CN117717443B - Positioning device and positioning system for unicondylar prosthesis replacement - Google Patents
Positioning device and positioning system for unicondylar prosthesis replacement Download PDFInfo
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- CN117717443B CN117717443B CN202410176407.3A CN202410176407A CN117717443B CN 117717443 B CN117717443 B CN 117717443B CN 202410176407 A CN202410176407 A CN 202410176407A CN 117717443 B CN117717443 B CN 117717443B
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- 210000000689 upper leg Anatomy 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000003780 insertion Methods 0.000 claims description 24
- 230000037431 insertion Effects 0.000 claims description 24
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 230000013011 mating Effects 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 12
- 210000002303 tibia Anatomy 0.000 description 7
- 230000000149 penetrating effect Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 210000000988 bone and bone Anatomy 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 206010023203 Joint destruction Diseases 0.000 description 1
- 208000003947 Knee Osteoarthritis Diseases 0.000 description 1
- 208000037099 Prosthesis Failure Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 201000008482 osteoarthritis Diseases 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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- Prostheses (AREA)
Abstract
The embodiment of the invention provides a positioning device for single-condyle prosthesis replacement. Wherein, the positioning device main body part and the positioning block of the unicondylar prosthesis replacement. The depth of the main body part is limited by a limiting groove extending along a first preset direction; the locating piece is followed the inboard position of inserting and the outside position of inserting that the orientation had relative setting in the first direction of predetermining, the axis of first locating hole intersects with the axis of second locating hole, on the inboard position of inserting, interval between first locating hole and the second locating hole is followed the tank bottom of spacing groove reduces to the direction of notch, on the outside position of inserting, interval between first locating hole and the second locating hole is along the tank bottom of spacing groove to the direction of notch increase, the inboard position of inserting and the outside position of inserting of locating piece alternately block locate in the spacing groove to cooperate the location of the medial side of femur and the femoral outside in the unicondylar prosthesis replacement process. Therefore, the positioning device according to the embodiment of the invention has the advantages of simplifying the positioning device and reducing the risk of wrong positioning.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a positioning device and a positioning system for single-condyle prosthesis replacement.
Background
With aging population, knee osteoarthritis patients increase year by year, wherein patients with heavy joint destruction need pain relief and knee function improvement through joint replacement surgery. To replace the unicondylar prosthesis, the surgeon needs to resect a sufficient portion of the femur from the surface of the tibia and femur, and then accurately install the femoral prosthesis and tibial prosthesis to replace the resected portion by the surgeon. The precise prosthesis installation location directly affects the surgical outcome and post-prosthesis survival rate.
In the related art, when the unicondylar femur is replaced, the femoral prosthesis is required to be positioned firstly, the replacement prosthesis instrument is matched with a matched positioning instrument, the optimal femoral prosthesis installation position is found according to the positioning instrument, and then two positioning holes are drilled, so that the fixed replacement prosthesis position is obtained.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, embodiments of the present invention provide a unicondylar prosthesis replacement positioning device. The positioning device has the advantages of simplifying the positioning device, improving the convenience of operation and reducing the risk of error in the direction of the inner side and the outer side during operation.
The embodiment of the invention also provides a positioning system for the unicondylar prosthesis replacement.
The positioning device for the unicondylar prosthesis replacement comprises a main body piece and a positioning block.
The main body piece is provided with a guide hole and a limiting groove with depth extending along a first preset direction, and the axial direction of the guide hole and the first preset direction have a preset included angle; the positioning block is provided with a first positioning hole and a second positioning hole which are oppositely arranged along the first preset direction, the positioning block is provided with a first positioning hole and a second positioning hole which are used for inserting a positioning needle, the first positioning hole and the second positioning hole are arranged in an extending mode along the direction perpendicular to the thickness direction of the positioning block, the first positioning hole and the second positioning hole are arranged at intervals along the second preset direction perpendicular to the first preset direction, the axes of the first positioning hole and the second positioning hole are intersected, on the inner side insertion position, the distance between the first positioning hole and the second positioning hole is reduced along the direction from the bottom of the limiting groove to the notch, on the outer side insertion position, the distance between the first positioning hole and the second positioning hole is increased along the direction from the bottom of the limiting groove to the notch, and the inner side insertion position and the outer side insertion position of the positioning block are alternatively clamped in the limiting groove so as to match with the positioning of the inner side and the femur in the femoral bone replacement process of the unicompartment prosthesis.
According to the positioning device for replacing the unicondylar prosthesis, the mounting direction of the positioning block is changed, so that the extending directions of the first positioning hole and the second positioning hole are changed, the positioning of the inner side and the outer side of the femur in the unicondylar prosthesis replacement process is matched, once the mounting positions (the inner side insertion position and the outer side insertion position) of the positioning block are selected, the positioning holes are not needed to be selected in the operation process, the risk of error in the inner side and the outer side direction in the operation selection is reduced, and the problem that the unicondylar prosthesis replacement is positioned incorrectly is avoided. The risk of wrong direction of the inner side and the outer side in the operation process can be reduced only by pre-installing the positioning blocks by an assistant, and the surgical operation device has the advantages of high use convenience and low risk of errors.
In addition, the positioning device for the unicondylar prosthesis replacement can simultaneously meet the requirements of inner and outer side positioning by adopting the same instrument, and reduce the number of the positioning instruments while achieving accurate positioning, thereby reducing the operation requirements of operators. Therefore, the positioning device has the advantage of saving the purchase cost of the positioning instrument.
Therefore, the positioning device for replacing the unicondylar prosthesis has the advantages of simplifying the positioning device, improving the convenience of operation and reducing the risk of wrong medial and lateral directions in operation selection.
In some embodiments, one of a limit protrusion and a limit recess is provided on the wall of the limit groove, the other of the limit protrusion and the limit recess is provided on the positioning block, and the limit protrusion is clamped in the limit recess.
In some embodiments, one of the positioning block and the main body member is provided with a stop projection capable of abutting against the other of the positioning block and the main body member so as to position the mounting position of the positioning block.
In some embodiments, the limiting protrusion extends along the second preset direction, and the stop protrusion is disposed at one side of the extending direction of the limiting protrusion.
In some embodiments, the positioning device for unicondylar prosthesis replacement further comprises a limiting member, wherein the limiting member is connected to the main body member, and a portion of the limiting member abuts the positioning block so as to prevent the positioning block from being separated from the main body member.
In some embodiments, the limiting piece includes a clamping portion and a limiting portion that are connected, the clamping portion is U-shaped, the clamping portion is clamped outside the main body piece, the limiting portion is connected with a U-shaped side of the clamping portion, and the limiting portion abuts against the positioning block so as to prevent the positioning block from falling out of the main body piece.
In some embodiments, the positioning block comprises a first limiting section, a positioning main body section and a second limiting section which are sequentially arranged, the first limiting section and the second limiting section are oppositely arranged along a first preset direction, each of the first limiting section and the second limiting section and the positioning main body section form a step part, the limiting parts can be alternatively clamped outside the first limiting section and the second limiting section, the limiting parts can be abutted with the positioning main body section, and the first positioning holes and the second positioning holes are respectively arranged on two sides of the positioning main body section.
In some embodiments, the body member has a positioning member and the stop portion has a mating portion, the positioning member and the mating portion being removably connected so that the stop member can be removed from the body member.
In some embodiments, the limiting member further comprises a positioning member and an elastic compression member, the main body member is provided with a mounting groove and a mounting hole, the U-shaped side edge of the clamping portion is clamped on the main body member, the positioning member is connected with the U-shaped side edge of the clamping portion, the positioning member is slidably arranged in the mounting groove along the axial direction of the guide hole, the positioning member and the U-shaped bottom edge of the clamping portion are oppositely arranged, a part of the elastic compression member is arranged in the mounting hole in a penetrating manner, and two ends of the elastic compression member are respectively abutted to the positioning member and the main body member.
In some embodiments, the limiting portion has a first abutment surface and a second abutment surface disposed opposite to each other along the second preset direction, a distance between the first abutment surface and the second abutment surface increases along a direction from a groove bottom of the limiting groove to a groove opening so as to form a tapered positioning groove, and each of the first limiting section and the second limiting section is tapered and convex, and the tapered protrusion is fitted in the positioning groove.
In some embodiments, the main body member includes a supporting main body, a height block and an adjusting member, the supporting main body and the height block are sequentially arranged along the height direction of the positioning device, the supporting main body and the height block are arranged at an adjustable distance between the supporting main body and the height block in the height direction of the positioning device, the supporting main body is provided with a long slot hole with a length along the height direction of the positioning device, the adjusting member is arranged in the long slot hole in a penetrating manner, and the adjusting member is connected with the height block.
In some embodiments, the inboard plug and/or the outboard plug have orientation indication indicia.
In some embodiments, the guide hole includes a first guide hole and a second guide hole that are disposed in parallel, and the first guide hole and the second guide hole are disposed on two sides of the limit groove along a height direction of the positioning device.
In some embodiments, the support body includes a support portion and a fixing plate that are connected, the fixing plate extends along a height direction of the positioning device, the elongated slot is formed in the fixing plate, the height block includes a height adjusting portion and an adjusting engagement portion, the height adjusting portion and the support portion are disposed opposite to each other along the height direction of the positioning device, the fixing plate has a first tooth portion, the adjusting engagement portion has a second tooth portion, the first tooth portion and the second tooth portion are engageable, and the adjusting engagement portion is in threaded engagement with the adjusting member to control engagement of the first tooth portion and the second tooth portion.
The positioning system of the unicondylar prosthesis replacement according to an embodiment of the present invention comprises a positioning needle and a positioning device of the unicondylar prosthesis replacement according to any of the above.
Drawings
FIG. 1 is a perspective view of a positioning device for unicondylar prosthetic replacement according to an embodiment of the present invention.
FIG. 2 is another perspective view of a unicondylar prosthetic replacement positioning device according to an embodiment of the invention.
Fig. 3 is a perspective view of a positioning block removal body member according to an embodiment of the present invention.
FIG. 4 is another perspective view of a unicondylar prosthetic replacement positioning device according to an embodiment of the invention.
Fig. 5 is an exploded view of a positioning device for unicondylar prosthetic replacement in accordance with an embodiment of the present invention.
Fig. 6 is a schematic structural view of a body member according to an embodiment of the present invention.
Fig. 7 is a schematic view of the cooperation of the limiting member and the positioning block according to the embodiment of the present invention.
Reference numerals:
A positioning device 100;
A body member 1; a support body 11; a support portion 111; a limit groove 1111; limit recess 1112; a guide hole 1113;
A fixing plate 112; a first tooth 1121;
a height block 12; a height adjusting section 121; an adjustment fitting 122; a second tooth 1221;
An adjusting member 13;
A positioning block 2; a first positioning hole 21; a second positioning hole 22; a limit projection 23; stop bosses 24; an azimuth indication mark 25;
A first limit section 201; positioning the body section 202; a second limit segment 203;
a limiting member 3; an engaging portion 31; a stopper 32; a first abutment surface 321; a second abutment surface 322;
A positioning member 33; an elastic compression member 34.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The following describes a unicondylar prosthetic replacement positioning device 100 in accordance with an embodiment of the present invention with reference to fig. 1-7.
The positioning device 100 for unicondylar prosthesis replacement according to an embodiment of the present invention includes a main body member 1 and a positioning block 2.
The main body 1 is provided with a guide hole 1113 and a limit groove 1111 with a depth extending along a first preset direction, wherein the axial direction of the guide hole 1113 has a preset included angle with the first preset direction; the positioning block 2 has an inner insertion position and an outer insertion position which are oppositely arranged along a first preset direction, the positioning block 2 has a first positioning hole 21 and a second positioning hole 22 for inserting a positioning needle, the first positioning hole 21 and the second positioning hole 22 are arranged in an extending manner along a direction perpendicular to the thickness direction of the positioning block 2, the first positioning hole 21 and the second positioning hole 22 are arranged at intervals along a second preset direction perpendicular to the first preset direction, the axes of the first positioning hole 21 and the second positioning hole 22 intersect, on the inner insertion position, the distance between the first positioning hole 21 and the second positioning hole 22 is reduced along the direction from the bottom of the limit groove 1111 to the notch, on the outer insertion position, the distance between the first positioning hole 21 and the second positioning hole 22 is increased along the direction from the bottom of the limit groove 1111 to the notch of the femur, and the inner insertion position and the outer insertion position of the positioning block 2 are alternatively clamped in the limit groove 1111 to match with the positioning of the inner femur and the outer femur in the single condyle prosthesis replacement process.
According to the positioning device 100 for replacing the unicondylar prosthesis, the installation direction of the positioning block 2 is changed, so that the extension directions of the first positioning hole 21 and the second positioning hole 22 are changed, the positioning of the inner side and the outer side of the femur in the unicondylar prosthesis replacement process is matched, once the installation position (the inner side insertion position and the outer side insertion position) of the positioning block 2 is selected, the positioning holes (a plurality of positioning holes are arranged in the related art) are not needed to be selected in the operation process, the risk of error in the inner side and the outer side direction in the operation selection is reduced, and the problem that the unicondylar prosthesis replacement is positioned incorrectly is avoided. The risk of wrong direction of the inner side and the outer side in the operation process can be reduced only by pre-installing the positioning block 2 by an assistant, and the surgical operation device has the advantages of high use convenience and low risk of errors.
In addition, the positioning device 100 for replacing the unicondylar prosthesis can simultaneously meet the requirements of inner and outer positioning by adopting the same instrument, and reduce the number of the positioning instruments while achieving accurate positioning, thereby reducing the operation requirements of operators. Thus, the positioning device 100 has the advantage of saving the purchase cost of positioning instruments.
Therefore, the positioning device 100 for unicondylar prosthesis replacement according to the embodiment of the invention has the advantages of simplifying the positioning device 100, improving the convenience of operation and reducing the risk of wrong medial-lateral direction in surgical selection.
Specifically, when the positioning block 2 is mounted in the inner insertion position, the distance between the first positioning hole 21 and the second positioning hole 22 is reduced along the direction from the bottom of the limit groove 1111 to the notch, and extends approximately in an inner "eight" shape, and when the positioning block 2 is mounted in the outer insertion position, the distance between the first positioning hole 21 and the second positioning hole 22 is increased along the direction from the bottom of the limit groove 1111 to the notch, and extends approximately in an outer "eight" shape, so as to satisfy the positioning provided on the inner side of the femur and the outer side of the femur.
For convenience of description, the up-down direction in fig. 1 is hereinafter referred to as the height direction of the positioning device 100, the front-back direction in fig. 1 is referred to as the inside-outside direction of the positioning device 100, and the front-back direction in fig. 1 is referred to as the width direction of the positioning device 100.
As shown in fig. 1, 2, 4 and 5, one of a limiting protrusion 23 and a limiting recess 1112 is provided on the wall of the limiting groove 1111, the other one of the limiting protrusion 23 and the limiting recess 1112 is provided on the positioning block 2, and the limiting protrusion 23 is engaged in the limiting recess 1112. In other words, the groove wall of the limit groove 1111 is provided with a limit protrusion 23, the positioning block 2 is provided with a limit recess 1112, or the groove wall of the limit groove 1111 is provided with a limit recess 1112, and the positioning block 2 is provided with a limit protrusion 23.
The main body 1 and the positioning block 2 in the positioning device 100 for unicondylar prosthesis replacement according to the embodiment of the invention are fixedly matched through the structures of the limiting convex 23 and the limiting concave 1112. The positioning device 100 with the structure has the advantages of simple structure and high structural stability.
Alternatively, the limiting recess 1112 may be a tapered or T-shaped slot to promote the guiding of the mounting engagement of the positioning block 2.
As shown in fig. 4 and 5, a stopper projection 24 is provided on one of the positioning block 2 and the body member 1, and the stopper projection 24 can abut against the other of the positioning block 2 and the body member 1 to position the mounting position of the positioning block 2. In other words, the positioning block 2 is provided with the stopper protrusion 24, the stopper protrusion 24 can be abutted against the body member 1, or the body member 1 is provided with the stopper protrusion 24, and the stopper protrusion 24 can be abutted against the positioning block 2.
According to the positioning device 100 for the unicondylar prosthesis replacement, the main body part 1 and the positioning block 2 limit the position relationship between the positioning block 2 and the main body part 1 through the arranged stop protrusions 24, so that the problem that the positioning block 2 slides off from the limit groove 1111 or is mounted with positioning deviation can be prevented. Thus, the positioning device 100 has the advantage of high structural stability.
For example, as shown in fig. 1, each of the stopper projection 24 and the stopper projection 23 is provided on the upper end surface of the positioning block 2, the body member 1 is provided with the stopper recess 1112, the stopper projection 23 extends in the left-right direction of the positioning device 100, and the stopper projection 24 is provided on the left side or the right side of the stopper projection 23. Further, the main body member 1 may be provided with a relief groove, and the stop projection 24 is disposed in the relief groove. Therefore, the stability of the structure can be further improved through limiting the stop boss 24 and the avoidance groove.
As shown in fig. 1, 2 and 5, the positioning device 100 for replacing a unicondylar prosthesis according to the embodiment of the present invention further includes a limiting member 3, the limiting member 3 is connected to the main body 1, and a portion of the limiting member 3 abuts against the positioning block 2 so as to avoid the problem that the positioning block 2 is separated from the main body 1.
The positioning device 100 for replacing a unicondylar prosthesis according to the embodiment of the present invention is configured to prevent the positioning block 2 from slipping off the main body 1 by abutting a portion of the limiting member 3 against the positioning block 2 (preventing the positioning block 2 from slipping off the main body 1 in the second predetermined direction). Thereby, the positioning device 100 further improves the installation stability of the positioning block 2.
Further, the limiting member 3 may be combined with the stop protrusion 24 to enhance structural stability of the positioning block 2.
As shown in fig. 1,2 and 5, the limiting member 3 includes a locking portion 31 and a limiting portion 32, where the locking portion 31 is U-shaped, the locking portion 31 is locked and arranged outside the main body member 1, the limiting portion 32 is connected to the U-shaped side of the locking portion 31, and the limiting portion 32 abuts against the positioning block 2 so as to avoid the problem that the positioning block 2 is separated from the main body member 1.
According to the positioning device 100 for replacing the unicondylar prosthesis, the clamping part 31 of the limiting piece 3 is clamped outside the main body piece 1, so that the connection stability of the limiting piece 3 and the main body piece 1 can be improved, and the convenience of operation is further improved.
As shown in fig. 1, 4 and 5, the positioning block 2 includes a first limiting section 201, a positioning main body section 202 and a second limiting section 203, the first limiting section 201 and the second limiting section 203 are oppositely arranged along a first preset direction, each of the first limiting section 201 and the second limiting section 203 and the positioning main body section 202 form a step part, the limiting part 32 can be alternatively clamped outside the first limiting section 201 and the second limiting section 203, the limiting part 32 can be abutted with the positioning main body section 202, and the first positioning hole 21 and the second positioning hole 22 are respectively arranged at two sides of the positioning main body section 202.
According to the positioning device 100 for replacing the unicondylar prosthesis, each of the first limiting section 201 and the second limiting section 203 and the positioning main body section 202 form the step part, the limiting part 32 can be clamped outside the first limiting section 201 and the second limiting section 203 alternatively, and the limiting part 32 can be abutted with the positioning main body section 202, so that the accuracy of limiting the positioning block 2 by the limiting part 3 can be improved.
As shown in fig. 1 and 5, the positioning device 100 for replacing a unicondylar prosthesis according to the embodiment of the present invention further includes a positioning member 33 and an elastic compression member 34, a mounting groove and a mounting hole are formed in the main body 1, the U-shaped side edge of the engaging portion 31 is clamped on the main body 1, the positioning member 33 is connected to the U-shaped side edge of the engaging portion 31, the positioning member 33 is slidably disposed in the mounting groove along the axial direction of the guide hole 1113 (the front-rear direction of the positioning device 100), the positioning member 33 is disposed opposite to the U-shaped bottom edge of the engaging portion 31, a portion of the elastic compression member 34 is disposed in the mounting hole in a penetrating manner, and two ends of the elastic compression member 34 are respectively abutted against the positioning member 33 and the main body 1.
According to the positioning device 100 for replacing the unicondylar prosthesis, the positioning piece 33 and the elastic compression piece 34 are arranged, the positioning piece 33 is slidably arranged in the mounting groove along the front-back direction of the positioning device 100, the positioning piece 33 is opposite to the U-shaped bottom edge of the clamping part 31, a part of the elastic compression piece 34 is arranged in the mounting hole in a penetrating mode, and two ends of the elastic compression piece 34 are respectively abutted to the positioning piece 33 and the main body piece 1. Therefore, when the inner inserting position and the outer inserting position of the positioning block 2 need to be changed, the positioning piece 33 and the limiting piece 3 can be moved together by compressing the elastic compression piece 34, so that the convenience of operation is improved, and after the positioning block 2 is installed in place, the acting force applied to the limiting piece 3 is released, the positioning block can be automatically reset under the action of the elastic compression piece 34, and the convenience of operation of an instrument is further improved.
Specifically, the positioning member 33 is disposed near the front side of the positioning device 100. When the positioning block 2 is disassembled, the positioning piece 33, the clamping part 31 and the limiting part 32 can be moved, and meanwhile, the elastic compression piece 34 can unlock the limitation of the positioning block 2 by the limiting piece 3, so that the positioning block 2 is disassembled.
The present invention is not limited thereto, and in other embodiments, the body member 1 has the positioning member 33, the stopper portion 32 has the fitting portion, and the positioning member 33 and the fitting portion are detachably connected so that the stopper 3 can be detached from the body member 1.
According to the positioning device 100 for replacing the unicondylar prosthesis, the positioning piece 33 of the main body piece 1 is detachably matched with the matching part of the limiting part 32, so that the connection stability of the limiting piece 3 and the main body piece 1 is improved.
As shown in fig. 5 and 7, the stopper 32 has a first abutment surface 321 and a second abutment surface 322 which are disposed opposite to each other in a second preset direction, a space between the first abutment surface 321 and the second abutment surface 322 increases in a direction from a bottom of the stopper groove 1111 to a notch to form a tapered stopper groove (in a direction from a free end of the U-shaped side edge to the U-shaped bottom edge, for example, a front-to-rear direction shown in fig. 1) in which each of the first stopper section 201 and the second stopper section 203 is tapered convex, and the tapered convex fits.
In the positioning device 100 for unicondylar prosthesis replacement according to the embodiment of the present invention, each of the first and second limiting segments 201 and 203 is tapered by increasing the interval between the first and second abutment surfaces 321 and 322 of the limiting portion 32 in the inside-out direction so as to form a tapered positioning groove. The structure of the conical convex and the conical positioning groove has better centering and guiding functions. Therefore, the assembly accuracy and convenience can be improved.
As shown in fig. 1 to 5, the main body 1 includes a supporting main body 11, a height block 12 and an adjusting member 13, the supporting main body 11 and the height block 12 are sequentially disposed along the height direction of the positioning device 100, the supporting main body 11 and the height block 12 are disposed with adjustable spacing along the height direction of the positioning device 100, the supporting main body 11 has a long slot hole with a length along the height direction of the positioning device 100, the adjusting member 13 is disposed in the long slot hole in a penetrating manner, and the adjusting member 13 is connected with the height block 12.
According to the positioning device 100 for replacing the unicondylar prosthesis, the main body part 1 is divided into the supporting main body 11, the height block 12 and the adjusting part 13, the supporting main body 11 and the height block 12 are arranged in an adjustable mode along the height direction of the positioning device 100, the supporting main body 11 can be placed at the position between the tibia and the femur, the tibia is padded and the supporting main body 11 is positioned, meanwhile, after the adjusting part 13 is unscrewed, a user can change the relative distance between the supporting main body 11 and the height block 12 through sliding, adjustment can be carried out according to the actual conditions of the tibia osteotomy and the defect of a patient, the positioning accuracy of the positioning device 100 and the stability of a drilling process are greatly improved, and the accuracy and the stability of drilling are further improved.
As shown in fig. 1 to 5, the supporting body 11 includes a supporting portion 111 and a fixing plate 112 connected to each other, the fixing plate 112 extends in a height direction of the positioning device 100, the elongated slot hole is opened in the fixing plate 112, the height block 12 includes a height adjusting portion 121 and an adjusting engagement portion 122, the height adjusting portion 121 and the supporting portion 111 are disposed opposite to each other in the height direction of the positioning device 100, the fixing plate 112 has a first tooth portion 1121, the adjusting engagement portion 122 has a second tooth portion 1221, the first tooth portion 1121 and the second tooth portion 1221 are engageable, and the adjusting engagement portion 122 is screw-engaged with the adjusting member 13 to control the engagement of the first tooth portion 1121 and the second tooth portion 1221.
A support plate is arranged on one side, far away from the long slot hole, of the fixed plate 112, and is provided with a straight plate part and an arc part which are integrally formed, wherein the radian of the arc part and the femoral condyle are arranged in an anatomic following way, and the straight plate part can be abutted on the rear condyle surface of the femoral condyle; the one end that high adjustment portion 121 kept away from adjusting cooperation portion 122 also is provided with straight board portion and arc portion just all is located the below of backup pad, and the straight board portion of high adjustment portion 121 can be placed on the tibia, can adjust the clearance between two straight board portions through adjusting piece 13 to satisfy the clearance demand after femur and tibia osteotomy, through the cooperation of the straight board portion of high adjustment portion 121 and tibia and the cooperation of the straight board portion of backup pad and the back condylar surface of femur, can confirm the best position of prosthesis.
The unicondylar prosthesis replacement positioning device 100 of the present embodiment controls the engagement of the first tooth 1121 and the second tooth 1221 by threadably engaging the adjustment engagement portion 122 with the adjustment member 13. The adjusting and matching part 122 can be reduced to be affected by external force and be close to the fixed plate 112 in the process of being far away from the fixed plate 112, so that the working stability and the stability and accuracy of drilling are further improved.
Alternatively, the adjustment member 13 may comprise a screw knob and a threaded rod connected, the threaded rod extending in the front-rear direction and being in threaded engagement with the height block 12, the screw knob abutting on the support body 11. Specifically, the position of the threaded rod near the screwing button is provided with a groove part, and the groove part is slidably arranged in the long slot hole in a penetrating manner, so that the adjustment is convenient, and in other embodiments, the adjusting piece 13 can also adopt other structures.
As shown in fig. 1 and 3, the inboard and/or outboard sockets have orientation indicators 25. The inner and outer identification characters can be confirmed in the operation of the operator, so that when the inner insertion position and the outer insertion position are selected, the inner and outer identification characters can be determined according to the extending directions of the first positioning hole 21 and the second positioning hole 22, and also can be determined according to the azimuth indication marks 25 on the inner insertion position and/or the outer insertion position, and the risk of error in the inner and outer direction in the operation can be reduced by double insurance, so that misuse is avoided.
As shown in fig. 1 and 3, the guide hole 1113 includes a first guide hole and a second guide hole disposed in parallel, which are disposed on both sides of the limit groove 1111 in the height direction of the positioning device 100, respectively. And further has the advantages of simple operation, strong operability and accurate positioning when in operation.
In performing the operation, a positioning needle (e.g., a k-wire) is inserted on the patient's bone such that the positioning needle is inserted on a marking line marked on the patient's bone by a nicking tool, and then the first and second guide holes on the support body 11 are provided on the positioning needle.
The positioning system of a unicondylar prosthetic replacement of an embodiment of the present invention comprises a positioning needle and a positioning device 100 of a unicondylar prosthetic replacement according to any of the above. Therefore, the positioning system has the advantages of simplifying the positioning device, improving the convenience of operation and reducing the risk of error in the direction of the inner side and the outer side in the operation.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (11)
1. A unicondylar prosthetic replacement positioning device comprising:
The main body piece is provided with a guide hole and a limiting groove with depth extending along a first preset direction, and the axial direction of the guide hole and the first preset direction have a preset included angle; and
The positioning block is provided with a first positioning hole and a second positioning hole which are used for inserting a positioning needle, the first positioning hole and the second positioning hole extend in the direction perpendicular to the thickness direction of the positioning block, the first positioning hole and the second positioning hole are arranged at intervals in the second preset direction perpendicular to the first preset direction, the axes of the first positioning hole and the second positioning hole intersect, on the inner side insertion position, the distance between the first positioning hole and the second positioning hole is reduced in the direction from the groove bottom to the notch of the limiting groove, on the outer side insertion position, the distance between the first positioning hole and the second positioning hole is increased in the direction from the groove bottom to the notch of the limiting groove, and the inner side insertion position and the outer side insertion position of the positioning block are alternatively clamped in the limiting groove so as to match with the positioning of the inner side femur and the outer side femur in the unicondylar prosthesis replacement process;
The positioning block is characterized by further comprising a limiting piece, wherein the limiting piece is connected to the main body piece, and a part of the limiting piece is in butt joint with the positioning block so as to prevent the positioning block from being separated from the main body piece.
2. The positioning device for the unicondylar prosthesis replacement according to claim 1, wherein one of a limiting protrusion and a limiting recess is provided on a wall of the limiting groove, the other of the limiting protrusion and the limiting recess is provided on the positioning block, and the limiting protrusion is engaged in the limiting recess.
3. The positioning device of unicondylar prosthesis replacement of claim 2, wherein one of the positioning block and the body member is provided with a stop projection that is capable of abutting the other of the positioning block and the body member to position the mounting location of the positioning block.
4. The positioning device for a unicondylar prosthesis replacement of claim 3, wherein the stop tab extends in the second predetermined direction, the stop tab being disposed on one side of the direction in which the stop tab extends.
5. The positioning device for unicondylar prosthesis replacement according to claim 1, wherein the limiting member comprises a clamping portion and a limiting portion connected with each other, the clamping portion is U-shaped, the clamping portion is clamped outside the main body member, the limiting portion is connected with a U-shaped side edge of the clamping portion, and the limiting portion abuts against the positioning block so as to prevent the positioning block from being separated from the main body member.
6. The positioning device for unicondylar prosthesis replacement according to claim 5, wherein the positioning block comprises a first limiting section, a positioning main body section and a second limiting section which are sequentially arranged, the first limiting section and the second limiting section are oppositely arranged along the first preset direction, each of the first limiting section and the second limiting section and the positioning main body section form a step part, the limiting parts can be alternatively clamped outside the first limiting section and the second limiting section, the limiting parts can be abutted with the positioning main body section, and the first positioning holes and the second positioning holes are respectively arranged on two sides of the positioning main body section.
7. The positioning device for a unicondylar prosthesis replacement of claim 5, wherein the body member has a positioning element and the stop member has a mating portion, the positioning element and the mating portion being removably coupled so that the stop member is removable from the body member;
Or, still include setting element and elastic compression spare, be equipped with mounting groove and mounting hole on the main part spare, the U type side centre gripping of block portion in on the main part spare, the setting element with the U type side of block portion is connected, the setting element is followed the axial slidable of guiding hole sets up in the mounting groove, the setting element with the U type base of block portion sets up relatively, part of elastic compression spare wears to establish in the mounting hole, just the both ends of elastic compression spare butt respectively the setting element with on the main part spare.
8. The positioning device for unicondylar prosthesis replacement of claim 6, wherein the stopper has a first abutment surface and a second abutment surface disposed opposite each other in the second preset direction, a spacing between the first abutment surface and the second abutment surface increases in a direction from a bottom of the stopper groove to a notch so as to form a tapered positioning groove, and each of the first stopper section and the second stopper section is tapered convex, the tapered convex being fitted in the positioning groove.
9. The positioning device for unicondylar prosthesis replacement according to any one of claims 1 to 8, wherein the main body member comprises a supporting main body, a height block and an adjusting member, the supporting main body and the height block are sequentially arranged along the height direction of the positioning device, the distance between the supporting main body and the height block in the height direction of the positioning device is adjustably arranged, the supporting main body is provided with a long slot hole with a length along the height direction of the positioning device, the adjusting member is penetrated in the long slot hole, and the adjusting member is connected with the height block;
and/or, the inner plug and/or the outer plug are provided with azimuth indication marks;
and/or the guide holes comprise a first guide hole and a second guide hole which are arranged in parallel, and the first guide hole and the second guide hole are respectively arranged at two sides of the limit groove along the height direction of the positioning device.
10. The positioning device of unicondylar prosthesis replacement according to claim 9, wherein the support body comprises a support portion and a fixing plate connected to each other, the fixing plate extends along a height direction of the positioning device, the elongated slot is opened in the fixing plate, the height block comprises a height adjusting portion and an adjusting engagement portion, the height adjusting portion and the support portion are disposed opposite to each other along the height direction of the positioning device, the fixing plate has a first tooth portion, the adjusting engagement portion has a second tooth portion, the first tooth portion and the second tooth portion are engageable, and the adjusting engagement portion is in threaded engagement with the adjusting member to control engagement of the first tooth portion and the second tooth portion.
11. A positioning system of a unicondylar prosthesis replacement, characterized by comprising a positioning needle and a positioning device of a unicondylar prosthesis replacement according to any of the claims 1-10.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410176407.3A CN117717443B (en) | 2024-02-08 | 2024-02-08 | Positioning device and positioning system for unicondylar prosthesis replacement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410176407.3A CN117717443B (en) | 2024-02-08 | 2024-02-08 | Positioning device and positioning system for unicondylar prosthesis replacement |
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| CN117717443A CN117717443A (en) | 2024-03-19 |
| CN117717443B true CN117717443B (en) | 2024-05-07 |
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| CN202410176407.3A Active CN117717443B (en) | 2024-02-08 | 2024-02-08 | Positioning device and positioning system for unicondylar prosthesis replacement |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994005212A1 (en) * | 1992-09-10 | 1994-03-17 | Depuy Inc. | Method and apparatus for installing a femoral component |
| CN204909559U (en) * | 2015-08-18 | 2015-12-30 | 长沙市第三医院 | Individuation knee joint thighbone distal end cuts bone conduction board |
| WO2022142696A1 (en) * | 2020-12-31 | 2022-07-07 | 北京长木谷医疗科技有限公司 | Femoral guide plate for total knee arthroplasty, and method for using femoral guide plate |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2867963B1 (en) * | 2004-03-26 | 2006-06-02 | Francis Guillaume | ANCILLARY SET TO IMPLEMENT A KNEE PROSTHESIS |
| US9173743B2 (en) * | 2009-07-01 | 2015-11-03 | Biomet Uk Limited | Method of implanting a unicondylar knee prosthesis |
| US8403994B2 (en) * | 2011-01-19 | 2013-03-26 | Wright Medical Technology, Inc. | Knee implant system |
| CN109199647A (en) * | 2017-07-03 | 2019-01-15 | 天津富华医疗科技有限公司 | Half condyle formula artificial knee joint |
-
2024
- 2024-02-08 CN CN202410176407.3A patent/CN117717443B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994005212A1 (en) * | 1992-09-10 | 1994-03-17 | Depuy Inc. | Method and apparatus for installing a femoral component |
| CN204909559U (en) * | 2015-08-18 | 2015-12-30 | 长沙市第三医院 | Individuation knee joint thighbone distal end cuts bone conduction board |
| WO2022142696A1 (en) * | 2020-12-31 | 2022-07-07 | 北京长木谷医疗科技有限公司 | Femoral guide plate for total knee arthroplasty, and method for using femoral guide plate |
Non-Patent Citations (1)
| Title |
|---|
| 数字化技术在控制膝关节单髁置换股骨假体力线精确性中的应用;蔡俊丰;马敏;罗树林;曾文;魏延辉;尹峰;;同济大学学报(医学版);20171215(第06期) * |
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| CN117717443A (en) | 2024-03-19 |
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