CN208770072U - A kind of artificial prosthesis of the adjustable overlapping connection structure in long bone backbone portion - Google Patents

Abstract

The utility model relates to a kind of artificial prosthesis of the adjustable overlapping connection structure in long bone backbone portion.Connection component is fixed by screws in prosthese distal stem and rebuilds on the basal part II of part, one circle teeth II of connection component lower end are engaged with a circle teeth I of II upper end of basal part that distal stem rebuilds part, the interconnecting piece I of prosthese proximal end handle is fixed together with connection component by two screws, I concave surface I of interconnecting piece and convex surface I contact tight fit with the convex surface of connection component II and concave surface II respectively, and I inclined-plane I of interconnecting piece and inclined-plane II correspond respectively to the inclined-plane IV of connection component and inclined-plane III contacts tight fit.Guarantee that prosthese has good initial stability using biological fixation mode, and improves in prosthese, stability at a specified future date, while avoiding the generation of bone cement disease.Prosthese adds to be designed with adjustable structure, is reduced surgical procedure difficulty, is increased the success rate of operation, improve postoperative effect.

Description

A kind of artificial prosthesis of the adjustable overlapping connection structure in long bone backbone portion

Technical field

The utility model relates to a kind of artificial prosthesis of the adjustable overlapping connection structure in long bone backbone portion, are suitable for clinic Middle long bone backbone portion defect reconstruction technical field, specifically, being that be related to long bone of limbs include humerus, ulna, radius, stock Primary or metastatic tumo(u)r excision Limb preservation, the osteotomy hand such as bone defect, severe infections osteomyelitis after severe trauma of bone, shin bone etc. The artificial prosthesis that the structural bone defect in long bone backbone portion caused by art is rebuild.

Background technique

With the progress and development of medical consultations technology, limb-sparing surgery has become the mainstream treatment side of malignant bone tumor at present Method；Meanwhile structural bone defect caused by the factors such as severe trauma, infection be also required to carry out bone tissue reconstruction could restore limbs Function.Bone tumour can theoretically occur at each position, and long bone of limbs be malignant tumour advanced stage common metastasis site it One, according to the difference of happening part, the design and use method of prosthese is also not quite similar.The current research to prosthese mainly collects In knee, hip etc. larger weight-bearing joints, and these large joint prostheses applied in clinic it is relatively broad, and for four limbs The prosthese in long bone backbone portion is few compared with in-depth study.The main development that Limb preservation has become current four limbs bone tumour therapy becomes Gesture, due to the pathological change of bone tumour occupancy, so that being difficult to find the markings of contraposition after tumor section resected bone, so backbone portion Usually there is the rotation deformity of limbs after rebuilding in bone tumour prosthese art, and is difficult later period correction, leads to the long-term function barrier of patient Hinder.Long bone backbone portion prosthese research and development at present relatively lags behind, as shown in Figure 5 and Figure 6, the vacation of the long bone backbone of the prior art Body is using cement reaction mode mostly, and remote, proximal shank portion is cement reaction mode, is needed in art by remote, proximal end backbone Bone cement is injected in pulp cavity, is inserted into remote, proximal end handle, and preferable stability, art just can be obtained in prosthese after bone cement solidification It can restore limb function in short term afterwards；It is more demanding to the operation of prosthese merging but when using cement reaction, it is general to require " disposable accurate " merging prosthese, and prosthese and host bone must be maintained relatively fixed before bone cement is fully cured, because For bone cement once solidifying, prosthese is difficult to be adjusted again, and if before bone cement solidify repeatedly the position of adjusting prosthese or Fail if maintaining prosthese and host bone relatively fixed, the stability of prosthese will be reduced, it is easy to prosthese early stage is caused to loosen, The appearance of the complication such as abjection, sedimentation.In addition, cement reaction mode has the risk that bone cement disease occurs, i.e. bone cement is planted It include a series of clinical conditions such as low blood pressure, arrhythmia cordis, hypoxemia, myocardial infarction, bleeding, asthma attack caused by after entering Shape, cardiac arrest incidence is 0.5%~10% in bone-cement type total hip arthroplasty, and lethality is 0.6%~1.0%.Together When, in cement reaction mode, prosthese crash rate at a specified future date it is higher, failure mode is mainly shown as mechanicalness aseptic loosening, disconnected It splits, dislocate, surrounding bone dissolution, fracture etc., wherein the sterile loosening problem of mechanicalness is the most prominent, and document report incidence is up to 30.6%~42.7%.It can be seen that the prosthese service life of cement reaction is relatively short, the second phase after prosthese failure overhauls hand Art is nearly unavoidable, some cases even need row Repeated Operation just to can solve problem, and the prosthese of cement reaction its The difficulty of prosthese revision procedure is larger, complication is more, and postoperative effect is bad, disability rate is higher.For some expection survival periods The Patients with Bone Tumor of longer youth is especially not suitable for by the way of cement reaction.Likewise, in severe trauma and infection Etc. also usually need backbone portion prosthese to carry out bone tissue reconstruction in the case of long bone of limbs cadre's bone defect caused by reasons, use Similarly there are these drawbacks in cement reaction mode.

Although the prosthese initial stability using biological fixation mode is more far short of what is expected than the effect of cement reaction, due to life The fixed prosthese of object itself has good osteoinductive and Integrated implant, can effectively improve in prosthese, stability at a specified future date, Extend the prosthese service life, lowers the relevant mechanical complications of prosthese, therefore this fixed form of biological fixation is increasingly by patient Received with doctor, and one of the hot spot studied at present and direction.

Summary of the invention

Situation and existing deficiency in view of the prior art, it is adjustable that the utility model provides a kind of long bone backbone portion It is overlapped the artificial prosthesis of connection structure, this prosthese is the more suitable treatment side of guarantor's limb of long bone of limbs backbone tumor patient Case.Fixed form is changed to the biological fixation mode for being more suitable for by the prosthese of the utility model.Although biological fixation mode is initial Stability is poorer than cement reaction, but the later period, its stability can be gradually increased with Bone Ingrowth degree, wherein, stability at a specified future date Be substantially better than cement reaction effect, compared with the prosthese of cement reaction, in the prosthese of biological fixation, long term complication it is few, Long service life, and prosthese revision procedure will be easy very much.It is avoided in art simultaneously using bone water caused by bone cement The generation of mud disease, improves the safety of operation, reduces the risk of death.

The prosthese of the utility model increases connection component and toothed adjustment structure, so that surgical procedure is more people Property and diversification, after fixed in prosthese proximal end handle and distal stem merging host's ossis, can be adjusted by connection component The problem of section is to correct long bone distance end rotation deformity, and can operate repeatedly and be adjusted in art, adjustment process is to vacation Body stability does not have any adverse effect, reduces surgical procedure difficulty, improves success rate of operation and efficiency, improves operation Effect.

To achieve the above object, used technical solution is the utility model: a kind of long bone backbone portion is adjustable heavy The artificial prosthesis of folded connection structure, including prosthese proximal end handle, prosthese distal stem；It is characterized by also including connection components；

Prosthese proximal end handle is made of the shank I of integral structure, the basal part I of reconstruction part and interconnecting piece I, the handle Portion I is thin cylindrical body, and tail end is hemisphere, and the basal part I for rebuilding part is thick cylindrical body, and interconnecting piece I is thick semicylinder；

In the plane of the interconnecting piece I, it is equipped with concave surface I and convex surface I, the upper surface of concave surface I is inclined-plane I, under convex surface I End face is inclined-plane II, and the threaded hole I communicated with I semi circular surface of interconnecting piece is respectively equipped on concave surface I and convex surface I, is being rebuild Partial basal part I is equipped with threaded hole II, and I perpendicular separation of threaded hole II and two threaded hole arranges on one wire, in handle One layer of coarse metal coating is equipped on the periphery of the basal part I in portion I and reconstruction part；

The prosthese distal stem is made of the basal part II of the shank II of integral structure and reconstruction part, and shank II is thin circle Cylinder, tail end are hemisphere, and the basal part II for rebuilding part is thick cylindrical body, on II upper surface of basal part for rebuilding part Lug boss equipped with tubulose is equipped with internal screw thread in the pipe of lug boss, along II upper surface periphery of the basal part setting for rebuilding part One circle teeth I are equipped with one layer of coarse metal coating on the periphery of shank II and the basal part II for rebuilding part；

The lower end of the connection component is hollow cylindrical body, a circle platform is equipped in hollow access opening, hollow Rounded body outside be equipped with a threaded hole, along one circle teeth II of connection component lower end surface periphery setting, along hollow rounded body Face is inclined-plane III；

The upper end of connection component is U-shaped semicircular body, and concave surface II and convex surface II are equipped in U-shaped semicircular body plane, in U-shaped half The counterbore communicated there are two being set outside circle with II slot of concave surface and II slot of convex surface, the screw thread of two counterbores and connection component lower end Hole perpendicular separation arranges on one wire, is inclined-plane IV above U-shaped semicircular body；

The connection component is fixed by screws in prosthese distal stem and rebuilds on the basal part II of part, connection component lower end Circle teeth II and a distal stem rebuild II upper end of basal part of part and one enclose teeth I and engage, the company of prosthese proximal end handle Socket part I is fixed together with connection component by two screws, I concave surface I of interconnecting piece and convex surface I respectively with the convex surface of connection component II and concave surface II contact tight fit, I inclined-plane I of interconnecting piece and inclined-plane II corresponds respectively to the inclined-plane IV of connection component and inclined-plane III connects Touch tight fit.

The coarse metal coating is titanium coating.

The beneficial effects of the utility model are: the basal part and prosthese distal stem of the shank of prosthese proximal end handle, reconstruction part I Shank and rebuild part ii basal part surface, carry out coarse metal coating (such as titanium coating) surface treatment, using life The prosthetic surface of the fixed mode of object, coarse metal coating (such as titanium coating) has preferable osteoinductive and Integrated implant, In prosthese, closely distally insertion backbone closely, in the pulp cavity of distal end by near press-fit reaches good biological type fixed effect, improves vacation In body, stability at a specified future date, extend the prosthese service life, reduce the relevant mechanical complications of prosthese, avoid bone cement disease Occur, improve the safety of operation, reduces patient and dead risk occurs.Combine steel plate and screw fixtation simultaneously, The initial stability for greatly improving prosthese, makes up the deficiency of biological fixation initial stability difference.

The prosthese of the utility model increases connection component and toothed adjustment structure, so that surgical procedure is more people Property and diversification, prosthese proximal end handle and distal stem merging host's ossis in, can be adjusted by connection component to entangle The problem of positive long bone distance end rotation deformity, and can operate repeatedly and be adjusted in art, adjustment process stablizes prosthese Property does not have any adverse effect, reduces surgical procedure difficulty, improves success rate of operation and efficiency, improves surgical effect.

The prosthese of the utility model is close, distal stem shank uses Individual design strategy, and the prosthese of individuation can not only Improve the accuracy of operation, moreover it is possible to improve the therapeutic effect of postoperative prosthese.It is preoperative to be obtained by measurement patient image's data Knub position, size and ossis internal diameter carry out Individual design, and the specific dissection for each patient's lesion bone tissue is tied Structure carries out individuation customization, improves the accuracy of operation and the therapeutic effect of postoperative prosthese.

In short, the prosthese of the utility model is rebuilding being improved for long bone backbone prosthetic designs to currently available technology And optimization: 1, prosthese customization uses the strategy of Individual design, improves the accuracy and aftertreatment effect of operation.2, using life Object fixed form joint steel plate screw is auxiliarily fixed, and not only guarantees that prosthese has good initial stability, but also improve vacation In body, stability at a specified future date, reduce in prosthese, long term complication disease incidence, extend the prosthese service life, reduce the second stage of revision procedure Difficulty, while avoiding the generation of bone cement disease.3, prosthese adds is designed with adjustable structure, and the rotation of limbs can be corrected in art Turn deformity, and adjusting can be repeated, and there is no any adverse effect to the stability of prosthese, reduces surgical procedure hardly possible Degree, increases the success rate of operation, improves postoperative effect.

Detailed description of the invention

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

Fig. 2 is the structural decomposition diagram of the utility model；

Fig. 3 is the structural schematic diagram of the utility model prosthese proximal end handle；

Fig. 4 is the structural schematic diagram of the utility model connection component；

Fig. 5 is the main view of prior art prosthese；

Fig. 6 is the side view of prior art prosthese.

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, the artificial prosthesis of the adjustable overlapping connection structure in a kind of long bone backbone portion, including prosthese Proximal end handle 1, prosthese distal stem 3 further include connection component 2.

Prosthese proximal end handle 1 is made of I 1-2 of basal part and I 1-3 of interconnecting piece of I 1-1 of shank of integral structure, reconstruction part, I 1-1 of shank is thin cylindrical body, and tail end is hemisphere, and I 1-2 of basal part for rebuilding part is thick cylindrical body, I 1-3 of interconnecting piece For thick semicylinder.

In the plane of I 1-3 of interconnecting piece, it is equipped with I 1-3-2 of I 1-3-1 of concave surface and convex surface, the upper surface of I 1-3-1 of concave surface is The lower end surface of I 1-3-3 of inclined-plane, I 1-3-2 of convex surface are II 1-3-4 of inclined-plane, are respectively equipped on I 1-3-2 of I 1-3-1 of concave surface and convex surface One I 1-3-5 of threaded hole communicated with I 1-3 semi circular surface of interconnecting piece is equipped with threaded hole II on I 1-2 of basal part for rebuilding part 1-3-6, II 1-3-6 and two I 1-3-5 perpendicular separation of threaded hole of threaded hole arrange on one wire, in I 1-1 of shank and reconstruction One layer of coarse metal coating 1-3-7 is equipped on the periphery of partial I 1-2 of basal part.

Prosthese distal stem 3 is made of II 3-2 of basal part of II 3-1 of shank of integral structure and reconstruction part, II 3-1 of shank For thin cylindrical body, tail end is hemisphere, and II 3-2 of basal part for rebuilding part is thick cylindrical body；The basal part for rebuilding part II upper surface 3-2 is equipped with the lug boss 3-3 of tubulose, and internal screw thread 3-3-1 is equipped in the pipe of lug boss 3-3, along reconstruction part One circle I 3-4 of teeth of basal part II upper surface 3-2 periphery setting, in II 3-1 of shank and rebuild II 3-2 of basal part of part One layer of coarse metal coating 3-5 is equipped on periphery.

The lower end of connection component 2 is hollow rounded body, a circle platform 2-1 is equipped in hollow access opening 2-9, in It is equipped with a threaded hole 2-2 outside empty rounded body, encloses II 2-3 of teeth along 2 lower end surface periphery of connection component setting one, it is hollow It is III 2-4 of inclined-plane above rounded body.

The upper end of connection component 2 is the hollow semicircular body of U-shaped, and II 2-5 of concave surface and convex surface are equipped in U-shaped semicircular body plane II 2-6, sets that there are two with the counterbore 2-7 of II 2-6 slot of II 2-5 slot of concave surface and convex surface, two heavy respectively outside U-shaped semicircular body The lower thread hole 2-2 perpendicular separation of hole 2-7 and connection component 2 arranges on one wire, is IV 2- of inclined-plane above U-shaped semicircular body 8。

Connection component 2 is socketed in prosthese distal stem 3 to rebuild on II 3-2 of basal part of part, rotates left and right and adjusts connection Component 2 adjusts good position, passes through access opening 2-9 with screw 4 and rebuilds the II 3-2 lug boss 3-3 internal screw thread 3- of basal part of part 3-1 is spirally connected, and connection component 2 is fixed on II 3-2 of basal part for rebuilding part by fastening screw 4, and the lower end one of connection component 2 is enclosed II 2-3 of teeth encloses I 3-4 of teeth with the upper end one for II 3-2 of basal part for rebuilding part and engages.

I 1-3 of interconnecting piece of prosthese proximal end handle 1 is docking together with connection component 2, passes through connection group with two screws 4 Two I 1-3-5 of threaded hole of 2 two counterbore 2-7 of part and I 1-3 of interconnecting piece are spirally connected, and connection component 2 and I 1-3 of interconnecting piece are fixed Together, 1 interconnecting piece of prosthese proximal end handle, I concave surface 1-3, I 1-3-1 and I 1-3-2 of convex surface respectively with II 2-6 of convex surface of connection component 2 Tight fit, the inclined-plane with connection component 2 respectively I inclined-plane 1-3 of interconnecting piece I 1-3-3 and II 1-3-4 of inclined-plane are contacted with II 2-5 of concave surface IV 2-8 and III 2-4 of inclined-plane contacts tight fit.

The threaded hole 2-2 on II 1-3-6 of threaded hole and connection component 2 rebuild on I 1-2 of basal part of part is auxiliary Interal fixation screw hole used when prosthese.

Coarse metal coating (4) is titanium coating.

A kind of application method of the artificial prosthesis of the adjustable overlapping connection in long bone of limbs backbone portion, steps are as follows:

First after the bone and tissue of excision humerus backbone tumor invasion, expand marrow brill respectively to residual using marrow device is expanded Remaining long bone is close, distal end pulp cavity is interior expands pulp cavity, and I 1-1 of shank of prosthese proximal end handle 1 is inserted into proximal humeral pulp cavity after expanding marrow, II 1-3-4 of inclined-plane that prosthese proximal end handle 1 is gently tapped using hammer makes I 1-1 of shank of prosthese proximal end handle 1 in proximal humerus bone Achieve the effect that near press-fit in pulp cavity；By in II 3-1 of the shank insertion distal humerus pulp cavity of prosthese distal stem 3, hammer is used IV 2-8 of inclined-plane for gently tapping prosthese distal end 3, makes II 3-1 of shank of prosthese distal stem 3 reach tight in proximal humerus ossis The effect of close press-fitting；This biological fixation mode using near press-fit can effectively improve in prosthese, stability at a specified future date, extend The prosthese service life lowers the generation of the mechanical complications such as prosthetic loosening, dislocation, the dissolution of Periprosthetic bone and fracture, avoids simultaneously The generation of bone cement disease；

Nearly, after the merging securely of distal end prosthese, connection component 2 is socketed in the convex of prosthese distal stem 3 by access opening 2-9 Portion 3-3 is played, connection component 2 is rotated left and right and I 1-3 of interconnecting piece carries out pairing matching, after adjusting good position, then separately prosthese proximal end 1 interconnecting piece of handle, I 1-3 and connection component 2 are screwed into 1 screw 4 along the access opening 2-9 of connection component 2, and fastening screw 4 will connect group Part 2 is fixed on II 3-2 of basal part for rebuilding part, and II 2-3 of teeth and 3 weight of prosthese distal stem are enclosed in the lower end one of connection component 2 I 3-4 of teeth engagement is enclosed in the upper end one for building the basal part 3-2 of part.

I 1-3 of interconnecting piece is docked with connection component 2 again, distinguishes I concave surface 1-3 of interconnecting piece I 1-3-1 and I 1-3-2 of convex surface Tight fit, I inclined-plane 1-3 of interconnecting piece I 1-3-3 and II 1-3-4 of inclined-plane are contacted with II 2-6 of convex surface and II 2-5 of concave surface of connection component 2 Tight fit is contacted with IV 2-8 of inclined-plane of connection component 2 and III 2-4 of inclined-plane respectively, finally passes through connection component 2 with two screws 4 On two counterbore 2-7 and I 1-3 of interconnecting piece on two I 1-3-5 of threaded hole be spirally connected, I 1-3 of interconnecting piece is consolidated with connection component 2 It is scheduled on together, prosthese is installed successfully.

It in order to improve the initial stability of prosthese, is fixed on the outside of prosthese plus with auxiliary steel plate and screw, steel plate is closely, distally It is individually fixed in that remaining humerus is close, distal end backbone, screw is all made of mono cortex and fixes, and vacation is fixed on a screw in middle section Body proximal end handle 1 is rebuild in II 1-3-6 of threaded hole on I 1-2 of basal part of part, another piece of lower end for being fixed on connection component 2 Threaded hole 2-2 in, at this time steel plate by humerus close, distal end and prosthese it is fixed it is locked be integrated, after steel plate and screw are fixed successfully, Passive activity suffering limb checks that prosthese has situations such as non-loosening, dislocation, the auxiliary Interal fixation success on prosthese.

Steel plate and screw fixtation are combined in biological fixation, are greatlyd improve the initial stability of prosthese, are compensated for biology The bad disadvantage of fixed initial stability.Both fixed form use in conjunction, play complement one another, complementary work With not only overcoming the defect of the prosthese initial stability difference of biological fixation, while avoiding the generation of bone cement disease, keep away simultaneously Exempt from the prosthese of cement reaction, the drawback that crash rate at a specified future date is high.

This prosthese is applicable to long bone of limbs backbone portion because tumour, wound, infection etc. cause structural bone defect to need to carry out The operative treatment that prosthese is rebuild.

It is preoperative to be carried out according to anatomical structures such as the concrete position of patient's lesion bone tissue and sizes by taking humeral shaft tumour as an example The prosthese of individuation measure prostheses, individuation customization can not only improve the accuracy of operation, moreover it is possible to improve the treatment of postoperative prosthese Effect.

It is to be illustrated to the preferable implementation of the utility model, but the utility model creation is not limited to institute above Embodiment is stated, those skilled in the art can also make various be equal without departing from the spirit of the present invention Deformation or replacement, these equivalent deformation or replacement are all contained within the claim of this application limited range.

Claims (2)

1. a kind of artificial prosthesis of the adjustable overlapping connection structure in long bone backbone portion, including prosthese proximal end handle (1), prosthese distal end Handle (3)；It is characterized by also including connection component (2)；

Prosthese proximal end handle (1) is by the shank I (1-1) of integral structure, the basal part I (1-2) and interconnecting piece I of reconstruction part (1-3) is constituted, and the shank I (1-1) is thin cylindrical body, and tail end is hemisphere, and the basal part I (1-2) for rebuilding part is thick circle Cylinder, interconnecting piece I (1-3) are thick semicylinder；

In the plane of the interconnecting piece I (1-3), it is equipped with concave surface I (1-3-1) and convex surface I (1-3-2), concave surface I (1-3-1's) Upper surface is inclined-plane I (1-3-3), and the lower end surface of convex surface I (1-3-2) is inclined-plane II (1-3-4), on concave surface I (1-3-1) and convex surface The threaded hole I (1-3-5) communicated with interconnecting piece I (1-3) semi circular surface is respectively equipped on I (1-3-2), in the base for rebuilding part Bottom I (1-2) is equipped with threaded hole II (1-3-6), threaded hole II (1-3-6) and two (1-3-5) perpendicular separation of threaded hole I rows Column on one wire, are equipped with one layer of coarse gold on the periphery of shank I (1-1) and the basal part I (1-2) for rebuilding part Belong to coating I (1-3-7)；

The prosthese distal stem (3) is made of the basal part II (3-2) of the shank II (3-1) of integral structure and reconstruction part, handle Portion II (3-1) is thin cylindrical body, and tail end is hemisphere, and the basal part II (3-2) for rebuilding part is thick cylindrical body, the reconstruction portion The upper surface (3-2) of basal part II divided is equipped with the lug boss (3-3) of tubulose, and internal screw thread is equipped in the pipe of lug boss (3-3) (3-3-1), along one circle teeth I (3-4) of the upper surface periphery basal part II (3-2) setting for rebuilding part, in shank II (3-1) and One layer of coarse metal coating II (3-5) is equipped on the periphery for the basal part II (3-2) for rebuilding part；

The lower end of the connection component (2) is hollow cylindrical body, and a circle platform (2- is equipped in hollow access opening (2-9) 1) threaded hole (2-2), is equipped with outside hollow rounded body, along one circle teeth of connection component (2) lower end surface periphery setting II (2-3) be inclined-plane III (2-4) above hollow rounded body；

The upper end of connection component (2) is U-shaped semicircular body, and concave surface II (2-5) and II (2- of convex surface are equipped in U-shaped semicircular body plane 6) counterbore (2-7) communicated there are two, being set outside U-shaped semicircular body with (2-5) slot of concave surface II and convex surface II (2-6) slot, two Threaded hole (2-2) perpendicular separation of a counterbore (2-7) and connection component (2) lower end arranges on one wire, above U-shaped semicircular body For inclined-plane IV (2-8)；

The connection component (2) is fixed on prosthese distal stem (3) by screw (4) and rebuilds on the basal part II (3-2) of part, even One circle teeth II (2-3) of connected components (2) lower end and distal stem (3) rebuild a circle tooth of upper end basal part II (3-2) of part Tooth I (3-4) engagement,

The interconnecting piece I (1-3) of prosthese proximal end handle (1) is fixed together with connection component (2) by two screws (4), even The concave surface I (1-3-1) socket part I (1-3) and convex surface I (1-3-2) respectively with the II (2- of convex surface II (2-6) and concave surface of connection component (2) 5) tight fit is contacted,

The inclined-plane I (1-3-3) interconnecting piece I (1-3) and inclined-plane II (1-3-4) correspond respectively to the inclined-plane IV (2-8) of connection component (2) Tight fit is contacted with inclined-plane III (2-4).

2. a kind of artificial prosthesis of the adjustable overlapping connection structure in long bone backbone portion according to claim 1, feature Be: the coarse metal coating I (1-3-7) and coarse metal coating II (3-5) are titanium coating.