CN114366395A - Sacrum pubis bilateral osseointegration hemi-pelvic prosthesis - Google Patents
Sacrum pubis bilateral osseointegration hemi-pelvic prosthesis Download PDFInfo
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- CN114366395A CN114366395A CN202210040755.9A CN202210040755A CN114366395A CN 114366395 A CN114366395 A CN 114366395A CN 202210040755 A CN202210040755 A CN 202210040755A CN 114366395 A CN114366395 A CN 114366395A
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- 210000003689 pubic bone Anatomy 0.000 title claims abstract description 87
- 238000010883 osseointegration Methods 0.000 title claims abstract description 15
- 230000002146 bilateral effect Effects 0.000 title claims abstract description 14
- 210000004872 soft tissue Anatomy 0.000 claims abstract description 23
- 210000000588 acetabulum Anatomy 0.000 claims abstract description 19
- 210000000988 bone and bone Anatomy 0.000 claims description 18
- 230000010354 integration Effects 0.000 claims description 15
- 210000004061 pubic symphysis Anatomy 0.000 claims description 13
- 210000001519 tissue Anatomy 0.000 claims description 3
- 229910052588 hydroxylapatite Inorganic materials 0.000 claims description 2
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 210000001696 pelvic girdle Anatomy 0.000 abstract description 6
- 238000004393 prognosis Methods 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 description 12
- 206010028980 Neoplasm Diseases 0.000 description 9
- 210000004197 pelvis Anatomy 0.000 description 8
- 210000003692 ilium Anatomy 0.000 description 5
- 238000002271 resection Methods 0.000 description 4
- 208000002193 Pain Diseases 0.000 description 3
- 206010061336 Pelvic neoplasm Diseases 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000007943 implant Substances 0.000 description 3
- 238000002513 implantation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000002779 inactivation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 208000018084 Bone neoplasm Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 208000008765 Sciatica Diseases 0.000 description 1
- 210000003489 abdominal muscle Anatomy 0.000 description 1
- 230000000735 allogeneic effect Effects 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 230000008468 bone growth Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000001981 hip bone Anatomy 0.000 description 1
- 235000015243 ice cream Nutrition 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 210000002239 ischium bone Anatomy 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000036210 malignancy Effects 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
Classifications
-
- 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
- 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
-
- 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
- A61F2/34—Acetabular cups
-
- 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
- A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
- A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
-
- 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
- A61F2002/30784—Plurality of holes
Abstract
The invention relates to a sacrum pubis bilateral osseointegration hemipelvic prosthesis, which comprises a sacrum lateral component, a pubis lateral component and an acetabulum component for connecting the sacrum lateral component and the pubis lateral component, wherein the sacrum lateral component, the pubis lateral component and the acetabulum component are of an integrated structure; a pubis screw hole, a sacrum transverse screw hole and a sacrum back screw hole are respectively arranged on the pubis joint surface, the cross section of the sacrum auricular surface and the sacrum back surface, a pubis screw is implanted into the opposite side pubis through the pubis screw hole, a sacrum transverse locking micropore screw is implanted into the sacrum transversely through the sacrum transverse screw hole in the first sacrum vertebral body and the second sacrum vertebral body, and the sacrum back screw is implanted into the sacrum from the back side to the ventral side above the sacral ala, the first sacrum hole and the second sacrum hole horizontally through the sacrum back screw hole; the sacrum side component and the pubis side component are both provided with a plurality of soft tissue attachment points. The invention utilizes the pubis lateral component to form pubis combination to form a complete pelvic ring structure, can effectively resist shear stress, and has good stability and prognosis of patients.
Description
Technical Field
The invention relates to the technical field of artificial hemi-pelvic prostheses, in particular to a sacrum pubis bilateral osseointegration hemi-pelvic prosthesis.
Background
The pelvis is a position where bone tumors easily occur, and reconstruction of the pelvis function after resection of the pelvic tumor is a great challenge for the bone oncologist due to the complex anatomical structure of the pelvis. At present, the typing of tumor resection and reconstruction of pelvic tumors is mainly Enneking typing, and is divided into: type I: cutting off the ilium; type II: cutting the periphery of the acetabulum; type III: cutting ischia and pubis; and IV, type: the scope of resection involves the sacrum. For the Enneking I + II + III area pelvic malignancies. The task of reconstructing the semi-pelvic prosthesis is particularly difficult due to a series of problems such as an excessively large resection range, a difficult fixing mode and difficult acetabulum reconstruction position.
At present, the methods mainly adopted for pelvic reconstruction include artificial prosthesis reconstruction, joint fusion, reconstruction of allogeneic bone, inactivation and replantation of autologous tumor bone and the like. Among them, techniques such as joint fusion, allograft bone reconstruction, autologous tumor bone inactivation and replantation are often eliminated due to factors such as high infection rate, limitation of bone source, high tumor recurrence risk, etc. At present, the reconstruction of the artificial semi-pelvic prosthesis gradually occupies the dominant position of the treatment of the malignant pelvic tumor due to the factors of good initial stability, easy acceptance of the appearance, relatively quick functional recovery and the like. To date, the clinically common prostheses are mainly: saddle-shaped prostheses, ice cream cone prostheses, built-up prostheses, and customized prostheses. At present, the prosthesis on the market is mainly a pure acetabular prosthesis, and a pubic symphysis part is not added. However, the pubic symphysis can resist shear forces and the pubic symphysis, as part of the anterior pelvic ring (consisting of the sacrum and the two lateral hip bones, each consisting of the ilium, ischium and pubis), plays an important role in maintaining the stability of the pelvic ring. Therefore, the prosthesis without pubic symphysis may have insufficient shear resistance, and the screws are often loosened and even pulled out by the load from different directions during daily activities, which finally results in the failure of the prosthesis. Moreover, prostheses in the market are often fixed only by screws, and the fixing structure only has a function of mechanical fixation, cannot realize bone ingrowth and further cannot realize long-term fixation of the metal prostheses and human bones.
Disclosure of Invention
Aiming at the defects that the pelvis prosthesis in the prior art does not consider a complete pelvis ring structure and biological fixation of pubis and can not realize long-term fixation through osseointegration, and simultaneously, in order to ensure wide excision of a tumor range and increase the postoperative long-term stability of the prosthesis, the invention provides a sacrum and pubic bone integration hemi-pelvis prosthesis with higher stability and composite biomechanical design.
In order to achieve the purpose, the invention adopts the following technical scheme:
a sacrum pubis bilateral integration hemipelvic prosthesis comprises a sacrum lateral component, a pubis lateral component and an acetabulum component connecting the sacrum lateral component and the pubis lateral component, wherein the sacrum lateral component, the pubis lateral component and the acetabulum component are of an integrated structure, and a first prosthesis surface at the joint of the sacrum lateral component and a sacrum and a second prosthesis surface at the joint of the pubis lateral component and a healthy lateral pubis are microporous surfaces;
a pubis screw hole, a sacrum transverse screw hole and a sacrum back screw hole are respectively arranged on the pubis joint surface, the cross section of the sacrum auricular surface and the sacrum back surface, a pubis screw is implanted into the opposite side pubis through the pubis screw hole, a sacrum transverse locking micropore screw is implanted into the sacrum transversely through the sacrum transverse screw hole on the first sacrum vertebral body and the second sacrum vertebral body, the surface of the sacrum transverse locking micropore screw is provided with a micropore for forming bone integration with the sacrum, and the sacrum back screw is implanted into the sacrum from the back side to the ventral side above the sacrum pterus, and the first sacrum hole and the second sacrum hole are horizontally implanted into the sacrum from the back side through the sacrum back screw hole;
the sacrum side component and the pubis side component are both provided with a plurality of soft tissue attachment points.
Compared with the prior art, the invention has the following beneficial effects:
(1) the semi-pelvic prosthesis provided by the invention utilizes the pubic bone side assembly to form pubic bone combination, and can form osseointegration on both sides of the sacral pubic bone, so that a complete pelvic ring structure is formed, the shear stress can be effectively resisted, the stability and the prognosis of a patient are good, the complications and the tumor recurrence risk are effectively reduced, and the pain and the economic burden of the patient are greatly reduced;
(2) the sacrum side component, the pubis side component and the acetabulum component in the semi-pelvic prosthesis are designed into an integrated structure, micro motion generated among the prosthesis components in the later period of implantation can be avoided, the stability of the prosthesis is ensured, and meanwhile, the pubis combination and the ilium version are applied for double biological fixation, so that the biomechanical stability and the long-term stability are good;
(3) in the semi-pelvic prosthesis provided by the invention, the first prosthesis surface at the joint of the sacrum side assembly and the sacrum and the second prosthesis surface at the joint of the pubis side assembly and the healthy lateral pubis are microporous surfaces, micropores for forming bone integration with the sacrum are arranged on the surface of the sacrum transverse locking microporous screw, and a plurality of soft tissue attachment points are arranged on the sacrum side assembly and the pubis side assembly, which are beneficial to the bone integration of the prosthesis, so that the long-term stable fixation of the prosthesis is realized.
Drawings
Fig. 1 is a perspective schematic view of a sacral pubic symphysis hemi-pelvic prosthesis according to the present invention;
fig. 2 is a left side view of the sacral pubic symphysis hemi-pelvic prosthesis shown in fig. 1;
fig. 3 is a schematic view of the butt-joint installation of the sacral pubic symphysis hemi-pelvic prosthesis of the present invention to the pelvis of a patient;
fig. 4 is a view of the use of the sacral pubic symphysis hemi-pelvic prosthesis of the present invention;
description of reference numerals:
1. a sacral lateral component; 2. a pubic lateral component; 3. an acetabular component; 4. a first prosthetic face; 5. a second prosthetic face; 6. a pubic screw hole; 7. a sacral transverse screw hole; 8. a sacral posterior screw hole; 9. a pubic screw; 10. sacral transverse locking microporous screws; 11. a sacral dorsal screw; 12. soft tissue attachment points.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.
The invention provides a sacrum pubis bilateral bone integration hemi-pelvic prosthesis, which is a prosthesis implanted in a patient on the basis of cutting part of affected sacrum, all ilium and pubis of the patient, figures 1 and 2 are perspective structural schematic diagrams of the sacrum pubis bilateral bone integration hemi-pelvic prosthesis, and figure 3 is a schematic diagram of butt joint installation of the sacrum pubis bilateral bone integration hemi-pelvic prosthesis and the pelvis of the patient. As shown in fig. 1-3, the sacrum pubis bilateral integration hemipelvic prosthesis comprises a sacrum lateral component 1, a pubis lateral component 2 and an acetabulum component 3, wherein the acetabulum component 3 connects the sacrum lateral component 1 and the pubis lateral component 2 together, and the sacrum lateral component 1, the pubis lateral component 2 and the acetabulum component 3 are designed into an integrated structure, so that micro-motion generated among prosthesis components in the late stage of implantation is avoided, and the stability of the prosthesis is ensured. The acetabular component 3 is intended to be connected to a femoral side prosthesis. In addition, the hemipelvic prosthesis comprises a pubic screw 9, a sacral transverse locking microporous screw 10 and a sacral dorsal screw 11; soft tissue attachment points 12 are correspondingly designed on the semi-pelvic prosthesis to connect the muscles and soft tissue around the pelvis to provide a stable muscle environment for the prosthesis.
Specifically, the sacrum side component 1 extends towards the back side part, and a first prosthesis surface at the joint of the sacrum side component 1 and the sacrum is designed to meet the micropore surface for bone growth, so that the sacrum side bone integration of the prosthesis is realized, the long-term sacrum fixation purpose is achieved, and the long-term stability of the prosthesis is realized; pubis lateral component 2 also faces and is good with healthy side pubis, and the second prosthesis face that pubis lateral component 2 and healthy side pubis meet the department simultaneously also designs into the micropore surface that satisfies the bone condition of growing into, realizes the integration of false body pubis lateral to reach the fixed purpose of long-term pubis, realize the long-term stability of false body, and form complete pubis ring structure, with the shearing stress of resisting. Preferably, the first prosthesis face and the second prosthesis face are coated with hydroxyapatite with a pore diameter of 70 nm.
A pubis screw hole 6, a sacrum transverse screw hole 7 and a sacrum dorsal screw hole 8 are respectively arranged on the pubis combination surface, the cross section of the sacrum auricular surface and the sacrum dorsal surface. It is noted that as shown in fig. 1-4, the pubic screw hole 6, the sacral transverse screw hole 7, and the sacral dorsal screw hole 8 all extend through the prosthesis.
The pubis screw 9 implants the contralateral pubis through the pubis screw hole 6, and the pubis screw 9 divide into upper and lower two screws, implants the contralateral pubis respectively and goes up, down to obtain stable mechanical fastening. Through the earlier stage mechanical fastening of pubic screw 9, human pubic symphysis is united in the simulation, and the guarantee prosthesis is stable.
The sacrum transverse locking microporous screw 10 and the sacrum dorsal screw 11 are implanted in an interpenetration manner, the sacrum transverse locking microporous screw 10 is implanted in the sacrum transversely in the first sacrum vertebral body and the second sacrum vertebral body through the sacrum transverse screw hole 7, and the surface of the sacrum transverse locking microporous screw 10 is provided with a microporous structure, and the microporous surface of the microporous structure can form good osseointegration with the sacrum. The sacrum transverse locking micro-hole screw 10 is designed to realize early stabilization of the sacrum screw through locking design, effectively avoid the nerve structures of the sacral canal and the sacral foramen according to preoperative design of the locking screw, ensure the safety of the operation, realize osseointegration according to the micro-hole design of the screw, and finally realize long-term fixation of the screw.
The sacral dorsal screw 11 is implanted into the sacrum from the dorsal side to the ventral side through the sacral dorsal screw hole 8 above the sacral ala, at the level of the first sacral foramen and the second sacral foramen, and the sacral transverse locking micro-hole screw 10 and the sacral dorsal screw 11 are implanted into the sacrum with the sacral transverse locking micro-hole screw 10 and the sacral dorsal screw 11 interdigitating with each other in the position on the sacrum, but without communication between the sacral transverse screw hole 7 and the sacral dorsal screw hole 8. The application of the sacral dorsal screws 11 can relieve the stress load of the sacral transverse locking microporous screws 10 to reduce the risk of fracture of the prosthetic screws and ensure the stability of the prosthesis.
Further, the ratio of the number of pubic screws 9, sacral transverse locking micro-hole screws 10 and sacral dorsal screws 11 is 2:2: 3.
Preferably, the pubic screw 9, the sacral transverse locking micro-hole screw 10 and the sacral dorsal screw 11 are all pedicle screws
The sacrum side component 1 and the pubis side component 2 are respectively provided with a plurality of soft tissue attachment points 12, and the soft tissue attachment points 12 are used for connecting the semi-pelvic prosthesis with soft tissues at corresponding positions. The soft tissue attachment points 12 are fixing holes which are formed by repairing edges of abdominal muscles and gluteus muscles above the prosthesis, are in the shape of a curved cylinder, have the diameter of about 1.5mm, can accommodate the thickness of a needle, have the hole spacing of 1-1.5 cm, and are rough surfaces of the prosthesis around the holes, so that the connection with the soft tissue is better realized. The number of the soft tissue attachment points 12 can be designed according to actual needs, for example, 6 soft tissue attachment points 12 are arranged on the sacrum side component 1, 7 soft tissue attachment points 12 are arranged on the pubis side component 2, and each soft tissue attachment point 12 is connected with the tissue at the corresponding position through a patch.
The position of the acetabular component 3 on the semi-pelvic prosthesis is determined from the sound side acetabulum, and in particular, the position of the acetabular component 3 on the semi-pelvic prosthesis can be determined by:
the method comprises the following steps: determining the position of the affected acetabulum in a mirror symmetry mode according to the healthy side acetabulum;
step two: the position of the acetabular component 3 on the hemi-pelvic prosthesis is determined according to the affected side acetabular position in combination with the length of the sacral side component 1 and the pubic side component 2.
The use of the sacral pubic symphysis hemipelvic prosthesis of the invention is illustrated in fig. 4. The utility model provides a half pelvic prosthesis of sacrum pubic bilateral integration, includes sacrum side subassembly 1, pubic side subassembly 2 and connects acetabular bone subassembly 3 of the two, and sacrum side subassembly 1 is implanted the sacrum by sacrum auricular face and sacrum back respectively through 2 sacrum horizontal locking micropore screws 10 and 3 sacrum dorsal part screws 11, with sacrum fixed connection, and pubic side subassembly 2 is through 2 pubic screws 9 and healthy side pubic fixed connection. The surface of the sacral transverse locking microporous screw 10 contains micropores suitable for osseointegration, which can form good biological fixation with the sacral vertebral body. The pubic side assembly 2 comprises 7 soft tissue attachment points 12, the sacral side assembly 1 comprises 6 soft tissue attachment points 12, and all the soft tissue attachment points 12 are respectively connected with tissues at specific positions through patches. The surface microporous structure at the contact surface of the sacral side member 1 with the sacrum and at the contact surface of the pubic side member 2 with the sound side pubic bone may enhance osseointegration at the bone-implant connection. To sum up, the sacrum side component 1, the pubis side component 2 and the acetabulum component 3 form a complete and stable pelvic ring structure, so that the stability of the semi-pelvic prosthesis is improved, the complications and the tumor recurrence risk are effectively reduced, the pain and the economic burden of a patient are greatly reduced, and the clinical requirement can be met.
The sacrum pubis bilateral osseointegration hemipelvic prosthesis provided by the invention has the following beneficial effects:
(1) the pubis combination is formed by utilizing the pubis side assembly, and osseointegration can be formed on both sides of the sacrum pubis, so that a complete pelvic ring structure is formed, the shear stress can be effectively resisted, the stability and the prognosis of a patient are good, the complications and the tumor recurrence risk are effectively reduced, and the pain and the economic burden of the patient are greatly reduced;
(2) the sacrum side component, the pubis side component and the acetabulum component are designed into an integrated structure, micro motion generated among the prosthesis components in the later period of implantation can be avoided, the stability of the prosthesis is ensured, and meanwhile, the pubis combination and the ilium version are applied for double biological fixation, so that the biomechanical stability and the long-term stability are good;
(3) the first false body face that sacrum side subassembly and sacrum meet the department and the second false body face that pubis side subassembly and healthy side pubis meet the department are the micropore surface, the surface of sacrum horizontal locking micropore screw is equipped with the micropore that is used for constituting the osseointegration with the sacrum, all be equipped with a plurality of soft tissue attachment point on sacrum side subassembly and the pubis side subassembly, these designs all are favorable to the osseointegration of false body, thereby realize that the long-term stability of false body is fixed.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. The sacrum pubis bilateral integration hemi-pelvic prosthesis is characterized by comprising a sacrum lateral component (1), a pubis lateral component (2) and an acetabulum component (3) connecting the sacrum lateral component and the pubis lateral component, wherein the sacrum lateral component (1), the pubis lateral component (2) and the acetabulum component (3) are of an integrated structure, and a first prosthesis surface (4) at the joint of the sacrum lateral component (1) and a second prosthesis surface (5) at the joint of the pubis lateral component (2) and the healthy lateral pubis are microporous surfaces;
a pubis screw hole (6), a sacrum transverse screw hole (7) and a sacrum back screw hole (8) are respectively arranged on the pubis joint surface, the sacrum auricular surface section and the sacrum back surface, a pubis screw (9) is implanted into the contralateral pubis through the pubis screw hole (6), a sacrum transverse locking microporous screw (10) is transversely implanted into the sacrum through the sacrum transverse screw hole (7) in a first sacrum vertebral body and a second sacrum vertebral body, a micropore for forming bone integration with the sacrum is arranged on the surface of the sacrum transverse locking microporous screw (10), and a sacrum back screw (11) is implanted into the sacrum from the back side to the ventral side through the sacrum back screw hole (8) above the sacrum ala, at the level of the first sacrum hole and the second sacrum hole;
the sacrum side component (1) and the pubis side component (2) are both provided with a plurality of soft tissue attachment points (12).
2. The sacral pubic bilateral integration hemi-pelvic prosthesis of claim 1, wherein the number ratio of the pubic screws (9), the sacral lateral locking micro-porous screws (10), and the sacral dorsal screws (11) is 2:2:3, and the sacral lateral locking micro-porous screws (10) and the sacral dorsal screws (11) are interspersed with each other, and the pubic screws (9) comprise upper and lower screws implanted in upper and lower branches of the contralateral pubic bone, respectively.
3. The sacral pubic symphysis hemipelvic prosthesis of claim 1 or 2, wherein the pubic screw (9), the sacral transverse locking micro-hole screw (10) and the sacral dorsal screw (11) are pedicle screws.
4. The sacral pubic bilateral osseointegration hemi-pelvic prosthesis according to claim 1 or 2, characterized in that there are 6 soft tissue attachment points (8) on the sacral side assembly (1), 7 soft tissue attachment points (8) on the pubic side assembly (2), each soft tissue attachment point (8) being connected to the tissue at the corresponding location by a patch.
5. The sacral pubic symphysis hemipelvic prosthesis of claim 1 or 2, wherein the position of the acetabular component (3) on the hemipelvic prosthesis is determined by:
determining the position of the affected acetabulum in a mirror symmetry mode according to the healthy side acetabulum;
determining the position of the acetabular component (3) on the hemi-pelvic prosthesis according to the affected side acetabular position in combination with the length of the sacral side component (1) and the pubic side component (2).
6. The sacral pubic symphysis hemi-pelvic prosthesis according to claim 1 or 2, wherein the first prosthesis face (4) and the second prosthesis face (5) are each coated with hydroxyapatite having a pore diameter of 70 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114886618A (en) * | 2022-04-26 | 2022-08-12 | 吉林大学 | Bionic acetabulum reconstruction prosthesis for ilium inner plate osseointegration based on 3D printing |
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| CN114886618A (en) * | 2022-04-26 | 2022-08-12 | 吉林大学 | Bionic acetabulum reconstruction prosthesis for ilium inner plate osseointegration based on 3D printing |
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