CN117084830B - A true pelvic orifice bionic prosthesis - Google Patents

Abstract

A true pelvis bionic assembled prosthesis belongs to the technical field of medical appliances and consists of a femoral sacral arch assembled component, an acetabulum component and a connecting arch assembled component; the femoral-sacral arch assembly component connecting rod is sleeved in an acetabular component sleeve, a fixed bone plate is externally lined, and the femoral-sacral arch assembly component, the acetabular component and the fixed bone plate are fixed together through screws; the connecting rod of the connecting bow assembly component is sleeved in the sleeve of the other acetabulum component, the fixed bone plate is externally lined, and the acetabulum component, the connecting bow assembly component and the fixed bone plate are fixed together through screws; the invention is a universal assembled prosthesis, ensures accurate positioning and orientation of acetabulum by adjusting the femoral-sacral arch assembling component and the connecting arch assembling component, remarkably reduces manufacturing cost, improves rehabilitation effect and life quality of patients and reduces economic burden of the patients while meeting different requirements in semi-pelvic reconstruction operation.

Description

A true pelvic orifice bionic prosthesis

Technical field

The invention belongs to the technical field of medical devices, and particularly relates to a true pelvic orifice bionic prosthesis based on pelvic anatomy, morphology and mechanics.

Background technique

The pelvis is a common site for bone tumors. Due to its deep location and complex surrounding structures, pelvic tumors usually have an insidious onset. The tumors are often large in size at the time of diagnosis, and most of the pelvic organs, blood vessels and nerves are involved. Surgery to remove the tumor and resection are Postoperative reconstruction brings great difficulties, and its treatment is a challenging clinical problem worldwide. The main treatment method for pelvic tumors is tumor resection and reconstruction. When pelvic tumors simultaneously invade the ilium, acetabulum, and pubic areas, hemipelvic resection and reconstruction are required. Currently, the prosthesis for reconstructing the hemipelvis is divided into modular hemipelvic prosthesis and integrated hemipelvic prosthesis. Modular hemipelvic prosthesis is a non-anatomical bionic design. The reconstructed acetabulum cannot achieve anatomical positioning and orientation. The center of rotation of the hip joint changes, and complications such as hip dislocation and limb length inequality are prone to occur. In addition, most modular hemipelvic prostheses have no pubic bone components, so the pelvic ring is incomplete, which can easily cause mechanical failure of the prosthesis. Most of the integrated hemipelvic prostheses are individually customized with 3D printing. By mirroring the opposite pelvis, the anatomy and mechanical bionics of the hemipelvic prosthesis are realized. However, this type of prosthesis has a long design and manufacturing cycle, high cost, and difficulty in popularization and application.

Therefore, there is an urgent need to develop a universal modular hemipelvic prosthesis with anatomical and mechanical bionic design, low cost, and easy to be widely used.

The bionic design of the hemipelvic prosthesis needs to consider two factors: the mechanical transmission of the pelvis and the positioning and orientation of the acetabulum.

First of all, the mechanical transmission of the pelvis mainly considers the mechanical transmission under the load-bearing state of the hip joint, that is, the femoral sacral arch and the connecting arch. The femoral sacral arch is the mechanical transmission area from the acetabulum through the ilium to the sacrum, and the connecting arch is the area from the acetabulum through the pubic bone to the sacrum. Mechanically dispersed area of the pubic symphysis. They correspond to the pelvic ring consisting of the sacrum, the sacroiliac joints and their ligaments, the arcuate line, the pubic comb, the pubic bone, and the symphysis pubis. The complete pelvic ring structure is the basis for the mechanical transmission of the hemipelvic prosthesis and the basic element of the bionic design of the hemipelvic prosthesis.

Secondly, the positioning of the acetabulum, that is, its position in three-dimensional space (x, y, and z axes), has anatomical rules to follow. Measurement and analysis of anatomical big data through the true pelvic orifice (composed of the sacrum, the upper edge of the sacroiliac joints, the arcuate line of the ilium, the upper edge of the acetabulum, the pubic comb and the upper edge of the pubic symphysis, forming the entrance to the true pelvis), summary "True pelvic orifice bionic design theory" for the anatomical positioning of the acetabulum: ① The true pelvic orifice is generally located on a plane. Therefore, the height of the acetabulum can be determined through the upper edge of the sacroiliac joint and the upper edge of the pubic symphysis of the true pelvic orifice (z axis), that is to say, the upper edge of the acetabulum of the hemipelvic prosthesis, the upper edge of the sacroiliac joint connecting component and the upper edge of the pubic symphysis connecting component are on the same plane; ② The width of the sacrum and the distance between the acetabulum are basically equal, and the width of the true pelvic mouth is The width of the sacrum determines the lateral position (x-axis) of the acetabulum of the hemipelvic prosthesis, that is, the inner edge of the acetabulum of the hemipelvic prosthesis is parallel to the auricular surface of the sacroiliac joint component; ③ The length of the true pelvic orifice varies from person to person. But there is a constant relationship between the sacroiliac joint-acetabulum-pubic symphysis. The angle is within the range of 100±5°. This means that the longitudinal position (y-axis) of the acetabulum in the hemipelvic prosthesis can be adjusted by changing the length of the femoro-sacral arch line (femoral-sacral arch assembly). Once it is consistent with the longitudinal position of the contralateral acetabulum, as long as the design An angle of 100° can mirror the opposite half of the true pelvic orifice. By adjusting the length and rotation of the connecting arch assembly of the hemipelvic prosthesis and the femoral and sacral arch assembly, the pubic symphysis is docked, thereby restoring the true pelvis. The length of the mouth and the integrity of the pelvic ring. It can be seen that according to the true pelvic orifice bionic design theory, the z-axis and x-axis of the acetabulum positioning are consistent for each individual when designing the prosthesis, and the y-axis is inconsistent for each individual. However, it can be adjusted through the assembly components, that is, the anatomical bionic positioning of the prosthetic acetabulum can be achieved for each individual through the assembly components.

Third, the orientation of the acetabulum. Most scholars believe that the placement of the acetabular component in abduction of 45° and anteversion of 15° is more consistent with the anatomical structure. Due to the adjustment of the femorosacral arch assembly and connecting arch assembly in the process of restoring the true pelvic orifice length and pubic symphysis docking (the rotation fine-tuning range is ±5°, the impact on the acetabular orientation is within ±5°), so , orient the acetabular component to 40° of abduction and 15° of anteversion.

The human sacrum has a wedge-shaped structure that is wide at the top and narrow at the bottom. The shape of the auricular surface of the sacroiliac joint can be mainly divided into "C" type and "L" type, thereby determining the oblique structure of the prosthetic sacroiliac interface with a wide top and narrow bottom; human body The pubic symphysis interface is perpendicular to the ground, thereby determining the vertical structure of the prosthetic pubic symphysis interface.

In summary, a true pelvic orifice bionic prosthesis has been invented, which has the characteristics of anatomical and mechanical bionic design, low cost, universal, and easy to popularize and promote.

Contents of the invention

The invention provides a true pelvic orifice bionic prosthesis to solve the shortcomings of current hemipelvic prosthesis. This invention is based on the "true pelvic orifice bionic design theory" and provides a bionic design that conforms to human anatomy, morphology and biomechanical characteristics for hemipelvic reconstruction surgery. It can effectively reproduce the pelvic shape, improve the mechanical stability of the prosthesis, and reduce the risk of prosthesis failure. Universal modular hemipelvic prosthesis.

A true pelvic orifice bionic prosthesis, consisting of a femoral and sacral arch assembly, an acetabulum assembly, and a connecting arch assembly;

The femoral and sacral arch assembly assembly includes a femoral and sacral arch assembly assembly main body and a femoral and sacral arch assembly assembly connecting rod. The femoral and sacral arch assembly assembly connecting rod is arranged at the lower end of the femoral and sacral arch assembly assembly body. A sacral post screw hole is provided on the auricular surface of the main body of the arch assembly assembly, and several screw holes for the femoral and sacral arch assembly assembly are provided on the main body of the arch assembly assembly and the connecting rod of the assembly assembly of femoral and sacral arch assembly;

The acetabular component includes an acetabular component main body and two acetabular component sleeves. The acetabular component main body is hemispherical. The two acetabular component sleeves are arranged on both sides of the acetabular component main body. Each acetabular component A socket is provided inside the component sleeve, and several acetabular component screw holes are provided on the walls of the two acetabular component sleeves;

The described coupling bow assembly assembly includes a coupling bow assembly assembly main body and a coupling bow assembly assembly connecting rod. The coupling bow assembly assembly connecting rod is arranged at one end of the coupling bow assembly assembly body. The coupling bow assembly assembly body and The connecting rod of the coupling arch assembly assembly is provided with several screw holes for the coupling arch assembly assembly, and the other end of the main body of the coupling arch assembly assembly is provided with several nail holes for pubic bone fixation screws;

The connecting rod of the femoral and sacral arch assembly assembly is inserted into an acetabular assembly sleeve, and is lined with a fixed bone plate. The femoral and sacral arch assembly assembly, acetabular assembly and fixed bone plate are fixed together through screws. ;

The connecting rod of the connecting arch assembly is inserted into the sleeve of another acetabular assembly and lined with a fixed bone plate. The acetabular assembly, the connecting arch assembly and the fixed bone plate are fixed together through screws.

A cushion block is provided between the femoral and sacral arch assembly components and the acetabular component.

A cushion block is provided between the acetabular component and the connecting arch assembly.

The thickness of the pad is 10-30 mm.

The upper edges of the femoro-sacral arch assembly, the acetabulum assembly and the connecting arch assembly are all located on the true pelvic orifice plane.

The angle between the femoral and sacral arch assembly and the connecting arch assembly and the connecting arch line where the femoral and sacral arch assembly components are located is within the range of (100±5)°;

The orientation of the acetabular component is 40° abduction and 15° anteversion.

The auricular surface of the femoral and sacral arch assembly is "C" shaped or "L" shaped.

The length of the connecting rod of the femoral and sacral arch assembly is 20-40mm.

The length of the connecting rod of the coupling bow assembly assembly is 20-40mm.

The internal depth of the acetabular component sleeve is 20-30mm.

Working principle of the invention:

The upper edges of the femoral and sacral arch assembly components, the upper edges of the acetabular component and the upper edges of the connecting arch assembly components of the present invention are all located on the true pelvic orifice plane; the acetabular component can be clearly defined through the upper edge of the sacroiliac joint and the upper edge of the pubic symphysis. The upper edge of the acetabulum determines the height of the acetabulum (z-axis); the plane of the femoral and sacral arch assembly component 1 is parallel to the inner edge of the acetabular component, and the lateral position of the acetabular component (x-axis) can be determined by the width of the sacrum.

The angle between the femoral and sacral arch assembly and the connecting arch assembly and the connecting arch line where the femoral and sacral arch assembly is located is relatively fixed within the range of 100±5°; it can be changed by changing the femoral and sacral arch assembly. The length on the femorosacral arch line adjusts the longitudinal position (y-axis) of the acetabular component; the docking of the pubic symphysis is achieved by adjusting the length and rotation of the connecting arch component of the hemipelvic prosthesis and the femorosacral arch component. Restore the length of the true pelvic orifice and the integrity of the pelvic ring; by adjusting the length and width of the true pelvic orifice and the position of the acetabulum through the three components, the docking of the sacroiliac joint interface and the pubic symphysis interface can be achieved, and the anatomical position of the acetabulum can be restored.

The femorosacral arch assembly and connecting arch assembly can restore the true pelvic mouth length and pubic symphysis docking after adjustment (the rotation fine-tuning range is ±5°, and the impact on the acetabulum orientation is within ±5°), and the acetabulum The prosthesis is oriented at 40° abduction and 15° anteversion.

The femoral and sacral arch assembly is fixed to the auricular surface of the sacrum through sacral post screws. The connecting part is wider at the top and narrower at the bottom. The dorsal side is fixed to the back of the sacrum through a dorsal sacrum bone plate and screws. The dorsal sacrum bone plate and the prosthesis are connected to the prosthesis through connecting screws. Connection; the connecting arch assembly is fixed to the contralateral pubic symphysis through pubic fixation screws.

The length of the connecting rod of the femoral and sacral arch assembly is 20-40mm, the pubic symphysis interface of the connecting arch assembly is perpendicular to the ground, and the length of the connecting rod of the connecting arch assembly is 20-40mm, preferably 20-30mm.

Patients have different body shapes, and their needs for prostheses will also vary from person to person. At this time, the pads of different heights can be replaced to adapt to the different needs of the patient.

Beneficial effects of the present invention:

1. The bionic design of the present invention conforms to the anatomical morphology and biomechanical characteristics of the human body, can effectively reproduce the complete pelvic ring structure, and matches the biomechanical characteristics of the normal human pelvis, thus improving the mechanical stability of the prosthesis and reducing the risk of prosthesis failure.

2. The present invention proposes the "true pelvic orifice bionic design theory". Through anatomical morphological measurements, the relationship between parameters such as the true pelvic orifice plane, sacrum width, femorosacral arch line and connecting arch line and acetabulum positioning and orientation is clarified, which is Improvements in hemipelvic prosthesis design provide a theoretical basis to promote the development and progress of pelvic tumor resection and reconstruction.

3. The present invention is a universal modular prosthesis that ensures accurate positioning and orientation of the acetabulum by adjusting the femoral and sacral arch assembly components and the connecting arch assembly. It can meet different needs in hemipelvic reconstruction surgery while significantly reducing manufacturing costs. cost, improve patients' rehabilitation effects and quality of life, and reduce patients' financial burden.

4. The present invention has a complete reconstruction theory and a complete reconstruction process, can quickly and accurately complete hemipelvic reconstruction, improve surgical efficiency, and accelerate the patient's postoperative recovery.

Description of drawings

Figure 1 is a front view of the overall structure of the embodiment of the present invention.

Figure 2 is an enlarged view of the details of the femoral and sacral arch assembly according to the embodiment of the present invention.

Figure 3 is an enlarged view of details of the acetabular component according to the embodiment of the present invention.

Figure 4 is an enlarged view of details of the coupling bow assembly according to the embodiment of the present invention.

Figure 5 is a side view of the connection structure of the embodiment of the present invention.

Figure 6 is a schematic diagram of the femoral and sacral arch lines, connecting arch lines and spatial coordinate system according to the embodiment of the present invention.

Figure 7 is a rear view of the overall structure of the embodiment of the present invention.

Figure 8 is a front view of the "C"-shaped auricular surface of the femoral and sacral arch assembly according to the embodiment of the present invention.

Figure 9 is a front view of the "L" shaped auricular surface of the femoral and sacral arch assembly according to the embodiment of the present invention.

Detailed ways

Embodiment 1

Please refer to Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7 and Figure 9, which is a first embodiment of the present invention.

The embodiment described in this example is suitable for male patients.

A true pelvic orifice bionic prosthesis is composed of a femoral and sacral arch assembly component 1, an acetabular component 2, and a connecting arch assembly component 3.

The femoral and sacral arch assembly assembly 1 includes a femoral and sacral arch assembly assembly main body 11 and a femoral and sacral arch assembly assembly connecting rod 12. The length of the femoral and sacral arch assembly connecting rod 12 is 30mm; The assembly connecting rod 12 is provided at the lower end of the femoral and sacral arch assembly assembly body 11. The ear-shaped surface 13 of the femoral and sacral arch assembly assembly body 11 is provided with sacral post screw holes 14. The femoral and sacral arch assembly assembly body 11 Three femoral and sacral arch assembly assembly screw holes 15 are provided on the connecting rod 12 of the femoral and sacral arch assembly components; the ear-shaped surface 13 is "L" shaped.

The acetabular component 2 includes an acetabular component main body 21 and two acetabular component sleeves 22. The acetabular component main body 21 is hemispherical, and the two acetabular component sleeves 22 are arranged on both sides of the acetabular component main body 21. On the other side, each acetabular component sleeve 22 is provided with a socket 23 inside, and two acetabular component screw holes 24 are provided on the walls of the two acetabular component sleeves 22.

The described coupling bow assembly assembly 3 includes a coupling bow assembly assembly main body 31 and a coupling bow assembly assembly connecting rod 32. The length of the coupling bow assembly assembly connecting rod 32 is 30 mm; the coupling bow assembly assembly connecting rod 32 is arranged on One end of the coupling bow assembly assembly main body 31 is provided with three coupling bow assembly assembly screw holes 33 on the coupling bow assembly assembly main body 31 and the coupling bow assembly assembly connecting rod 32. The other end of the coupling bow assembly assembly main body 31 is provided with three coupling bow assembly assembly screw holes 33. There are two holes 34 for pubic fixation screws.

The femoral and sacral arch assembly assembly connecting rod 12 is inserted into an acetabular assembly sleeve 22 and lined with a fixed bone plate 4. The femoral and sacral arch assembly assembly 1, acetabulum assembly 2 and fixed bone plate are connected through screws 41. Board 4 and the three are fixed together.

The connecting rod 32 of the connecting arch assembly is inserted into another acetabular assembly sleeve 22 and lined with a fixed bone plate 4. The acetabular assembly 2, the connecting arch assembly 3 and the fixed bone plate are connected through screws 41. 4The three are fixed together.

A cushion block 5 is provided between the femoro-sacral arch assembly component 1 and the acetabular component 2, and the thickness of the cushion block 5 is 10 mm.

A cushion block 5 is provided between the acetabular component 2 and the connecting arch assembly 3, and the thickness of the cushion block 5 is 10 mm.

The depth of the acetabular component sleeve 22 is 20mm.

The upper edge of the femoral and sacral arch assembly component 1, the upper edge of the acetabular component 2 and the upper edge of the connecting arch assembly component 3 are all located on the plane of the true pelvic orifice.

The angle between the femoral and sacral arch assembly 1 and the connecting arch assembly 3 where the femoral and sacral arch lines 6 and connecting arch lines 7 are located is within the range of 100±5°;

The orientation of the acetabular component 2 is 40° abduction and 15° anteversion.

Embodiment 2

Please refer to Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7 and Figure 8, which is a second embodiment of the present invention.

The embodiment described in this example is suitable for female patients. Implementation case 2:

A true pelvic orifice bionic prosthesis is composed of a femoral and sacral arch assembly component 1, an acetabular component 2, and a connecting arch assembly component 3.

The femoral and sacral arch assembly assembly 1 includes a femoral and sacral arch assembly assembly main body 11 and a femoral and sacral arch assembly assembly connecting rod 12. The length of the femoral and sacral arch assembly connecting rod 12 is 20 mm; The arch assembly connecting rod 12 is arranged at the lower end of the femoral and sacral arch assembly main body 11. The auricular surface 13 of the femoral and sacral arch assembly main body 11 is provided with a sacral post screw hole 14. The femoral and sacral arch assembly main body 11 11 and the femoral and sacral arch assembly assembly connecting rod 12 are provided with three femoral and sacral arch assembly assembly screw holes 15; the ear-shaped surface 13 is "C" shaped.

The acetabular component 2 includes an acetabular component main body 21 and two acetabular component sleeves 22. The acetabular component main body 21 is hemispherical, and the two acetabular component sleeves 22 are arranged on both sides of the acetabular component main body 21. On the other side, each acetabular component sleeve 22 is provided with a socket 23 inside, and two acetabular component screw holes 24 are provided on the walls of the two acetabular component sleeves 22.

The described coupling bow assembly assembly 3 includes a coupling bow assembly assembly main body 31 and a coupling bow assembly assembly connecting rod 32. The length of the coupling bow assembly assembly connecting rod 32 is 30 mm; the coupling bow assembly assembly connecting rod 32 is set At one end of the coupling bow assembly assembly body 31, three coupling bow assembly assembly screw holes 33 are provided on the coupling bow assembly assembly body 31 and the coupling bow assembly assembly connecting rod 32. The other end of the coupling bow assembly assembly body 31 Two pubic fixation screw holes 34 are provided.

The femoral and sacral arch assembly assembly connecting rod 12 is inserted into an acetabular assembly sleeve 22 and lined with a fixed bone plate 4. The femoral and sacral arch assembly assembly 1, acetabulum assembly 2 and fixed bone plate are connected through screws 41. Board 4 and the three are fixed together.

The connecting rod 32 of the connecting arch assembly is inserted into another acetabular assembly sleeve 22 and lined with a fixed bone plate 4. The acetabular assembly 2, the connecting arch assembly 3 and the fixed bone plate are connected through screws 41. 4The three are fixed together.

There is no spacer 5 between the femoral and sacral arch assembly components 1 and the acetabular component 2 .

A cushion block 5 is provided between the acetabular component 2 and the connecting arch assembly 3, and the thickness of the cushion block 5 is 10mm.

The depth of the acetabular component sleeve 22 is 20mm.

The upper edge of the femoral and sacral arch assembly component 1, the upper edge of the acetabular component 2 and the upper edge of the connecting arch assembly component 3 are all located on the plane of the true pelvic orifice.

The angle between the femoral and sacral arch assembly 1 and the connecting arch assembly 3 where the femoral and sacral arch lines 6 and connecting arch lines 7 are located is within the range of 100±5°;

The orientation of the acetabular component 2 is 40° abduction and 15° anteversion.

Embodiment 3

Please refer to Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7 and Figure 8, which is a third embodiment of the present invention.

The embodiment described in this example is suitable for female patients.

A true pelvic orifice bionic prosthesis is composed of a femoral and sacral arch assembly component 1, an acetabular component 2, and a connecting arch assembly component 3.

The femoral and sacral arch assembly assembly 1 includes a femoral and sacral arch assembly assembly body 11 and a femoral and sacral arch assembly assembly connecting rod 12. The length of the femoral and sacral arch assembly connecting rod 12 is 40mm; The assembly connecting rod 12 is provided at the lower end of the femoral and sacral arch assembly assembly body 11. The ear-shaped surface 13 of the femoral and sacral arch assembly assembly body 11 is provided with sacral post screw holes 14. The femoral and sacral arch assembly assembly body 11 There are three screw holes 15 for the femoral and sacral arch assembly components on the connecting rod 12 of the femoral and sacral arch assembly components; the ear-shaped surface 13 is "C" shaped.

The acetabular component 2 includes an acetabular component main body 21 and two acetabular component sleeves 22. The acetabular component main body 21 is hemispherical, and the two acetabular component sleeves 22 are arranged on both sides of the acetabular component main body 21. On the other side, each acetabular component sleeve 22 is provided with a socket 23 inside, and two acetabular component screw holes 24 are provided on the walls of the two acetabular component sleeves 22.

The coupling bow assembly assembly 3 includes a coupling bow assembly assembly main body 31 and a coupling bow assembly assembly connecting rod 32. The length of the coupling bow assembly assembly connecting rod 32 is 40 mm; the coupling bow assembly assembly connecting rod 32 is arranged on One end of the coupling bow assembly assembly main body 31 is provided with three coupling bow assembly assembly screw holes 33 on the coupling bow assembly assembly main body 31 and the coupling bow assembly assembly connecting rod 32. The other end of the coupling bow assembly assembly main body 31 is provided with three coupling bow assembly assembly screw holes 33. There are two holes 34 for pubic fixation screws.

The femoral and sacral arch assembly assembly connecting rod 12 is inserted into an acetabular assembly sleeve 22 and lined with a fixed bone plate 4. The femoral and sacral arch assembly assembly 1, acetabulum assembly 2 and fixed bone plate are connected through screws 41. Board 4 and the three are fixed together.

The connecting rod 32 of the connecting arch assembly is inserted into another acetabular assembly sleeve 22 and lined with a fixed bone plate 4. The acetabular assembly 2, the connecting arch assembly 3 and the fixed bone plate are connected through screws 41. 4The three are fixed together.

A cushion block 5 is provided between the femoro-sacral arch assembly component 1 and the acetabular component 2, and the thickness of the cushion block 5 is 10 mm.

A cushion block 5 is provided between the acetabular component 2 and the connecting arch assembly 3, and the thickness of the cushion block 5 is 10 mm.

The depth of the acetabular component sleeve 22 is 30mm.

The upper edge of the femoral and sacral arch assembly component 1, the upper edge of the acetabular component 2 and the upper edge of the connecting arch assembly component 3 are all located on the plane of the true pelvic orifice.

The angle between the femoral and sacral arch assembly 1 and the connecting arch assembly 3 where the femoral and sacral arch lines 6 and connecting arch lines 7 are located is within the range of 100±5°;

The orientation of the acetabular component 2 is 40° abduction and 15° anteversion.

Embodiment 4

Please refer to Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7 and Figure 9, which is a fourth embodiment of the present invention.

The embodiment described in this example is suitable for male patients.

A true pelvic orifice bionic prosthesis is composed of a femoral and sacral arch assembly component 1, an acetabular component 2, and a connecting arch assembly component 3.

The femoral and sacral arch assembly assembly 1 includes a femoral and sacral arch assembly assembly body 11 and a femoral and sacral arch assembly assembly connecting rod 12. The length of the femoral and sacral arch assembly connecting rod 12 is 40 mm; The arch assembly connecting rod 12 is arranged at the lower end of the femoral and sacral arch assembly main body 11. The auricular surface 13 of the femoral and sacral arch assembly main body 11 is provided with a sacral post screw hole 14. The femoral and sacral arch assembly main body 11 11 and the femoral and sacral arch assembly assembly connecting rod 12 are provided with three femoral and sacral arch assembly assembly screw holes 15; the ear-shaped surface 13 is "L" shaped.

The acetabular component 2 includes an acetabular component main body 21 and two acetabular component sleeves 22. The acetabular component main body 21 is hemispherical, and the two acetabular component sleeves 22 are arranged on both sides of the acetabular component main body 21. On the other side, each acetabular component sleeve 22 is provided with a socket 23 inside, and two acetabular component screw holes 24 are provided on the walls of the two acetabular component sleeves 22.

The described coupling bow assembly assembly 3 includes a coupling bow assembly assembly main body 31 and a coupling bow assembly assembly connecting rod 32. The length of the coupling bow assembly assembly connecting rod 32 is 20 mm; the coupling bow assembly assembly connecting rod 32 is set At one end of the coupling bow assembly assembly body 31, three coupling bow assembly assembly screw holes 33 are provided on the coupling bow assembly assembly body 31 and the coupling bow assembly assembly connecting rod 32. The other end of the coupling bow assembly assembly body 31 Two pubic fixation screw holes 34 are provided.

The femoral and sacral arch assembly assembly connecting rod 12 is inserted into an acetabular assembly sleeve 22 and lined with a fixed bone plate 4. The femoral and sacral arch assembly assembly 1, acetabulum assembly 2 and fixed bone plate are connected through screws 41. Board 4 and the three are fixed together.

The connecting rod 32 of the connecting arch assembly is inserted into another acetabular assembly sleeve 22 and lined with a fixed bone plate 4. The acetabular assembly 2, the connecting arch assembly 3 and the fixed bone plate are connected through screws 41. 4The three are fixed together.

A cushion block 5 is provided between the femoral and sacral arch assembly component 1 and the acetabular component 2, and the thickness of the cushion block 5 is 20mm.

There is no spacer 5 between the acetabular component 2 and the connecting arch assembly 3.

The depth of the acetabular component sleeve 22 is 20mm.

The upper edge of the femoral and sacral arch assembly component 1, the upper edge of the acetabular component 2 and the upper edge of the connecting arch assembly component 3 are all located on the plane of the true pelvic orifice.

The angle between the femoral and sacral arch assembly 1 and the connecting arch assembly 3 where the femoral and sacral arch lines 6 and connecting arch lines 7 are located is within the range of 100±5°;

The orientation of the acetabular component 2 is 40° abduction and 15° anteversion.

The working principles of the above four embodiments:

The upper edges of the femorosacral arch assembly 1, the acetabulum assembly 2, and the connecting arch assembly 3 in the four embodiments of the present invention are all located on the true pelvic orifice plane; through the upper edge of the sacroiliac joint and the upper edge of the pubic symphysis The upper edge of the acetabular component 2 can be clearly defined by the edge, and then the height of the acetabulum (z-axis) can be determined; the plane of the femoral and sacral arch assembly component 1 is parallel to the inner edge of the acetabular component 2, and the acetabular component 2 can be determined by the width of the sacrum lateral position (x-axis).

The angle between the femoral and sacral arch assembly 1 and the connecting arch assembly 3 where the femoral and sacral arch lines 6 and connecting arch lines 7 are located is relatively fixed within the range of 100±5°; it can be changed by changing the femoral and sacral arch lines 6 and the connecting arch lines 7. The length of the arch assembly 1 on the femoral-sacral arch line 6 adjusts the longitudinal position (y-axis) of the acetabular assembly 2; by adjusting the length of the connecting arch assembly 3 and the femoral-sacral arch assembly 1 of the hemipelvic prosthesis and rotation to realize the docking of the pubic symphysis, thereby restoring the length of the true pelvic orifice and the integrity of the pelvic ring; by adjusting the length and width of the true pelvic orifice and the position of the acetabulum through the three components, the docking of the sacroiliac joint interface and the pubic symphysis interface can be achieved , restore the anatomical position of the acetabulum.

The femorosacral arch assembly 1 and connecting arch assembly 3 can restore the true pelvic mouth length and pubic symphysis docking after adjustment (the rotation fine-tuning range is ±5°, and the impact on the acetabulum orientation is within ±5°). The orientation of the acetabular component is 40° abduction and 15° anteversion.

The femoral and sacral arch assembly component 1 is fixed to the auricular surface of the sacrum through the sacral post screw 16. The connecting part is wide at the top and narrow at the bottom. The dorsal side is fixed to the back of the sacrum through the dorsal sacrum bone plate 17 and screws. The dorsal sacrum bone plate 17 is connected with the prosthetic bone. The body is connected through connecting screws; the connecting arch assembly 3 is fixed to the contralateral pubic symphysis through pubic fixation screws 35.

Claims (1)

1. A true pelvic orifice bionic modular prosthesis, characterized by: consisting of a femoral and sacral arch assembly component (1), an acetabular component (2), and a connecting arch assembly (3); The femoral and sacral arch assembly assembly (1) includes a femoral and sacral arch assembly assembly main body (11) and a femoral and sacral arch assembly assembly connecting rod (12). The femoral and sacral arch assembly assembly connecting rod (12) is arranged on The lower end of the main body of the femoral and sacral arch assembly assembly (11) is provided with a sacral post screw hole (14) on the auricular surface (13) of the main body of the femoral and sacral arch assembly assembly (11). 11) There are several screw holes (15) for the femoral and sacral arch assembly components on the connecting rod (12); The acetabular component (2) includes an acetabular component main body (21) and two acetabular component sleeves (22). The acetabular component main body (21) is hemispherical, and the two acetabular component sleeves (22) ) are arranged on both sides of the acetabular component main body (21). Each acetabular component sleeve (22) is provided with a socket (23) inside, and several acetabulums are provided on the walls of the two acetabular component sleeves (22). Component screw holes (24); The coupling bow assembly assembly (3) includes a coupling bow assembly assembly main body (31) and a coupling bow assembly assembly connecting rod (32). The coupling bow assembly assembly connecting rod (32) is arranged on the coupling bow assembly assembly. At one end of the assembly main body (31), several coupling bow assembly assembly screw holes (33) are provided on the coupling bow assembly assembly body (31) and the coupling bow assembly assembly connecting rod (32). The other end of 31) is provided with several pubic fixation screw holes (34); The femoral and sacral arch assembly connecting rod (12) is inserted into an acetabular assembly sleeve (22), and is lined with a fixed bone plate (4). The femoral and sacral arch assembly (41) is connected to the 1), the acetabular component (2) and the fixed bone plate (4) are fixed together; The connecting rod (32) of the connecting arch assembly assembly is inserted into another acetabular assembly sleeve (22), and is lined with a fixed bone plate (4). The acetabular assembly (2), The connecting arch assembly (3) and the fixed bone plate (4) are fixed together; A cushion block (5) is provided between the femoral and sacral arch assembly components (1) and the acetabular component (2); A cushion block (5) is provided between the acetabular component (2) and the connecting arch assembly (3), and the thickness of the cushion block (5) is 10-30mm; The upper edge of the femoral and sacral arch assembly component (1), the upper edge of the acetabular component (2) and the connecting arch assembly component (3) are all located on the true pelvic orifice plane; The acetabular component (2) is oriented to abduction 40° and anteversion 15°; The auricular surface (13) of the femoral and sacral arch assembly (1) is "C" or "L" shaped; The length of the connecting rod (12) of the femoral and sacral arch assembly components is 20-40mm; The length of the connecting rod (32) of the connecting bow assembly assembly is 20-40mm; The internal depth of the acetabular component sleeve (22) is 20-30mm; The angle between the femoral and sacral arch assembly (1) and the connecting arch assembly (3) is 100° between the femoral and sacral arch lines (6) and the connecting arch line (7). Component (1) Adjust the longitudinal position of the acetabulum in the hemipelvic prosthesis until it is consistent with the longitudinal position of the contralateral acetabulum, mirror the contralateral half of the true pelvic orifice, and assemble the component (3) by adjusting the connecting arch of the hemipelvic prosthesis The length and rotation of the femorosacral arch assembly (1) realize the docking of the pubic symphysis, restoring the length of the true pelvic orifice and the integrity of the pelvic ring.