CN113974927B - Intermediate implant for an implantable prosthesis - Google Patents
Intermediate implant for an implantable prosthesis Download PDFInfo
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- CN113974927B CN113974927B CN202111594143.6A CN202111594143A CN113974927B CN 113974927 B CN113974927 B CN 113974927B CN 202111594143 A CN202111594143 A CN 202111594143A CN 113974927 B CN113974927 B CN 113974927B
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- implant
- bone cement
- limiting groove
- implantable prosthesis
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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
- A61F2/50—Prostheses not implantable in the body
- A61F2/78—Means for protecting prostheses or for attaching them to the body, e.g. bandages, harnesses, straps, or stockings for the limb stump
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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
- A61F2/50—Prostheses not implantable in the body
- A61F2/78—Means for protecting prostheses or for attaching them to the body, e.g. bandages, harnesses, straps, or stockings for the limb stump
- A61F2002/7887—Means for protecting prostheses or for attaching them to the body, e.g. bandages, harnesses, straps, or stockings for the limb stump for connecting limb exoprostheses to the stump bone
Abstract
The invention provides a middle implant of an implanted artificial limb, which comprises: the implant body is provided with a bone cement channel and comprises a threaded section and an artificial limb connecting section, the outer side wall of the threaded section is provided with an external thread and a limiting groove which are arranged in an intersecting manner, the external thread and the limiting groove are both of a spiral structure, the rotating direction of the limiting groove is opposite to that of the external thread, the threaded section is provided with a plurality of first overflow holes which are arranged at intervals along the extending direction of the limiting groove, one end of each first overflow hole penetrates through the channel wall of the bone cement channel and is communicated with the bone cement channel, and the other end of each first overflow hole penetrates through the bottom wall of the limiting groove and is communicated with the limiting groove; the sealing element is arranged at the inlet of the bone cement channel and used for plugging the bone cement channel. Through the technical scheme provided by the application, the problem of poor bone internal fixation effect of the middle implant of the implantable prosthesis in the related technology can be solved.
Description
Technical Field
The invention relates to the technical field of prostheses, in particular to a middle implant of an implantable prosthesis.
Background
The installation artificial limb can improve each system function of the artificial limb, can compensate the functions of leg and foot walking and arm grabbing, and is beneficial to restoring the working capacity of artificial limb friends. However, prostheses have a number of disadvantages. For example, the defective production of the receiving cavity easily causes the deformation of the stump, the generation of sarcoma due to long-term compression, severe pain and the weariness of the amputee. The traditional artificial limb has the defects of poor receiving cavity-residual limb interface environment and air permeability, easy generation of peculiar smell, residual limb infection caused by friction, limited limb movement range, incapability of installing the artificial limb for the residual limb with over-short limb and the like.
The built-in bone integrated artificial limb is a revolution of artificial limb assembling technology, and it thoroughly solves the disadvantages of transferring force through receiving cavity and soft tissue and unreasonable biomechanics, and the artificial limb can be assembled at the same time of amputation operation. The implantable prosthesis (implantable osseointegrated prosthesis) comprises a middle implant and an external prosthesis connected with the extending end of the middle implant. The middle implant body is made of biocompatible material, is a part which is implanted into the cavity of the limb bone percutaneously, realizes osseous combination with the limb bone, and the extending end of the middle implant body is sealed by the bioactive material percutaneously.
The implanted artificial limb adopts an interface processing mode from the inside of the limb to the outside of the limb, and because the receiving cavity is not used, the soft tissue at the stump does not bear the force, the stress state is more reasonable, and the motion range is enlarged. However, the intermediate implant of the implantable prosthesis in the related art has poor intraosseous fixation effect, and particularly, the intraosseous fixation difficulty is higher when the bone cavity is large and the mouth is relatively small.
Disclosure of Invention
The invention provides an intermediate implant of an implantable prosthesis, which aims to solve the problem of poor intraosseous fixation effect of the intermediate implant of the implantable prosthesis in the related technology.
The invention provides a middle implant of an implanted artificial limb, which comprises: the implant body is provided with a bone cement channel and comprises a threaded section and an artificial limb connecting section, the outer side wall of the threaded section is provided with an external thread and a limiting groove which are arranged in an intersecting manner, the external thread and the limiting groove are both of a spiral structure, the rotating direction of the limiting groove is opposite to that of the external thread, the threaded section is provided with a plurality of first overflow holes which are arranged at intervals along the extending direction of the limiting groove, one end of each first overflow hole penetrates through the channel wall of the bone cement channel and is communicated with the bone cement channel, and the other end of each first overflow hole penetrates through the bottom wall of the limiting groove and is communicated with the limiting groove; the sealing element is arranged at the inlet of the bone cement channel and used for plugging the bone cement channel.
Further, the upper end of the limiting groove extends to the upper end of the external thread, and the lower end of the limiting groove extends to the lower end of the external thread.
Further, the lead angle of the external thread is between 10 degrees and 15 degrees, the thread pitch of the external thread is between 2mm and 4mm, and the tooth depth of the external thread is between 2mm and 3 mm.
Further, the width of the limiting groove is between 2mm and 3mm, and the distance between two adjacent limiting grooves in the axial direction of the implant body is between 6mm and 9 mm.
Furthermore, the middle implant body of the implantable artificial limb further comprises a plugging piece, the implant body further comprises a plugging section located above the threaded section, the plugging piece is arranged at the upper end of the plugging section, and the outer side wall of the plugging piece protrudes out of the outer side wall of the threaded section.
Further, the shutoff piece is the annular plate, and the lateral wall of shutoff section is located to the annular plate cover, is provided with a plurality of open structure on the annular plate, and a plurality of open structure set up along the circumference interval of annular plate, and open structure runs through upper surface, lower surface and the lateral wall of annular plate.
Further, the open structure includes top opening, bottom opening and side opening, and the top opening runs through the upper surface of annular plate, and the bottom opening runs through the lower surface of annular plate, and the side opening runs through the lateral wall of annular plate, and the extending direction of top opening is the same with the extending direction of bottom opening, and top opening's extending direction and bottom opening's extending direction all have the contained angle with the radial direction of annular plate between.
Further, the extension direction of the side opening forms an included angle with the axial direction of the annular plate.
Furthermore, the blocking section is provided with a plurality of second overflow holes which are arranged at intervals along the circumferential direction of the implant body, the second overflow holes are positioned above the thread section, the second overflow holes are positioned below the blocking piece, and two ends of each second overflow hole respectively penetrate through the outer side wall of the blocking section and the channel wall of the bone cement channel.
Further, the included angle between the projections of the axes of the adjacent two first overflow holes in the horizontal direction is between 30 ° and 60 °.
Further, the sealing member includes staple and sealing washer, and the bone cement passageway includes the hole along the axial extension of implant body, and the staple wears to locate the hole and with implant body coupling, and the sealing washer clamp is established between staple and implant body.
Furthermore, the artificial limb connecting section comprises a porous section, a transition section and an interface section which are sequentially arranged from top to bottom, the upper end of the porous section is connected with the lower end of the threaded section, the outer side wall of the porous section is of a porous structure, the outer side wall of the transition section is polished and provided with an antibacterial coating, and the interface section is connected with an external artificial limb; and/or the implant body is of a columnar structure.
By applying the technical scheme of the invention, the middle implant of the implantable prosthesis comprises an implant body and a sealing element, the threaded section of the implant body is inserted into the bone cavity of the stump of a patient, the implant body is in threaded connection with the stump of the patient through the threaded section, bone cement is injected into a bone cement channel of the implant body, the bone cement overflows between the outer wall of the implant body and the cavity wall of the bone cavity of the stump through a plurality of first overflow holes which are communicated with the bone cement channel and are arranged at intervals, and the inlet of the bone cement channel at the lower end of the implant body is sealed through the sealing element, so that the bone cement is solidified in the cavity to play a role in fixation.
Wherein, because it has bone cement to fill between the outer wall of implant body and the chamber wall in incomplete limb bone cavity for the middle implant body can utilize bone cement to carry on spacingly after being connected with patient's incomplete limb, and the implant body takes place to rock in the middle of avoiding, can promote the fixed fastness of implanting. Especially, when the bone cavity is large and the mouth is relatively small, the bone cavity is filled with bone cement, so that a good fixing effect can be realized. And, bone cement forms the spacing boss the same with the direction of rotation of spacing groove after solidifying in the spacing groove, because the direction of rotation of spacing groove is opposite with the direction of rotation of the external screw thread of screw thread section, and external screw thread and spacing groove intersect the setting, so the direction of rotation of spacing boss is opposite with the direction of rotation of external screw thread, and spacing boss and external screw thread are crossing to be set up, therefore spacing boss and external screw thread interact form spacingly to the screw thread section, avoid the reverse back screw-out of implant body, the fixed effect in the bone of the middle implant body of the further reinforcing implanted artificial limb. And, because a plurality of first overflow hole along the extending direction interval setting of spacing groove, spill over the in-process between the outer wall of implant body and the chamber wall of incomplete limb bone cavity at bone cement through a plurality of first overflow hole, bone cement can fill up and be full of whole section spacing groove for can play firm spacing effect after the bone cement of spacing inslot solidifies, and then can further promote the fixed effect in the bone of the middle implant of implanted artificial limb.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of an intermediate implant for an implantable prosthesis according to an embodiment of the present invention;
FIG. 2 illustrates a front view of an intermediate implant of an implantable prosthesis provided in accordance with an embodiment of the present invention;
FIG. 3 shows a cross-sectional view at A-A in FIG. 2;
FIG. 4 shows a cross-sectional view at B-B in FIG. 2;
FIG. 5 shows a schematic dimension diagram at C in FIG. 3;
fig. 6 shows a schematic structural view of the closure of fig. 1;
fig. 7 shows a schematic view of the closure element from another point of view in fig. 1.
Wherein the figures include the following reference numerals:
10. an implant body; 11. a bone cement channel; 111. an inner bore; 12. a threaded segment; 121. an external thread; 122. a limiting groove; 123. a first overflow aperture; 13. a prosthetic limb connecting section; 131. a porous section; 132. a transition section; 133. an interface section; 14. a plugging section; 141. a second overflow aperture;
20. a seal member; 21. fixing nails; 22. a seal ring;
30. a blocking member; 31. an annular plate; 311. an open structure; 3111. the top is open; 3112. the bottom is open; 3113. a side opening;
D. the pitch of the external thread; E. the depth of the external thread; F. the width of the limiting groove; G. spacing of the limiting grooves.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 7, an embodiment of the present invention provides an intermediate implant of an implantable prosthesis, the intermediate implant of the implantable prosthesis includes an implant body 10 and a sealing member 20, the implant body 10 has a bone cement channel 11, the implant body 10 includes a threaded section 12 and a prosthesis connecting section 13, an outer side wall of the threaded section 12 has an external thread 121 and a limiting groove 122 intersecting each other, the external thread 121 and the limiting groove 122 are both of a spiral structure, a rotation direction of the limiting groove 122 is opposite to a rotation direction of the external thread 121, the threaded section 12 has a plurality of first overflow holes 123 spaced apart along an extending direction of the limiting groove 122, one end of each first overflow hole 123 penetrates through a channel wall of the bone cement channel 11 and communicates with the bone cement channel 11, the other end of each first overflow hole 123 penetrates through a bottom wall of the limiting groove 122 and communicates with the limiting groove 122, an inlet of the bone cement channel 11 is located at a lower end of the implant body 10, the sealing member 20 is disposed at an inlet of the bone cement passage 11 and blocks the bone cement passage 11.
By applying the technical scheme of the invention, the middle implant of the implantable prosthesis comprises an implant body 10 and a sealing element 20, the threaded section 12 of the implant body 10 is inserted into the bone cavity of the stump of a patient, the implant body 10 is in threaded connection with the stump of the patient through the threaded section 12, bone cement is injected into the bone cement channel 11 of the implant body 10, the bone cement overflows to the space between the outer wall of the implant body 10 and the cavity wall of the bone cavity of the stump through a plurality of first overflow holes 123 which are communicated with the bone cement channel 11 and are arranged at intervals, and the inlet of the bone cement channel 11 at the lower end of the implant body 10 is blocked through the sealing element 20, so that the bone cement is solidified in the cavity to play a role of fixation.
Wherein, because it has bone cement to fill between the outer wall of implant body 10 and the chamber wall in incomplete limb bone cavity for the middle implant body can utilize bone cement to carry on spacingly after being connected with patient's incomplete limb, and the implant body takes place to rock in the middle of avoiding, can promote the fixed fastness of implanting. Especially, when the bone cavity is large and the mouth is relatively small, the bone cavity is filled with bone cement, so that a good fixing effect can be realized. And, bone cement forms the spacing boss the same with the direction of rotation of spacing groove 122 after solidifying in spacing groove 122, because the direction of rotation of spacing groove 122 is opposite with the direction of rotation of external screw thread 121 of screw thread section 12, and external screw thread 121 intersects the setting with spacing groove 122, so the direction of rotation of spacing boss is opposite with the direction of rotation of external screw thread 121, and spacing boss intersects the setting with external screw thread 121, therefore spacing boss and external screw thread 121 interact form spacingly to screw thread section 12, avoid implant body 10 to screw out in reverse, further strengthened the fixed effect in the bone of the middle implant of implanted prosthesis. Moreover, since the plurality of first overflow holes 123 are arranged at intervals along the extending direction of the limiting groove 122, when the bone cement overflows to the space between the outer wall of the implant body 10 and the cavity wall of the bone cavity of the stump through the plurality of first overflow holes 123, the whole limiting groove 122 can be filled with the bone cement, so that the bone cement in the limiting groove 122 can play a stable limiting effect after being solidified, and further the bone internal fixation effect of the middle implant of the implantable prosthesis can be further improved.
In this embodiment, the upper end of the limiting groove 122 extends to the upper end of the external thread 121, and the lower end of the limiting groove 122 extends to the lower end of the external thread 121. By adopting the structure, the upper end and the lower end of the limiting groove 122 and the external thread 121 are consistent, and the limiting boss formed after the bone cement is solidified in the limiting groove 122 limits the whole thread section 12, so that the bone internal fixation effect of the middle implant of the implantable prosthesis is further enhanced.
Specifically, the external thread 121 is a right-hand thread, and the rotation direction of the limiting groove 122 is a left-hand thread.
As shown in fig. 3 and 5, the lead angle of the external thread 121 is between 10 ° and 15 °, the pitch D of the external thread 121 is between 2mm and 4mm, and the depth E of the external thread 121 is between 2mm and 3 mm. The external thread 121 with the size can be matched with the residual limb bone cavity of a patient, and meanwhile, the installation is convenient.
The lead angle of the external thread 121 may be any one of 10 °, 11 °, 12 °, 13 °, 14 °, 15 °, and 10 ° to 15 °. The pitch D of the external thread 121 may be any value between 2mm, 2.5mm, 3mm, 3.5mm, 4mm, and 2mm to 4 mm. The depth E of the external threads 121 may be any value between 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, and 2mm to 3 mm. In the present embodiment, the pitch D of the external thread 121 is 3 mm.
As shown in fig. 3 and 5, the width F of the limiting grooves 122 is between 2mm and 3mm, and the distance G between two adjacent limiting grooves 122 in the axial direction of the implant body 10 is between 6mm and 9 mm. The width F of the limiting groove 122 is set according to the size, so that the size of the limiting boss formed after solidification in the limiting groove 122 is close to that of the external thread, and a good limiting effect can be achieved.
The width F of the limiting groove 122 may be any value between 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, and 2mm to 3 mm. The distance G between two adjacent limiting grooves 122 may be any value between 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, and 6mm to 9 mm.
As shown in fig. 1, the intermediate implant of the implantable prosthesis further includes a blocking member 30, the implant body 10 further includes a blocking section 14 located above the threaded section 12, the blocking member 30 is disposed at an upper end of the blocking section 14, and an outer sidewall of the blocking member 30 protrudes from an outer sidewall of the threaded section 12. Adopt shutoff piece 30 can form the effect of blockking to bone cement, can effectively guarantee bone cement to the good packing in clearance and the compactness of inside distribution under the pressure environment, guarantee bone cement's intensity.
In this embodiment, the occluding member 30 is made of a medical grade high cross-linked polyethylene (UHMW-PE) material.
As shown in fig. 1 and 7, the blocking member 30 is an annular plate 31, the annular plate 31 is sleeved on the outer side wall of the blocking section 14, a plurality of opening structures 311 are arranged on the annular plate 31, the plurality of opening structures 311 are arranged at intervals along the circumferential direction of the annular plate 31, and the opening structures 311 penetrate through the upper surface, the lower surface and the outer side wall of the annular plate 31. By providing a plurality of opening structures 311 in the annular plate 31, the screw-in of the intermediate implant is facilitated by the opening structures 311 being constricted when the threaded segment 12 is screwed into the residual limb bone cavity.
In this embodiment, the annular plate 31 includes a position-limiting inner ring and a contraction outer ring, the plurality of opening structures 311 are located on the contraction outer ring and extend to the position-limiting inner ring, the implant body 10 has an annular groove located at the upper end of the plugging section 14, and the position-limiting inner ring is clamped in the annular groove.
As shown in fig. 7, the opening structure 311 includes a top opening 3111, a bottom opening 3112 and a side opening 3113, the top opening 3111 penetrates through the upper surface of the annular plate 31, the bottom opening 3112 penetrates through the lower surface of the annular plate 31, the side opening 3113 penetrates through the outer side wall of the annular plate 31, the top opening 3111 extends in the same direction as the bottom opening 3112, and both the top opening 3111 and the bottom opening 3112 extend at an angle to the radial direction of the annular plate 31. The side opening 3113 extends at an angle to the axial direction of the annular plate 31. With the above-described structure of the opening structure 311, the opening structure 311 may be formed in a propeller-like shape, which facilitates the contraction of the opening structure 311.
In this embodiment, when the threaded segment 12 is screwed into the bone cavity of the stump, the opening structure 311 of the annular plate 31 shrinks according to the shape of the bone cavity of the stump of the patient, and after the final installation position is reached, the top opening 3111, the bottom opening 3112 and the side openings 3113 all shrink to disappear, so that the annular plate 31 is formed into a tight plate shape to prevent bone cement from passing.
As shown in fig. 1 and 4, the blocking section 14 is provided with a plurality of second overflow holes 141, the plurality of second overflow holes 141 are arranged at intervals along the circumferential direction of the implant body 10, the second overflow holes 141 are located above the threaded section 12, the second overflow holes 141 are located below the blocking piece 30, and two ends of the second overflow holes 141 respectively penetrate through the outer side wall of the blocking section 14 and the channel wall of the bone cement channel 11. The bone cement can overflow through the second overflow hole 141, so that the space between the threaded section 12 and the blocking member 30 of the residual limb bone cavity of the patient is filled with the bone cement, and the intraosseous fixation effect of the middle implant of the implantable prosthesis is further improved.
In this embodiment, the plugging section 14 is provided with 8 second overflow holes uniformly arranged in the circumferential direction.
It should be noted that the included angle between the projections of the axes of the adjacent two first overflow holes 123 in the horizontal direction is between 30 ° and 60 °. With the above arrangement, the structural strength of the threaded section 12 is not affected, and the bone cement can be quickly and uniformly overflowed through the first overflow hole 123. If the included angle between the projections of the axes of the two adjacent first overflow holes 123 in the horizontal direction is less than 30 °, the structural strength of the threaded section 12 is affected, and if the included angle between the projections of the axes of the two adjacent first overflow holes 123 in the horizontal direction is greater than 60 °, the overflow of the bone cement is slow.
Wherein, the included angle between the projections of the axes of two adjacent first overflow holes 123 in the horizontal direction may be any value between 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, 60 °, and 30 ° to 60 °. In the present embodiment, the included angle between the projections of the axes of the adjacent two first overflow holes 123 in the horizontal direction is 45 °.
As shown in fig. 3, the sealing member 20 includes a fixing pin 21 and a sealing ring 22, the cement passage 11 includes an inner hole 111 extending along the axial direction of the implant body 10, the fixing pin 21 is inserted into the inner hole 111 and connected with the implant body 10, and the sealing ring 22 is sandwiched between the fixing pin 21 and the implant body 10. Can carry out the shutoff to the bone cement in the hole 111 through staple 21, adopt sealing washer 22 can effectively isolated internal and external environment, avoid outside bacterial infection.
In this embodiment, the fixing pin 21 is screwed into the inner hole 111. The inner hole 111 comprises a communicating section, a connecting section and a flaring section which are sequentially connected from top to bottom, the communicating section is communicated with the first overflow hole 123, the fixing nail 21 is in threaded connection with the connecting section, the flaring section is provided with a groove, a first step surface is formed between the flaring section and the connecting section, the fixing nail 21 comprises a screw body and a screw cap, a second step surface is formed between the screw body and the screw cap, and the sealing ring is located in the groove and clamped between the first step surface and the second step surface.
It should be noted that the sealing ring 22 is made of a silicon rubber material, and has a self-sealing capability.
As shown in fig. 1 and 2, the prosthesis connecting section 13 includes a porous section 131, a transition section 132 and a connector section 133, which are sequentially arranged from top to bottom, the upper end of the porous section 131 is connected with the lower end of the threaded section 12, the outer sidewall of the porous section 131 has a porous structure, the outer sidewall of the transition section 132 is polished and provided with an antibacterial coating, the connector section 133 is connected with the external prosthesis, and the fusion speed of the implant body 10 and the stump of the patient can be increased through the porous structure. The outer side wall of the transition section 132 is polished and provided with an antibacterial coating to prevent external bacterial infection. The prosthesis can be connected to the implant body 10 by means of an interface section.
In particular, the antimicrobial coating may be provided as a silver or copper plated or alloy coating.
In the present embodiment, the implant body 10 is a columnar structure.
The intermediate implant of the implanted artificial limb comprises the following two mounting methods:
1) during operation, the thread section 12 of the middle implant of the implanted artificial limb is inserted into the stump bone cavity, the artificial limb connecting section 13 directly extends out of the body through soft tissues and skin, and the external artificial limb is arranged on the interface section 133;
2) during operation, the thread section 12 of the middle implant of the implanted artificial limb is inserted into the stump bone cavity, the middle implant of the whole implanted artificial limb is sewed in the stump skin, after the middle implant of the implanted artificial limb is firmly combined with the bone, a second operation is carried out, the artificial limb connecting section 13 is stripped, and the artificial limb connecting section extends out of the human body through soft tissues and skin; after the intermediate implant of the implantable prosthesis has been lengthened and secured to the bone and skin interface, the outer prosthesis is installed on the implant interface section 133.
The following describes a first method for installing an intermediate implant of an implantable prosthesis:
1) selecting a middle implant body of an implanted artificial limb with a proper diameter by preoperative measurement;
2) pre-drilling a bottom hole;
3) installing the plugging member 30 in the groove of the plugging section 14;
4) screwing the middle implant body of the implanted artificial limb into a preset position;
5) injecting self-setting bone cement through the bone cement passage 11;
6) the fixing nail 21 is screwed in to press the silicon rubber sealing ring 22.
The intermediate implant body of the implantable prosthesis provided by the invention has the following beneficial effects:
(1) because the bone cement is filled between the outer wall of the implant body 10 and the wall of the bone cavity of the stump, the middle implant body can be limited by the bone cement after being connected with the stump of a patient, the middle implant body is prevented from shaking, and the implanted fixation firmness can be improved. Bone cement forms the same spacing boss with the direction of rotation of spacing groove 122 after solidifying in spacing groove 122, because the direction of rotation of spacing groove 122 is opposite with the direction of rotation of external screw thread 121 of screw thread section 12, and external screw thread 121 intersects the setting with spacing groove 122, so the direction of rotation of spacing boss is opposite with the direction of rotation of external screw thread 121, and spacing boss intersects the setting with external screw thread 121, therefore spacing boss and external screw thread 121 interact form spacingly to screw thread section 12, avoid implant body 10 to screw out in reverse, the fixed effect in the bone of the middle implant of the further reinforcing implantation type artificial limb. Because the plurality of first overflow holes 123 are arranged at intervals along the extending direction of the limiting groove 122, when bone cement overflows to the space between the outer wall of the implant body 10 and the cavity wall of the bone cavity of the stump through the plurality of first overflow holes 123, the bone cement can fill the whole limiting groove 122, so that the bone cement in the limiting groove 122 can play a stable limiting effect after being solidified. The bone cement can overflow through the second overflow hole 141, so that the space of the residual limb bone cavity of the patient between the threaded section 12 and the blocking piece 30 is filled with the bone cement, and the intraosseous fixation effect of the middle implant of the implantable prosthesis is further enhanced;
(2) the top opening 3111 extends in the same direction as the bottom opening 3112, and both the top opening 3111 and the bottom opening 3112 extend at an angle to the radial direction of the annular plate 31. The side opening 3113 extends at an angle to the axial direction of the annular plate 31. By adopting the opening structure 311 with the structure, the opening structure 311 can be formed into a shape similar to a propeller, so that the opening structure 311 can be conveniently contracted;
(3) can carry out the shutoff to the bone cement in the hole 111 through staple 21, adopt sealing washer 22 can effectively isolated internal and external environment, avoid outside bacterial infection.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. An intermediate implant for an implantable prosthesis, the intermediate implant comprising:
the implant body (10) is provided with a bone cement channel (11), the implant body (10) comprises a threaded section (12) and a prosthesis connecting section (13), the outer side wall of the threaded section (12) is provided with an external thread (121) and a limiting groove (122) which are arranged in an intersecting manner, the external thread (121) and the limiting groove (122) are both of a spiral structure, the rotation direction of the limiting groove (122) is opposite to that of the external thread (121), the threaded section (12) is provided with a plurality of first overflow holes (123) which are arranged at intervals along the extension direction of the limiting groove (122), one ends of the first overflow holes (123) penetrate through the channel wall of the bone cement channel (11) and are communicated with the bone cement channel (11), and the other ends of the first overflow holes (123) penetrate through the bottom wall of the limiting groove (122) and are communicated with the limiting groove (122);
a sealing element (20), wherein the inlet of the bone cement channel (11) is positioned at the lower end of the implant body (10), and the sealing element (20) is arranged at the inlet of the bone cement channel (11) and blocks the bone cement channel (11);
the upper end of the limiting groove (122) extends to the upper end of the external thread (121), and the lower end of the limiting groove (122) extends to the lower end of the external thread (121).
2. An intermediate implant for an implantable prosthesis according to claim 1, characterized in that the helix angle of the external thread (121) is between 10 ° and 15 °, the pitch of the external thread (121) is between 2mm and 4mm, and the depth of the thread (121) is between 2mm and 3 mm.
3. Intermediate implant for an implantable prosthesis according to claim 1, characterized in that the width of the limiting grooves (122) is between 2mm and 3mm, and the distance between two adjacent limiting grooves (122) in the axial direction of the implant body (10) is between 6mm and 9 mm.
4. The intermediate implant of an implantable prosthesis according to any one of claims 1 to 3, wherein the intermediate implant of an implantable prosthesis further comprises a blocking piece (30), the implant body (10) further comprises a blocking section (14) located above the threaded section (12), the blocking piece (30) is arranged at the upper end of the blocking section (14), and the outer side wall of the blocking piece (30) protrudes from the outer side wall of the threaded section (12).
5. An intermediate implant for an implantable prosthesis according to claim 4, wherein the blocking member (30) is an annular plate (31), the annular plate (31) is sleeved on the outer side wall of the blocking section (14), a plurality of opening structures (311) are arranged on the annular plate (31), the plurality of opening structures (311) are arranged at intervals along the circumference of the annular plate (31), and the opening structures (311) penetrate through the upper surface, the lower surface and the outer side wall of the annular plate (31).
6. An intermediate implant for an implantable prosthesis according to claim 5, characterized in that said opening structure (311) comprises a top opening (3111), a bottom opening (3112) and a side opening (3113), said top opening (3111) extending through the upper surface of said annular plate (31), said bottom opening (3112) extending through the lower surface of said annular plate (31), said side opening (3113) extending through the outer side wall of said annular plate (31), the direction of extension of said top opening (3111) being the same as the direction of extension of said bottom opening (3112), the direction of extension of said top opening (3111) and the direction of extension of said bottom opening (3112) each having an angle with the radial direction of said annular plate (31).
7. An intermediate implant for an implantable prosthesis according to claim 6, characterized in that the lateral openings (3113) extend at an angle to the axial direction of the annular plate (31).
8. The intermediate implant of an implantable prosthesis according to claim 4, wherein the blocking section (14) is provided with a plurality of second overflow holes (141), the plurality of second overflow holes (141) are arranged at intervals along the circumferential direction of the implant body (10), the second overflow holes (141) are located above the threaded section (12), the second overflow holes (141) are located below the blocking piece (30), and two ends of the second overflow holes (141) respectively penetrate through the outer side wall of the blocking section (14) and the channel wall of the cement channel (11).
9. An intermediate implant for an implantable prosthesis according to any one of claims 1 to 3, characterized in that the angle between the projections of the axes of two adjacent first outflow holes (123) in the horizontal direction is between 30 ° and 60 °.
10. An intermediate implant for an implantable prosthesis according to any one of claims 1 to 3, characterized in that said sealing means (20) comprises a fixation spike (21) and a sealing ring (22), said cement channel (11) comprising an inner bore (111) extending in the axial direction of said implant body (10), said fixation spike (21) being inserted through said inner bore (111) and being connected to said implant body (10), said sealing ring (22) being interposed between said fixation spike (21) and said implant body (10).
11. An intermediate implant for an implantable prosthesis according to any one of claims 1 to 3,
the artificial limb connecting section (13) comprises a porous section (131), a transition section (132) and an interface section (133) which are sequentially arranged from top to bottom, the upper end of the porous section (131) is connected with the lower end of the threaded section (12), the outer side wall of the porous section (131) is of a porous structure, the outer side wall of the transition section (132) is subjected to polishing treatment and is provided with an antibacterial coating, and the interface section (133) is connected with an external artificial limb; and/or the presence of a gas in the atmosphere,
the implant body (10) is of a columnar structure.
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| CN202111594143.6A CN113974927B (en) | 2021-12-24 | 2021-12-24 | Intermediate implant for an implantable prosthesis |
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| CN202111594143.6A CN113974927B (en) | 2021-12-24 | 2021-12-24 | Intermediate implant for an implantable prosthesis |
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| CN113974927B true CN113974927B (en) | 2022-05-03 |
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