CN110192934B - Ilium wing filling prosthesis - Google Patents
Ilium wing filling prosthesis Download PDFInfo
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- CN110192934B CN110192934B CN201910459066.XA CN201910459066A CN110192934B CN 110192934 B CN110192934 B CN 110192934B CN 201910459066 A CN201910459066 A CN 201910459066A CN 110192934 B CN110192934 B CN 110192934B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/28—Bones
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/3094—Designing or manufacturing processes
- A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/28—Bones
- A61F2002/2835—Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
- A61F2002/30011—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in porosity
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/3079—Stepped or enlarged apertures, e.g. having discrete diameter changes
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Transplantation (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Prostheses (AREA)
Abstract
The invention relates to the technical field of medical prostheses, and discloses an ilium wing filling prosthesis. The ilium wing filling prosthesis comprises: a prosthesis body including a bone contacting surface for coupling with a surface of a bone defect of a human ilium, a soft tissue contacting surface for coupling with soft tissue of a human body, and a spinal surface for coupling with an outer edge of an ilium of the human ilium; a three-dimensional porous structure layer formed on the bone contact surface and/or the soft tissue contact surface and/or the ridge surface; at least one fixing piece which sequentially passes through the ridge surface and the bone contact surface to be connected with ilium of the human body so as to fix the prosthesis body on the ilium of the human body. The ilium wing filling prosthesis can fill ilium after bone removal better.
Description
Technical Field
The invention relates to the technical field of medical prostheses, in particular to an ilium wing filling prosthesis.
Background
The ilium is located in the centraxial pelvic region of the human body, participates in the formation of hip joints, the loading of lower limbs and the accommodation of pelvic viscera, and forms an important body curve together with the buttocks, thus being an important anatomical structure of human biomechanics and aesthetics. Because the bone mass of ilium is cancellous bone and the bone mass is relatively large, part of ilium is often taken as a material for human bone grafting in clinical medical operations. The ilium bone extraction bone grafting operation has wide clinical application, and is applied to patients with bone trauma, tumor, bone nonunion, joint repair and the like.
However, conventional clinical ilium extraction does not require any filling treatment after extraction, or only uses bone cement for filling, which easily results in the following defects of ilium after extraction: on the one hand, if the bone is not filled, the ilium can cause the depression of local bone after taking the bone, and the skin depression on the bone is easily pulled, so that the discomfort problems such as local irritation pain, compression pain and the like are caused; on the other hand, if the bone cement is not filled or only used for filling, the ilium on the left side and the right side is obviously asymmetric after the ilium is taken out of the bone, so that the beauty and the human body curve are directly influenced; in addition, when the bone taking amount of ilium is large, not only the stability of the hip joint is affected, but also the fracture of the upper ridge of ilium is caused, and the ilium forms a local weak area, so that the problem of hernia can occur in the internal pelvic viscera, and the viscera function is seriously affected.
In view of the shortcomings of the prior art, those skilled in the art are urgent to find an ilium wing filling prosthesis that can better fill the ilium after bone removal to make up for the shortcomings in the prior art.
Disclosure of Invention
In order to better fill the ilium after taking the bone, the invention provides an ilium wing filling prosthesis.
The ilium wing filling prosthesis according to the present invention comprises: a prosthesis body including a bone contacting surface for coupling with a surface of a bone defect of a human ilium, a soft tissue contacting surface for coupling with soft tissue of a human body, and a spinal surface for coupling with an outer edge of an ilium of the human ilium; a three-dimensional porous structure layer formed on the bone contact surface and/or the soft tissue contact surface and/or the ridge surface; at least one fixing piece which sequentially passes through the ridge surface and the bone contact surface to be connected with ilium of the human body so as to fix the prosthesis body on the ilium of the human body.
Further, the bone contacting surface comprises two opposite side planes formed on the prosthesis body and a bottom plane connecting the two side planes, the ridge surface comprises a top surface formed on the prosthesis body opposite to the bottom plane, the soft tissue contacting surface comprises two side curved surfaces connecting the bottom plane and the two side planes, at least one threaded hole extending to one side plane is formed on the top surface, the fixing piece is a screw matched with the threaded hole, and a three-dimensional porous structure layer is formed on the inner surface of the threaded hole and/or the outer surface of the screw.
Further, a plurality of screw holes extending to at least one side plane respectively are formed on the top surface, or a plurality of screw holes extending to both side planes respectively are formed on the top surface.
Further, the screw hole comprises a screw cap section which is coaxially connected and communicated with the top surface and a screw hole section which is communicated with the side plane, the screw comprises a screw section matched with the screw hole section and a screw cap accommodated in the screw cap section, wherein the inner diameter of the screw cap section is larger than or equal to the inner diameter of the screw hole section, and the axial length of the screw section is larger than the axial length of the screw hole section.
Further, the screw section comprises a first connecting section for connecting with the threaded hole section and a second connecting section coaxially connected with the first connecting section and for connecting with ilium of the human body, wherein the outer diameter of the second connecting section is smaller than that of the first connecting section.
Further, the prosthesis body further comprises a baffle structure fixedly connected with the two side curved surfaces and the bottom plane at the same time, a groove for clamping ilium of a human body is formed at the bottom end of the baffle structure, and a three-dimensional porous structure layer is formed on the inner surface of the groove.
Further, the three-dimensional porous structure layer includes a plurality of wire diameters and a plurality of pores formed by the plurality of wire diameters being connected to each other in a staggered manner, each pore being connected to each other, wherein the diameter of each pore is in the range of 10 μm to 800 μm, the porosity of the three-dimensional porous structure layer is in the range of 30% to 80%, the diameters of each pore in the three-dimensional porous structure layer formed on the bone contact surface and the three-dimensional porous structure layer formed on the inner surface of the groove are equal, and the diameter of each pore in the three-dimensional porous structure layer formed on the bone contact surface is larger than the diameter of each pore in the three-dimensional porous structure layer formed on the soft tissue contact surface.
Further, each pore in the three-dimensional porous structure layer formed on the bone contact surface and the three-dimensional porous structure layer formed on the inner surface of the groove has a diameter ranging from 100 μm to 400 μm, and the three-dimensional porous structure layer has a porosity ranging from 50% to 80%; the diameter of each pore in the three-dimensional porous structure layer formed on the bone contact surface ranges from 10 μm to 100 μm, and the porosity of the three-dimensional porous structure layer ranges from 30% to 60%.
Further, the thickness of the three-dimensional porous structure layer formed on the inner surface of the groove ranges from 1mm to 1.5mm, and the thickness of the baffle structure is greater than the thickness between the two side curved surfaces by a range from 1mm to 2mm.
Further, the diameters of the respective pores of the three-dimensional porous structure layer formed on the screw holes are in the range of 200 μm to 400 μm, and the porosities of the three-dimensional porous structure layer are in the range of 60% to 80%, and the diameters of the respective pores of the three-dimensional porous structure layer formed on the screw are in the range of 200 μm to 600 μm, and the porosities of the three-dimensional porous structure layer are in the range of 50% to 80%.
The ilium wing filling prosthesis of the present invention has several benefits:
1) The three-dimensional porous structure layer enables the bone contact surface to have larger contact area with the ilium wing bone, namely the outer surface of the bone contact surface obtains better bone ingrowth capacity, and the ilium wing bone can grow into the porous structure rapidly, thereby being beneficial to the stable fixation of the ilium wing filling prosthesis and the ilium wings of the human body;
2) The three-dimensional porous structure layer also enables the outer surface of the soft tissue contact surface and/or the ridge surface to obtain better bone crawling capability, and ilium wing bone can quickly grow into the porous structure along the outer surface of the soft tissue contact surface and/or the ridge surface, so that the ilium wing filling prosthesis is more stable in fixation with ilium of a human body;
3) The porous structure is formed on the outer surface of the soft tissue contact surface and/or the ridge surface, and the attachment points of the soft tissue of the human body can be rebuilt on the outer surface of the soft tissue contact surface and/or the ridge surface, so that the ilium wing filling prosthesis and the soft tissue of the human body are fused more quickly, the postoperative recovery time of a patient is effectively reduced, and the postoperative recovery effect of the patient is greatly improved;
4) The prosthesis body of the ilium wing filling prosthesis is subjected to customized production, so that the prosthesis body can be more suitable for the shape of the defect of the ilium wing of a patient, and the symmetry of the ilium wings at the left side and the right side can be better obtained after the ilium wing filling prosthesis is filled by the ilium wings of the human body, thereby effectively improving the aesthetic effect of the ilium wings after being filled;
5) The three-dimensional porous structure layer is formed on the inner surface of the threaded hole and/or the outer surface of the screw, so that the fixation stability of the ilium wing filling prosthesis can be further improved, the phenomenon that a patient breaks due to the double effects of shearing force applied to the screw and electrochemical corrosion in a human body in the moving process is avoided, the phenomenon that the screw is separated from the prosthesis to form metal foreign matters in the human body is effectively avoided, the free phenomenon of the screw in the patient is caused, and further the damage to the patient is effectively avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic structural view of an ilium wing filling prosthesis according to the present invention, wherein the fixation elements are not shown;
FIG. 2 is a side view of the ilium wing filling prosthesis shown in FIG. 1;
FIG. 3 is a schematic view of the structure of the anchor of the ilium wing filling prosthesis according to the invention;
fig. 4 is an osteotomy tool for bone removal of the ilium wings of a human body.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
Fig. 1 and 2 show the structure of an ilium wing filling prosthesis 100 according to the invention. As shown in fig. 1 and 2, the ilium wing filling prosthesis 100 includes: a prosthesis body 1, the prosthesis body 1 comprising a bone contact surface 11 for connection to a surface of a bone defect of a human iliac wing, a soft tissue contact surface 12 for connection to a soft tissue of a human body, and a ridge surface 13 for engagement with an outer edge of an iliac crest of the human iliac wing; a three-dimensional porous structure layer 2, the three-dimensional porous structure layer 2 being formed on the bone contact surface 11 and/or the soft tissue contact surface 12 and/or the ridge surface 13; at least one fixing member 3 (as shown in fig. 3), the fixing member 3 is connected to the ilium wings of the human body through the ridge surface 13 and the bone contact surface 11 in order to fix the prosthesis body 1 to the ilium wings of the human body.
When the ilium wing filling prosthesis 100 of the present invention is used, firstly, the bone cutting tool shown in fig. 4 is adopted to take bones from the edges of the ilium wings, the bone taking positions are the bone defect positions, the prosthesis body 1 of the ilium wing filling prosthesis 100 of the present invention is customized according to the shapes of the bone defect positions, the bone contact surface 11 of the prosthesis body 1 is matched with the bone surface of the bone defect positions, the soft tissue contact surface 12 of the prosthesis body 1 is constructed to be the same as the soft tissue contact surface of the bone defect positions, and meanwhile, the prosthesis body 1 is fixed on the ilium wings of a human body through the fixing pieces 3, so that the ilium wing filling prosthesis 100 of the present invention fills the ilium wing defect positions of the human body.
The ilium wing filling prosthesis 100 of the present invention has a three-dimensional porous structure layer 2 formed on the bone contacting surface 11 and/or soft tissue contacting surface 12 and/or the spinal surface 13. With this arrangement, the ilium wing filling prosthesis 100 of the present invention has several benefits:
1) By customizing the prosthesis body 1 of the ilium wing filling prosthesis 100, the prosthesis body 1 can be more suitable for the shape of the defect of the ilium wing of the patient, so that the ilium wing of the human body can better obtain the symmetry of the ilium wings at the left side and the right side after being filled by the ilium wing filling prosthesis 100, thereby effectively improving the aesthetic effect of the ilium wing after being filled;
2) The three-dimensional porous structure layer 2 enables the bone contact surface 11 to have a larger contact area with the ilium wing bone, namely, the outer surface of the bone contact surface 11 obtains better bone ingrowth capacity, and the ilium bone can grow into the porous structure rapidly, thereby being beneficial to the stable fixation of the ilium wing filling prosthesis 100 and the ilium wings of a human body;
3) The three-dimensional porous structure layer 2 also enables the outer surface of the soft tissue contact surface 12 and/or the ridge surface 13 to obtain better bone crawling capability, and ilium wing bone can quickly grow into the porous structure along the outer surface of the soft tissue contact surface 12 and/or the ridge surface 13, so that the ilium wing filling prosthesis 100 is more stable in fixation with ilium wings of a human body;
4) The porous structure is formed on the outer surface of the soft tissue contact surface 12 and/or the ridge surface 13, and the attachment points of the soft tissue of the human body can be rebuilt on the outer surface of the soft tissue contact surface 12 and/or the ridge surface 13, so that the ilium wing filling prosthesis 100 can be fused with the soft tissue of the human body more quickly, the postoperative recovery time of a patient can be effectively reduced, and the postoperative recovery effect of the patient can be greatly improved.
In a preferred embodiment as shown in fig. 1, the bone contacting surface 11 may comprise two opposite side planes 111 formed on the prosthesis body 1 and a bottom plane 112 connecting the two side planes 111, the ridge surface 13 may comprise a top surface 131 formed on the prosthesis body 1 opposite the bottom plane 112, the soft tissue contacting surface 12 may comprise two side curved surfaces 121 connecting the bottom plane 112 and the two side planes 111 (as shown in fig. 2), at least one threaded hole 132 extending to one side plane 111 may be formed on the top surface 131, the fixation member 3 may be a screw (as shown in connection with fig. 3) threadedly engaged with the threaded hole 132, and a three-dimensional porous structure layer 2 may be formed on an inner surface of the threaded hole 132 and/or an outer surface of the screw.
Through the arrangement, the inner surface of the threaded hole 132 and/or the outer surface of the screw (i.e. the fixing piece 3) can be formed into a porous structure, and the porous structure can increase the friction between the screw and the threaded hole 132 on one hand, so that the screw is difficult to separate again after being matched with the threaded hole 132, and the fixing and stabilizing effects of the ilium wing filling prosthesis 100 can be improved; on the other hand, the outer surface of the screw and/or the inner surface of the threaded hole 132 can obtain better bone ingrowth and bone crawling capability, so that bone can grow into the three-dimensional porous structure layer 2 quickly, and the bone can provide additional fixing effect for the screw due to the fact that the bone grows into the three-dimensional porous structure layer 2 more easily, so that the fixing effect of the screw is further enhanced, the stability of the fixation of the ilium wing filling prosthesis 100 can be further improved, the phenomenon that in the prior art, the screw is broken due to the shearing force and electrochemical corrosion in the human body in the moving process of a patient is effectively avoided, metal foreign matters are effectively prevented from being formed in the human body due to the fact that the screw is separated from the prosthesis, free phenomena in the patient body are caused, and damage to the patient is effectively avoided.
In a preferred embodiment, the top surface 131 may have a plurality of threaded holes 132 formed thereon, which extend to at least one side plane 111, respectively, or the top surface 131 may have a plurality of threaded holes 132 formed thereon, which extend to both side planes 111, respectively, to further enhance the stability of the fixation of the ilium wing filling prosthesis 100. Preferably, the top surface 131 may have a plurality of screw holes 132 formed therein extending to the two side planes 111, respectively.
In the preferred embodiment shown in fig. 1, the threaded bore 132 may include a nut segment 133 in communication with the top surface 131 and a threaded bore segment 134 in communication with the side surface 111, and as shown in connection with fig. 3, the screw 3 may include a screw segment 31 that mates with the threaded bore segment 134 and a nut 32 that is received within the nut segment 133. Wherein, the inner diameter of the nut section 133 may be greater than or equal to the inner diameter of the threaded bore section 134, and the axial length of the screw section 31 may be greater than the axial length of the threaded bore section 134. When in use, the screw 3 passes through the nut section 133 and is connected with the threaded hole section 134 in a threaded manner and is connected with the bone of a human body, and meanwhile, the top cap of the screw is positioned in the nut section 133. With this arrangement, on the one hand, the smaller inner diameter of the threaded hole section 134 than the inner diameter of the nut section 133 can limit the screwed-in position of the screw, thereby enabling the prosthesis body 1 to be effectively fixed by the screw; on the other hand, the nut segment 133 may also accommodate the top cap 32 of the screw, so that the screw can be fully positioned within the prosthesis body 1, so that the screw inserted into the prosthesis body 1 through the land 13 does not affect the degree of matching of the land 13 with the outer edge of the iliac crest of the iliac wing of the human body, thereby making the iliac wing filled with the iliac wing filling prosthesis 100 of the present invention more aesthetically pleasing after filling.
Preferably, the outer surface of the nut 32 and/or the inner surface of the nut section 133 are formed with a three-dimensional porous structure layer 2 to increase friction between the nut 32 and the nut section 133 on the one hand, so that the nut 32 is difficult to separate after being matched with the nut section 133; on the other hand, the outer surface of the nail cap 32 and/or the inner surface of the nail cap section 133 can obtain better bone ingrowth and bone crawling capability, so that bone can grow into the three-dimensional porous structure layer 2 quickly, and the fixation effect of the ilium wing filling prosthesis 100 is further improved.
Also preferably, the axial length of the screw segment 31 may be set to: the length that can extend at least into the ilium of the human body after connection with the threaded bore section 134 ranges from 15mm to 25mm. Preferably 20mm. By this arrangement, the screw can be made to better fix the prosthesis body 1.
In a preferred embodiment as shown in fig. 3, the screw segment 31 may comprise a first connection segment 311 for connection with the threaded bore segment 134 and a second connection segment 312 coaxially connected with the first connection segment 311 and for connection with the iliac wing of the human body. Wherein, the outer diameter of the second connection section 312 may be smaller than the outer diameter of the first connection section 311. Here, the outer diameters of the first and second connection sections 311 and 312 in the present invention should be understood to include the thickness value of the three-dimensional porous structure layer 2 formed on the outer surface thereof.
Preferably, the thickness of the three-dimensional porous structure layer 2 formed at the outer surface of the second connection section 312 may be smaller than the thickness of the three-dimensional porous structure layer 2 formed at the outer surface of the first connection section 311, and the thickness of the three-dimensional porous structure layer 2 formed at the screw hole 132 may be larger than the thickness of the three-dimensional porous structure layer 2 formed at the outer surface of the first connection section 311. By this arrangement, the ability of the bone of the outer surface of the screw to creep is gradually increased from the outer surface of the second connecting section 312, the outer surface of the first connecting section 311 and the inner surface of the threaded bore 132 in sequence, so that the surfaces of the three can all have better coverage of bone to enhance the strength and stability of the fixed ilium wing filling prosthesis 100 thereof.
Further preferably, the thickness of the three-dimensional porous structure layer 2 formed on the outer surface of the first connection section 311 may range from 1mm to 2mm; the thickness of the three-dimensional porous structure layer 2 formed on the outer surface of the second connection section 312 ranges from 0.5mm to 1mm; the thickness of the three-dimensional porous structure layer 2 formed on the screw hole 132 ranges from 4mm to 10mm.
Still more preferably, the threaded hole 132 may be machined by first machining the threaded hole 132 into a through hole and then tapping the through hole. Wherein the diameter of the through hole can be set to be 3.3mm to 6.2mm, preferably 3.3 to 3.7mm, 4.3 to 4.7mm, 5 to 5.4mm, 5.8 to 6.2mm. After the through hole is machined, the through hole is tapped 1 to 6 times by using a machined screw, and the specific number of tapping times can be determined according to the matched screwing-out torque of the screw and the threaded hole 132. Through this setting, can guarantee the intensity of threaded hole 132 and the threaded connection of screw, and the screwing-out moment of torsion of screw to can improve the stability of both connections effectively, and then improve the fixed effect of corresponding prosthesis.
In a preferred embodiment as shown in fig. 1, the prosthesis body 1 may further include a barrier structure 4 fixedly coupled to both the side curved surfaces 121 and the bottom plane 112 at the same time, and as shown in connection with fig. 2, a bottom end of the barrier structure 4 may be formed with a groove 41 for clamping ilium wings of a human body, and an inner surface of the groove 41 may be formed with a three-dimensional porous structure layer 2. By this arrangement, the rotation of the ilium wing filling prosthesis 100 when being fixed by the screw can be prevented by the cooperation of the groove 41 with the ilium of the human body, so as to improve the stability of the connection of the ilium wing filling prosthesis 100; meanwhile, the three-dimensional porous structure layer 2 is formed on the inner surface of the groove 41, and the bone ingrowth capability of the bone at the groove 41 can be improved, so that the fixation stability of the ilium wing filling prosthesis 100 is further improved. In addition, the arrangement of the grooves 41 can also effectively compensate for the osteotomy at the junction of the baffle structure 4 and the ilium wings, so as to reduce the osteotomy of the ilium wings, thereby effectively improving the strength of the ilium wings of the human body.
It should be noted that, the baffle structure 4 can be customized according to the appearance and the dimension of the ilium of the patient, so as to improve the matching degree with the ilium of the human body and improve the comfort degree of the human body.
It is noted that the above three-dimensional porous structure layer 2 may include a plurality of wire diameters and a plurality of pores formed by the plurality of wire diameters being connected to each other in a staggered manner, and the respective pores are connected to each other, wherein the diameter of each pore may preferably be in the range of 10 μm to 800 μm, and the porosity of the three-dimensional porous structure layer 2 may preferably be in the range of 30% to 80%. Preferably, the diameters of the respective pores in the three-dimensional porous structure layer 2 formed on the bone contact surface 11 and the three-dimensional porous structure layer 2 formed on the inner surface of the groove 41 may be equal, and the diameters of the respective pores in the three-dimensional porous structure layer 2 formed on the bone contact surface 11 may be larger than the diameters of the respective pores in the three-dimensional porous structure layer 2 formed on the soft tissue contact surface 12.
Through mutually communicating each pore formed by mutually staggered connection of wire diameters, the diameter and the size of each pore are not consistent, and the diameter and the porosity range of the pore of the three-dimensional porous structure are specifically set, so that the structure of the three-dimensional porous structure layer 2 is more similar to the bone trabecular structure of a human body, the three-dimensional porous structure layer 2 with higher porosity and connectivity can well induce bone ingrowth, so that bones of the human body can quickly and naturally grow into the pores of the three-dimensional porous structure layer 2, the adhesion, proliferation and differentiation capacity of osteoblasts are improved, the growth and crawling of ilium bones are effectively promoted, and the ilium wing filling prosthesis 100 is further beneficial to the rapid fusion and fixation of the ilium bones of the human body after operation, and the postoperative recovery effect of a patient is effectively improved.
It should be noted that the cross section of each pore formed by the wire diameter is not a regular circle, and the cross-sectional shape thereof may be various shapes, and therefore, references herein to "diameter" of each pore should be understood as the diameter of each circle when the cross section of each pore is equivalent to the circle. Since the diameter of the cross section equivalent to a circle is calculated according to the actual area of the cross section, the value of the obtained diameter is an accurate value.
Preferably, the three-dimensional porous structure layer 2 may be printed by 3D technology using a metal powder, which may be titanium alloy, pure titanium, tantalum metal, or the like. Preferably, the three-dimensional porous structure layer 2 is made of a titanium alloy material, preferably Ti6Al 4V.
It is also preferable that the diameter range of each pore in the three-dimensional porous structure layer 2 formed on the bone contact surface 11 and the three-dimensional porous structure layer 2 formed on the inner surface of the groove 41 may be preferably 100 μm to 400 μm, and the porosity of the three-dimensional porous structure layer 2 may be preferably 50% to 80%, in order to improve the bone ingrowth capacity thereat; the diameter of each pore in the three-dimensional porous structure layer 2 formed on the soft tissue contacting surface 12 and/or the ridge surface 13 may preferably be in the range of 10 μm to 100 μm, and the porosity of the three-dimensional porous structure layer 2 may be in the range of 30% to 60%, in order to enhance bone crawling ability thereat.
Preferably, the thickness of the three-dimensional porous structure layer 2 formed on the inner surface of the groove 41 may preferably range from 1mm to 1.5mm to facilitate bone ingrowth into the inner surface of the groove 41; the thickness of the baffle structure 4 is preferably in a range of 1mm to 2mm greater than the thickness between the two side curved surfaces 121, thereby reducing the size of the baffle structure 4 protruding from the ilium surface of the human body to effectively reduce the foreign body sensation and improve the comfort of the human body.
Preferably, the diameter of each pore of the three-dimensional porous structure layer 2 formed on the screw hole 132 may preferably range from 200 μm to 400 μm, and the porosity of the three-dimensional porous structure layer 2 may range from 60% to 80%; the diameter of each pore in the three-dimensional porous structure layer 2 formed on the screw 4 may preferably range from 200 μm to 600 μm, and the porosity of the three-dimensional porous structure layer 2 may range from 50% to 80%.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (6)
1. An ilium wing filling prosthesis comprising:
A prosthesis body including a bone contacting surface for coupling with a surface of a bone defect of a human iliac wing, a soft tissue contacting surface for coupling with a soft tissue of a human, and a ridge surface for engaging an outer edge of an iliac crest of the human iliac wing;
A three-dimensional porous structural layer formed on the bone contacting surface, the soft tissue contacting surface, and the spinal surface;
At least one fixing piece which sequentially passes through the ridge surface and the bone contact surface to be connected with the ilium wing of the human body so as to fix the prosthesis body on the ilium wing of the human body;
Wherein the bone contacting surface comprises two opposite side planes formed on the prosthesis body and a bottom plane connecting the two side planes, the ridge surface comprises a top surface formed on the prosthesis body opposite to the bottom plane, the soft tissue contacting surface comprises two side curved surfaces connecting the bottom plane and the two side planes, at least one threaded hole extending to one side plane is formed on the top surface, the fixing piece is a screw in threaded fit with the threaded hole, and the three-dimensional porous structure layer is formed on the inner surface of the threaded hole and the outer surface of the screw; the screw comprises a screw cap section matched with the screw hole section and a screw cap accommodated in the screw cap section, wherein the inner diameter of the screw cap section is larger than or equal to that of the screw hole section, and the axial length of the screw section is larger than that of the screw hole section; the screw section comprises a first connecting section and a second connecting section, wherein the first connecting section is used for being connected with the threaded hole section, the second connecting section is coaxially connected with the first connecting section and used for being connected with an ilium wing of a human body, and the outer diameter of the second connecting section is smaller than that of the first connecting section; the prosthesis body further comprises a baffle structure fixedly connected with the side curved surface and the bottom plane at the same time, a groove for clamping ilium wings of a human body is formed at the bottom end of the baffle structure, and the inner surface of the groove is provided with the three-dimensional porous structure layer.
2. The ilium wing filling prosthesis of claim 1, wherein the top surface has formed thereon a plurality of threaded bores extending to at least one of the side planes, respectively, or wherein the top surface has formed thereon a plurality of threaded bores extending to two of the side planes, respectively.
3. The ilium wing filling prosthesis of claim 1, wherein the three-dimensional porous structure layer includes a plurality of wire diameters and a plurality of pores formed by the plurality of wire diameters being connected to each other in a staggered manner, the pores being connected to each other, wherein the diameter of each pore is in a range of 10 μm to 800 μm, the porosity of the three-dimensional porous structure layer is in a range of 30% to 80%, the diameters of each pore in the three-dimensional porous structure layer formed on the bone contact surface and the three-dimensional porous structure layer formed on the inner surface of the groove are equal, and the diameter of each pore in the three-dimensional porous structure layer formed on the bone contact surface is larger than the diameter of each pore in the three-dimensional porous structure layer formed on the soft tissue contact surface.
4. The ilium wing filling prosthesis of claim 3, wherein each pore in the three-dimensional porous structure layer formed on the bone contacting surface and the three-dimensional porous structure layer formed on the inner surface of the groove has a diameter ranging from 100 μιη to 400 μιη and a porosity of the three-dimensional porous structure layer ranging from 50% to 80%; the diameter of each pore in the three-dimensional porous structure layer formed on the soft tissue contact surface is in the range of 10 μm to 100 μm, and the porosity of the three-dimensional porous structure layer is in the range of 30% to 60%.
5. The ilium wing filling prosthesis of claim 1, wherein the thickness of the three-dimensional porous structure layer formed on the inner surface of the groove ranges from 1mm to 1.5mm.
6. The ilium wing filling prosthesis of claim 1, wherein a diameter of each pore in the three-dimensional porous structure layer formed in the threaded hole ranges from 200 μιη to 400 μιη, and a porosity of the three-dimensional porous structure layer ranges from 60% to 80%, a diameter of each pore in the three-dimensional porous structure layer formed on the screw ranges from 200 μιη to 600 μιη, and a porosity of the three-dimensional porous structure layer ranges from 50% to 80%.
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| CN110680564B (en) * | 2019-10-31 | 2025-01-21 | 北京爱康宜诚医疗器材有限公司 | Bone filling prosthesis |
| CN110680565A (en) * | 2019-10-31 | 2020-01-14 | 北京爱康宜诚医疗器材有限公司 | Bone filling prosthesis |
| CN110840630A (en) * | 2019-11-26 | 2020-02-28 | 北京市春立正达医疗器械股份有限公司 | Tibial plateau holds in palm and uses its knee joint prosthesis |
| CN111134910A (en) * | 2020-01-13 | 2020-05-12 | 北京市春立正达医疗器械股份有限公司 | Calcaneus prosthesis |
| CN112137765A (en) * | 2020-08-17 | 2020-12-29 | 上海市第六人民医院 | 3D printed universal ilium wing prosthesis |
| CN114028034A (en) * | 2021-11-10 | 2022-02-11 | 上海市第六人民医院 | An easy-to-install iliac wing filling block |
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