the type prosthese region can play an important role.Region refers to above kneecap slideway on usually said condyle of femur The region 5cm or so, whole feature be, global shape is become that irregular class is trapezoidal, and two sides are uneven from similar round from the near to the distant It expands, cortex bone is more and more weaker, and cancellous bone is more and more abundant, and pulp cavity fades away, and until kneecap road, linking is articular surface.In order to It can instruct the purpose of design and the research and development of tumour knee joint femoral distal component.It is directed to interested in bion knee-joint prosthesis Cortex internal layer (including cancellous bone and pulp cavity mixture) morphosis, our distal femur CT scan datas to health adult 82 measure, and carry out bone emulation using three-dimensional reconstruction software mimics17.0 and rebuild, reuse Solidwork software Processing and imitative cutting, select index and measure, data result is for statistical analysis using SPSS20.0, by cortex internal layer form Characteristic index, systematization.Use for reference near end of thighbone pulp cavity classical taxonomy method, we according to the index picked out as classification according to According to.It is divided into A: accounts for 5% train of dress shape, B: accounts for 90% button flowerpot shape, the tile hat shape of C:5%.Wherein detain the similar ladder of flower bathtub construction Shape, this is main distribution pattern in normal population, be transformed into production it is upper we design marrow inner sleeve based on trapezium structure Sleeve, this special shape component designed according to our result of study can obtain more perfect bone matching effect.

Claims (1)

1. oversleeve in a kind of marrow, it is characterised in that: oversleeve (1) top and bottom are oval face in the marrow, and upper ellipse face is small In lower oval face, antetheca (1-1) radian of oversleeve (1) is less than rear wall (1-2) radian in marrow, and two walls front and two sidewalls are Step structure is equipped with one layer of trabecular bone structure on two walls front and two side walls, connects on lower oval face equipped with taper Head (1-3), is symmetrically arranged with a rectangular preiection (1-3-1), two rectangular preiection (1-3-1) faces on taper connector (1-3) mouth The antetheca face (1-1) and the face rear wall (1-2) for corresponding respectively to oversleeve in marrow are equipped with circular hole (1-4) on upper oval face, circular hole One section of internal screw thread is equipped in (1-4), circular hole (1-4) is communicated with taper connector (1-3) mouth.