CN215019772U - Prosthetic body for repairing defect of midfoot - Google Patents

Abstract

The utility model discloses a damaged prosthetic prosthesis of midfoot, it includes: the profile modeling main body is provided with a bone grafting cavity penetrating through the front and the back, the profile modeling main body is provided with a front bone connecting wing which can be connected with the front foot and a back bone connecting wing which can be connected with the back foot, and the front bone connecting wing and the back bone connecting wing are both provided with screw holes for bone screws to pass through. The profiling main body can restore the original physiological curvature of the arch of the foot of the patient, and the bone grafting cavities which penetrate through the arch of the foot are arranged, so that autogenous bones or artificial bones can be conveniently implanted into the bone grafting cavities, the implanted bones are promoted to be healed with the original talus, calcaneus and metatarsus of the patient into a whole after the operation, and the bone grafting fusion effect is achieved; the profile modeling main part sets up preceding coaptation wing and back coaptation wing, and preceding coaptation wing passes through bone screw and is connected with the forefoot, and the back coaptation wing passes through bone screw and is connected with the rearfoot, makes profile modeling main part and stable the being connected of skeleton, is favorable to bone tissue and profile modeling main part to integrate effectively, promotes bone defect repair effect, and furthest satisfies patient's demand, makes the patient resume foot motion function, is showing improvement postoperative life quality.

Description

Prosthetic body for repairing defect of midfoot

Technical Field

The utility model relates to the technical field of medical equipment, in particular to damaged prosthetic appliances of midfoot.

Background

The foot comprises a forefoot part, a middle foot part and a hindfoot part. The middle foot comprises a navicular bone, a cuboid bone, a medial cuneiform bone, a middle cuneiform bone and a lateral cuneiform bone, is a hinge connecting the front foot and the rear foot, plays a role in transferring gravity and associating toe movement, and is an important component of the foot. When severe comminuted fracture, osteonecrosis, bone tuberculosis or severe infection around the midfoot occur in the middle bones of navicular, cuboid and the like, the surgical removal of local tissue defects caused by the necrotic part is a problem often faced by orthopedists, and the problem generally needs to thoroughly debride local bone tissues of patients, reasonably apply antibiotics and reconstruct bone and soft tissue defects.

Wherein, the thorough debridement and the reasonable application of antibiotics only can reduce the recurrence of postoperative infection and are beneficial to the healing of bones after bone reconstruction, and the reconstruction of bone defects still needs traditional bone grafting, bone transportation, bone transplantation with blood vessels and the like.

The conventional reconstruction method has the following defects: the bone grafting has poor anti-infection capability, and the bone graft is easy to absorb after the bone graft is transplanted; the bone transportation takes long time, the nursing is difficult, and part of patients are difficult to tolerate the external fixing frame; the healing time of bones after vascular bone grafting is short, but physicians are required to be skilled in applying microsurgical techniques; the anatomical structure after traditional bone grafting is rebuilt recovers inadequately, and the stress state is poor, and the patient can't develop function exercise earlier etc..

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a defect repair prosthesis of midfoot to solve one or more technical problems that exist among the prior art, provide a profitable selection or create the condition at least.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a damaged prosthetic prosthesis of midfoot, it includes:

the profile modeling main part, it is equipped with the bone grafting chamber around running through, the profile modeling main part is equipped with the preceding bone wing that connects that can be connected with the forefoot and the back bone wing that can be connected with the hind foot, preceding bone wing and back bone wing all are equipped with the screw hole that supplies bone screw to pass through.

The utility model discloses following beneficial effect has at least: the profiling main body can be designed according to the anatomical form of the middle foot bone of the affected side foot or the opposite side foot of the patient before the operation, the maximum appearance of the fused navicular bone, the cuboid bone, the outer cuneiform bone, the middle cuneiform bone and the inner cuneiform bone of the patient is simulated, and the original physiological curvature of the arch of the foot of the patient is restored; the profiling main body is provided with bone grafting cavities which penetrate through the front and the back, so that autologous bones or artificial bones can be conveniently placed in the bone grafting cavities, the implanted bones can be healed with the original talus, calcaneus and metatarsus of a patient into a whole after operation, and the bone grafting fusion effect is achieved; the profile modeling main part sets up preceding coaptation wing and back coaptation wing, and preceding coaptation wing passes through bone screw and is connected with the forefoot, and the back coaptation wing passes through bone screw and is connected with the rearfoot, makes profile modeling main part and stable the being connected of skeleton, is favorable to bone tissue and profile modeling main part to integrate effectively, promotes bone defect repair effect, and furthest satisfies patient's demand, makes the patient resume foot motion function, is showing improvement postoperative life quality.

As a further improvement of the above solution, said contoured body is provided with an articular surface opposite the fourth and fifth metatarsal. The articular surfaces are located at the fourth and fifth tarsometatarsal joints and are contoured to mimic the articular surfaces of the tarsometatarsal joints to minimize irritation between the contoured body and the metatarsals, thereby allowing the patient to retain the mobility of the fourth and fifth metatarsals after surgery.

As a further improvement of the above technical solution, a first opening communicating with the bone grafting cavity is provided on the upper surface of the profile modeling main body. Set up first opening in the profile modeling main part, first opening communicates with each other with the bone grafting chamber, and the autogenous bone or the allogeneic bone that conveniently will accomplish the processing from first opening are implanted to the bone grafting intracavity to bone grafting intracavity is filled with the bone piece, thereby improves the effect that bone grafting fuses.

As a further improvement of the above technical means, an inner side surface of the copying body has a porous structure. The inner side surface of the profiling main body adopts a porous structure design, thereby being beneficial to the early formation of bone tissues, realizing the integration between the surrounding bone tissues and the profiling main body and further improving the mechanical stability of the local bone defect repair.

As a further improvement of the above technical solution, the bottom surface of the profiling main body is a porous structure. The bottom surface of the profiling main body adopts a porous structure design, thereby being beneficial to the early formation of bone tissues, realizing the integration between the surrounding bone tissues and the profiling main body and further improving the mechanical stability of the local bone defect repair.

As a further improvement of the technical scheme, the outer surface of the profiling main body is provided with lightening holes. The profiling main body is provided with the lightening holes, so that the weight of the profiling main body can be effectively reduced, and the postoperative discomfort of a patient caused by the unbalanced weight of feet on two sides is reduced.

As a further improvement of the above solution, the front bone-joining wing comprises a first bone-joining wing connectable with the first metatarsal, a second bone-joining wing connectable with the second metatarsal, and a third bone-joining wing connectable with the third metatarsal. The first bone-knitting wing is fixedly connected with the first metatarsal through a bone-knitting screw, the second bone-knitting wing is fixedly connected with the second metatarsal through a bone-knitting screw, and the third bone-knitting wing is fixedly connected with the third metatarsal through a bone-knitting screw, so that the profiling main body can be effectively connected with the forefoot, the vertical pressure and the rotating torque of the sole can be effectively shared, and the fracture between the profiling main body and the forefoot is avoided.

As a further improvement of the technical proposal, the rear bone fracture wing comprises a fourth bone fracture wing which can be connected with the calcaneus, and a fifth bone fracture wing and a sixth bone fracture wing which can be connected with the talus. The fourth bone-knitting wing passes through bone-knitting screw and calcaneus fixed connection, and fifth bone-knitting wing and sixth bone-knitting wing all pass through bone-knitting screw and talus fixed connection, not only make profile modeling main part and hind foot effective connection, moreover, can effectively share sole vertical pressure and rotation torque, avoid taking place the fracture between profile modeling main part and the hind foot.

As a further improvement of the above technical solution, a second opening capable of corresponding to the first metatarsal bone, the second metatarsal bone and the third metatarsal bone is arranged on the front side of the profiling main body, and the second opening is communicated with the bone grafting cavity; the trailing flank of profile modeling main part is equipped with the third opening that can correspond with calcaneum and talus, the third opening with the bone grafting chamber intercommunication. The profiling main body is provided with a second opening, so that the implanted bone in the bone grafting cavity can be healed with the first metatarsal bone, the second metatarsal bone and the third metatarsal bone of a patient into a whole after operation, and a better bone grafting fusion effect is achieved. The profile modeling main part sets up the third opening, makes the bone of putting into of bone grafting intracavity can heal with patient's calcaneus and talus bone as an organic whole after the operation, reaches the bone grafting of preferred and fuses the effect.

As a further improvement of the technical scheme, the profiling main body is a titanium alloy part, and the front bone fracture wing and the rear bone fracture wing are integrally formed with the profiling main body. The profiling main body, the front bone-knitting wings and the rear bone-knitting wings are all titanium alloy parts, can be manufactured by an additive manufacturing process, can be customized according to the requirement of a bone defect part of a patient by 1 to 1, has both mechanical property and biological property, and can become an optimal mode for repairing the bone defect.

Drawings

The present invention will be further explained with reference to the drawings and examples;

FIG. 1 is a perspective view of an embodiment of a midfoot defect repair prosthesis provided in the present invention;

FIG. 2 is a perspective view of an embodiment of the midfoot defect repair prosthesis provided in accordance with the present invention, taken from another perspective;

FIG. 3 is a perspective view of the midfoot defect repair prosthesis provided in the present invention in a state connected to the forefoot and hindfoot;

fig. 4 is a perspective view of the midfoot defect repair prosthesis from another perspective view in connection with the forefoot and hindfoot.

The drawings are numbered as follows: 100. a midfoot defect repair prosthesis; 110. a contoured body; 111. lightening holes; 112. an articular surface; 113. an inner side surface; 114. a bottom surface; 120. implanting a bone cavity; 130. a first bone-knitting wing; 140. a second bone-knitting wing; 150. a third bone-knitting wing; 160. a fourth bone-knitting wing; 170. a fifth bone-knitting wing; 180. a sixth fracture wing; 190. screw holes; 200. a forefoot; 210. a first metatarsal bone; 220. a second metatarsal; 230. the third metatarsal; 240. the fourth metatarsal; 250. the fifth metatarsal; 300. and (4) hind legs.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if words such as "a plurality" are used, the meaning is one or more, the meaning of a plurality of words is two or more, the meaning of more than, less than, more than, etc. is understood as not including the number, and the meaning of more than, less than, more than, etc. is understood as including the number. If any description to first, second and third is only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

It should be noted that the X direction in the drawings is from the posterior side to the anterior side of the midfoot defect repair prosthesis; the Y direction is from the left side of the midfoot defect repair prosthesis to the right side; the Z direction is from the underside of the midfoot defect repair prosthesis to the upside.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 4, several examples of the midfoot defect repair prosthesis of the invention will be described.

As shown in fig. 1-4, one embodiment of the present invention provides a midfoot defect repair prosthesis, the midfoot defect repair prosthesis 100 including a contoured body 110.

The shape of the copying main body 110 is designed according to the anatomical form of the middle foot bone of the affected side foot or the opposite side foot before the operation of the patient, and the copying main body 110 is used as the main body structure of the middle foot bone repair prosthesis, and simulates the maximum shape of the navicular bone, the cuboid bone, the lateral cuneiform bone, the middle cuneiform bone and the medial cuneiform bone of the patient after fusion and restores the physiological curvature of the original arch of the patient.

The profiling main body 110 is provided with a bone grafting cavity 120 which runs through the front and the back, the bone grafting cavity 120 is communicated with the front foot 200 and the rear foot 300, a clinician can place self bones or artificial bones in the bone grafting cavity 120, the implanted bone blocks are healed with the original talus, calcaneus and metatarsus of a patient into a whole, and finally the bone grafting fusion of the profiling main body 110 and the peripheral bone tissues is realized.

In this embodiment, the front side of the copying main body 110 is provided with a second opening corresponding to the first metatarsal 210, the second metatarsal 220 and the third metatarsal 230, and the second opening is communicated with the bone grafting cavity 120, so that the implanted autologous bone or artificial bone can pass through the second opening after the operation and be connected with the first metatarsal 210, the second metatarsal 220 and the third metatarsal 230 to be healed into a whole, thereby achieving the bone grafting fusion effect. The profile modeling main part 110's trailing flank is equipped with the third opening that can correspond with calcaneus and talus, and the third opening with plant bone cavity 120 intercommunication, so the design, the autologous bone of implanting or artificial bone can pass the third opening after the art, are connected with calcaneus and talus, heal into an organic whole, reach and plant the bone and fuse the effect.

The profile modeling main body 110 is provided with a front bone-knitting wing which can be connected with the front foot 200 and a rear bone-knitting wing which can be connected with the rear foot 300, the front bone-knitting wing and the rear bone-knitting wing are both provided with screw holes 190 for bone-knitting screws to pass through, one, two or more screw holes 190 can be arranged, and the screw holes 190 can be arranged in the middle of the front bone-knitting wing and the rear bone-knitting wing.

In this embodiment, the profiling main body 110 is a titanium alloy part, the front bone-knitting wings and the rear bone-knitting wings are integrally formed with the profiling main body 110 through an additive manufacturing process, 1 to 1 customization can be performed according to the needs of the bone defect part of a patient, the middle foot defect repair prosthesis has both mechanical property and biological property, the middle foot bone defect caused after the ankle surgical treatment is repaired, and the advantage of efficiently completing the bone defect repair is achieved.

In this embodiment, the anterior bone flap includes a first bone flap 130 connectable to a first metatarsal 210, a second bone flap 140 connectable to a second metatarsal 220, and a third bone flap 150 connectable to a third metatarsal 230.

The first bone flap 130 extends from the contoured body 110 in the direction of the coronal plane of the first metatarsal 210, the first bone flap 130 being shaped to match the anatomical shape of the first metatarsal 210. The second bone flap 140 extends from the contoured body 110 toward the coronal plane of the second metatarsal 220, and the second bone flap 140 is shaped to match the anatomy of the second metatarsal 220. The third bone flap 150 extends from the contoured body 110 toward the coronal plane of the third metatarsal 230, and the third bone flap 150 is shaped to match the anatomy of the third metatarsal 230.

The first bone fracture wing 130, the second bone fracture wing 140 and the third bone fracture wing 150 are all provided with two screw holes 190, metal bone screws are correspondingly inserted into the screw holes 190, so that the first bone fracture wing 130 is connected with the first metatarsal bone 210, the second bone fracture wing 140 is connected with the second metatarsal bone 220, the third bone fracture wing 150 is connected with the third metatarsal bone 230, and finally the fixed connection of the profiling main body 110 and the forefoot 200 is completed.

In this embodiment, the rear bone wings include a fourth bone wing 160 connectable to the calcaneus bone and fifth and sixth bone wings 170, 180 each connectable to the talus bone.

Fourth bone-engaging wing 160 extends from contoured body 110 in the direction of the lateral sagittal plane of the calcaneus bone, and fourth bone-engaging wing 160 is shaped to match the anatomy of the calcaneus bone. The fifth bone flap 170 extends from the contoured body 110 in the direction of the coronal plane of the talus, and the fifth bone flap 170 is shaped to match the anatomical shape of the talus. The sixth bone engaging wing 180 extends from the contoured body 110 in the direction of the medial sagittal plane of the talus, and the shape of the sixth bone engaging wing 180 matches the anatomical configuration of the talus.

The fourth bone-knitting wing 160, the fifth bone-knitting wing 170 and the sixth bone-knitting wing 180 are all provided with two screw holes 190, metal bone-knitting screws are correspondingly inserted into the screw holes 190, the fourth bone-knitting wing 160 is connected with the calcaneus, the fifth bone-knitting wing 170 and the sixth bone-knitting wing 180 are connected with the talus, and finally the fixed connection of the profiling main body 110 and the hind foot 300 is completed.

According to the analysis of foot bionic mechanics, a plurality of front bone-knitting wings and rear bone-knitting wings are arranged on the profiling main body 110, so that the vertical pressure and the rotation torque of the sole can be effectively shared, and the fracture between the profiling main body 110 and the front foot 200 or the rear foot 300 is avoided.

In this embodiment, the contoured body 110 is provided with an articular surface 112 opposite the fourth metatarsal 240 and the fifth metatarsal 250. The articular surface 112 is located on the anterior side of the contoured body 110 and to the left of the second opening, i.e., the articular surface 112 is located at the fourth tarsometatarsal joint and the fifth tarsometatarsal joint, and the articular surface 112 is contoured to mimic the articular surfaces of the tarsometatarsal joints and is finished with a finish that minimizes irritation between the contoured body 110 and the metatarsals, thereby promoting postoperative retention of mobility of the fourth metatarsal 240 and the fifth metatarsal 250 by the patient.

In this embodiment, the upper surface of the profile modeling main body 110 is provided with a first opening communicated with the bone grafting cavity 120, so that a clinician can implant the processed autologous bone or allogeneic bone into the bone grafting cavity 120 from the first opening, and the bone grafting cavity 120 is filled with bone blocks, thereby improving the effect of bone grafting fusion.

In this embodiment, the inner side surface 113 of the copying main body 110 is located at the inner arc surface of the original scaphoid and the inner cuneiform, the shape of the inner side surface 113 of the copying main body 110 can be designed according to the shape and structure of the middle foot bone of the affected side foot or the contralateral foot of the patient before operation, the inner side surface 113 of the copying main body 110 is a porous structure, that is, the inner side surface 113 of the copying main body 110 is provided with a plurality of through holes communicated with the bone grafting cavity 120, and the shape of the through holes can be triangular or circular.

In addition, the bottom surface 114 of the copying main body 110 is positioned at the bottom cambered surface of the original navicular bone, the inner cuneiform bone, the middle cuneiform bone, the outer cuneiform bone and the cuboid bone, the shape of the bottom surface 114 of the copying main body 110 can be designed according to the bone shape and the structure of the middle foot bone of the affected side foot or the contralateral foot of the patient before the operation, the original physiological curvature of the arch of the foot of the patient is restored to the maximum extent, the bottom surface 114 of the copying main body 110 is of a porous structure, that is, the bottom surface 114 of the copying main body 110 is provided with a plurality of through holes communicated with the bone grafting cavity 120, and the shape of the through holes can be triangular or circular.

The profiling main body 110 adopts the above porous structure design, and compared with a solid structure, the porous structure has biological performance superior to that of the solid structure on the basis of ensuring structural mechanics and connectivity, and can effectively promote the early formation of bone tissues, and simultaneously, the bone tissues grow in the porous structure, thereby realizing the effective integration between the bone tissues and the profiling main body 110 and improving the mechanical stability of the bone repair part.

In this embodiment, the profiling body 110 is designed to have a porous titanium alloy structure, and a connected, regular and ordered pore structure is formed inside the profiling body 110, so that a necessary space environment can be provided for the growth of bone tissues, the transportation of nutrients and metabolites is promoted, and the adhesion, proliferation and differentiation of bone-formation related cells are induced. Meanwhile, the elastic modulus of the material of the profiling main body 110 can be effectively reduced, the conduction of interface stress to the internal space of the profiling main body 110 is facilitated, mechanical stimulation is provided for the growth of bone tissues, the growth of the bone tissues in a pore structure is finally promoted, the fusion effect of the porous titanium alloy implant is enhanced, and a stable bone-metal interface is formed between a bone and a metal material, so that the profiling main body 110 is better fixed.

In this embodiment, the outer surface of the profile body 110 is provided with lightening holes 111. In the embodiment, the bottom surface 114 and the inner side surface 113 of the profiling body 110 are also provided with lightening holes 111, and the shape of the lightening holes 111 can be triangular or circular.

The profiling main body 110 adopts a porous structure and lightening holes 111, so that the weight of the profiling main body 110 can be effectively reduced, the total weight of the middle foot defect repair prosthesis can be promoted to reach 30 to 40 grams, the material is greatly saved, the postoperative discomfort of a patient caused by unbalanced weight of feet on two sides can be effectively reduced, and the difficulty of postoperative rehabilitation exercise of the patient can be reduced.

The utility model provides a damaged prosthetic appliances 100 of restoreing of well foot, its form can be with the bone form of forefoot 200, hind foot 300, the structure matches, carry out the design of imitative articular surface with joint contact department, make it be close with normal joint form, utilize porous structure to promote the growth of bone tissue simultaneously, and realize effective integration between bone tissue and the profile modeling main part 110, further improve the mechanical stability after the bone defect is restoreed, the at utmost satisfies the patient demand, make the patient resume foot motion function, show and improve postoperative life quality.

Firstly, the personalized design of the midfoot defect repair prosthesis 100 is completed preoperatively according to the three-dimensional CT scanning data of a patient and a given surgical scheme, and the preparation and the post-treatment of the midfoot defect repair prosthesis 100 are completed by adopting an additive manufacturing technology.

Then, the exposure of the operation area and the excision of the bone tissue (or the primary operation placement substitute) are completed according to the operation plan established by the patient and the operation range established during the virtual operation in the operation.

Then, the midfoot defect repair prosthesis 100 is implanted into a bone defect part of a patient, and is matched with a bone surface structure of a given peripheral bone tissue according to anatomical forms of a front bone-knitting wing and a rear bone-knitting wing fitted before an operation, the bone-knitting wings are adjusted to a proper position, a bone-knitting screw with a proper length is selected, and the peripheral normal bone tissue and the profiling main body 110 are locked by the bone-knitting screw passing through the screw hole 190 according to a screw set direction designed in a virtual operation.

Then, the processed autologous bone or allogeneic bone is implanted into the bone grafting cavity 120 from the first opening of the top surface of the profiling body 110, and the bone grafting cavity 120 is filled with bone blocks, so as to ensure better bone grafting fusion effect.

Finally, the surgical incision is sutured and the operation is completed according to the conventional surgical operation procedures, and the dead space is closed by adopting a suturing or bandaging mode according to the specific situation between the surrounding soft tissue and the profiling main body 110.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims (10)

1. A midfoot defect repair prosthesis, comprising:

the bone grafting device comprises a profiling main body (110) which is provided with a bone grafting cavity (120) penetrating through the front and the back, wherein the profiling main body (110) is provided with a front bone grafting wing which can be connected with a front foot (200) and a back bone grafting wing which can be connected with a back foot (300), and the front bone grafting wing and the back bone grafting wing are both provided with screw holes (190) for bone screws to pass through.

2. The midfoot defect repair prosthesis of claim 1 wherein the contoured body (110) provides an articular surface (112) opposite the fourth metatarsal (240) and the fifth metatarsal (250).

3. The midfoot defect repair prosthesis of claim 2 wherein the upper surface of the contoured body (110) is provided with a first opening communicating with the bone graft cavity (120).

4. The midfoot defect repair prosthesis of claim 3 wherein the medial side (113) of the contoured body (110) is of a porous structure.

5. The midfoot defect repair prosthesis of claim 4 wherein the bottom surface (114) of the contoured body (110) is a porous structure.

6. The midfoot defect repair prosthesis of claim 5 wherein an outer surface of the contoured body (110) is provided with lightening holes (111).

7. The midfoot defect repair prosthesis of claim 6, in which the anterior bone wings include a first bone wing (130) connectable to a first metatarsal (210), a second bone wing (140) connectable to a second metatarsal (220), and a third bone wing (150) connectable to a third metatarsal (230).

8. The midfoot defect repair prosthesis of claim 7, in which the rear bone wings include a fourth bone wing (160) connectable to a calcaneus bone and a fifth bone wing (170) and a sixth bone wing (180) both connectable to a talus bone.

9. The midfoot defect repair prosthesis of claim 8, wherein an anterior side of the contoured body (110) is provided with a second opening corresponding to a first metatarsal (210), a second metatarsal (220), and a third metatarsal (230), the second opening communicating with the bone graft cavity (120); the rear side face of the profiling main body (110) is provided with a third opening which can correspond to a calcaneus and a talus, and the third opening is communicated with the bone implanting cavity (120).

10. The midfoot defect repair prosthesis of any one of claims 1 through 9 wherein the contoured body (110) is a titanium alloy piece and the anterior and posterior bone wings are integrally formed with the contoured body (110).

Images