CN118845312B - Pelvic prosthesis with bionic axial joint function - Google Patents
Pelvic prosthesis with bionic axial joint function Download PDFInfo
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- CN118845312B CN118845312B CN202411341752.4A CN202411341752A CN118845312B CN 118845312 B CN118845312 B CN 118845312B CN 202411341752 A CN202411341752 A CN 202411341752A CN 118845312 B CN118845312 B CN 118845312B
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- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 30
- 230000008407 joint function Effects 0.000 title claims abstract description 18
- 210000003131 sacroiliac joint Anatomy 0.000 claims abstract description 19
- 230000006870 function Effects 0.000 claims abstract description 14
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 13
- 210000003484 anatomy Anatomy 0.000 claims abstract description 9
- 230000002441 reversible effect Effects 0.000 claims abstract description 9
- 210000003692 ilium Anatomy 0.000 claims description 76
- 210000000588 acetabulum Anatomy 0.000 claims description 27
- 238000013461 design Methods 0.000 claims description 20
- 210000004197 pelvis Anatomy 0.000 claims description 18
- 210000003689 pubic bone Anatomy 0.000 claims description 15
- 210000001696 pelvic girdle Anatomy 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 12
- 210000002239 ischium bone Anatomy 0.000 claims description 11
- 230000009545 invasion Effects 0.000 claims description 6
- 241001272720 Medialuna californiensis Species 0.000 claims description 5
- 206010064390 Tumour invasion Diseases 0.000 claims description 5
- 230000037182 bone density Effects 0.000 claims description 5
- 230000009400 cancer invasion Effects 0.000 claims description 5
- 238000002513 implantation Methods 0.000 claims description 5
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 238000005457 optimization Methods 0.000 claims description 4
- 230000010354 integration Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 206010061336 Pelvic neoplasm Diseases 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 210000001981 hip bone Anatomy 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 235000001968 nicotinic acid Nutrition 0.000 description 2
- 230000002980 postoperative effect Effects 0.000 description 2
- 241001079814 Symphyotrichum pilosum Species 0.000 description 1
- 235000004224 Typha angustifolia Nutrition 0.000 description 1
- 210000001789 adipocyte Anatomy 0.000 description 1
- 210000004883 areola Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000845 cartilage Anatomy 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035790 physiological processes and functions Effects 0.000 description 1
- 210000004061 pubic symphysis Anatomy 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000002271 resection Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 210000004881 tumor cell Anatomy 0.000 description 1
Classifications
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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
- A61F2/30—Joints
- A61F2/32—Joints for the hip
-
- 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
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
-
- 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
- A61F2/32—Joints for the hip
- A61F2002/3208—Bipolar or multipolar joints, e.g. having a femoral head articulating within an intermediate acetabular shell whilst said shell articulates within the natural acetabular socket or within an artificial outer shell
-
- 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
- A61F2/32—Joints for the hip
- A61F2002/3241—Joints for the hip having a ring, e.g. for locking the femoral head into the acetabular cup
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
一种具有仿生轴关节功能的骨盆假体，属于医用假体领域，包括骶髂平台和髂骨复合体；所述的骶髂平台的上部分别设置有轴关节面和耳状面，轴关节面和耳状面所在的平面夹角为135°±10°，下部设置有套筒连接杆，套筒连接杆上设置有数个连接杆螺孔；所述的髂骨复合体上端设置有套筒，套筒侧壁开设有数个套筒螺孔；所述的骶髂平台的套筒连接杆穿套在髂骨复合体的套筒内，大小相应；本发明具有仿生骶髂界面轴向骶髂关节的解剖结构和人体限制骶骨章动及反向章动作用，通过骶骨轴关节面、耳状面双界面固定，不仅降低了骶骨横钉的剪切应力，还增加了骶骨骨整合面积，提高假体稳定，最终实现假体的短期稳定性及长期有效性。
A pelvic prosthesis with bionic axial joint function belongs to the field of medical prosthesis, comprising a sacroiliac platform and an iliac complex; the upper part of the sacroiliac platform is respectively provided with an axial joint surface and an ear-shaped surface, the plane angle between the axial joint surface and the ear-shaped surface is 135°±10°, the lower part is provided with a sleeve connecting rod, and the sleeve connecting rod is provided with a plurality of connecting rod screw holes; the upper end of the iliac complex is provided with a sleeve, and the side wall of the sleeve is provided with a plurality of sleeve screw holes; the sleeve connecting rod of the sacroiliac platform is inserted into the sleeve of the iliac complex, and the size is corresponding; the present invention has the anatomical structure of the axial sacroiliac joint of the bionic sacroiliac interface and the human body's function of limiting sacral nutation and reverse nutation, and is fixed by the sacral axial joint surface and the ear-shaped surface double interface, which not only reduces the shear stress of the sacral transverse nail, but also increases the sacral bone integration area, improves the stability of the prosthesis, and finally achieves the short-term stability and long-term effectiveness of the prosthesis.
Description
Technical Field
The invention relates to the field of medical prostheses, in particular to a pelvic prosthesis with bionic axial joint function.
Background
Pelvic tumor resection and functional reconstruction have become the mainstream methods of current pelvic tumor treatment, and current pelvic reconstruction mainly relies on sacroiliac joint and pubic symphysis fixation, wherein the sacroiliac joint fixation plays a major role (up to 60%). At present, the sacroiliac interface is mainly fixed by an auricular surface single interface, and the prosthesis is attached and connected with the sacral auricular surface through screws in the fixing mode. Since the sacral auricular surfaces are more vertical, the stresses experienced are primarily shear stresses, and greater shear stresses will increase the risk of complications such as sacroiliac interface loosening, screw breakage, sacral fracture, and the like. On the basis, the pelvic prosthesis can also enhance the stability of the sacroiliac interface by adding auxiliary fixing modes such as a nail-bar system, a sacral hook and the like. However, although the sacral hook can reduce the shear stress of the sacroiliac interface, the anatomical bionic design is not considered, the stability of auxiliary fixation by the hook is controversial, the auxiliary nail rod system with wider application can provide the stability of the sacroiliac interface, but the lumbar vertebra movement is limited, the pelvic mechanical conduction is changed, the operation incision is larger, the installation difficulty is higher, and the popularization and the application are difficult.
Therefore, there is a need to develop a pelvic prosthesis with an anatomically simulated design, capable of reconstructing the structure and function of the human sacroiliac interface, excellent in stability, and easy to install and apply.
The sacroiliac joint in the traditional sense refers to the joint formed by the sacral auricular surface, which is the hinge that conducts pelvic stress and maintains the stability of the pelvic girdle structure. In recent years, with the development of dissection, it has been found that on the dorsal aspect of the two lateral auricular surfaces, there is an "axial" joint, the sacroiliac axis joint, which is located outside the iliac process and sacral cavity of about 15 mm sacs on the dorsal aspect of the angle formed by the auricular surfaces of the sacroiliac joint, these bony structures are typically covered on one side with cartilage, the sacral cavity is occupied by fat-cell-rich areola tissue, and their interface is very tight, forming an extracapsular connection. As part of the sacroiliac joint, the sacroiliac axis joint plays a critical role in the nutating and anti-nutating rotation of the sacrum, playing an indispensable role in the biomechanical conduction and stability maintenance of the pelvis. However, current pelvic prosthesis designs do not adequately take into account the importance of reconstructing the axial joint structure and function, which limits to some extent the effectiveness of the prosthesis application and the postoperative recovery of the patient.
Therefore, from the bionics perspective, it is important to develop a pelvic prosthesis with a bionic axial joint function. The prosthesis can simulate the structure and the function of the sacroiliac joint in a natural state, and by reconstructing the key joint, the more stable fixation of the pelvic prosthesis and the mechanical conduction which is more similar to a physiological state are realized. The method is not only expected to solve the problems of the traditional fixing mode, but also can promote the further development of the pelvic tumor treatment technology, and brings safer and more effective treatment options for patients.
In summary, from the bionics perspective, the pelvic prosthesis with the function of the bionic axial joint is developed, the pelvic structure and the function are rebuilt, and the characteristics of stable sacroiliac interface, easiness in installation and popularization and the like are achieved.
Disclosure of Invention
Based on the defects of the current pelvis prosthesis, the invention provides a pelvis prosthesis with a bionic axis joint function, which has the anatomical structure of a bionic sacroiliac interface axial sacroiliac joint and the function of limiting the nutation and the reverse nutation of a human body, and the shear stress of a sacrum transverse nail is reduced, the integration area of the sacrum is increased, the stability of the prosthesis is improved, and the short-term stability and the long-term effectiveness of the prosthesis are finally realized through the fixation of the double interfaces of the sacrum axis joint surface and the auricular surface.
A pelvic prosthesis with bionic axial joint function, comprising a sacroiliac platform and an ilium complex;
The upper part of the sacroiliac platform is respectively provided with an axial joint surface and an auricular surface, the included angle of the plane where the axial joint surface and the auricular surface are positioned is 135 degrees+/-10 degrees, the lower part of the sacroiliac platform is provided with a sleeve connecting rod, and the sleeve connecting rod is provided with a plurality of connecting rod screw holes;
the upper end of the ilium complex is provided with a sleeve, and the side wall of the sleeve is provided with a plurality of sleeve screw holes;
The sleeve connecting rod of the sacroiliac platform is sleeved in the sleeve of the ilium complex in a penetrating way, and the size of the sleeve connecting rod is corresponding;
the connecting rod screw holes and the sleeve screw holes are the same in number and corresponding in position.
The shaft joint surface is provided with a plurality of shaft joint surface screw holes, the auricular surface is provided with a plurality of auricular surface screw holes, and the sacrum screw is screwed in the shaft joint surface screw holes and the auricular surface screw holes so that the shaft joint surface and the auricular surface are respectively connected with the sacrum of the human body.
The axial joint surface is in a half-moon shape according to the anatomical structure of the sacroiliac interface axial sacroiliac joint and the bionic design of human body for limiting the nutation and the reverse nutation of the sacrum, the height from the upper edge of the human sacroiliac joint surface to the upper edge of the sacrum is h, and the sacroiliac platform is divided into three types according to the difference of the h heights:
The first, h is more than 10mm, the height of the shaft joint surface is 23.0mm, the width is 22.0mm, the depth is 7.0mm, the second, 5mm < h is less than or equal to 10mm, the height of the shaft joint surface is 26.0mm, the width is 22.0mm, and the depth is 6.0mm;
Thirdly, h is less than or equal to 5mm, the height of the axial joint surface is 33.0mm, the width is 23.5mm, and the depth is 6.0mm.
The auricular surface is designed according to the pelvic ring reconstruction principle, and is provided with interface micropores, and the shape of the auricular surface is kidney-shaped.
The ilium complex is classified into three types according to tumor invasion sites:
The first type, aiming at the invasion of ilium parts, the ilium complex only has ilium parts, and is designed into an arc solid high-strength structure according to the mechanical characteristics of a pelvis ring, and the lower part of the ilium complex is fixed with the acetabular parts on the same side through screws;
The second type, for the invasion of ilium part and acetabulum part, the ilium complex comprises ilium part and acetabulum part, the ilium part is designed the same as the first type, the acetabulum part is a solid high-strength standard acetabulum prosthesis, the surface is provided with interface micropores, and the lower part of the ilium complex is fixed with ischial branch and pubic ramus at the same side through screws;
and thirdly, aiming at the invasion of ilium parts, acetabulum parts and ischium and pubis parts, wherein the ilium complex comprises ilium parts, acetabulum parts, ischium and pubis parts, the ilium parts and the acetabulum parts are the same as the second type, the ischium parts and the pubis parts are designed into streamline solid high-strength structures through topological optimization according to the integrality of pelvic rings and the biomechanical function of pelvis, and the lower part of the ilium complex is fixed with the contralateral pubis joint surface through screws.
The sacroiliac platform is fixed with the sacrum by the shaft joint surface and the auricular surface in a screwed mode.
The implantation direction of the sacrum screw adopts the design of bone density channels.
The sacroiliac platform and the ilium complex are made of Ti6Al.
The micropore structure is either a bcc structure or a body-centered cubic structure or a diamond structure or a Thiessen polygonal structure.
Working process and working principle:
The sacrum and the lateral hip bone form a rigid ring structure called the pelvic ring. The pelvis ring is divided into front and rear parts, the rear part is the gravitational line when the bearing main bow is in an upright position, and the sacroiliac joint to the hip bones at two sides are the sacrofemoral bows. Because of external force or erosion of tumor cells, the damage to the pelvic ring can be caused. According to the invention, through anatomical morphology measurement, the included angle relation between the axial joint surface and the auricular surface is clarified, the pelvic structure and function are rebuilt according to the anatomical structure of the sacroiliac joint axial sacroiliac joint and the bionic design of limiting the nutation and reverse nutation of the human body, and a sacroiliac platform is designed on the basis of the pelvic structure and function to enhance the stability of the sacroiliac interface.
The sacroiliac platform axial joint surface is fixed with the sacrum axial joint surface through screws, and the sacroiliac platform auricular surface is fixed with the sacrum auricular surface through screws. Three types of ilium complex are designed according to the defect part and degree of the pelvis of the patient, and the ilium complex and the sacroiliac platform are connected and fixed in a sleeve mode. The first type of ilium complex can replace ilium defect part and is designed into arc solid high-strength structure according to the mechanical characteristics of pelvic ring, the second type of ilium complex can replace bone defect part combining ilium and acetabulum, the ilium part is designed identically to the first type of ilium complex, the acetabulum part is a solid high-strength standard acetabulum prosthesis, interface micropores are arranged to promote bone ingrowth and enhance stability, the third type of ilium complex can replace bone defect part combining ilium, acetabulum, ischium and pubis, the ilium and the acetabular bone defect part is designed identically to the second type of complex, and the ischium and pubis defect part is designed into streamline solid high-strength structure through topological optimization according to the integrity of pelvic ring and the biomechanics characteristics of pelvis. The three kinds of complexes are firmly fixed with the underlying bone tissue through screws.
Bone mineral density (Bone MINERAL DENSITY, BMD) refers to the content of Bone mineral per unit of Bone tissue. The bone mineral density channel selected by the screw is the channel with the highest bone mineral content.
The invention has the beneficial effects that:
1. The invention has the anatomical structure of the bionic sacroiliac interface axial sacroiliac joint and the function of limiting the nutation and the reverse nutation of the human body, and through the fixation of the double interfaces of the sacrum axial joint surface and the auricular surface, the invention not only reduces the shearing stress of the sacrum transverse nail, but also increases the integration area of the sacrum, improves the stability of the prosthesis, and finally realizes the short-term stability and the long-term effectiveness of the prosthesis.
2. The invention provides an axial joint bionic design theory, and through anatomical morphology measurement, the included angle relation between an axial joint surface and an auricular surface is defined, the pelvis structure and function are rebuilt, the sacroiliac interface stability is enhanced, and a theoretical basis is provided for the design improvement of the pelvis prosthesis.
3. The invention provides three types of ilium complexes, which can meet the design requirements of prostheses of different types of patients through connection with a sacroiliac platform, and are easy to install and popularize.
4. The invention has perfect reconstruction theory and complete reconstruction flow, can rapidly and accurately finish pelvis reconstruction, improves operation efficiency, and accelerates postoperative rehabilitation of patients.
Drawings
FIG. 1 is a schematic view of the present invention in a position for articulation with an axle joint.
Fig. 2 is a schematic representation of the iliac complex of example 1 of the present invention.
Fig. 3 is an installation front view of embodiment 1 of the present invention.
Fig. 4 is an installation side view of embodiment 1 of the present invention.
Fig. 5 is a schematic representation of the iliac complex of example 2 of the present invention.
Fig. 6 is an installation front view of embodiment 2 of the present invention.
Fig. 7 is an installation side view of embodiment 2 of the present invention.
Fig. 8 is a schematic representation of the iliac complex of example 3 of the present invention.
Fig. 9 is an installation front view of embodiment 3 of the present invention.
Fig. 10 is an installation side view of embodiment 3 of the present invention.
Detailed Description
Example 1
Please refer to fig. 1, fig. 2, fig. 3 and fig. 4, which show embodiment 1 of the present invention.
A pelvis prosthesis with bionic axial joint function, comprising a sacroiliac platform 1 and an ilium complex 2;
the upper part of the sacroiliac platform 1 is respectively provided with an axial joint surface 11 and an auricular surface 12, the included angle between planes of the axial joint surface 11 and the auricular surface 12 is 135 degrees, the lower part of the sacroiliac platform is provided with a sleeve connecting rod 13, and the sleeve connecting rod 13 is provided with two connecting rod screw holes 14;
the upper end of the ilium complex 2 is provided with a sleeve 21, and the side wall of the sleeve 21 is provided with two sleeve screw holes 22;
the sleeve connecting rod 13 of the sacroiliac platform 1 is sleeved in the sleeve 21 of the ilium complex 2 in a corresponding size;
the number of the connecting rod screw holes 14 is the same as that of the sleeve screw holes 22, the positions are corresponding.
The shaft joint surface 11 is provided with two shaft joint surface screw holes 111, the auricular surface 12 is provided with two auricular surface screw holes 121, and the sacrum screw 3 is screwed in the shaft joint surface screw holes 111 and the auricular surface screw holes 121, so that the shaft joint surface 11 and the auricular surface 12 are respectively connected with the sacrum of a human body.
The shaft joint surface 11 is in a half-moon shape according to the anatomical structure of the sacroiliac joint in the axial direction of the sacroiliac interface and the bionic design of limiting the nutation and reverse nutation of the sacrum by a human body, the height h between the upper edge of the shaft joint surface of the human sacrum and the upper edge of the sacrum is 12mm, the height of the shaft joint surface is 23.0mm, the width is 22.0mm, and the depth is 7.0mm.
The auricular surface 12 is designed according to the pelvic ring reconstruction principle, and is provided with interface micropores with a body-centered cubic structure, and the shape of the auricular surface is kidney-shaped.
The tumor invasion part is an ilium part, the ilium complex 2 only has an ilium part, and is designed into an arc solid high-strength structure according to the mechanical characteristics of a pelvic ring, and the lower part of the ilium complex 2 is fixed with the acetabulum part on the same side through a screw;
The sacroiliac platform 1 is screwed and fixed with the sacrum through an axial joint surface 11 and an auricular surface 12.
The implantation direction of the sacrum screw 3 adopts the bone density channel design.
The sacroiliac platform 1 and the ilium complex 2 are made of Ti6Al.
Example 2
Please refer to fig. 1, 5, 6 and 7, which illustrate embodiment 2 of the present invention.
A pelvis prosthesis with bionic axial joint function, comprising a sacroiliac platform 1 and an ilium complex 2;
The upper part of the sacroiliac platform 1 is respectively provided with an axial joint surface 11 and an auricular surface 12, the included angle between the plane of the axial joint surface 11 and the plane of the auricular surface 12 is 140 degrees, the lower part of the sacroiliac platform is provided with a sleeve connecting rod 13, and the sleeve connecting rod 13 is provided with two connecting rod screw holes 14;
the upper end of the ilium complex 2 is provided with a sleeve 21, and the side wall of the sleeve 21 is provided with two sleeve screw holes 22;
the sleeve connecting rod 13 of the sacroiliac platform 1 is sleeved in the sleeve 21 of the ilium complex 2 in a corresponding size;
the number of the connecting rod screw holes 14 is the same as that of the sleeve screw holes 22, the positions are corresponding.
The shaft joint surface 11 is provided with two shaft joint surface screw holes 111, the auricular surface 12 is provided with two auricular surface screw holes 121, and the sacrum screw 3 is screwed in the shaft joint surface screw holes 111 and the auricular surface screw holes 121, so that the shaft joint surface 11 and the auricular surface 12 are respectively connected with the sacrum of a human body.
The shaft joint surface 11 is in a half-moon shape according to the anatomical structure of the sacroiliac joint in the axial direction of the sacroiliac interface and the bionic design of limiting the nutation and reverse nutation of the sacrum by a human body, the height h of the upper edge of the shaft joint surface of the human sacrum from the upper edge of the sacrum is 8mm, the height of the shaft joint surface is 26.0mm, the width is 22.0mm, and the depth is 6.0mm.
The auricular surface 12 is designed according to the pelvic ring reconstruction principle, and is provided with interface micropores with diamond structures, and the shape of the auricular surface is kidney-shaped.
The tumor invasion part is an ilium part and an acetabulum part, the ilium complex 2 comprises an ilium part and an acetabulum part, the ilium part has the same design as the first type in the invention, the acetabulum part is a solid high-strength standard acetabulum prosthesis, the surface is provided with interface micropores with a diamond structure, and the lower part of the ilium complex 2 is fixed with ischial branches and pubic ramus on the same side through screws;
The sacroiliac platform 1 is screwed and fixed with the sacrum through an axial joint surface 11 and an auricular surface 12.
The implantation direction of the sacrum screw 3 adopts the bone density channel design.
The sacroiliac platform 1 and the ilium complex 2 are made of Ti6Al.
Example 3
Referring to fig. 1, 8, 9 and 10, embodiment 3 of the present invention is shown.
A pelvis prosthesis with bionic axial joint function, comprising a sacroiliac platform 1 and an ilium complex 2;
The upper part of the sacroiliac platform 1 is respectively provided with an axial joint surface 11 and an auricular surface 12, the included angle between planes of the axial joint surface 11 and the auricular surface 12 is 130 degrees, the lower part of the sacroiliac platform is provided with a sleeve connecting rod 13, and the sleeve connecting rod 13 is provided with two connecting rod screw holes 14;
the upper end of the ilium complex 2 is provided with a sleeve 21, and the side wall of the sleeve 21 is provided with two sleeve screw holes 22;
the sleeve connecting rod 13 of the sacroiliac platform 1 is sleeved in the sleeve 21 of the ilium complex 2 in a corresponding size;
the number of the connecting rod screw holes 14 is the same as that of the sleeve screw holes 22, the positions are corresponding.
The shaft joint surface 11 is provided with two shaft joint surface screw holes 111, the auricular surface 12 is provided with two auricular surface screw holes 121, and the sacrum screw 3 is screwed in the shaft joint surface screw holes 111 and the auricular surface screw holes 121, so that the shaft joint surface 11 and the auricular surface 12 are respectively connected with the sacrum of a human body.
The shaft joint surface 11 is in a half-moon shape according to the anatomical structure of the sacroiliac joint in the axial direction of the sacroiliac interface and the bionic design of limiting the nutation and reverse nutation of the sacrum by a human body, the height h of the upper edge of the shaft joint surface of the human sacrum from the upper edge of the sacrum is 4mm, the height of the shaft joint surface is 33.0mm, the width is 23.5mm, and the depth is 6.0mm.
The auricular surface 12 is designed according to the pelvic ring reconstruction principle, and is provided with Thiessen polygonal structure interface micropores on the surface, and the shape of the auricular surface is kidney-shaped.
The tumor invasion part is ilium part, acetabulum part and ischium and pubis part, the ilium complex 2 comprises ilium part, acetabulum part and ischium and pubis part, the ilium part and the acetabulum part are the same as the second type of design in the invention, the ischium and pubis part are designed into streamline solid high-strength structure through topological optimization according to the pelvic ring integrity and the pelvic biomechanics function, and the lower part of the ilium complex 2 is fixed with the contralateral pubis joint surface through screws.
The sacroiliac platform 1 is screwed and fixed with the sacrum through an axial joint surface 11 and an auricular surface 12.
The implantation direction of the sacrum screw 3 adopts the bone density channel design.
The sacroiliac platform 1 and the ilium complex 2 are made of Ti6Al.
Claims (8)
1.A pelvis prosthesis with bionic axial joint function, which is characterized by comprising a sacroiliac platform (1) and an ilium complex (2);
The upper part of the sacroiliac platform (1) is respectively provided with an axial joint surface (11) and an auricular surface (12), the included angle between the plane of the axial joint surface (11) and the plane of the auricular surface (12) is 135 degrees+/-10 degrees, the lower part of the sacroiliac platform is provided with a sleeve connecting rod (13), and the sleeve connecting rod (13) is provided with a plurality of connecting rod screw holes (14);
The upper end of the ilium complex (2) is provided with a sleeve (21), and the side wall of the sleeve (21) is provided with a plurality of sleeve screw holes (22);
the sleeve connecting rod (13) of the sacroiliac platform (1) is sleeved in the sleeve (21) of the ilium complex (2) in a corresponding size;
The connecting rod screw holes (14) are the same as the sleeve screw holes (22) in number and corresponding in position;
The shaft joint surface (11) is in a half-moon shape according to the anatomical structure of the sacroiliac interface shaft sacroiliac joint and the bionic design of limiting the nutation and the reverse nutation of the human body, the height from the upper edge of the human sacroiliac joint surface to the upper edge of the sacrum is h, and the sacroiliac platform is divided into three types according to the difference of the h heights:
The first, h is more than 10mm, the height of the shaft joint surface is 23.0mm, the width is 22.0mm, the depth is 7.0mm, the second, 5mm < h is less than or equal to 10mm, the height of the shaft joint surface is 26.0mm, the width is 22.0mm, and the depth is 6.0mm;
Thirdly, h is less than or equal to 5mm, the height of the axial joint surface is 33.0mm, the width is 23.5mm, and the depth is 6.0mm.
2. The pelvis prosthesis with the bionic axial joint function according to claim 1 is characterized in that a plurality of axial joint surface screw holes (111) are formed in the axial joint surface (11), a plurality of ear surface screw holes (121) are formed in the ear surface (12), and the sacrum screw (3) is screwed in the axial joint surface screw holes (111) and the ear surface screw holes (121) so that the axial joint surface (11) and the ear surface (12) are respectively connected with the sacrum of a human body.
3. The pelvic prosthesis with bionic axial joint function according to claim 1, wherein the auricular surface (12) is designed according to the pelvic ring reconstruction principle, and is provided with interface micropores on the surface, and is kidney-shaped.
4. The pelvic prosthesis with bionic axial joint function according to claim 1, wherein the ilium complex (2) is divided into three categories according to tumor invasion sites:
The first type is that for ilium part invasion, the ilium complex (2) only has ilium part, and is designed into arc solid high-strength structure according to the mechanical characteristics of the pelvis ring, and the lower part of the ilium complex (2) is fixed with the acetabulum part at the same side through screws;
The second type, for ilium part and acetabulum part invasion, ilium complex (2) includes ilium part and acetabulum part, ilium part is the same design as above-mentioned first type, the acetabulum part is solid high-strength standard acetabulum prosthesis, there are interface micropores on the surface, the below of ilium complex (2) is fixed with ischial branch of homonymous bone and pubic bone through the screw;
The third category is aimed at the invasion of ilium part, acetabulum part and ischium and pubis part, wherein the ilium complex (2) comprises ilium part, acetabulum part, ischium part and pubis part, the ilium part and the acetabulum part are the same as the second category in design, ischium and pubis part are designed into streamline solid high-strength structure through topological optimization according to the integrality of pelvic ring and the biomechanical function of pelvis, and the lower part of the ilium complex (2) is fixed with the contralateral pubis joint surface through screws.
5. The pelvic prosthesis with bionic axial joint function according to claim 1, wherein the sacroiliac platform (1) is screwed and fixed with the sacrum through an axial joint surface (11) and an auricular surface (12).
6. A pelvic prosthesis with bionic axial joint function according to claim 2, characterized in that the direction of implantation of the sacral screw (3) is designed with bone density channels.
7. The pelvic prosthesis with bionic axial joint function according to claim 1, wherein the sacroiliac platform (1) and the ilium complex (2) are made of Ti6Al.
8. The pelvic prosthesis with bionic axial joint function according to claim 4, wherein the micropore structure is either a bcc structure or a body-centered cubic structure or a diamond structure or a Thiessen polygonal structure.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361601A (en) * | 2010-01-13 | 2012-02-22 | Jcbd公司 | Sacroiliac joint fixation fusion system |
| CN102579163A (en) * | 2012-03-08 | 2012-07-18 | 北京爱康宜诚医疗器材股份有限公司 | Sacral prosthesis |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7670383B1 (en) * | 2004-05-04 | 2010-03-02 | Biomet Manufacturing Corp. | Pubic catch |
| CN102202611B (en) * | 2008-10-21 | 2015-07-22 | Ww技术股份公司 | Fusion device and tool set for fusing a human or animal joint |
| CN204839709U (en) * | 2015-07-28 | 2015-12-09 | 王兆红 | Way E type internal fixing device before cacroiliac joint |
| CN114587715A (en) * | 2022-04-08 | 2022-06-07 | 吉林大学 | Assembled universal osseointegrated hemi-pelvic prosthesis |
| CN118526325A (en) * | 2024-05-23 | 2024-08-23 | 浙江大学 | Individualized ear-shaped surface fitting type half pelvis reconstruction prosthesis based on electric knife sacroiliac separation |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361601A (en) * | 2010-01-13 | 2012-02-22 | Jcbd公司 | Sacroiliac joint fixation fusion system |
| CN102579163A (en) * | 2012-03-08 | 2012-07-18 | 北京爱康宜诚医疗器材股份有限公司 | Sacral prosthesis |
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