CN109938881B - Artificial bone mounting mechanism - Google Patents
Artificial bone mounting mechanism Download PDFInfo
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- CN109938881B CN109938881B CN201711387098.0A CN201711387098A CN109938881B CN 109938881 B CN109938881 B CN 109938881B CN 201711387098 A CN201711387098 A CN 201711387098A CN 109938881 B CN109938881 B CN 109938881B
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 150
- 230000007246 mechanism Effects 0.000 title claims abstract description 40
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 230000013011 mating Effects 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 14
- 239000013585 weight reducing agent Substances 0.000 claims description 4
- 230000007480 spreading Effects 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 238000004378 air conditioning Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 32
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- 238000000034 method Methods 0.000 description 18
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000011084 recovery Methods 0.000 description 8
- 238000001356 surgical procedure Methods 0.000 description 7
- 206010052428 Wound Diseases 0.000 description 5
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- 239000002639 bone cement Substances 0.000 description 4
- 230000004221 bone function Effects 0.000 description 4
- 238000004904 shortening Methods 0.000 description 4
- 238000010146 3D printing Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 2
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- 230000008602 contraction Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
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- 238000000926 separation method Methods 0.000 description 2
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- 229910001069 Ti alloy Inorganic materials 0.000 description 1
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- 239000000560 biocompatible material Substances 0.000 description 1
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Abstract
The invention discloses an artificial bone mounting mechanism, which comprises a bone body, wherein the bone body is provided with a first sleeve joint hole and a second sleeve joint hole, and is also provided with a first fastening hole and a first matching hole which are arranged through the side wall of the first sleeve joint hole, and a second fastening hole and a second matching hole which are arranged through the side wall of the second sleeve joint hole; the connecting assembly comprises two intramedullary nails, and the intramedullary nails comprise connecting bodies and fixing bodies which are movably arranged in the first sleeving holes or the second sleeving holes; the pressing end of the fastening piece can penetrate through the first fastening hole or the second fastening hole, is pressed and fixed with the connecting body, and enables the corresponding fixing body of the intramedullary nail to be fixed at the end part of the bone body in a protruding mode. The installation mechanism of the artificial bone reduces the treatment duration of the bone defect and improves the success rate and the reliability of the bone defect treatment.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to an artificial bone mounting mechanism.
Background
At present, for large-section bone defects caused by severe bone trauma, bone tumor excision and other reasons, the main treatment method is as follows: 1) Bone grafting, which is to repair a large-section bone defect part by grafting autologous bone (such as tibia and the like) or allogeneic bone, has a certain clinical effect at present, but the bone defect repair by grafting autologous bone brings new wounds, and if the grafting fails, the patient is more injured; by transplanting the allograft bone, complications such as infection, bone nonunion and the like or rejection phenomenon can occur, and the risk of disease transmission exists; 2) The bone cement is filled by fixing the intramedullary nail at the defect and then wrapping the intramedullary nail by the bone cement, so that the bone defect is filled, the bone cement can be separated from the intramedullary nail after being fixed for a long time due to the physical and chemical characteristics of the bone cement, and in addition, the intramedullary nail can be shifted, so that the fixation is not firm.
At present, after bone defect, the defect part can be in a load-free or waste state for a long time due to the long treatment time of the treatment method, so that the condition of osteoporosis is caused, the function health of the defect part is not facilitated, and serious complications are easily caused.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a mechanism for installing artificial bone and a method for producing and assembling the same, which can reduce the treatment time of bone defects and improve the success rate and reliability of bone defect treatment.
The technical scheme is as follows:
the utility model provides an artificial bone's installation mechanism, includes the bone body, the bone body is equipped with first socket joint hole and second socket joint hole, first socket joint hole with the second socket joint hole interval set up in the both ends face of bone body, the bone body still is equipped with runs through first fastening hole and first mating hole that the lateral wall of first socket joint hole set up, and runs through second fastening hole and second mating hole that the lateral wall of second socket joint hole set up, first fastening hole with second fastening hole interval set up in the both ends of bone body, first mating hole with second mating hole interval set up in between first fastening hole and the second fastening hole; the connecting assembly comprises two intramedullary nails, wherein the intramedullary nails comprise connecting bodies and fixing bodies, the connecting bodies and the fixing bodies are movably arranged in the first sleeving holes or the second sleeving holes, one ends of the connecting bodies are fixed with one ends of the fixing bodies, and the fixing bodies are provided with fixing parts; the fastening assembly comprises two fasteners, the two fasteners correspond to the two intramedullary nails one by one, the pressing ends of the fasteners can penetrate through the first fastening holes or the second fastening holes to be pressed and fixed with the connecting body, and the corresponding fixing bodies of the intramedullary nails are protruded and fixed at the end parts of the bone body.
When the mounting mechanism of the artificial bone is applied to bone defect treatment, according to the actual bone defect amount and the actual mounting requirement of a patient, printing a required bone body by using a 3D printer, respectively inserting two intramedullary nails into a first sleeve joint hole and a second sleeve joint hole, and adjusting the positions of the two intramedullary nails to enable the two intramedullary nails to completely enter the bone body; then the bone body is placed at the bone defect position, the first matching hole and the second matching hole are utilized, the two intramedullary nails can slide along opposite directions through the opening mechanism or the driving mechanism, the fixing bodies are embedded into the intramedullary cavity, when the fixing bodies reach the proper positions, the two fastening pieces are respectively locked, the pressing ends of the fastening pieces are pressed and fixed with the connecting bodies, the corresponding fixing bodies of the intramedullary nails are protruded and fixed in the intramedullary cavity, the bone body is fixed on the affected bone through the fixing parts, and the intramedullary nails in the fixing mode cannot shift and are more firm in fixation. The mounting mechanism of the artificial bone can quickly construct the needed defective section bone through 3D printing according to the actual bone defect quantity of a patient, is beneficial to shortening the bone function recovery time and quickening the recovery self-care ability of the patient; simultaneously, the intramedullary nail can be placed in the bone body and the bone body is fixed on the affected bone in a way of expanding towards two sides, so that the defect part of the affected bone is only required to be cut in the operation process, the wound area is reduced, and the healing after the operation is quickened.
The technical scheme is further described as follows:
in one embodiment, the connecting body is in sliding fit with the first sleeve joint hole or the second sleeve joint hole, and a limiting groove in limiting fit with the pressing end of the fastener is formed in the side wall of the connecting body. Placing the intramedullary nail in a first sleeve joint hole of the bone body, screwing the fastener through the first fastening hole, or placing the intramedullary nail in a second sleeve joint hole of the bone body, and screwing the fastener through the second fastening hole; the pressing end of the fastener is in limit fit with the limit groove, so that the intramedullary nail can slide in the preset range of the bone body, but cannot be separated from the bone body.
In one embodiment, the other end of the connecting body is provided with a matching end, the fixing part comprises an internal threaded hole and a locking nail fixedly connected with the internal threaded hole, the mounting mechanism further comprises a guide piece, one end of the guide piece is provided with a limiting body, the other end of the guide piece is provided with a sleeve, the sleeve is provided with a guide through hole, and the guide through hole faces the limiting body; the limiting body is inserted into the first matching hole or the second matching hole and is in limiting abutment with the corresponding matching end, so that the center line of the guide through hole and the center line of the internal threaded hole are in the same straight line. The locking nail can be accurately inserted into the internal threaded hole of the intramedullary nail through the guide piece, and the bone body and the affected bone can be fixed through the cooperation of the locking nail and the internal threaded hole; specifically, insert the spacing body of guide piece first mating hole or second mating hole, with the spacing butt joint of corresponding mating end, make the central line of direction through-hole and the central line of internal thread hole be on same straight line, and then locking nail accessible direction through-hole screw in the internal thread hole that corresponds, make bone body and suffering bone fixed connection, this in-process, spacing body and mating end are spacing to be in the same straight line all the time with the central line of internal thread hole in the installation that makes locking nail in the spacing butt joint of mating end. The limit body and the limit rotation stop of the matching end are realized in various modes, such as a clamping groove, a clamping body, a limit tooth slot and the like.
In one embodiment, the matching end is provided with a rotation stopping groove, and the limiting body is provided with a rotation stopping protrusion;
or the matching end is provided with a rotation stopping bulge, and the limiting body is provided with a rotation stopping groove. Furthermore, the limit block of the limit body of the guide piece and the connecting body of the intramedullary nail is realized by utilizing the cooperation of the rotation stopping groove and the rotation stopping bulge, and the position of the internal thread hole on the fixed body can be adjusted by the guide piece; after the locking nail is installed, the anti-rotation protrusion and the anti-rotation groove can be separated only by reverse movement, so that the clamping and separation of the limiting body and the connecting body are rapid and convenient.
In one embodiment, the center line of the rotation stopping groove of the matching end and the axis of the internal threaded hole are on the same plane, and the center line of the rotation stopping protrusion of the limiting body and the center line of the guiding through hole are on the same plane; or the central line of the rotation stopping bulge of the matching end and the axis of the internal threaded hole are on the same plane, and the central line of the rotation stopping groove of the limiting body and the central line of the guide through hole are on the same plane. Furthermore, as long as the rotation stopping groove is matched with the rotation stopping protrusion in a limiting and rotation stopping way, the center line of the internal threaded hole and the center line of the guide through hole are on the same plane, and the operation is convenient; meanwhile, the position of the opening of the internal threaded hole of the intramedullary nail is set according to the distance between the guide through hole of the sleeve and the limiting body, so that the alignment of the guide through hole and the internal threaded hole is easy to realize.
In one embodiment, the connecting body is provided with a guide protrusion, and the inner wall of the first sleeve joint hole and the inner wall of the second sleeve joint hole are respectively provided with a guide groove in sliding fit with the guide protrusion;
or the inner walls of the first sleeving holes and the second sleeving holes are provided with guide protrusions, and the connecting body is provided with guide grooves which are in sliding fit with the guide protrusions. And the connecting body can only move along the preset direction by utilizing the cooperation of the guide protrusion and the guide groove, and the connecting body can be prevented from rotating.
In one embodiment, the connecting body is further provided with a rack structure, the first sleeve joint hole and the second sleeve joint hole are internally provided with transmission gears meshed with the rack structure, and the input ends of the transmission gears are arranged in the corresponding first matching holes or second matching holes. And then the extension and contraction of the fixed body can be realized by rotationally driving the transmission gear, so that the transmission gear can be conveniently rotated by being matched with the input shaft of the transmission gear through a specific wrench, and the operation is convenient.
In one embodiment, the end face of the bone body is provided with a first clamping part which is staggered with the first sleeving hole and the second sleeving hole; or/and the side surface of the bone body is provided with a weight reduction groove which is staggered with the first fastening hole, the first matching hole, the second fastening hole and the second matching hole. The first clamping part is used for forming a yielding space, so that the growth of the affected bone is facilitated, and the bone is embedded into the first clamping part, so that the bone body and the affected bone are fixed more firmly; simultaneously, the weight of the bone body is reduced as much as possible by utilizing the weight reduction groove under the condition of ensuring the structural strength of the bone body, and simultaneously, the bone body is convenient for tissue growth and spreading to be embedded into human tissues.
The technical proposal also provides a production and assembly method of the artificial bone installation mechanism, which comprises the following steps:
obtaining a bone body through a 3D printer according to bone defect data and installation requirements, wherein the bone body is provided with a first sleeve joint hole, a second sleeve joint hole, a first fastening hole, a first matching hole, a second fastening hole and a second matching hole;
inserting a first intramedullary nail with a connecting body and a fixing body into a first sleeve joint hole, and installing a first fastener through a first fastening hole;
inserting a second intramedullary nail with a connecting body and a fixing body into a second sleeve joint hole, and installing a second fastening piece through a second fastening hole;
moving the fixing body of the first intramedullary nail to a first preset position through a first matching hole, fixing the connecting body of the first intramedullary nail by using a first fastener, and fixing the fixing body of the first intramedullary nail by using a fixing part of the first intramedullary nail;
the fixing body of the second intramedullary nail is moved to a second preset position through the second matching hole, the connecting body of the second intramedullary nail is fixed by the second fastening piece, and the fixing body of the second intramedullary nail is fixed by the fixing part of the second intramedullary nail.
By utilizing the production and assembly method, the bone body can be printed out quickly, and the mounting mechanism can be assembled quickly; furthermore, the bone defect treatment can be rapidly implemented for the patient, which is beneficial to shortening the recovery time of the bone function and accelerating the recovery self-care ability of the patient; in addition, in the operation process, only the defect part with bones is needed to be cut, thereby reducing the wound area and accelerating the healing after the operation.
Drawings
FIG. 1 is a schematic view of an artificial bone mounting mechanism in one embodiment;
FIG. 2 is an exploded view of the structure of FIG. 1;
FIG. 3 is a schematic view of the bone body of FIG. 1;
FIG. 4 is a schematic view of the intramedullary nail of FIG. 1;
FIG. 5 is a schematic view of an artificial bone mounting mechanism according to another embodiment;
FIG. 6 is a schematic view of the guide of FIG. 5;
FIG. 7 is a schematic view of an artificial bone mounting mechanism according to still another embodiment;
FIG. 8 is a schematic view of the intramedullary nail of FIG. 7;
FIG. 9 is a schematic view of a bone body according to another embodiment;
fig. 10 is a schematic view of an application of the mounting mechanism.
Reference numerals illustrate:
10. the bone fracture fixation device comprises a mounting mechanism, 100, a bone body, 110, a first sleeve joint hole, 112, a first fastening hole, 114, a first matching hole, 120, a second sleeve joint hole, 122, a second fastening hole, 124, a second matching hole, 130, a first clamping part, 140, a weight reduction groove, 200, an intramedullary nail, 210, a connecting body, 212, a limiting groove, 214, a rotation stopping groove, 202, a connecting hole, 204, a clamping groove, 216, a rack structure, 220, a fixing body, 221, an internal threaded hole, 223, a locking nail, 225, an introduction part, 300, a fastener, 400, a guide piece, 410, a limiting body, 412, a rotation stopping protrusion, 402, a shaft body, 404, a clamping body, 420, a sleeve, 422, a guide through hole, 500, a guide device, 510, a mounting body, 520, a matching body, 530, a cylinder body, 532, an alignment through hole, 600, a transmission gear, 20 and a bone fracture.
Detailed Description
The present invention will be further described in detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" in this specification do not denote a particular quantity or order, but rather are used for distinguishing between similar or identical items.
As shown in fig. 1 to 4, the installation mechanism 10 of the artificial bone in one embodiment includes a bone body 100, wherein the bone body 100 is provided with a first socket hole 110 and a second socket hole 120, the first socket hole 110 and the second socket hole 120 are arranged at intervals on two end surfaces of the bone body 100, the bone body 100 is also provided with a first fastening hole 112 and a first matching hole 114 which penetrate through the side wall of the first socket hole 110 and a second fastening hole 122 and a second matching hole 124 which penetrate through the side wall of the second socket hole 120, the first fastening hole 112 and the second fastening hole 122 are arranged at intervals on two ends of the bone body 100, and the first matching hole 114 and the second matching hole 124 are arranged between the first fastening hole 112 and the second fastening hole 122 at intervals; the connecting assembly comprises two intramedullary nails 200, wherein the intramedullary nails 200 comprise a connecting body 210 and a fixing body 220 which are movably arranged in a first sleeving hole 110 or a second sleeving hole 120, one end of the connecting body 210 is fixed with one end of the fixing body 220, and the fixing body 220 is provided with a fixing part; and the fastening assembly comprises two fasteners 300, the two fasteners 300 are in one-to-one correspondence with the two intramedullary nails 200, the pressing ends of the fasteners 300 can penetrate through the first fastening holes 112 or the second fastening holes 122 to be pressed and fixed with the connecting body 210, and the fixing bodies 220 of the corresponding intramedullary nails 200 are protruded and fixed at the end parts of the bone body 100.
As shown in fig. 1 to 4 and 10, when the above-mentioned artificial bone installation mechanism 10 is applied to bone defect treatment, according to the actual bone defect amount and the actual installation requirement of a patient, the 3D printer is used to print the bone body 100 required by the patient, the two intramedullary nails 200 are respectively inserted into the first sleeve hole 110 and the second sleeve hole 120, the positions of the two intramedullary nails 200 are adjusted, and the two intramedullary nails can completely enter the bone body 100; then, the bone body 100 is placed at the bone defect position, the first matching hole 114 and the second matching hole 124 are utilized, the two intramedullary nails 200 can move along opposite directions through the expanding mechanism or the driving mechanism, the fixing bodies 220 are embedded into the intramedullary cavities, when the fixing bodies 220 reach the proper positions, the two fasteners 300 are respectively locked, the pressing ends of the fasteners 300 are pressed and fixed with the connecting bodies 210, the fixing bodies 220 of the corresponding intramedullary nails 200 are protruded and fixed in the intramedullary cavities, and the bone body 100 is fixed on the affected bone through the fixing parts, so that the intramedullary nails 200 cannot shift in the fixing mode, and the fixation of the bone body 100 is firmer. The artificial bone mounting mechanism 10 can quickly construct a required defective section bone through 3D printing according to the actual bone defect quantity of a patient, is beneficial to shortening the bone function recovery time and accelerating the recovery self-care ability of the patient; simultaneously, the intramedullary nail 200 can be placed in the bone body 100, and the bone body 100 is fixed on the affected bone in a way of expanding towards two sides, so that in the operation process, only the defect part of the affected bone is required to be cut, the wound area is reduced, and the healing after the operation is quickened.
It should be noted that the fixing portion of the fixing body 220 may be implemented in various manners, such as an expansion nail, a barbed nail, a screw, a buckle, etc.
As shown in fig. 1 to 4, on the basis of the above embodiment, the connector 210 is slidably matched with the first socket hole 110 or the second socket hole 120, and a limit groove 212 which is in limit fit with the pressing end of the fastener 300 is formed on the side wall of the connector 210. The intramedullary nail 200 is further placed in the first socket hole 110 of the bone body 100, the fastener 300 is screwed in through the first fastening hole 112, or the intramedullary nail 200 is placed in the second socket hole 120 of the bone body 100, the fastener 300 is screwed in through the second fastening hole 122, so that the pressing end of the fastener 300 forms a limit fit with the limit groove 212, and the intramedullary nail 200 can slide within a preset range of the bone body 100 but cannot be separated from the bone body 100.
As shown in fig. 4 to 6, on the basis of any one of the above embodiments, the other end of the connector 210 is provided with a mating end, the fixing portion includes an internal threaded hole 221 and a locking pin 223 fixedly connected with the internal threaded hole 221, the mounting mechanism 10 further includes a guide 400, one end of the guide 400 is provided with a limiting body 410, the other end of the guide 400 is provided with a sleeve 420, the sleeve 420 is provided with a guide through hole 422, and the guide through hole 422 is arranged towards the limiting body 410; the limiting body 410 is inserted into the first mating hole 114 or the second mating hole 124 and is limited and abutted against the corresponding mating end, so that the center line of the guide through hole 422 and the center line of the internal threaded hole 221 are on the same straight line. The locking pin 223 can be accurately inserted into the internal threaded hole 221 of the intramedullary nail 200 through the guide 400, and the bone body 100 can be fixed with the affected bone through the cooperation of the locking pin with the internal threaded hole 221; specifically, the limiting body 410 of the guide 400 is inserted into the first mating hole 114 or the second mating hole 124 and is in limiting abutment with the corresponding mating end, so that the center line of the guide through hole 422 and the center line of the internal threaded hole 221 are in the same straight line, and the locking nail 223 can be screwed into the corresponding internal threaded hole 221 through the guide through hole 422, so that the bone body 100 is fixedly connected with the affected bone, and in this process, the limiting body 410 is in limiting abutment with the mating end, so that the center line of the guide through hole 422 and the center line of the internal threaded hole 221 are always in the same straight line in the installation process of the locking nail 223. The limit body 410 and the limit stop at the mating end can be implemented in various manners, such as a slot 204 and a body 404, and a limit tooth slot. Further, as shown in fig. 4 and 6, the engaging end is provided with a rotation stopping groove 214, and the limiting body 410 is provided with a rotation stopping protrusion 412; or equivalently, the matching end is provided with a rotation stopping bulge, and the limiting body is provided with a rotation stopping groove; further, the stop body 410 of the guide 400 is engaged with the connector 210 of the intramedullary nail 200 by the cooperation of the stop groove and the stop protrusion 412, so that the position of the internal thread hole 221 on the fixed body 220 can be adjusted by the guide 400; after the locking nail 223 is installed, the anti-rotation protrusion and the anti-rotation groove can be separated only by reverse movement, so that the locking and separating of the limiting body 410 and the connecting body 210 are rapid and convenient. Still further, the center line of the rotation stopping groove 214 of the mating end is on the same plane with the axis of the internal threaded hole 221, and the center line of the rotation stopping protrusion 412 of the limiting body 410 is on the same plane with the center line of the guiding through hole 422; or the center line of the rotation stopping protrusion 412 of the mating end is on the same plane as the axis of the internal threaded hole 221, and the center line of the rotation stopping groove 214 of the limiting body 410 is on the same plane as the center line of the guide through hole 422. Furthermore, as long as the rotation stopping groove 214 is matched with the rotation stopping protrusion 412 in a limiting and rotation stopping way, the center line of the internal threaded hole 221 and the center line of the guide through hole 422 are on the same plane, and the operation is convenient; meanwhile, the hole opening position of the internal thread hole 221 of the intramedullary nail 200 is set according to the distance between the guide through hole 422 of the sleeve 420 and the limiting body 410, so that the alignment of the guide through hole 422 and the internal thread hole 221 is easy to realize, the accuracy of operation is further improved, the dependence on the operation experience of doctors is reduced, and the popularization of bone defect operation is facilitated. The specific structure of the guide 400 may be varied, so long as the axis (center line) of the guide through hole 422 and the center line of the rotation stop protrusion 412 are in the same plane, and the distance between them can be set according to the position of the opening of the internal threaded hole 221 of the intramedullary nail 200.
Specifically, the rotation stopping groove 214 includes a connecting hole 202 disposed at the mating end and a clamping groove 204 disposed on a side wall of the connecting hole 202, where a center line of the clamping groove 204 and an axis of the third fastener 300 are on the same plane; the rotation stopping protrusion 412 comprises a shaft body 402 matched with the connecting hole 202 and a clamping body 404 protruding outside the shaft body 402, the central line of the clamping body 404 and the axis of the guiding through hole 422 are on the same plane, and the clamping body 404 is clamped with the clamping groove 204; when the clamping is needed, the position of the limiting body 410 of the guide piece 400 is adjusted, so that the clamping body 404 is opposite to the clamping groove 204, the shaft body 402 is opposite to the connecting hole 202, the limiting body 410 of the guide piece 400 is pushed towards the intramedullary nail 200, namely, the clamping body 404 can be pushed into the clamping groove 204, the shaft body 402 is pushed into the connecting hole 202 to form anti-rotation clamping, and the anti-rotation clamping is pushed to the limit position, so that the axial line of the guide through hole 422 is aligned with the axial line of the internal threaded hole 221; after the locking nail 223 is installed, the limit body 410 is only required to be pulled out in the opposite direction, so that the rapid assembly and separation of the matching end of the connector 210 and the limit body 410 are realized, and the locking nail is applied to bone defect surgery, and compared with the existing surgery mode, the surgery efficiency is greatly improved; the structure has high manufacturing precision, low cost and convenient popularization. The free end of the fixed body 220 is further provided with an introduction portion 225, and the introduction portion 225 has a cone shape or a hemispherical shape, so as to facilitate guiding insertion into the medullary cavity of the afflicted bone.
On the basis of the above embodiment, the connector 210 is provided with a guiding protrusion, and the inner wall of the first sleeving hole 110 and the inner wall of the second sleeving hole 120 are provided with guiding grooves in sliding fit with the guiding protrusion; or the inner walls of the first sleeving hole 110 and the second sleeving hole 120 are provided with guide protrusions, and the connector 210 is provided with guide grooves in sliding fit with the guide protrusions. And then the cooperation of usable direction protruding and guiding groove makes connector 210 only follow the direction that presets and can prevent that connector 210 from rotating for the counterpoint of direction through-hole 422 and internal thread hole 221 is more reliable, can avoid other maloperation to lead to the position of two different, needs repeated counterpoint, is unfavorable for reducing operation time.
In another embodiment, as shown in fig. 7 and 8, the connecting body 210 is further provided with a rack structure 216, the first socket hole 110 and the second socket hole 120 are respectively provided with a transmission gear 600 meshed with the rack structure 216, and an input end of the transmission gear 600 is disposed in the corresponding first matching hole 114 or second matching hole 124. And further, the extension and contraction of the fixed body 220 can be realized by rotationally driving the transmission gear 600, so that the transmission gear 600 can be conveniently rotated by being matched with the input shaft of the transmission gear 600 through a specific wrench, the operation is convenient, and a more-than-one expanding scheme of the intramedullary nail 200 is provided for bone defect surgery treatment. Further, the installation mechanism 10 further includes a guiding device 500, where the guiding device 500 includes an installation body 510, two matching bodies 520 disposed on the matching surfaces of the installation body 510, and a cylinder 530 rotatably disposed on the installation body 510, the matching surfaces of the installation body 510 can be matched with the outer surface of the bone body 100, the two matching bodies 520 are respectively sleeved with the input ends of the two transmission gears 600, the cylinder 530 is provided with an alignment through hole 532, and the alignment through hole 532 of the cylinder 530 can correspond to the internal threaded hole 221 of the intramedullary nail 200. The guide 500 is used to further enhance a positioning scheme for aligning the locking pin 223 with the internally threaded bore 221 of the intramedullary nail 200.
In addition, the first mating hole 114 and the second mating hole 124 are bar-shaped holes, or the first mating hole 114 or the second mating hole 124 are communicated to form bar-shaped holes; the bar-shaped hole can be used to facilitate the insertion of the stopper 410 of the guide 400 into the bone body 100; and further, it is convenient to use the distraction clamp to distract the two intramedullary nails 200 so that the fixation bodies 220 of the intramedullary nails 200 are embedded in the bone marrow cavity.
On the basis of the above embodiment, as shown in fig. 9, the end surface of the bone body 100 is provided with a first clamping portion 130 which is staggered with the first socket hole 110 and the second socket hole 120; or/and the side surface of the bone body 100 is provided with a weight-reducing groove 140 which is staggered with the first fastening hole 112, the first matching hole 114, the second fastening hole 122 and the second matching hole 124. The first clamping part 130 is used for forming a yielding space or a buckling space, so that the bone growth is facilitated, and the bone body 100 and the bone are firmly fixed by embedding the yielding space or the buckling space; meanwhile, the weight of the bone body 100 is reduced as much as possible by using the weight-reducing groove 140 under the condition of ensuring the structural strength of the bone body 100, and meanwhile, the bone body 100 is conveniently embedded into human tissues by tissue growth and spreading. Further, the bone body 100 may be made of biocompatible materials (e.g., titanium alloy, cobalt-chromium-molybdenum alloy, etc.), so that no rejection occurs after surgery, which is beneficial for healing at the implant-bone bed interface. Specifically, the first clamping portion is a clamping groove, so that the bone growth is facilitated, and the first clamping portion is embedded into the clamping groove, so that the bone body 100 and the bone are more firmly fixed.
In another embodiment, a method of manufacturing and assembling the artificial bone mounting mechanism 10 is provided, comprising the steps of:
(1) According to the bone defect data and the installation requirement, obtaining a bone body 100 through a 3D printer, wherein the bone body 100 is provided with a first sleeve joint hole 110, a second sleeve joint hole 120, a first fastening hole 112, a first matching hole 114, a second fastening hole 122 and a second matching hole 124;
(2) Inserting a first intramedullary nail (i.e., one intramedullary nail 200) having a connecting body 210 and a fixing body 220 into the first socket hole 110, and installing a first fastener 300 through the first fastening hole 112;
(3) Inserting a second intramedullary nail (i.e., another intramedullary nail 200) having a connecting body 210 and a fixing body 220 into the second socket hole 120, and installing a second fastener 300 through the second fastening hole 122;
(4) Moving the fixation body 220 of the first intramedullary nail to a first preset position through the first fitting hole 114, fixing the connection body 210 of the first intramedullary nail with the first fastener 300, and fixing the fixation body 220 of the first intramedullary nail with the fixation portion of the first intramedullary nail;
(5) The fixing body 220 of the second intramedullary nail is moved to a second preset position through the second fitting hole 124, the connecting body 210 of the second intramedullary nail is fixed by the second fastener 300, and the fixing body 220 of the second intramedullary nail is fixed by the fixing portion of the second intramedullary nail.
By using the above production and assembly method, the bone body 100 can be printed out quickly, and the mounting mechanism 10 can be assembled quickly; furthermore, the bone defect treatment can be rapidly implemented for the patient, which is beneficial to shortening the recovery time of the bone function and accelerating the recovery self-care ability of the patient; in addition, in the operation process, only the defect part with bones is needed to be cut, thereby reducing the wound area and accelerating the healing after the operation.
The bone defect data can be obtained by the prior art, such as CT fault technology, or related data can be called from a stored large database; the installation requirement can be designed according to the characteristics of the affected bone.
It should be noted that, the steps (2) and (3) are not sequential, and can be performed simultaneously or one of them is first; the steps (4) and (5) are not sequential, and can be performed simultaneously or one of them is first; step (4) can be performed after step (2) is completed, and step (5) can be performed after step (3) is completed
In the steps (4) and (5), when the first intramedullary nail is fixed, or when the second intramedullary nail is fixed, the method further comprises using the guide 400 to fix the first intramedullary nail fixing body 220 by using the locking nail 223 and the guide through hole 422 of the guide 400 and the first intramedullary nail internal threaded hole 221, or to fix the second intramedullary nail fixing body 220 by using the locking nail 223 and the guide through hole 422 of the guide 400 and the second intramedullary nail internal threaded hole 221.
In step (2), the method further comprises respectively inserting the first intramedullary nails into the first socket holes 110 after processing the internal threaded holes 221 at the preset positions of the first intramedullary nails according to the installation requirements; in step (3), the method further comprises machining the internal threaded holes 221 at the preset positions of the second intramedullary nails according to the installation requirements, and inserting the second intramedullary nails into the second socket holes 120. Thereby facilitating the locking by the locking nail and fixing the first intramedullary nail and the second intramedullary nail at the affected bone.
It should be noted that the above production and assembly method is not a treatment method of bone surgery, and the implementation of the method is not dependent on the surgical procedure, but only to protect a manufacturing method of the bone body 100 and an assembly method of the bone body 100 and related accessories.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. An artificial bone mounting mechanism comprising:
the bone body is provided with a first sleeving hole and a second sleeving hole, the first sleeving hole and the second sleeving hole are arranged at two end faces of the bone body at intervals, the bone body is also provided with a first fastening hole and a first matching hole which penetrate through the side wall of the first sleeving hole and a second fastening hole and a second matching hole which penetrate through the side wall of the second sleeving hole, the first fastening hole and the second fastening hole are arranged at two ends of the bone body at intervals, and the first matching hole and the second matching hole are arranged between the first fastening hole and the second fastening hole at intervals;
the connecting assembly comprises two intramedullary nails, the intramedullary nails comprise a connecting body and a fixing body, the connecting body and the fixing body are movably arranged in the first sleeving holes or the second sleeving holes, one end of the connecting body is fixed with one end of the fixing body, the fixing body is provided with a fixing part for fixing the bone body on a patient bone, the two intramedullary nails are respectively inserted into the first sleeving holes and the second sleeving holes, and the two intramedullary nails can completely enter the bone body, wherein the two intramedullary nails can move in opposite directions through a spreading mechanism or a driving mechanism by utilizing the first matching holes and the second matching holes; a kind of electronic device with high-pressure air-conditioning system
The fastening assembly comprises two fasteners, the two fasteners correspond to the two intramedullary nails one by one, the pressing ends of the fasteners can penetrate through the first fastening holes or the second fastening holes to be pressed and fixed with the connecting body, and the corresponding fixing bodies of the intramedullary nails are protruded and fixed at the end parts of the bone body.
2. The mounting mechanism of claim 1, wherein the connector is slidably engaged with the first socket hole or the second socket hole, and a side wall of the connector is provided with a limit groove forming a limit engagement with a pressing end of the fastener.
3. The mounting mechanism according to claim 1, wherein the other end of the connecting body is provided with a mating end, the fixing portion comprises an internal threaded hole and a locking nail fixedly connected with the internal threaded hole, the mounting mechanism further comprises a guide member, one end of the guide member is provided with a limit body, the other end of the guide member is provided with a sleeve, the sleeve is provided with a guide through hole, and the guide through hole is arranged towards the limit body; the limiting body is inserted into the first matching hole or the second matching hole and is in limiting abutment with the corresponding matching end, so that the center line of the guide through hole and the center line of the internal threaded hole are in the same straight line.
4. A mounting mechanism according to claim 3, wherein the mating end is provided with a rotation stopping groove and the limit body is provided with a rotation stopping protrusion;
or the matching end is provided with a rotation stopping bulge, and the limiting body is provided with a rotation stopping groove.
5. The mounting mechanism according to claim 4, wherein a center line of the rotation stopping groove of the mating end is on the same plane as an axis of the internal threaded hole, and a center line of the rotation stopping protrusion of the stopper body is on the same plane as a center line of the guide through hole; or the central line of the rotation stopping bulge of the matching end and the axis of the internal threaded hole are on the same plane, and the central line of the rotation stopping groove of the limiting body and the central line of the guide through hole are on the same plane.
6. The mounting mechanism according to claim 1, wherein the connecting body is provided with a guide protrusion, and the inner wall of the first sleeve joint hole and the inner wall of the second sleeve joint hole are provided with guide grooves which are in sliding fit with the guide protrusion;
or the inner walls of the first sleeving holes and the second sleeving holes are provided with guide protrusions, and the connecting body is provided with guide grooves which are in sliding fit with the guide protrusions.
7. The mounting mechanism of claim 1, wherein the connecting body is further provided with a rack structure, transmission gears meshed with the rack structure are respectively arranged in the first sleeve joint hole and the second sleeve joint hole, and input ends of the transmission gears are arranged in the corresponding first matching holes or the second matching holes.
8. The mounting mechanism according to any one of claims 1 to 7, wherein an end face of the bone body is provided with a first clip portion that is offset from the first and second socket holes; or/and the side surface of the bone body is provided with a weight reduction groove which is staggered with the first fastening hole, the first matching hole, the second fastening hole and the second matching hole.
9. The mounting mechanism according to any one of claims 1 to 7, wherein the first fastening hole and the second fastening hole are both of an internally threaded hole structure, and the fastener is provided with a screw-fitted with the internally threaded hole structure and a pressing body pressing against the connecting body.
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| CN201711387098.0A CN109938881B (en) | 2017-12-20 | 2017-12-20 | Artificial bone mounting mechanism |
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| CN201711387098.0A CN109938881B (en) | 2017-12-20 | 2017-12-20 | Artificial bone mounting mechanism |
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| CN109938881B true CN109938881B (en) | 2023-08-01 |
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| CN115399860A (en) * | 2022-07-04 | 2022-11-29 | 广州赛隆增材制造有限责任公司 | Medical internal fixing device |
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| US7125423B2 (en) * | 2003-03-31 | 2006-10-24 | Depuy Products, Inc. | Intercalary prosthesis, kit and method |
| DE102008045291B4 (en) * | 2008-09-02 | 2013-05-02 | Merete Medical Gmbh | Knee arthrodesis implant |
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| EP0212192A1 (en) * | 1985-08-09 | 1987-03-04 | Waldemar Link (GmbH & Co.) | Endoprosthesis for the replacement of the middle portion of a long bone |
| US5352227A (en) * | 1993-02-03 | 1994-10-04 | Howmedica Inc. | Intercalary device |
| US6454810B1 (en) * | 1996-08-16 | 2002-09-24 | Guenter Lob | Endoprosthesis |
| CN201524153U (en) * | 2009-11-17 | 2010-07-14 | 孙平 | Limb middle-piece marrow internal lock |
| CN101843519A (en) * | 2010-05-18 | 2010-09-29 | 东人 | Novel cervical vertebra dynamic internal fixing device |
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