CN107595443B - Split femoral condyle prosthesis and artificial knee joint - Google Patents
Split femoral condyle prosthesis and artificial knee joint Download PDFInfo
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- CN107595443B CN107595443B CN201711006476.6A CN201711006476A CN107595443B CN 107595443 B CN107595443 B CN 107595443B CN 201711006476 A CN201711006476 A CN 201711006476A CN 107595443 B CN107595443 B CN 107595443B
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- 210000000629 knee joint Anatomy 0.000 title claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 210000003127 knee Anatomy 0.000 description 10
- 210000002967 posterior cruciate ligament Anatomy 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 210000002303 tibia Anatomy 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000001356 surgical procedure Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 210000003484 anatomy Anatomy 0.000 description 1
- 238000011882 arthroplasty Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013150 knee replacement Methods 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
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Abstract
The invention relates to the technical field of medical appliances, in particular to a split femoral condyle prosthesis and an artificial knee joint. The split femoral condyle prosthesis comprises a femoral condyle basic body and a intercondylar box; the intercondylar box is detachably connected with the femoral condyle basic body; the intercondylar box is connected with the femoral condyle basic body through one or more of mortise and tenon structures, threaded connection, pin connection and key connection. The artificial knee joint comprises the split femoral condyle prosthesis. The invention aims to provide a split femoral condyle prosthesis and an artificial knee joint so as to realize the conversion between a PS type and a CR type of the femoral condyle prosthesis.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a split femoral condyle prosthesis and an artificial knee joint.
Background
In artificial knee prosthesis systems, there are two main forms of knee prosthesis, one is a CAM (CAM) PS femoral condyle prosthesis (see fig. 1) and the other is a CAM-free CR femoral condyle prosthesis (see fig. 2). Wherein, the femoral condyle prosthesis with the cam is matched with the tibial liner prosthesis with the upright post, and finally the assembling relation of the PS type prosthesis is formed. And the camless femoral condyle prosthesis mates with a tibial insert prosthesis having a non-post to form a mating relationship with the CR-type prosthesis. Wherein, the PS type is named as post-stable type; the proprietary name of the CR type is posterior cruciate ligament retaining type.
In performing artificial knee replacement, a doctor determines according to the final result of examination of the patient, and if the posterior cruciate ligament of the patient is not lost or diseased, the patient still has a healthy form, and the doctor can select to reserve the posterior cruciate ligament during operation, so that the CR type knee prosthesis system is used; if the patient's posterior cruciate ligament has been damaged or diseased very severely, losing the function that the ligament should have, the physician may choose to resect the posterior cruciate ligament during surgery, thereby using the PS-type knee prosthesis system.
The option of retaining or resecting the posterior cruciate ligament is a difficult option for the surgeon. The surgical plan planned prior to surgery may be inaccurate and may change at any time while the surgery is actually performed. Especially, when it is decided to use the CR type knee prosthesis system before an operation, it is found that the patient's posterior cruciate ligament cannot be used any more in the operation, and only the PS type knee prosthesis system can be cut off to be replaced, or the posterior cruciate ligament is damaged due to a mistake in the operation, and the PS type knee prosthesis system must be replaced. The replacement of surgical solutions can cause confusion in the preparation of the knee prosthesis system and even possible rejection of the already opened prosthesis.
The application aims at the problems that the femoral condyle prosthesis is an important component of a knee joint prosthesis system, and provides a split femoral condyle prosthesis and an artificial knee joint so as to realize the conversion between a PS type and a CR type of the femoral condyle prosthesis.
Disclosure of Invention
The invention aims to provide a split femoral condyle prosthesis, which is used for realizing the conversion between a PS type and a CR type of the femoral condyle prosthesis.
It is also an object of the present invention to provide an artificial knee joint to effect a transition between the PS and CR types of femoral condyle prostheses.
Based on the first object, the split-type femoral condyle prosthesis provided by the invention comprises a femoral condyle basic body and a intercondylar box;
The intercondylar box is detachably connected with the femoral condyle basic body.
Optionally, the intercondylar box is connected with the femoral condyle base body by one or more of mortise and tenon structures, threaded connections, pin connections, and keyed connections.
Optionally, the femoral condyle base body includes an anterior condyle and two posterior condyles; an intercondylar groove is formed between the two posterior condyles;
The intercondylar box comprises a front end surface, a rear end surface and two side surfaces adjacent to the front end surface and the rear end surface; the front end face is detachably connected with the front condyle, and the rear end face is detachably connected with the rear condyle.
Optionally, the femoral condyle base body includes an inner faying surface for connecting with a femoral condyle;
The inner joint surface of the anterior condyle is provided with at least one anterior tenon strip which extends along the direction vertical to the sagittal plane of the femoral condyle prosthesis; the front end face is provided with a front mortise corresponding to the front tenon strip;
the inner joint surface of the posterior condyle is provided with at least one posterior tenon strip which extends along the direction vertical to the sagittal plane of the femoral condyle prosthesis; the rear end face is provided with a rear mortise corresponding to the rear tenon strip;
the inner joint surface is fixedly provided with a fixed flash connected with the side surface of the intercondylar box, and the fixed flash is connected with the intercondylar box through a screw, a pin or a key.
Optionally, the intercondylar box comprises a first intercondylar sub-box and a second intercondylar sub-box; the front end surface is positioned on the first intercondylar sub-box, and the rear end surface is positioned on the second intercondylar sub-box;
The first intercondylar sub-box is provided with a sub-box tenon strip or a sub-box mortise, and the second intercondylar sub-box is provided with a sub-box tenon strip or a sub-box mortise which is matched and spliced with the sub-box mortise or the sub-box tenon strip of the first intercondylar sub-box; the sub-box mortise extends along a sagittal plane direction perpendicular to the femoral condyle prosthesis;
the first intercondylar sub-box is connected with the fixed flash through a screw, a pin or a key; the second intercondylar sub-box is connected with the fixed flash through a screw, a pin or a key.
Optionally, the intercondylar box comprises a first intercondylar sub-box and a second intercondylar sub-box detachably connected with the first intercondylar sub-box; the front end surface is positioned on the first intercondylar sub-box, and the rear end surface is positioned on the second intercondylar sub-box;
the femoral condyle basic body comprises an inner joint surface used for being connected with a femoral condyle and also comprises a groove joint surface connected with the intercondylar groove;
The inner joint surface of the anterior condyle is provided with at least one anterior sub-tenon strip which extends along the direction vertical to the sagittal plane of the femoral condyle prosthesis; the front end face is provided with a front mortise corresponding to the front tenon strip;
the femoral condyle prosthesis comprises a femoral condyle prosthesis body, and is characterized in that the groove joint surface is provided with at least one groove joint surface tenon strip or groove joint surface mortise, the groove joint surface tenon strip or the groove joint surface mortise extends along the sagittal plane direction of the femoral condyle prosthesis body, and the side surface of the intercondylar box is provided with a side mortise or a side tenon strip which is matched and spliced with the groove joint surface tenon strip or the groove joint surface mortise.
Optionally, the first intercondylar sub-box is wedge-shaped;
The second intercondylar sub-box includes a stop block that is connected with the first intercondylar sub-box by a screw, pin, or key.
Optionally, the first intercondylar sub-box is provided with a sub-box tenon strip or a sub-box mortise, and the second intercondylar sub-box is provided with a sub-box mortise or a sub-box tenon strip of the first intercondylar sub-box, which are matched and spliced; the sub-box mortise extends along a sagittal plane direction perpendicular to the femoral condyle prosthesis.
Optionally, the sub-box tenon strip, the front sub-tenon strip and the joint surface tenon strip are dovetail-shaped;
the stop block is in threaded connection with the first intercondylar sub-box through a screw.
Based on the second object, the artificial knee joint provided by the invention comprises the split femoral condyle prosthesis.
The split femoral condyle prosthesis provided by the invention is detachably connected with the femoral condyle basic body through the intercondylar box, so that the conversion between the PS type and the CR type of the femoral condyle prosthesis is realized; that is, when the PS-type femoral condyle prosthesis is required, the intercondylar box is fixedly connected to the femoral condyle base body, and when the CR-type femoral condyle prosthesis is required, only the femoral condyle base body is used. The split femoral condyle prosthesis can help doctors to quickly adjust the operation method, facilitates the operations of the doctors, saves the operation time, and is more beneficial to patients.
The artificial knee joint provided by the invention comprises the split femoral condyle prosthesis, so that the conversion between the PS type and the CR type of the femoral condyle prosthesis is realized, a doctor can be helped to quickly adjust the operation method, the operation of the doctor is facilitated, and the operation time is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a prior art PS femoral condyle prosthesis;
FIG. 2 is a schematic view of a prior art CR femoral condyle prosthesis;
FIG. 3 is an exploded view of a first split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 4 is a first schematic illustration of a first split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 5 is a second schematic view of a first split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 6 is a third schematic illustration of a first split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 7 is a left side view of the split femoral condyle prosthesis shown in FIG. 6;
FIG. 8 is a right side view of the split femoral condyle prosthesis shown in FIG. 6;
FIG. 9 is a first schematic illustration of a femoral condyle base of a first split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 10 is a second schematic view of a femoral condyle base of a first split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 11 is an enlarged view of region A of the femoral condyle base body shown in FIG. 10;
FIG. 12 is an enlarged view of region B of the femoral condyle base body shown in FIG. 10;
FIG. 13 is a first schematic view of a first intercondylar box of a first split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 14 is a second schematic view of the intercondylar box of the first split femoral condyle prosthesis provided in accordance with one embodiment of the present invention;
FIG. 15 is an exploded view of a second split femoral condyle prosthesis provided in accordance with one embodiment of the present invention;
FIG. 16 is a first schematic view of a second split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 17 is a second schematic view of a second split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 18 is a third schematic illustration of a second split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 19 is a left side view of the split femoral condyle prosthesis shown in FIG. 18;
FIG. 20 is a right side view of the split femoral condyle prosthesis shown in FIG. 18;
FIG. 21 is a first schematic view of a femoral condyle base of a second split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 22 is an enlarged view of region C of the femoral condyle basic body shown in FIG. 21;
FIG. 23 is a second schematic view of a femoral condyle base of a second split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 24 is a left side view of the femoral condyle base body shown in FIG. 23;
FIG. 25 is an enlarged view of region D of the femoral condyle basic body shown in FIG. 23;
FIG. 26 is a first schematic view of a first intercondylar sub-box of a second split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 27 is a second schematic view of a first intercondylar sub-box of a second split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 28 is a third schematic view of a first intercondylar sub-box of a second split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 29 is a first schematic view of a second intercondylar sub-box of a second split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 30 is a second schematic view of a second intercondylar sub-box of a second split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 31 is a third schematic view of a second intercondylar sub-box of a second split femoral condyle prosthesis provided in accordance with an embodiment of the present invention;
FIG. 32 is a left side view of the femoral condyle base body shown in FIG. 31;
fig. 33 is a top view of the femoral condyle base body shown in fig. 31.
Icon: 110-femoral condyle basic body; 111-anterior condyle; 1111-front tenon strip; 1112-front tenon strip; 112-posterior condyles; 1121-rear tenon bar; 113-intercondylar notch; 1131-groove interface; 1132-groove joint surface mortise; 114-inner bonding surface; 115-outer articular surface; 116-fixing the flash; 120-intercondylar box; 121-front end face; 1211-a front mortise; 1212-front mortise; 122-rear end face; 1221-rear mortise; 123-side; 1231-side tenon strip; 124-a first intercondylar sub-box; 1241-a sub-box mortise; 125-a second intercondylar sub-box; 1251-stop block; 1252-sub-box tenon strip.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 3-33, the present embodiment provides a split femoral condyle prosthesis; fig. 3 to 15 are schematic structural views of a split femoral condyle prosthesis according to the present embodiment, in which the intercondylar box is integrated; fig. 16-33 are schematic structural views of a split femoral condyle prosthesis with split intercondylar boxes.
The sagittal plane of this embodiment is a plane that divides the human body into left and right parts in the human anatomy, and is simply the sagittal plane, regardless of whether the parts are equivalent. For example, fig. 7, 8, 10 and 14 are each a display view on the sagittal plane.
Referring to fig. 3-33, the split femoral condyle prosthesis (femoral condyle prosthesis for short) provided in this embodiment is applied to an artificial knee joint, and includes a femoral condyle basic body 110 and an intercondylar box 120.
The intercondylar box 120 is removably coupled to the femoral condyle base 110.
The split femoral condyle prosthesis of the embodiment is detachably connected with the femoral condyle basic body 110 through the intercondylar box 120, so that the conversion between the PS type and the CR type of the femoral condyle prosthesis is realized; that is, when the PS-type femoral condyle prosthesis is required, the intercondylar box 120 is fixedly connected to the femoral condyle base 110, and when the CR-type femoral condyle prosthesis is required, only the femoral condyle base 110 is used. The split femoral condyle prosthesis can help doctors to quickly adjust the operation method, facilitates the operations of the doctors, saves the operation time, and is more beneficial to patients.
In the prior art, both PS-type and CR-type femoral condyle prostheses are often prepared in performing artificial knee arthroplasty to prevent overwhelming changes in surgical protocols. However, the femoral condyle prosthesis is specific to a patient, two sets of femoral condyle prostheses prepared during operation clearly increase the stock quantity of medical equipment manufacturers, thereby increasing the cost of the femoral condyle prosthesis and increasing the economic burden of the patient. The split femoral condyle prosthesis creatively solves the problem of selection of the CR type prosthesis and the PS type prosthesis in operation by a split design mode, can help doctors to quickly adjust the operation method, and saves operation time; meanwhile, due to the split design, the stock of medical instrument manufacturers can be reduced to the greatest extent, the stock pressure is reduced, the raw material consumption is reduced, the cost can be reduced to a great extent, and the benefit of enterprises is improved.
In an alternative to this embodiment, the intercondylar box 120 is coupled to the femoral condyle base 110 by one or more of mortise and tenon mechanisms, threaded connections, pin connections, and keyed connections. For example, the intercondylar box 120 is connected with the femoral condyle basic body 110 through the threads of a screw, through the connection of the screw and mortise and tenon structure combination, or through the connection of the pin and mortise and tenon structure combination, etc. The intercondylar box 120 and the femoral condyle base 110 may also be removably connected by other means.
In an alternative to this embodiment, the femoral condyle base body 110 includes an anterior condyle 111 and two posterior condyles 112; an intercondylar recess 113 is provided between the two posterior condyles 112; the intercondylar notch 113 of the CR-type femoral condyle prosthesis is used to avoid the posterior cruciate ligament of the human body; the intercondylar notch 113 of the PS femoral intercondylar prosthesis is connected to the intercondylar box 120.
The intercondylar box 120 includes corresponding anterior and posterior end surfaces 121, 122, and two side surfaces 123 adjacent the anterior and posterior end surfaces 121, 122; wherein the anterior surface 121 is removably coupled to the anterior condyle 111, such as a mortise and tenon connection, a threaded connection, a pin connection, a keyed connection, a bayonet connection, or the like; the posterior end 122 is removably coupled to the posterior condyles 112, such as, for example, a mortise and tenon connection, a threaded connection, a pin connection, a keyed connection, a bayonet connection, or the like. The intercondylar box 120 further includes corresponding upper and lower end surfaces adjacent the anterior end surface 121, the posterior end surface 122, and the two side surfaces 123, respectively; the lower end surface corresponds to intercondylar notch 113 and is removably attached to posterior condyle 112. Optionally, the side 123 is parallel to the sagittal plane of the femoral condyle prosthesis.
Referring to fig. 3-10, in the alternative of this embodiment, the femoral condyle base body 110 includes an inner articular surface 114 for connection with a femoral condyle, the inner articular surface 114 being for connection with a femoral condyle or for connection with a femoral condyle and intercondylar box 120; the femoral condyle base body 110 also includes a lateral articular surface 115; the outer articular surface 115 is for articulating with a joint prosthesis or a human body.
9-14, The inner articular surface 114 of the anterior condyle 111 is optionally provided with at least one anterior tenon strip 1111, the anterior tenon strip 1111 extending in a direction perpendicular to the sagittal plane of the femoral condyle prosthesis; front end face 121 is provided with a front mortise 1211 corresponding to front tenon strip 1111; the front tenon strip 1111 is inserted into the front mortise 1211, so that the front condyle 111 and the intercondylar box 120 are firmly connected with high connection accuracy. Alternatively, the number of front tongue strips 1111 may be, for example, 1,2, 3, or the like; when the number of front tenon strips 1111 is plural, the plural front tenon strips 1111 are arranged at intervals in the direction from the front condyle 111 to the rear condyle 112.
Optionally, the inner articular surface 114 of the posterior condyle 112 is provided with at least one posterior tenon strip 1121, the posterior tenon strip 1121 extending in a direction perpendicular to the sagittal plane of the femoral condyle prosthesis; rear face 122 is provided with rear mortise 1221 corresponding to rear tenon strip 1121; the rear tenon strip 1121 is inserted into the rear mortise 1221, so that the connection between the rear condyle 112 and the intercondylar box 120 is firm and high in connection precision. Alternatively, the number of the rear tongue bars 1121 may be, for example, 1,2,3, or the like; when the number of the posterior tenon strips 1121 is plural, the plural posterior tenon strips 1121 are arranged at intervals in the direction from the posterior condyle 112 to the anterior condyle 111.
Referring to fig. 9 and 10, optionally, a fixing burr 116 connected to a side 123 of the intercondylar box 120 is fixedly provided on the inner joint surface 114 of the femoral condyle basic body 110, and the fixing burr 116 is connected to the intercondylar box 120 by a screw, pin, or key. For example, the fixation burr 116 has a connecting circular hole through which a screw is threaded into a corresponding connecting threaded hole in the side 123 of the intercondylar box 120. For another example, the fixation burr 116 and the side 123 of the intercondylar box 120 have corresponding key holes, and the fixation burr 116 and the intercondylar box 120 are fixedly connected by an insertion key, i.e., the femoral intercondylar base 110 and the intercondylar box 120 are fixedly connected. The detachable and fixed connection between the fixing flash 116 and the side 123 of the intercondylar box 120 improves the firmness of the connection between the femoral intercondylar base 110 and the intercondylar box 120 and improves the connection precision between the femoral intercondylar base 110 and the intercondylar box 120. The fixation flash 116 also serves to locate the intercondylar box 120.
Optionally, the operation of assembling the CR-type femoral condyle prosthesis into the PS-type femoral condyle prosthesis includes the steps of inserting the intercondylar box 120 onto the femoral condyle base 110 along the anterior tenon strip 1111 and the posterior tenon strip 1121 until the side 123 of the intercondylar box 120 abuts against the fixing flash 116, and fixedly connecting the fixing flash 116 and the intercondylar box 120 by using screws, pins or keys.
The inner joint surface 114 may be fixedly provided with a fixing burr 116 connected to the front end surface 121 or the rear end surface 122 of the intercondylar box 120, and the fixing burr 116 and the intercondylar box 120 may be connected by a screw, a pin, or a key.
The intercondylar box 120 may be unitary or split. Optionally, the intercondylar box 120 includes a first intercondylar sub-box and a second intercondylar sub-box; the anterior surface 121 is located on the first intercondylar sub-box and the posterior surface 122 is located on the second intercondylar sub-box.
The first intercondylar sub-box and the second intercondylar sub-box can be fixedly connected through screws and also can be fixedly connected through mortise and tenon structures. Optionally, the first intercondylar sub-box is provided with a sub-box tenon strip or a sub-box mortise, and the second intercondylar sub-box is provided with a sub-box tenon strip or a sub-box mortise matched and inserted with the sub-box mortise or the sub-box tenon strip of the first intercondylar sub-box; the mortise of the sub-box extends along the direction vertical to the sagittal plane of the femoral condyle prosthesis; the first intercondylar sub-box and the second intercondylar sub-box are connected by the sub-box tenon strip and the sub-box mortise to improve the connection accuracy of the intercondylar box 120.
The first intercondylar sub-box is connected with the fixed flash 116 by screws, pins, or keys; the second intercondylar sub-box is attached to the fixation burr 116 by screws, pins, or keys. To fixedly connect the first intercondylar sub-box and the second intercondylar sub-box to the femoral condyle base body 110, improving the accuracy of the connection of the femoral condyle base body 110 and the intercondylar box 120.
Optionally, the operation steps of assembling the CR-type femoral condyle prosthesis into the PS-type femoral condyle prosthesis are that a first intercondylar sub-box is inserted into the femoral condyle basic body 110 along the front tenon strip 1111, a second intercondylar sub-box is inserted into the femoral condyle basic body 110 along the rear tenon strip 1121, wherein the insertion sequence of the first intercondylar sub-box and the second intercondylar sub-box can be interchanged; or the first intercondylar sub-box and the second intercondylar sub-box are inserted into a whole, and then are inserted into the femoral condyle basic body 110; thereafter, the fixation flash 116 is fixedly attached to the first intercondylar sub-box and the second intercondylar sub-box using screws, pins, or keys.
If the intercondylar box 120 is split, other means of attachment may be used. For example, referring to fig. 16-33, in an alternative version of the present embodiment, the intercondylar box 120 includes a first intercondylar sub-box 124 and a second intercondylar sub-box 125 removably coupled to the first intercondylar sub-box 124; the anterior surface 121 is located on a first intercondylar sub-box 124 and the posterior surface 122 is located on a second intercondylar sub-box 125.
The femoral condyle base body 110 includes an inner joint surface 114 for connection with a femoral condyle, and further includes a groove joint surface 1131 for connection with the intercondylar groove 113. Optionally, the groove-engaging surface 1131 is parallel to the sagittal plane of the femoral condyle prosthesis.
The inner joint surface 114 of the anterior condyle 111 is provided with at least one anterior sub-tenon bar 1112, the anterior sub-tenon bar 1112 extending in a direction perpendicular to the sagittal plane of the femoral condyle prosthesis; front end face 121 is provided with a front mortise 1212 corresponding to front tenon bar 1112; the front condyle 111 and the first intercondylar sub-box 124 are firmly connected and have high connection precision by being inserted into the front mortise and tenon groove 1212 through the front tenon strip 1112. Alternatively, the number of front sub-tenon strips 1112 may be, for example, 1,2,3, etc.; when the number of front sub-tenon strips 1112 is plural, the plural front sub-tenon strips 1112 are arranged at intervals in the direction from the front condyle 111 to the rear condyle 112.
The groove joint surface 1131 is provided with at least one groove joint surface tenon groove or groove joint surface mortise 1132 (see fig. 23 and 25), the groove joint surface tenon groove or groove joint surface mortise 1132 extends along the sagittal plane direction of the femoral condyle prosthesis, and the side surface 123 of the intercondylar box 120 is provided with a side mortise groove or side tenon groove 1231 (see fig. 29 and 30) which is matched and inserted with the groove joint surface tenon groove or groove joint surface mortise 1132. The groove joint surface tenon strip is inserted into the side mortise, or the groove joint surface mortise 1132 is inserted into the side tenon strip 1231, so that the connection firmness and the connection accuracy of the femoral condyle basic body 110 and the second intercondylar sub-box 125 are improved. The first intercondylar sub-box 124 is inserted along the direction perpendicular to the sagittal plane of the femoral condyle prosthesis, and the second intercondylar sub-box 125 is inserted along the direction perpendicular to the sagittal plane of the femoral condyle prosthesis, so that the connection firmness and connection accuracy of the intercondylar sub-box 120 and the femoral condyle basic body 110 are further improved.
Optionally, the first intercondylar sub-box 124 is wedge-shaped; to facilitate insertion of the first intercondylar sub-box 124.
29-33, The second intercondylar sub-box 125 optionally includes a stop 1251, the stop 1251 being connected to the first intercondylar sub-box 124 by a screw, pin, or key. Optionally, a stop 1251 is provided on the side 123 of the second intercondylar sub-box 125 to provide positioning when the first intercondylar sub-box 124 is inserted into the second intercondylar sub-box 125, thereby improving the accuracy of the connection of the intercondylar box 120 to the femoral condyle base 110.
Referring to fig. 19 and fig. 26-33, further, the first intercondylar sub-box 124 is provided with a sub-box tongue strip or a sub-box mortise 1241, and the second intercondylar sub-box 125 is provided with a sub-box tongue strip or a sub-box mortise 1241 of the first intercondylar sub-box 124, and the sub-box mortise or the sub-box tongue strip 1252 is inserted in a matched manner; the sub-box mortise 1241 extends along a sagittal plane direction perpendicular to the femoral condyle prosthesis and is connected in a mortise and tenon manner to improve connection firmness and connection accuracy of the first intercondylar sub-box 124 and the second intercondylar sub-box 125.
Optionally, the operation steps of assembling the CR-type femoral condyle prosthesis into the PS-type femoral condyle prosthesis are that the second intercondylar sub-box 125 is firstly inserted into the femoral condyle basic body 110 along the groove joint surface tenon strip or the groove joint surface mortise 1132, and then the first intercondylar sub-box 124 is inserted into the femoral condyle basic body 110 along the front sub-tenon strip 1112 until reaching the stop block 1251 of the second intercondylar sub-box 125; thereafter, the stop 1251 is fixedly coupled to the first intercondylar sub-box 124, i.e., the first intercondylar sub-box 124 and the second intercondylar sub-box 125, using screws, pins, or keys. Because the first intercondylar sub-box 124 and the second intercondylar sub-box 125 are inserted in a perpendicular direction, the first intercondylar sub-box 124 and the second intercondylar sub-box 125 are firmly fixed to the femoral condyle base body 110.
The mortise and tenon structure of this embodiment may be, for example, dovetail, rectangular, or circular arc. Optionally, the sub-box tongue 1252, the front sub-tongue 1112, and the joint face tongue are dovetail-shaped to improve connection robustness.
Optionally, the front and rear tongue strips 1111, 1121 are dovetail shaped to improve the connection firmness.
Optionally, stop 1251 is screwed with first intercondylar sub-box 124 by a screw. So as to reduce the screws as much as possible and improve the precision of the femoral condyle prosthesis. Optionally, the nominal diameter of the screw is not less than M3; alternatively, the nominal diameter of the screw is not less than M3 and not greater than M10.
During the operation, no matter what type of knee prosthesis is finally selected, the CR type femoral condyle prosthesis is firstly used, and after the selection is determined to be correct, the CR type femoral condyle prosthesis can be implanted according to the original scheme. If the surgical plan is finally changed and the PS-type femoral condyle prosthesis is selected, the intercondylar box 120 can be selected and inserted into the CR-type femoral condyle prosthesis, thereby achieving the purpose of implanting the PS-type femoral condyle prosthesis.
Example two
A second embodiment provides an artificial knee joint, where the embodiment includes the split femoral condyle prosthesis described in the first embodiment, and technical features of the split femoral condyle prosthesis disclosed in the first embodiment are also applicable to the embodiment, and technical features of the split femoral condyle prosthesis disclosed in the first embodiment are not repeated.
The artificial knee joint provided by the embodiment comprises a split femoral condyle prosthesis; also comprises a tibia pad; the tibia pad is matched and connected with the split femur condyle prosthesis. The split femoral condyle prosthesis is CR-type, and the tibia pad is also CR-type; the split femoral condyle prosthesis is PS-shaped, and the tibial gasket is also PS-shaped. The upright post of the PS-type tibia pad is movably connected with the intercondylar box. Through split type femoral condyle prosthesis, the conversion between PS type and CR type of the femoral condyle prosthesis is realized, a doctor can be helped to quickly adjust the operation method, the doctor can operate conveniently, the operation time is saved, and the split type femoral condyle prosthesis is more beneficial to patients.
The artificial knee joint of the present embodiment has the advantages of the split femoral condyle prosthesis of embodiment one, and the advantages of the split femoral condyle prosthesis of embodiment one disclosed herein are not repeated here.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (7)
1. The split femoral condyle prosthesis is characterized by comprising a femoral condyle basic body and a intercondylar box;
The intercondylar box is detachably connected with the femoral condyle basic body;
the intercondylar box is connected with the femoral condyle basic body through one or more of mortise and tenon structures, threaded connection, pin connection and key connection;
The femoral condyle basic body comprises an anterior condyle and two posterior condyles; an intercondylar groove is formed between the two posterior condyles;
The intercondylar box comprises a front end surface, a rear end surface and two side surfaces adjacent to the front end surface and the rear end surface; wherein the front end surface is detachably connected with the front condyle, and the rear end surface is detachably connected with the rear condyle;
the femoral condyle basic body comprises an inner joint surface for connecting with a femoral condyle;
The inner joint surface of the anterior condyle is provided with at least one anterior tenon strip which extends along the direction vertical to the sagittal plane of the femoral condyle prosthesis; the front end face is provided with a front mortise corresponding to the front tenon strip;
the inner joint surface of the posterior condyle is provided with at least one posterior tenon strip which extends along the direction vertical to the sagittal plane of the femoral condyle prosthesis; the rear end face is provided with a rear mortise corresponding to the rear tenon strip;
the inner joint surface is fixedly provided with a fixed flash connected with the side surface of the intercondylar box, and the fixed flash is connected with the intercondylar box through a screw, a pin or a key.
2. The split femoral condylar prosthesis of claim 1 wherein said intercondylar box comprises a first intercondylar sub-box and a second intercondylar sub-box; the front end surface is positioned on the first intercondylar sub-box, and the rear end surface is positioned on the second intercondylar sub-box;
The first intercondylar sub-box is provided with a sub-box tenon strip or a sub-box mortise, and the second intercondylar sub-box is provided with a sub-box tenon strip or a sub-box mortise which is matched and spliced with the sub-box mortise or the sub-box tenon strip of the first intercondylar sub-box; the sub-box mortise extends along a sagittal plane direction perpendicular to the femoral condyle prosthesis;
the first intercondylar sub-box is connected with the fixed flash through a screw, a pin or a key; the second intercondylar sub-box is connected with the fixed flash through a screw, a pin or a key.
3. The split femoral condyle prosthesis is characterized by comprising a femoral condyle basic body and a intercondylar box;
The intercondylar box is detachably connected with the femoral condyle basic body;
the intercondylar box is connected with the femoral condyle basic body through one or more of mortise and tenon structures, threaded connection, pin connection and key connection;
The femoral condyle basic body comprises an anterior condyle and two posterior condyles; an intercondylar groove is formed between the two posterior condyles;
The intercondylar box comprises a front end surface, a rear end surface and two side surfaces adjacent to the front end surface and the rear end surface; wherein the front end surface is detachably connected with the front condyle, and the rear end surface is detachably connected with the rear condyle;
The intercondylar box comprises a first intercondylar sub-box and a second intercondylar sub-box which is detachably connected with the first intercondylar sub-box; the front end surface is positioned on the first intercondylar sub-box, and the rear end surface is positioned on the second intercondylar sub-box;
the femoral condyle basic body comprises an inner joint surface used for being connected with a femoral condyle and also comprises a groove joint surface connected with the intercondylar groove;
The inner joint surface of the anterior condyle is provided with at least one anterior sub-tenon strip which extends along the direction vertical to the sagittal plane of the femoral condyle prosthesis; the front end face is provided with a front mortise corresponding to the front tenon strip;
the femoral condyle prosthesis comprises a femoral condyle prosthesis body, and is characterized in that the groove joint surface is provided with at least one groove joint surface tenon strip or groove joint surface mortise, the groove joint surface tenon strip or the groove joint surface mortise extends along the sagittal plane direction of the femoral condyle prosthesis body, and the side surface of the intercondylar box is provided with a side mortise or a side tenon strip which is matched and spliced with the groove joint surface tenon strip or the groove joint surface mortise.
4. The split femoral condyle prosthesis of claim 3, wherein said first intercondylar sub-box is wedge-shaped;
The second intercondylar sub-box includes a stop block that is connected with the first intercondylar sub-box by a screw, pin, or key.
5. The split femoral condyle prosthesis of claim 4, wherein the first intercondylar sub-box is provided with a sub-box tongue strip or a sub-box mortise, and the second intercondylar sub-box is provided with a sub-box tongue strip or a sub-box mortise in which the sub-box tongue strip or the sub-box mortise of the first intercondylar sub-box is matched and spliced; the sub-box mortise extends along a sagittal plane direction perpendicular to the femoral condyle prosthesis.
6. The split femoral condyle prosthesis of claim 5, wherein said sub-box tenon strip, said anterior sub-tenon strip, and said faying surface tenon strip are dovetail shaped;
the stop block is in threaded connection with the first intercondylar sub-box through a screw.
7. An artificial knee joint comprising the split femoral condyle prosthesis of any one of claims 1-6.
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| CN110538010B (en) * | 2019-09-17 | 2024-05-28 | 北京爱康宜诚医疗器材有限公司 | Unicondylar knee joint prosthesis |
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| CN104203160A (en) * | 2012-01-30 | 2014-12-10 | 捷迈有限公司 | Asymmetric tibial components for a knee prosthesis |
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