CN209316155U - Proximal tibia filling block prosthese - Google Patents

Abstract

The utility model provides a kind of proximal tibia filling block prosthese, the main body including integrally formed solid construction, and main body includes top proximal surface, lower distal end surface and side；Top proximal surface be by its middle part towards the curved rear arc-shaped side of rear, its middle part towards the curved inside arc-shaped side of top proximal interior surface and and its middle part towards the curved outer arcuate side ring of top proximal interior surface around the plane of symmetry constituted；Cambered surface joining place adjacent two-by-two is arc-shaped transition in rear arc-shaped side, inside arc-shaped side and outer arcuate side；Lower distal end surface is circular structure；Side is the multi sphere surface construction that the lower distal end marginal surface is transitted to from top proximal marginal surface；It is equipped with tibia support card slot from top proximal surface towards distal end, is equipped with broach hole from lower distal end surface is proximally facing.The prosthese overall structure is designed according to proximal tibia pulp cavity shape, and Using prosthesis matching degree is high, and stability is good.

Description

Proximal tibia filling block prosthese

Technical field

The utility model belongs to the field of medical instrument technology, in particular to a kind of proximal tibia filling block prosthese.

Background technique

Knee prosthesis is postoperative, and knee joint loosening occurs, infection, pain, bends and stretches the symptoms such as function limitation, prompts kneecap rail Mark just, need to not re-started and be overhauled；Knee joint is taken off, reinstalls a new knee joint.Needed when overhaul technology It determines the reason of overhauling, is to infect or because of prosthetic loosening etc., correctly overhaul mode to determine.Traditional overhaul technology is deposited Have bone defect, the defect of ligament the problems such as, these problems will lead to operating time extension；Simultaneously as operation risk and Complication is higher, it is desirable that the professional surgical technic of doctor is also higher.

Result of study shows that it is knee prosthesis that aseptic loosening, prosthese are unstable, the line of force is not just infected with Periprosthetic The main reason for postoperative revision procedure.It is related as that overhaul the report of main cause different from prostheses such as the polyethylene wears of the past, Periprosthetic infection, prosthese is unstable and the line of force be not just still knee replacements early postoperation and the master that mid-term is overhauled Want reason.In addition, bone defect is also very common problem in knee joint revision procedure；For bone defect, general processing side Method is: bone cement screw is rebuild, prosthese cushion block is rebuild, homogeneous allogenic bone impaction bone grafting or it is structural rebuild, dry dirty end oversleeve and The methods of taper patch, bone defect parting can be divided into two kinds: inclusiveness bone defect and non-packet capacitive bone defect.For inclusiveness Bone defect is generally handled using prosthese cushion block, and advantage is different from homogeneous allogenic bone, and using cushion block, there is no disease biographies The danger broadcast malunion, disunion and allograph bone will not occurs and the complication such as collapse；There is good load conduction energy Power；Reach support and stabilization at once；It carries out additional fixation or cooperation extension rod use and further increases stability；Porous table The metal patch in face can realize the Bone Ingrowth of surrounding；Prosthese can be fixed on the inner surface of patch by cement or other modes.Such as Patent publication No. is a kind of shin bone shaping for using during executing replacement knee in arthroplasty disclosed in CN104042363A Surgical prostheses component comprising the one or more shin bones for being configured to couple to tibia support fill up block, and each shin bone fills up block The outer surface of the angle of top surface of block is filled up relative to shin bone including changing.Tibia support and patch in the technology are not One entirety, structure is complicated, can not play a good supporting role after patch implantation human body.In addition, being based on existing market Upper shin bone patch class prosthese type is less, and is unsatisfactory for doctor's requirement, and the utility model provides solution knee joint and overhauls hand It, can be compared with for the proximal tibia filling block prosthese that the larger bone defect of proximal tibia uses when art or tumour knee replacements Good meets patients ' demand, populated defect.

Utility model content

When in order to solve knee joint revision procedure or tumour knee replacements, the technology of the larger bone defect of proximal tibia is asked Topic, the utility model provide a kind of proximal tibia filling block prosthese, can be preferable when bone defect larger for proximal tibia Meet patients ' demand, populated defect shortens operating time in art, mitigates the financial burden of patient.

The utility model specific technical solution is as follows:

On the one hand the utility model provides proximal tibia filling block prosthese, the master including integrally formed solid construction Body, the main body include top proximal surface, lower distal end surface and side；

The top proximal surface be by its middle part towards the curved rear arc-shaped side of rear, be set to inside edge and wherein Portion is close towards the top towards the curved inside arc-shaped side of the top proximal interior surface and in the middle part of outer ledge and its The plane of symmetry of the curved outer arcuate side ring around composition inside end surfaces；The line of symmetry on the top proximal surface is by described interior The center of side arc-shaped side and outer arcuate side linking center and the rear arc-shaped side；The rear arc-shaped side, inside arc-shaped side It is arc-shaped transition with cambered surface joining place adjacent two-by-two in outer arcuate side；

The lower distal end surface is circular structure；

The side is the multi-cambered surface structure that the lower distal end marginal surface is transitted to from the top proximal marginal surface It makes；

It is equipped with tibia support card slot from the top proximal surface towards distal end, is set from the lower distal end surface is proximally facing There is broach hole.

Proximal tibia filling block prosthese described in the utility model 3D printing preparation carried out using titanium alloy or tantalum material and At；Or the prosthese carries out machining using titanium alloy and is prepared.

A kind of proximal tibia filling block prosthese provided by the utility model is used according to human tibia anatomical structure, upper end The clover shape that rear arc-shaped side, inside arc-shaped side and outer arcuate side are formed, gradually transition is circle for lower end, and prosthese is whole Structure is designed according to proximal tibia pulp cavity shape, guarantees that Using prosthesis has preferable matching degree.

The utility model prosthese is integrally formed construction, guarantees that prosthese forms an entirety, uniform stressed, to make prosthese Fixation is more firm.There is the tibia support card slot for assembling and using in the utility model prosthese upper end, and threaded hole, side are equipped on upper surface Just tibia support is connect with product, so that prosthese is integrally solid and reliable, is not easy to loosen；There is the broach for assembling and using with broach in lower end Hole increases prosthese stability.

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly introduced, it should be apparent that, the accompanying drawings in the following description is only some implementations of the utility model Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings Obtain other attached drawings.

Fig. 1 is a kind of structure chart of embodiment of the utility model proximal tibia filling block prosthese；

Fig. 2 is stereochemical structure Fig. 1 of the another embodiment of the utility model proximal tibia filling block prosthese；

Fig. 3 is stereochemical structure Fig. 2 of the another embodiment of the utility model proximal tibia filling block prosthese；

Fig. 4 is the top view of the another embodiment of the utility model proximal tibia filling block prosthese；

Fig. 5 is the side view of the another embodiment of the utility model proximal tibia filling block prosthese；

Fig. 6 is the bottom view of the another embodiment of the utility model proximal tibia filling block prosthese.

Specific embodiment

With reference to the accompanying drawings and examples, to the specific embodiment of the utility model proximal tibia filling block prosthese make into The description of one step.Following embodiment is only used for clearly illustrating the technical solution of the utility model, and cannot be used as a limitation limitation The protection scope of the utility model；Those of ordinary skill in related technical field, in the spirit and model for not departing from the utility model It in the case where enclosing, can also make a variety of changes and modification, therefore all equivalent technical solutions also belong to the utility model The scope of patent protection of scope, the utility model should be limited by each claim.

The natural anatomical structure two of orthopedic implants as described herein and patient is referred in the description of the present invention, The term for indicating anatomical reference, such as leading edge, rear, inside, outside, left side, right side, upper and lower etc. can be used in person.It is such Term has well known meaning in both anatomical research and field of orthopedic surgery.Unless otherwise specified, specification and right Such anatomical reference term used in it is required that is intended to meet its well known meaning.

Embodiment

Fig. 1 shows a kind of proximal tibia filling block prosthese of the utility model, in this exemplary embodiment, including one The main body 1 of molding solid construction, the main body 1 include top proximal surface 10, lower distal end surface 20 and side 30；

The top proximal surface 10 is by its middle part towards the curved rear arc-shaped side 101 of rear, set on inside edge And its middle part towards the curved inside arc-shaped side 102 in 10 inside of top proximal surface and is set to outer ledge and its middle part Towards the 10 curved outer arcuate side 103 in inside of top proximal surface around the plane of symmetry constituted；The top proximal surface 10 line of symmetry is connected center and the rear arc-shaped side 101 by the inside arc-shaped side 102 and outer arcuate side 103 Center；Cambered surface joining place adjacent two-by-two is in the rear arc-shaped side 101, inside arc-shaped side 102 and outer arcuate side 103 Arc-shaped transition；

The lower distal end surface 20 is circular structure；

The side 30 is more from 10 edge transition of top proximal surface to 20 edge of lower distal end surface Cambered surface structure；

It is equipped with tibia support card slot 11 from the top proximal surface 10 towards distal end, from 20 direction of lower distal end surface Proximal end is equipped with broach hole 22.

It should be noted that " inside " " middle part " described above is the position set corresponding to specific structure, Er Feiben The directional terminology in forward and backward, inside, outside, left side, right side in anatomy of the utility model described in other.As " its middle part is after The curved rear arc-shaped side 101 " of edge refers to the middle part sideline camber line of rear arc-shaped side 101 towards rear described in anatomy Position bending.

In above structure, using the clover form on top proximal surface (i.e. towards the curved rear arc of rear in the middle part of it Shape side 101, its middle part are towards the curved inside arc-shaped side 102 in 10 inside of the top proximal surface and its middle part towards the top The 10 curved outer arcuate side 103 in inside of proximal end face is around composition) circular lower distal end surface is transitted to, form solid three The tibial prosthesis of leaf grass construction, the overall structure meet human tibia anatomical structure, and the fitness and stability of Using prosthesis are high. The existing prosthese that tibia support card slot can be designed with applicant flexibly assembles, and group mode is interference fit, and prosthese assembling securely may be used It leans on, is not easy to loosen；Broach hole also further increases prosthese stability, and prosthese is facilitated to be satisfactorily implanted.

In some instances, see Fig. 2-6, the rear arc-shaped side 101 on top proximal surface 10 described in the utility model, inside Arc-shaped side 102 and outer arcuate side 103 are circular arc.Specifically, the arc radius of the rear arc-shaped side 101 is 58mm- 62mm, arc length 0.9-1.1cm；The inside arc-shaped side 102 and the arc radius on outer arcuate side 103 are 28mm-32mm, Arc length is 0.9-1.1cm.The angle that the tangent line of the inside arc-shaped side 102 intersects with the tangent line on the outer arcuate side 103 is 42°-48°.The structure that top proximal configuration of surface under the qualifications transits to lower distal end surface composition more meets people Body Tibia Anatomy construction；And in some preferable examples, the arc most bump at the middle part of rear arc-shaped side 101 to lower distal end surface The line at the 20 most round point of contacts of rear side is vertical relation, such as Fig. 6 in the top proximal surface 10 or lower distal end surface 20 It is shown.

Rear arc-shaped side 101, inside arc in the other example of the utility model prosthese, along the top proximal surface 10 Shape at 102 and outer arcuate 103 in arc joining place two-by-two transit in the path at 20 edge of lower distal end surface Side 30 in the middle part of be anti-choma outstanding.See Fig. 3, the joining place along rear arc-shaped side 101 and inside arc-shaped side 102 transits to In the path at 20 edge of lower distal end surface, anti-choma 31 is set as in the middle part of side 30；Along rear arc-shaped side 101 and outer arcuate The joining place on side 103 transits in the path at 20 edge of lower distal end surface, and anti-choma 33 is set as in the middle part of side 30；Along lateral arcs The joining place of shape side 103 and inside arc-shaped side 102 transits in the path at 20 edge of lower distal end surface, is set as in the middle part of side 30 Anti- choma 32；Include the anti-choma of Zhe tri- among prosthese, guarantees that Using prosthesis primary stability is good, anti-rotation ability is good.

In the still other example of the utility model prosthese, shown in Fig. 2, Fig. 4, the tibia support card slot 11 is included at least and is set to The central channel 100 at 10 middle part of the top proximal surface extends from the central channel 100 towards the rear arc-shaped side 101 Rear card slot 111, the interior side bayonet slot 112 towards the inside arc-shaped side 102 with the extension of 101 joining place of rear arc-shaped side and court The outer side bayonet slot 113 extended to the outer arcuate side 103 with 101 joining place of rear arc-shaped side.

The tibia support card slot 11 further includes from the central channel 100 towards the outer arcuate side 103 and inside arc The leading edge card slot 114 that 102 joining place of side extends.It is up-front that the central channel 100 is located at 10 centre symmetry line of top proximal surface Position, 11 depth of tibia support card slot are 8-10mm.

Above structure is it is found that the utility model tibia support card slot 11 is located at the middle of prosthese upper surface, similar to cross Shape can flexibly be assembled with the existing prosthese of applicant, and group mode is interference fit, so that prosthese is solid and reliable, be not easy pine It is de-.In addition, the position that the tibia support card slot 11 is engaged with top proximal surface 10 is circular arc chamfering transition.

To cooperate human tibia distal structure, the radius on the lower distal end surface 20 is 30-40mm.In some examples, The broach hole 22 is the threaded hole of M8, M9, M10, M11 or M12, and the position in the broach hole 22 is eccentric or non-eccentricity Design, wherein eccentricity when 22 position of broach hole is bias is 2-6mm.When using broach, it is steady prosthese can be increased It is qualitative, it for the case of some complexity, such as shin bone deformity case, can be stabilized using long broach, and reduce shin bone The stress shielding of proximal end guarantees that prosthese can be steady in a long-term；Short broach can play guiding role, and prosthese is facilitated to be satisfactorily implanted.

In some instances, 2mm -4mm is distributed on the side 30 in the utility model proximal tibia filling block prosthese Trabecular bone structure (not shown)；Since prosthese and bone interface are biological fixation, suitable network (bone trabecula knot Structure) and porosity be conducive to Bone Ingrowth, increase prosthese stability, will not loosen.

In other example, there are also 2-5 on prosthese end face (the i.e. described top proximal surface 10) described in the utility model M4 threaded hole (not shown), is fixed on prosthese convenient for tibia support, depth 3-5mm.

The preparation process of the utility model proximal tibia filling block prosthese are as follows: the prosthese using titanium alloy or tantalum material into Row 3D printing is prepared；Or the prosthese carries out machining using titanium alloy and is prepared.Wherein, after prosthese molding also Titanium spraying, titanium sintering and hydroxyapatite surface coating treatment is carried out to protect to guarantee that prosthese and bone have a good interface Demonstrate,prove Bone Ingrowth.

It is had an advantage that using the proximal tibia filling block prosthese of above-mentioned design compared to existing proximal tibia prosthese

1, in the prior art, prosthese patch is mostly hollow structure, and general tibia support is connect with broach, and patch is from intermediate sleeve Into due to being hollow structure, the gap among tibia support broach structure that patch and group prepare is larger, and bone cement is needed to be filled out It fills, bone cement can cause prosthetic loosening, lead to operative failure, it may be necessary to overhaul again, and Cement once failing It may cause natural bone derived materials, increase operation risk.And the utility model product is solid construction, is overcome well above-mentioned Problem improves success rate of operation.

2, the prior art is mostly cement reaction, in stress distribution, since there are cement, institutes between tibia support and patch Cannot regard an overall structure as, a good supporting role can not be played after patch implantation human body, and this is practical new Tibia support and patch prosthese and broach connection type are mechanical connection manner in type prosthese, guarantee that prosthese forms an entirety, Uniform stressed, to keep prosthese fixation more firm.

3, prior art processing method is mostly metal foaming technique, but the utility model prosthese using 3D printing technique or Process for machining carries out, and 3D printing artistic face uses trabecular bone structure, this structure is conducive to Bone Ingrowth；Using machining mode Titanium sintering, titanium spraying and the surface treatments such as hydroxyapatite sprayed can be used in the prosthetic surface of production, are conducive to Bone Ingrowth.

4, the prosthese of the prior art is mostly hollow structure, and the eccentric structure in broach hole can not be realized on prosthese, is needed An eccentric ratio is connected on tibia support is just able to achieve the structure, and the utility model technology only needs to select eccentric type shin bone false Body can flexibly assemble use, and eccentric structure is not suitable for most of normal patients, and it is abnormal that eccentric configuration is suitable for a small number of bones Shape patient.

5, existing prosthese not anti-choma structure design, the utility model prosthese main body are cloverleaf pattern, lower end gradually mistake It crosses as circle, before prosthese and there is anti-choma in side, this designs the anti-rotation performance that can greatly improve prosthese, guarantees prosthese It will not loosen, guarantee the initial stability of prosthese.

In the description of this specification, reference term " embodiment " " some embodiments " " schematic embodiment party The description of formula " " example " specific examples or " some examples " etc. means the specific spy described in conjunction with the embodiment or example Sign, structure, material or feature are contained at least one embodiment or example of the utility model.In the present specification, right The schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.

Although it is shown that or describe preferred embodiments of the present invention, it is noted that this technology is led For the those of ordinary skill in domain, without deviating from the technical principle of the utility model, can also make it is several improvement and Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.

Claims (10)

1. a kind of proximal tibia filling block prosthese, which is characterized in that the main body (1) including integrally formed solid construction, it is described Main body (1) includes top proximal surface (10), lower distal end surface (20) and side (30)；

The top proximal surface (10) is by its middle part towards the curved rear arc-shaped side (101) of rear, set on inside edge And its middle part is towards the internal curved inside arc-shaped side (102) of the top proximal surface (10) and set on outer ledge and wherein Portion is towards the internal curved outer arcuate side (103) of the top proximal surface (10) around the plane of symmetry constituted；The top is close The line of symmetry of end surfaces (10) is by the inside arc-shaped side (102) and outer arcuate side (103) linking center and the rear The center of arc-shaped side (101)；In the rear arc-shaped side (101), inside arc-shaped side (102) and outer arcuate side (103) two-by-two Adjacent cambered surface joining place is arc-shaped transition；

The lower distal end surface (20) is circular structure；

The side (30) is from top proximal surface (10) edge transition to lower distal end surface (20) edge Multi sphere surface construction；

Tibia support card slot (11) are equipped with from the top proximal surface (10) towards distal end, from lower distal end surface (20) court Proximally it is equipped with broach hole (22).

2. proximal tibia filling block prosthese as described in claim 1, which is characterized in that the rear arc-shaped side (101), inside Arc-shaped side (102) and outer arcuate side (103) are circular arc；

The arc radius of the rear arc-shaped side (101) is 58mm-62mm, arc length 0.9-1.1cm；

The arc radius of the inside arc-shaped side (102) and outer arcuate side (103) is 28mm-32mm, arc length 0.9- 1.1cm。

3. such as proximal tibia filling block prosthese of any of claims 1-2, which is characterized in that the inside arc-shaped side (102) angle that tangent line intersects with the tangent line of the outer arcuate side (103) is 42 ° -48 °.

4. proximal tibia filling block prosthese as described in claim 1, which is characterized in that along the top proximal surface (10) Arc joining place in rear arc-shaped side (101), inside arc-shaped side (102) and outer arcuate side (103) two-by-two transits to described It is anti-choma (31,32,33) outstanding in the middle part of side (30) in the path at lower distal end surface (20) edge.

5. proximal tibia filling block prosthese as described in claim 1, which is characterized in that the tibia support card slot (11) is at least wrapped Include the central channel (100) being set in the middle part of the top proximal surface (10), from the central channel (100) towards the rear arc The rear card slot (111) of side (101) extension extends towards the inside arc-shaped side (102) and rear arc-shaped side (101) joining place Interior side bayonet slot (112) and the outside card that extends towards the outer arcuate side (103) and rear arc-shaped side (101) joining place Slot (113).

6. proximal tibia filling block prosthese as claimed in claim 5, which is characterized in that the tibia support card slot (11) further includes The leading edge card slot extended from the central channel (100) towards the outer arcuate side (103) and inside arc-shaped side (102) joining place (114)。

7. proximal tibia filling block prosthese as claimed in claim 5, which is characterized in that the central channel (100) is located at top The up-front position 1/4-1/2 of proximal end face (10) centre symmetry line, tibia support card slot (11) depth are 8mm-10mm.

8. proximal tibia filling block prosthese as described in claim 1, which is characterized in that the half of the lower distal end surface (20) Diameter is 30mm-40mm；The trabecular bone structure of 2mm-4mm is distributed on the side (30).

9. proximal tibia filling block prosthese as described in claim 1, which is characterized in that the broach hole (22) be M8, M9, The threaded hole of M10, M11 or M12, the position of the broach hole (22) are the eccentric or center of circle, wherein the broach hole (22) Eccentricity when position is bias is 2mm-6mm；

The prosthese proximal face is equipped with 2-5 M4 threaded hole, depth 3-5mm.

10. proximal tibia filling block prosthese as described in claim 1, which is characterized in that the prosthese uses titanium alloy or tantalum Material carries out 3D printing and is prepared；Or the prosthese carries out machining using titanium alloy and is prepared；

Wherein, titanium spraying, titanium sintering and hydroxyapatite surface coating treatment are also carried out after the prosthese molding.