CN209661886U - Toe joint prosthese - Google Patents

Abstract

The utility model relates to medical prosthesis technical fields, disclose a kind of toe joint prosthese.The toe joint prosthese includes: the first broach prosthese and the second broach prosthese hinged with the first broach prosthese, first broach prosthese includes the first broach for being arranged in ossis and is connected with the first broach and is located at the second broach outside ossis, and the second broach and the second broach prosthese are hinged.Wherein, the outer surface of the first broach and/or the second broach and/or the second broach prosthese is formed with three-dimensional porous structure sheaf.Ability that the outer surface of the toe joint prosthese of the utility model can obtain better Bone Ingrowth ability and bone is creeped, so that the fixation of the toe joint prosthese is more stable.

Description

Toe joint prosthese

Technical field

The utility model relates to medical prosthesis technical field more particularly to a kind of toe joint prostheses.

Background technique

Toe joint prosthese is to be used to plant instead of the surgery at human body sufferer toe joint position applied in toe joint displacement technique Enter object.When the toe joint of human body needs to repair because of situations such as meeting with tumour or comminuted fracture, tend to that toe is caused to close The severe bone of section, serious bone defect not only make the bearing capacity of the position power of the osteotomy of toe joint be deteriorated, are also easy to lead The problems such as causing the attachment point defect of the muscle at toe joint or joint capsule to damage needs that suitable toe joint prosthese is selected at this time Replace the toe joint of sufferer.

Existing toe joint prosthese is mainly made of the first broach prosthese and second broach prosthese two parts, and the first broach is false Hingedly to realize the movable function of toe joint prosthese between body and the second broach prosthese.However, existing one side of toe joint prosthese Its first broach prosthese of face and the second broach prosthese cannot the osteotomy section effectively respectively with affected part fix；It on the other hand can not The attachment point and joint capsule for more effectively rebuilding the muscle near toe joint prosthese, after this just not can guarantee toe joint Using prosthesis Stability, to be unfavorable for the postoperative rehabilitation of patient, or even be easy to cause the secondary injury to patient.

In view of the deficiencies of the prior art, those skilled in the art is badly in need of seeking more stable toe joint after a kind of implantation Prosthese, to make up the deficiencies in the prior art.

Utility model content

In order to keep the toe joint prosthese after implantation more stable, the utility model proposes a kind of toe joint prostheses.

Toe joint prosthese according to the present utility model, comprising: the first broach prosthese and hinged with the first broach prosthese the Two broach prostheses, the first broach prosthese include the first broach for being arranged in ossis and are connected and are located at the first broach The second broach outside ossis, the second broach and the second broach prosthese are hinged, wherein the first broach and/or the second broach and/ Or second the outer surface of broach prosthese be formed with three-dimensional porous structure sheaf.

Further, toe joint prosthese is toe joint prosthese, wherein the first broach prosthese is used to be connected with metatarsal, second Broach prosthese with phalanx for being connected, and the first broach is located inside the pulp cavity of metatarsal, and the second broach is located at outside the pulp cavity of metatarsal And it is abutted with the end face of metatarsal.

Further, toe joint prosthese is palm toe joint prosthese, wherein the first broach prosthese is used to be connected with metacarpal bone, second Broach prosthese with phalanges for being connected, and the first broach is located inside the pulp cavity of metacarpal bone, and the second broach is located at outside the pulp cavity of metacarpal bone And it is abutted with the end face of metacarpal bone.

Further, three-dimensional porous structure sheaf include a plurality of string diameter and be crossed-over by a plurality of string diameter formed it is multiple Hole, each hole are interconnected, and the equivalent diameter of each hole is different, wherein the equivalent diameter range of each hole be 100 μm extremely 400 μm, and the range of the porosity of three-dimensional porous structure sheaf is 50% to 80%.

Further, the equivalent diameter for being formed in each hole in the three-dimensional porous structure sheaf of the outer surface of the first broach is big The equivalent diameter of each hole in the three-dimensional porous structure sheaf for the outer surface for being formed in the second broach.

Further, the first broach prosthese further includes the articulated joint being fixedly connected with the second broach, the direction of articulated joint the One end of two broach prostheses is configured to spherical, and the second broach prosthese includes spherical recess, spherical recess towards articulated joint Edge face structure is the concave ball surfaces cooperated with spherical.

Further, the second broach prosthese further includes the needle-like portion being connected with spherical recess, and spherical recess further includes connection Outwardly projecting curved surfaces between concave ball surfaces and the periphery wall of needle-like portion, three-dimensional porous structure sheaf are formed in arc table On face.

Further, the curved surfaces of spherical recess include first surface for extending into pulp cavity and are located at pulp cavity Outer second surface, wherein the equivalent diameter for forming each hole of three-dimensional porous structure sheaf on the first surface, which is greater than, to be formed The equivalent diameter of each hole in three-dimensional porous structure sheaf on a second surface.

Further, the range for forming the equivalent diameter of each hole of three-dimensional porous structure sheaf on the first surface is 100 μm to 200 μm, the range for forming the equivalent diameter of each hole in three-dimensional porous structure sheaf on a second surface is 200 μ M to 400 μm.

Further, it is also formed on the side wall of the second broach through the first suture hole of the second broach, articulated joint is leaned on The second suture hole of articulated joint is formed through on one end of nearly second broach.

Further, the outer surface of needle-like portion is configured to rough surface.

Further, the first broach, the second broach and porous three dimensional structure layer are integrally formed, and/or, the second broach is false Body and porous three dimensional structure layer are integrally formed.

Compared with prior art, the toe joint prosthese of the utility model has the advantage of following several respects:

1) by being formed with three-dimensional porous structure sheaf in the outer surface of the first broach prosthese and/or the second broach prosthese, make The outer surface of the first broach prosthese and/or the second broach prosthese obtains better Bone Ingrowth ability and bone is creeped ability, from And make the fixation of toe joint prosthese more stable.

2) weight of toe joint prosthese can also be effectively reduced in the setting of three-dimensional porous structure sheaf, and helps to rebuild soft group The attachment point with muscle is knitted, so as to which patient's postoperative recovery time is effectively reduced, and it is postoperative to significantly improve patient Recovery effects.

3) pass through the first broach prosthese of the toe joint prosthese to the utility model and the second broach being customized of prosthese Production, can not only more adapt to the internal diameter and bending curvature of the pulp cavity of patient, to further strengthen the stabilization of toe joint prosthese Property, additionally it is possible to it helps to restore the length of toe joint, the length of the affected part toe joint and healthy toe joint that ensure that patient is protected It holds consistent.

4) setting in the first suture hole and the second suture hole additionally aids reparation or rebuilds damaged joint capsule, to be conducive to The post-operative recovery of patient, and keep good stability of joint.

Detailed description of the invention

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar Element or part are generally identified by similar appended drawing reference.In attached drawing, each element or part might not be according to actual ratios It draws.

Fig. 1 is the structural schematic diagram according to the toe joint prosthese of the utility model；

Fig. 2 is the connection schematic diagram of toe joint prosthese and metatarsal and phalanx shown in FIG. 1；

Fig. 3 is the structural schematic diagram of the first broach prosthese shown in FIG. 1；

Fig. 4 is the structural schematic diagram of articulated joint shown in Fig. 3；

Fig. 5 is the structural schematic diagram of the second broach prosthese shown in FIG. 1.

Specific embodiment

It is described in detail below in conjunction with embodiment of the attached drawing to technical solutions of the utility model.Following embodiment is only For clearly illustrating the technical solution of the utility model, therefore it is only used as example, and it is originally practical to cannot be used as a limitation limitation Novel protection scope.

Fig. 1 shows the structure of toe joint prosthese 100 according to the present utility model.As shown in Figure 1, the toe joint prosthese packet Include: the first broach prosthese 1 and the second broach prosthese 2 with the first broach prosthese 1 hingedly, the first broach prosthese 1 includes for setting It sets the first broach 11 in ossis and is connected with the first broach 11 and is located at the second broach 12 outside ossis, the second marrow Needle 12 and the second broach prosthese 2 are hinged.Wherein, the first broach 11 and/or the second broach 12 and/or the second broach prosthese 2 is outer Surface is formed with three-dimensional porous structure sheaf 5.It is worth noting that, the toe joint prosthese 100 of the utility model can close for toe Save prosthese or metacarpophalangeal joints prosthese.Below by by taking toe joint prosthese as an example to the knot of the toe joint prosthese 100 of the utility model Structure and application method are specifically described.

Referring to figs. 1 and 2, which is toe joint prosthese, and the first broach prosthese 1 is used for and plantar Bone 3 is connected, and the second broach prosthese 2 with phalanx 4 for being connected, and the first broach 11 is located inside the pulp cavity of metatarsal 3, the second broach 12 It is abutted outside the pulp cavity of metatarsal 3 and with the end face of metatarsal 4.

It should be noted that the first broach prosthese 1 is used for and metacarpal bone when toe joint prosthese 100 is palm toe joint prosthese It is connected, the second broach prosthese 2 with phalanges for being connected, and the first broach 11 is located inside the pulp cavity of metacarpal bone, and the second broach 12 is located at It is abutted outside the pulp cavity of metacarpal bone and with the end face of metacarpal bone.

Fig. 2 is returned to, the toe joint prosthese of the utility model is needed when being applied to the displacement of toe joint to patient's Do osteotomy processing at metatarsal 3 and phalanx 4, there are a large amount of bone defects for osteotomy treated metatarsal 3 and phalanx 4.The utility model By the way that the first broach prosthese 1 to be arranged to include 12 two parts of the first broach 11 and the second broach, so that the first broach 11 can prolong It extends into so as to its subsequent rapid fusion with the bone tissue in pulp cavity 31 in the pulp cavity 31 of metatarsal 3, and is located at outside metatarsal 3 Second broach 12 can effectively make up the bone defect of metatarsal 3, i.e., the bone of 3 defect of metatarsal is made up by the length of the second broach 12 Length.The end face of the second broach 12 and metatarsal 3 abuts against simultaneously, can effectively ensure what the first broach prosthese 1 was fixed with metatarsal 3 Stability；By the way that one end of the second broach prosthese 2 is connected with phalanx 4, the other end and the first broach prosthese 1 are hinged, realize Sliding of the phalanx 4 relative to metatarsal 3 is also achieved while the connection of second broach prosthese 2 and metatarsal 3, to realize toe joint 100 movable function.

And by being formed with solid in the outer surface of the first broach 11 and/or the second broach 12 and/or the second broach prosthese 2 Porous structure layer 5, so that the outer surface of the first broach prosthese 1 and/or the second broach prosthese 2 is formed as porous structure, in this way, the One broach 11 is provided with the contact area bigger with the inner wall of pulp cavity 31, i.e. the outer surface of the first broach 11 obtains better bone Ability is grown into, the bone tissue in pulp cavity 31 can quickly be grown into porous structure, to facilitate toe joint prosthese 100 in metatarsal 3 Interior stable fixation；In the porous structure that the outer surface of the second broach 12 is formed the outer surface of the second broach 12 is obtained more Good bone is creeped ability, and the bone tissue in pulp cavity 31 can quickly be grown into its porous structure along the outer surface of the second broach 12, from And make the fixation of the first broach prosthese 1 and metatarsal 3 more stable；And it is formed in the outer surface of the second broach prosthese 2 porous Structure, again such that the second broach prosthese 2 is provided with bigger contact area with phalanx 4, the bone tissue in pulp cavity 41 can be quick It grows into porous structure, so that the outer surface of the second broach prosthese 2 is made to obtain the ability that better Bone Ingrowth and bone are creeped, into And make the fixation of the second broach prosthese 2 and phalanx 4 more stable.

In addition, the weight of toe joint prosthese 100 can be effectively reduced in the setting of three-dimensional porous structure sheaf 5, and also help In the attachment point for rebuilding soft tissue and muscle, so as to which patient's postoperative recovery time is effectively reduced, and significantly improve The postoperative recovery effects of patient.

In addition, producing by being customized metaplasia to the first broach prosthese 1 and the second broach prosthese 2, the first broach can be made false Body 1 and the second broach prosthese 2 more adapt to the internal diameter and bending curvature of the metatarsal 3 of patient and the pulp cavity of phalanx 4, to further add The strong stability cooperated between first broach prosthese 1 and metatarsal 3 and between the second broach prosthese 2 and phalanx 4, Er Qieding The the first broach prosthese 1 and the second broach prosthese 2 of inhibition and generation production additionally aid the length for restoring toe joint, ensure that trouble The affected part toe joint of person and the length of healthy toe joint are consistent.

According to the utility model, three-dimensional porous structure sheaf 5 may include a plurality of string diameter and is crossed-over by a plurality of string diameter The multiple holes formed, each hole are interconnected, and the average diameter of each hole is different, wherein the equivalent diameter model of each hole Enclosing is 100 μm to 400 μm, and the range of the porosity of three-dimensional porous structure sheaf 5 is 50% to 80%.By will be mutual by string diameter Each hole being cross-linked to form is interconnected, and the big little structure of the equivalent diameter of each hole is inconsistent, and to three-dimensional porous The equivalent diameter of the hole of structure sheaf 5 and the range of porosity are specifically arranged so that the structure of three-dimensional porous structure sheaf 5 with The trabecular bone structure of human body is more closely, the three-dimensional porous structure sheaf 5 of porosity with higher and connectivity can be good at Bone Ingrowth is induced, the sclerotin of such human body can be grown into rapid and natural in the hole of three-dimensional porous structure sheaf 5, to improve into The ability of adherency, the increment, differentiation of osteocyte effectively promotes growing into and creeping for metatarsal 3 and the bone tissue in phalanx 4, And then be conducive to toe joint prosthese 100 after surgery with the bone tissue rapid fusion of human body and fixation, therefore effectively improve trouble The postoperative recovery effects of person.

It should be noted that the section of each hole formed by string diameter is not regular circle, cross sectional shape be can be Various shape, in consideration of it, " equivalent diameter " of each hole mentioned herein should be understood as that the section by each hole is equivalent to justify When shape, the circular diameter.It since the section is equivalent to circular diameter is calculated according to the real area in section, The numerical value of resulting diameter is accurate numerical value.

Preferably, it is gradually increased from the density of the hole on the outside to the direction of inside of three-dimensional porous structure layer 5, thus During making human body Bone Ingrowth, it is more that bone tissue more successfully quickly can grow into solid by the outside of three-dimensional porous structure sheaf 5 The inside of pore structure layer 5, with promoted three-dimensional porous structure sheaf 5 and body bone tissue merge and fixed effect.

It is further preferred that can be formed with multiple protrusion (not shown)s on the periphery wall of each string diameter, multiple protrusion is set The roughness of the periphery wall for increasing string diameter is set, to increase the frictional force of its periphery wall, in this way, during Bone Ingrowth, The fixation of bone tissue and string diameter is more secured and stablizes.Preferably, which can be circular salient point, be also possible to cone cell Salient point.It is worth noting that, the shape of the protrusion is not limited only to above-mentioned shape, as long as the protrusion can effectively increase The external surface area of string diameter with realize increase its periphery wall frictional force purpose, which is not described herein again.Further, this is convex The width range of the largest contours shape of the cross section in portion is 5-50 μm, and maximum height range is 10-50 μm.

It is further preferred that protrusion can be uniformly distributed along the outer surface of string diameter, can also be distributed with discrete type.It is further preferred that vertical The number of protrusion in the string diameter in the biggish region of the porosity of body porous structure layer 5 can be greater than the hole of three-dimensional porous structure sheaf 5 The number of protrusion in the string diameter in the lesser region of gap rate, so that Bone Ingrowth is more secured.It is further preferred that from three-dimensional porous structure The density of the protrusion in string diameter on the outer edge of layer 5 is greater than from the protrusion in the string diameter of the inside of three-dimensional porous structure layer 5 Density.

In one preferred embodiment, the outer surface of the first broach 11 and the second broach 12 is each formed with three-dimensional porous Structure sheaf 5.Preferably, the thickness for being formed in the three-dimensional porous structure sheaf 5 of the outer surface of the first broach 11 and the second broach 12 can With identical.Preferably, the thickness range of three-dimensional porous structure sheaf 5 is 1mm to 2mm, more preferably 1.5mm.By the setting, one Aspect makes the first broach prosthese 1 have the outer surface that more conducively Bone Ingrowth and bone are creeped, and on the other hand also makes the first broach Prosthese 1 has the ability of preferably carrying, conduction and dispersive stress load, so that it is more stable to obtain toe joint prosthese 100 Using effect.

Certainly, the thickness for being formed in the three-dimensional porous structure sheaf 5 of the outer surface of the first broach 11 and the second broach 12 can also With difference, the difference for the patient being applicable according to the first broach prosthese 1 can specifically design it, such as when patient bone is long Enter ability it is poor when, can be by the three-dimensional porous structure of the outer surface of the first broach 11 in order to guarantee the intensity of the first broach prosthese 1 The thickness of the three-dimensional porous structure sheaf 5 of the outer surface compared to the second broach 12 of the thickness setting of layer 5 is thicker.And work as patient certainly The bone of body creep ability it is poor when, in order to guarantee the first broach prosthese 1 fixation stability, can be by the appearance of the second broach 12 The thickness of the three-dimensional porous structure sheaf 5 of the outer surface compared to the first broach 11 of the thickness setting of the three-dimensional porous structure sheaf 5 in face It spends thicker.

Preferably, it is formed in the average diameter of each hole in the three-dimensional porous structure sheaf 5 of the outer surface of the first broach 11 The equivalent diameter of each hole in the three-dimensional porous structure sheaf 5 for the outer surface for being formed in the second broach 12 can be greater than.Further, The equivalent diameter for each hole being formed in the porous three dimensional structure layer 5 of the outer surface of the first broach 11 ranges preferably from 200 μ M to 400 μm, the controlled porosity in the region is between 50% to 60% at this time, and further preferably 300 μm to 400 μm, hole Gap rate is can be controlled between 50% to 55%；It is formed in each hole in the porous three dimensional structure layer 5 of the outer surface of the second broach 12 The equivalent diameter of gap ranges preferably from 100 μm to 200 μm, and controlled porosity is between 70% to 80% at this time, further Preferably 100 μm to 150 μm, controlled porosity is between 75% to 80%.

By above-mentioned setting, it is formed in the equivalent straight of the hole of the porous three dimensional structure layer 5 of the outer surface of the first broach 11 Diameter can preferably promote Bone Ingrowth at 200 μm to 400 μm, so that the initial stage for keeping toe joint prosthese 100 displaced obtains More stable fixed effect；And it is formed in the equivalent diameter of the hole of the porous three dimensional structure layer 5 of the outer surface of the second broach 12 Range when being 100 μm to 200 μm, bone is creeped the fastest of growth, so as to accelerate in the displacement of toe joint prosthese 100 The growth of the bone tissue of phase and later period, and then promote the faster rehabilitation of patient.

As shown in figure 3, the second broach 12 can be formed with the junction of the first broach 11 for abutting with the end face of metatarsal 3 Platform 13, which realizes the second broach 12 more preferably for carry the active force from metatarsal 3 in a manner of platform Mechanics bearing function, to help to improve the whole mechanics bearing capacity of the first broach prosthese 1.Preferably, the second marrow It is circular column that needle 12, which may be configured to cross section, to keep toe joint prosthese 100 more stable when in use, to the branch of metatarsal 3 It is more stable to support effect.

In another preferred embodiment, the appearance of the first broach 11, the second broach 12 and the second broach prosthese 2 Face has been respectively formed on three-dimensional porous structure sheaf 5, is formed in the thickness of the three-dimensional porous structure sheaf 5 of the outer surface of the second broach prosthese 2 Degree can be identical as the above-mentioned thickness of three-dimensional porous structure sheaf 5 of outer surface of the first broach 11 and the second broach 12, can also The difference of difference, the patient which can be applicable according to the second broach prosthese 2 can be designed specifically, hereafter can The part-structure is specifically described.

According to the utility model, as shown in figure 3, the first broach prosthese 1 may also include and be fixedly connected with the second broach 12 One end of articulated joint 14, the second broach prosthese 2 of direction of articulated joint 14 is configured to spherical 141；As shown in figure 5, the second broach Prosthese 2 includes spherical recess 21, and the edge face structure towards articulated joint 14 of spherical recess 21 has the spill cooperated with spherical 141 Spherical surface 211.By the cooperation of the concave ball surfaces 211 of the spherical 141 and the second broach prosthese 2 of articulated joint 14, make articulated joint 14 Form the hinged connection type of spherical surface with the second broach prosthese 2, the connection type can not only make the second broach prosthese 2 relative to The center line of articulated joint 14 is swung, additionally it is possible to rotate the second broach prosthese 2 relative to articulated joint 14, to improve metatarsal 3 and toe The flexibility of the opposite movement of bone 4.Preferably, the second broach 12 can be screw thread company with the mode that is fixedly connected of articulated joint 14 It connects, so as to the fixing-stable of the second broach 12 and articulated joint 14 and be easily installed or dismantle.For example, as shown in Figure 3 and Figure 4, the The end face of two broach 12 contacted with articulated joint 14 may be provided with stud 121, the end of articulated joint 14 contacted with the second broach 12 Face can be formed with the threaded hole 142 being threadedly coupled with stud 121.

According to the utility model, it is used for as shown in figure 5, the second broach prosthese 2 may also include with what spherical recess 21 was connected The needle-like portion 22 being implanted into the pulp cavity 41 of phalanx 4, spherical recess 21 further includes being connected to the periphery of concave ball surfaces Yu needle-like portion 22 Outwardly projecting curved surfaces 23 between wall, curved surfaces 23 and the end face of phalanx 4 abut against, 5 shape of three-dimensional porous structure sheaf At on curved surfaces 23.By the setting, as shown in connection with fig. 2, needle-like portion 22 may extend into the pulp cavity 41 of phalanx 4 so as to Its subsequent rapid fusion with the bone tissue in pulp cavity 41, and the curved surfaces 23 being located at outside phalanx 4 can effectively increase it The contact area on surface and the end face of phalanx 4, so as to effectively ensure that the second broach prosthese 2 stability fixed with phalanx 4. In addition, the also adjustable second broach prosthese 2 of outwardly projecting radian by adjusting curved surfaces 23 and the height after the cooperation of phalanx 4 Degree, effectively to make up the length of the bone of 4 defect of phalanx.And by being further formed three-dimensional porous structure sheaf on curved surfaces 23 5, so that the outer surface of the second broach prosthese 2 is formed as porous structure, in this way, porous structure is but also curved surfaces 23 obtain The ability that better Bone Ingrowth and bone are creeped, to make that bone tissue in pulp cavity 41 can arcuately quickly to grow into its porous on surface 23 In structure, so that the fixation of the second broach prosthese 2 and phalanx 4 is more stable.

In preferred embodiment as shown in Figure 2, the curved surfaces 23 of spherical recess may include extending into phalanx 4 First surface 231 in pulp cavity 41 and the second surface 232 outside the pulp cavity 41 of phalanx 4, wherein be formed in first surface The equivalent diameter of each hole of three-dimensional porous structure sheaf 5 on 231 is greater than the three-dimensional porous structure being formed on second surface 232 The equivalent diameter of each hole in layer 5.Further, it is formed in each hole of the three-dimensional porous structure sheaf 5 on first surface 231 Equivalent diameter range be 200 μm to 400 μm, the controlled porosity in the region is between 50% to 60% at this time, into one Preferably 300 μm to 400 μm of step, controlled porosity is between 50% to 55%；The solid being formed on second surface 232 is more The range of the equivalent diameter of each hole in pore structure layer 5 be 100 μm to 200 μm, at this time controlled porosity 70% to Between 80%, further preferably 100 μm to 150 μm, controlled porosity is between 75% to 80%.

By above-mentioned setting, it is formed in the model of the equivalent diameter of the hole of the porous three dimensional structure layer 5 on first surface 231 It encloses when being 200 μm to 400 μm, can preferably promote Bone Ingrowth, so that the initial stage for keeping toe joint prosthese 100 displaced obtains More stable fixed effect；And the equivalent diameter of the hole of porous three dimensional structure layer 5 on second surface 232 is formed in 100 μ At m to 200 μm, bone is creeped the fastest of growth, so as to accelerate the bone of toe joint prosthese 100 displaced mid-term and later period The growth of tissue, and then promote the faster rehabilitation of patient.

In a preferred embodiment, it is formed in the three-dimensional porous structure sheaf of first surface 231 and second surface 232 5 thickness can be identical.Preferably, the thickness range of three-dimensional porous structure sheaf 5 is 1mm to 2mm, more preferably 1.5mm.Pass through The setting has the second broach prosthese 2 and is more conducive to the outer surface that Bone Ingrowth and bone are creeped, on the other hand also makes Second broach prosthese 2 has the ability of preferably carrying, conduction and dispersive stress load, so that toe joint prosthese 100 be made to obtain More stable using effect.

Certainly, the thickness for being formed in the three-dimensional porous structure sheaf 5 of first surface 231 and second surface 232 can also be different, The difference for the patient being applicable according to the second broach prosthese 2 can be designed specifically, such as when patient's Bone Ingrowth ability is poor When, it, can be by the phase of the thickness of the three-dimensional porous structure sheaf 5 of first surface 231 setting in order to guarantee the intensity of the second broach prosthese 2 Thickness than the three-dimensional porous structure sheaf 5 in second surface 232 is thicker.And when the bone of patient itself creep ability it is poor when, be The stability for guaranteeing the fixation of the second broach prosthese 1, can the thickness of the three-dimensional porous structure sheaf 5 of second surface 232 be arranged The thickness compared to the three-dimensional porous structure sheaf 5 of first surface 231 it is thicker.

In the embodiment as shown in fig.5, curved surfaces 23 are attached to the middle part of concave ball surfaces 211 and needle-like portion 22 Between periphery wall.By the setting, the three-dimensional porous structure sheaf 5 for being formed in curved surfaces 23 is made to can satisfy phalanx 4 more Under the premise of good Bone Ingrowth and faster bone is creeped, the material of three-dimensional porous structure sheaf 5 is saved, has avoided wasting.When So, curved surfaces 23 are also attached between the periphery wall of the middle and upper part of concave ball surfaces 211 and needle-like portion 22, or are connected to recessed Between the periphery wall of the middle and lower part of shape spherical surface 211 and needle-like portion 22, specific setting can according to the sufferer demand of different patients into Row setting, to meet the difference of the individuation of patient.

Preferably, the outer surface of needle-like portion 22 can be configured to rough surface.That is the outside that is located at curved surfaces 23 of needle-like portion 22 Outer surface can be configured to rough surface.Needle-like portion 22 can be fixed in the pulp cavity 41 of phalanx 4 by bone cement.It is set by this It sets, so that the outer surface of needle-like portion 22 has bigger contact area, facilitates bone cement for the pulp cavity of needle-like portion 22 and phalanx 4 41 stronger are fixed together.

As shown in Figure 3 and Figure 5, it is preferable that the first broach 11, the second broach 12 and porous three dimensional structure layer 5 can be integrated Molding and/or the second broach prosthese 2 can be integrally formed with porous three dimensional structure layer 5.Wherein, three-dimensional porous structure sheaf 5 can be by gold Belong to powder to be made, which can be titanium alloy, pure titanium or tantalum metal etc..Preferably, three-dimensional porous structure sheaf 5 is closed by titanium Golden material is made, and is preferably made of Ti6Al4V.First broach 11, the second broach 12 and the second broach prosthese 2 also can be by titaniums Alloy material is made.Not only make the processing of the first broach prosthese 1 and the second broach prosthese 2 more by integrally formed processing method It is convenient, while the interaction force between the first broach prosthese 1 and each component of the second broach prosthese 2 is also reduced, to make The overall structure of first broach prosthese 1 and the second broach prosthese 2 is more stable, and mechanical strength is more preferable.

According to the utility model, as shown in figure 3, being also formed with through the second broach 12 on the side wall of the second broach 12 One suture hole 122, the second suture hole that articulated joint 14 is formed through on one end of the second broach 12 of articulated joint 14 143.When the toe joint of human body needs to repair because of situations such as meeting with tumour or comminuted fracture, tend to cause toe The serious bone defect in joint, serious bone defect are easy to cause the joint capsule at toe joint to damage.By above-mentioned setting, can incite somebody to action Suturing soft tissue repairs or rebuilds damaged joint capsule between the first suture hole 122 and the second suture hole 143, to be conducive to The post-operative recovery of patient.

Preferably, being formed in the first suture hole 122 on the second broach 12 can be multiple, being formed in articulated joint 14 the Two suture holes 143 can also be multiple.It is further preferred that as shown in figure 3, the first suture hole being formed on the second broach 12 122 number can be equal to the number in the second suture hole 143 being formed in articulated joint 14, and each first suture hole 122 and each the Two suture holes 143 are close to the outside of toe joint 100.Preferably, each first suture hole 122 and each second suture hole 143 are equal It is arranged on same vertical line, to make the joint capsule sutured by the first suture hole 122 and the second suture hole 143 and human body Joint capsule is increasingly similar, further to promote its motion function after being implanted into toe joint prosthese 100.

It is further preferred that the diameter range in the first suture hole 122 and the second suture hole 143 can be 2.5mm to 4mm；Further Ground, the first suture hole 122 and the second suture hole 143 are specially the through-hole of the axial bending along corresponding hole, this has curved The axial length range of the through-hole of radian can be 2.5mm to 40mm.The specific length value can be used according in sewing process Suture looper diameter and suture looper curved radian determine, in order to which the operation of operation and soft tissue are preferably stitched It closes.

Finally it should be noted that above technical scheme is equally applicable to be applied to the palm toe of patient when toe joint prosthese 100 The case where displacement in joint, only need to be by the of the toe joint prosthese 100 that is, when toe joint prosthese 100 is palm toe joint prosthese For being connected with metacarpal bone, the second broach prosthese 2 is mentioned for being connected with phalanges with substituting in above-mentioned technical proposal one broach prosthese 1 The metatarsal and phalanx arrived, which is not described herein again.

The above various embodiments is only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned The utility model is described in detail in each embodiment, those skilled in the art should understand that: it still can be with It modifies the technical solutions described in the foregoing embodiments, or some or all of the technical features is equal Replacement；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution various embodiments of the utility model technical side The range of case should all cover in the claim of the utility model and the range of specification.Especially, as long as being not present Structural conflict, items technical characteristic mentioned in the various embodiments can be combined in any way.The utility model is simultaneously It is not limited to specific embodiment disclosed herein, but is included all technical solutions falling within the scope of the claims.

Claims (12)

1. a kind of toe joint prosthese, which is characterized in that the hinged including the first broach prosthese and with the first broach prosthese Two broach prostheses, the first broach prosthese include the first broach for being arranged in ossis and with the first broach phase The second broach for connecting and being located at outside ossis, second broach and the second broach prosthese are hinged, wherein described first The outer surface of broach and/or second broach and/or the second broach prosthese is formed with three-dimensional porous structure sheaf.

2. toe joint prosthese according to claim 1, which is characterized in that the toe joint prosthese is toe joint prosthese, Wherein, the first broach prosthese with metatarsal for being connected, and the second broach prosthese with phalanx for being connected, first marrow Needle is located inside the pulp cavity of the metatarsal, and second broach is located at outside the pulp cavity of the metatarsal and the end face with the metatarsal It abuts.

3. toe joint prosthese according to claim 1, which is characterized in that the toe joint prosthese is palm toe joint prosthese, Wherein, the first broach prosthese with metacarpal bone for being connected, and the second broach prosthese with phalanges for being connected, first marrow Needle is located inside the pulp cavity of the metacarpal bone, and second broach is located at outside the pulp cavity of the metacarpal bone and the end face with the metacarpal bone It abuts.

4. toe joint prosthese according to any one of claim 1 to 3, which is characterized in that the three-dimensional porous structure sheaf The multiple holes formed being crossed-over including a plurality of string diameter and by a plurality of string diameter, each hole is interconnected, and each hole Average diameter is different, wherein the equivalent diameter range of each hole is 100 μm to 400 μm, and the three-dimensional porous structure sheaf Porosity range be 50% to 80%.

5. toe joint prosthese according to any one of claim 1 to 3, which is characterized in that be formed in first broach Outer surface the three-dimensional porous structure sheaf in the equivalent diameter of each hole be greater than and be formed in the appearance of second broach The equivalent diameter of each hole in the three-dimensional porous structure sheaf in face.

6. toe joint prosthese according to any one of claim 1 to 3, which is characterized in that the first broach prosthese is also Including the articulated joint being fixedly connected with second broach, one end towards the second broach prosthese of the articulated joint is constructed For spherical, the second broach prosthese includes spherical recess, the edge face structure towards the articulated joint of the spherical recess For the concave ball surfaces cooperated with the spherical.

7. toe joint prosthese according to claim 6, which is characterized in that the second broach prosthese further includes and the ball The connected needle-like portion of shape recess portion, the spherical recess further include be connected to the concave ball surfaces and the needle-like portion periphery wall it Between outwardly projecting curved surfaces, the three-dimensional porous structure sheaf is formed on the curved surfaces.

8. toe joint prosthese according to claim 7, which is characterized in that the curved surfaces of the spherical recess include being used for Extend into the first surface in pulp cavity and the second surface outside pulp cavity, wherein form on the first surface vertical The equivalent diameter of each hole of body porous structure layer is greater than each in the three-dimensional porous structure sheaf being formed on the second surface The equivalent diameter of hole.

9. toe joint prosthese according to claim 8, which is characterized in that form three-dimensional porous on the first surface The range of the equivalent diameter of each hole of structure sheaf is 100 μm to 200 μm, the three-dimensional porous knot being formed on the second surface The range of the equivalent diameter of each hole in structure layer is 200 μm to 400 μm.

10. toe joint prosthese according to claim 6, which is characterized in that be also formed on the side wall of second broach Through the first suture hole of second broach, the articulated joint is formed through institute on one end of second broach State the second suture hole of articulated joint.

11. toe joint prosthese according to any one of claims 7 to 9, which is characterized in that the outer surface of the needle-like portion It is configured to rough surface.

12. toe joint prosthese according to any one of claims 1 to 3, which is characterized in that first broach, described Two broach and the porous three dimensional structure layer are integrally formed, and/or, the second broach prosthese and the porous three dimensional structure Layer is integrally formed.