CN216876561U - Angle-adjustable bone fracture plate for distal femur - Google Patents
Angle-adjustable bone fracture plate for distal femur Download PDFInfo
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- CN216876561U CN216876561U CN202121025501.7U CN202121025501U CN216876561U CN 216876561 U CN216876561 U CN 216876561U CN 202121025501 U CN202121025501 U CN 202121025501U CN 216876561 U CN216876561 U CN 216876561U
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Abstract
The utility model discloses an angle-adjustable bone fracture plate for the far end of a femur, in the angle-adjustable bone fracture plate, the original integrated bone fracture plate is divided into an angle-adjustable bone stem plate and an angle-adjustable bone condyle side plate, the bone stem plate and the bone condyle side plate are respectively fixed with the femur at two ends of a bone fracture line through fixing nails, after the fixation, the front or back angulation deformity of the bone condyle end can be corrected by directly rotating an upper rotating disc, and the fracture end of the femur is ensured to be restored to a satisfactory alignment angle. And through direct deviation rectifying operation, the secondary damage to the fracture end is avoided, and the fixation strength after restoration is improved to keep enough stability and alignment.
Description
Technical Field
The utility model relates to the technical field of orthopedic medical instruments, in particular to an angle-adjustable bone fracture plate for a distal femur.
Background
In the orthopedic clinical treatment, the fracture of the distal condyle of the femur accounts for about 2 percent of the fracture of an adult and 8.46 percent of the fracture of the femur, and the fracture of the distal condyle of the femur is mainly caused by violent impacts such as car accidents, falls, crushing injuries and the like. According to the distribution of the fracture lines, there are classified as supracondylar fractures of the femur (extraarticular fractures) or intercondylar fractures (intra-articular fractures). At present, the treatment of distal femur fracture is mostly performed from the outer side of the distal femur, and a bone plate is implanted on the outer side of the femur for fixation.
Surgical treatment of peri-articular and intra-articular fractures of the distal femur presents a significant challenge to bone surgeons. The primary goal of surgical treatment is to restore the fractured ends of the femur to a satisfactory alignment angle while maintaining adequate stability and alignment. However, due to the special anatomical structure, the fracture distal end is difficult to achieve anatomical reduction due to muscle traction in the fracture reduction process. The distal end of the fracture presents anterior, posterior, medial and lateral angular displacement or lateral displacement which is difficult to reset and different degrees of rotational displacement, the mechanical axis of the lower limb deviates, so that the fracture is not healed and then secondary operation is performed, or deformity healing is performed, which is manifested as femoral metaphysis deformity, femoral intraarticular deformity, knee joint inversion or valgus deformity and the like, the stretching and bending of the knee joint and the load bearing function of the lower limb are influenced, severe patients form traumatic osteoarthritis, and the life quality of patients is reduced.
The bone plate is implanted to the inboard before the thighbone distal end that is common mostly clinically, as disclosed in chinese utility model patent CN2059241145U, in order to reach good fracture end alignment standard at the fixed in-process that resets, fracture end and set screw reset repeatedly, form the secondary to the fracture broken end and destroy, cause the mesh form of sclerotin face, make its screw fixation control power reduce, not only can not solve the problem of remaining angle, and it is fixed to reach satisfied fracture moreover.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an adjustable angle type bone fracture plate which can directly correct the far end of the fracture after fixation, avoid secondary damage to the broken end of the fracture and improve the fixation strength after reduction.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
a adjustable angle formula coaptation board for thighbone distal end includes the side bone plate with thighbone distal end inboard looks adaptation, rectangular shape, sets up the fixed orifices that a plurality of confession staples squeeze into on the length direction of side bone plate, its characterized in that:
the middle part of the lateral bone plate is provided with a first upper fixed disc and a first lower fixed disc which are concentrically superposed, and the first upper rotary disc can rotate along the center of the first upper rotary disc and is locked with the first lower fixed disc through a locking mechanism;
a bone shaft plate extends from the lower fixed disc to the proximal end of the femur, and a bone condyle lateral plate extends from the upper fixed disc to the distal end of the femur;
the lower fixed plate I, the bone shaft plate and the lower surfaces of the bone condyle side plates are smoothly connected and matched with the shape of the inner side of the distal end of the femur.
The further technical scheme is as follows:
the backbone plate is provided with a connecting arm bent towards the front side of the femur, and a second lower fixed plate positioned on the front side of the femur is arranged on the connecting arm;
an upper turntable II is concentrically superposed on the lower fixed plate II, can rotate along the center of the upper turntable II and is locked with the lower fixed plate II through a locking mechanism;
the upper rotating disc extends towards the far end of the femur to form a bone condyle front plate, and a plurality of fixing holes for driving fixing nails into are formed in the length direction of the bone condyle front plate;
the second lower fixed plate is smoothly connected with the lower surface of the bone condyle front plate and is matched with the shape of the distal end front side of the femur.
The further technical scheme is as follows: the lower end of the upper rotary disc I or the upper rotary disc II is provided with a sink groove with a polygonal section, and the edge of the opening of the sink groove is provided with a flange;
the locking mechanism includes:
the rotating shaft is fixed in the center of the first lower fixed disc or the second lower fixed disc, the upper end of the rotating shaft penetrates through the corresponding upper rotating disc, and the upper end of the rotating shaft is provided with an external thread;
the lock disc can be arranged in the sinking groove in a vertically sliding mode and is matched with the sinking groove in shape, and the lock disc is limited downwards by the flange;
the locking teeth are circumferentially distributed on the lower surface of the lock disc and the upper surface of the corresponding lower fixed disc by taking the rotating shaft as the center, so that the lock disc can be meshed and locked with the corresponding lower fixed disc; and
and the thread lock sleeve is connected outside the rotating shaft in a threaded manner and extends into the sinking groove.
The further technical scheme is as follows: an elastic supporting piece is arranged between the retaining side and the lock disc.
The further technical scheme is as follows: and a limiting mechanism for limiting the corresponding upper rotary disc to rotate within the range of +10 degrees to-10 degrees is arranged between the lower fixed disc I or the lower fixed disc II and the corresponding upper rotary disc.
The further technical scheme is as follows: the limiting mechanism comprises a positioning shaft fixed on the first lower fixed disc or the second lower fixed disc, a sliding hole for the positioning shaft to pass through is formed in the corresponding upper rotating disc, and the central angle corresponding to the sliding hole is 20 degrees.
The further technical scheme is as follows: the positioning shaft is screwed with a nut capable of pressing the corresponding upper turntable.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
in the angle-adjustable bone fracture plate, the original integrated bone fracture plate is divided into an angle-adjustable bone stem plate and an angle-adjustable bone condyle side plate, the bone stem plate and the bone condyle side plate are respectively fixed with thighbones at two ends of a fracture line through fixing nails, and after the fixation, the front or rear angulation deformity of the bone condyle end can be corrected by directly rotating the upper rotating disc, so that the femur fracture end is ensured to be restored to a satisfactory alignment angle. And through direct deviation rectifying operation, the secondary damage to the broken end of the fracture is avoided, and the fixation strength after resetting is improved to keep enough stability and alignment.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of an adjustable angle bone plate of the present disclosure;
FIG. 2 is a schematic structural view of a lateral bone plate of the adjustable angle bone plate of the present disclosure;
FIG. 3 is a schematic structural view of a locking mechanism in the adjustable angle bone plate of the present disclosure;
fig. 4 is a schematic structural view of a lower fixed plate in the angle-adjustable bone fracture plate of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Example one
As shown in fig. 1 to 4, the angle-adjustable bone fracture plate for the distal femur of the present disclosure includes a strip-shaped side bone plate adapted to the inner side of the distal femur, and a plurality of fixing holes for driving fixing nails are formed in the length direction of the side bone plate. The side bone plate can enter from the inner femoral tuberosity to the inner side of the front of the femur above the plane of the adductor ligament, the plane is flat and has no attachment point, the bone plate is implanted along the smooth plane, the soft tissue parts such as the patellar side collateral ligament and the like are avoided at the condyle part, the bone plate trunk part is positioned at the upper edge of the inner side ridge, the interference to the attachment point of the muscle group is completely avoided, the fixing holes are sequentially arranged, the orientation of the fixing holes can be staggered, the screws can be embedded into the bone as far as possible, and the maximum holding force is ensured.
In the angle adjustable bone fracture plate, the middle part of the side bone plate is provided with an upper rotating disc I101 and a lower fixed disc I102 which are concentrically superposed, and the upper rotating disc I101 can rotate along the center of the upper rotating disc I102 and is locked with the lower fixed disc I102 through a locking mechanism. The first lower fixed plate 102 extends to the proximal end of the femur to form a diaphysis plate 1, and the first upper rotary plate 101 extends to the distal end of the femur to form a condyle lateral plate 2. The lower surfaces of the first lower fixed plate 102, the backbone plate 1 and the condyle side plate 2 are smoothly connected and are matched with the shape of the inner side of the distal end of the femur, namely, the thickness of the stacked upper rotating plate 101 and the lower fixed plate 102 is the same as that of the backbone plate 1 and the condyle side plate 2.
In the angle-adjustable bone fracture plate, the original integrated bone fracture plate is divided into an angle-adjustable bone stem plate 1 and an angle-adjustable bone condyle side plate 2, the bone stem plate 1 and the bone condyle side plate 2 are respectively fixed with thighbones at two ends of a fracture line through fixing nails, after the fixing, the front or rear angulation deformity of the bone condyle end can be corrected by directly rotating an upper rotating disc, the femur fracture end is ensured to be restored to a satisfactory alignment angle, and after the angle is adjusted, the upper rotating disc I101 and a lower fixed disc I102 are locked. And through direct deviation rectifying operation, the secondary damage to the fracture end is avoided, and the fixation strength after restoration is improved to keep enough stability and alignment.
The locking mechanism includes a spindle 302, a lock collar 303, lock teeth 304, and a threaded lock sleeve 305. The lower end of the upper rotating disc I101 is provided with a sink groove 301 with a polygonal cross section, and the edge of the opening of the sink groove 301 is provided with a flange. The lock dish 303 can be gliding arrange in heavy groove 301 from top to bottom to with the shape phase-match of heavy groove 301, through polygonal structure setting, can make go up and can not take place to rotate between dish 101 and the lock dish 303, the lock dish 303 is arranged in heavy groove 301 back down spacing through the flange, prevents that the lock dish 303 from deviating from in heavy groove 301. The rotating shaft 302 is fixed at the center of the lower fixed disc I102, penetrates through the centers of the lock disc 303 and the upper rotating disc I101 upwards, the upper rotating disc I101 can rotate along the rotating shaft 302, and the upper end of the rotating shaft 302 is provided with an external thread. The screw lock sleeve 305 is screwed outside the rotating shaft 302 and extends into the sinking groove 301. The lock teeth 304 are circumferentially distributed on the lower surface of the lock disc 303 and the upper surface of the corresponding lower fixed disc I102 by taking the rotating shaft 302 as a center, and the threaded lock sleeve 305 is rotated downwards, so that the threaded lock sleeve 305 can press the lock disc 303 downwards, the lock disc 303 can be meshed and locked with the corresponding lower fixed disc I102, the locking between the upper rotating disc I101 and the lower fixed disc I102 is realized, and the stable and firm angulation between the rectification rear main shaft plate 1 and the bone condyle side plate 2 is ensured.
Example two
Based on the first embodiment, the angle-adjustable bone fracture plate for the distal femur of the present disclosure can also be used for correcting the inner and outer angular deformity of the condylar end of a femur.
The backbone plate 1 has a connecting arm 4 bent toward the front side of the femur, and the connecting arm 4 has a second lower surface plate 202 positioned on the front side of the femur. An upper rotating disc II 201 is concentrically superposed on the lower fixed disc II 202, and the upper rotating disc II 201 can rotate along the center of the upper rotating disc II and is locked with the lower fixed disc II 202 through a locking mechanism. The upper rotating disc II 201 extends towards the far end of the femur to form a bone condyle front plate 3, and a plurality of fixing holes for fixing nails to be driven into are formed in the length direction of the bone condyle front plate 3. The lower fixed plate II 202 is smoothly connected with the lower surface of the bone condyle anterior plate 3 and is matched with the shape of the distal end of the femur on the anterior side, namely the thickness of the lower fixed plate II 202 and the upper fixed plate II 201 after being superposed is the same as that of the bone condyle anterior plate 3.
When the condylar end has internal or external angulation, the bone shaft plate 1 and the condylar front plate 3 are fixed with the femur, then the inward or outward angulation of the condylar end can be corrected by rotating the upper rotating disc II 201, then the upper rotating disc II 201 is locked with the lower fixed disc II 202, and finally the condylar side plate 2 is fixed. Can ensure that the fractured end of the femur is restored to a satisfactory alignment angle. And through direct deviation rectifying operation, the secondary damage to the fracture end is avoided, and the fixation strength after restoration is improved to keep enough stability and alignment.
The locking mechanism in this embodiment also includes a spindle 302, a lock collar 303, lock teeth 304, and a threaded lock sleeve 305. The lower end of the upper rotating disc 201 is provided with a sink groove 301 with a polygonal section, and the edge of the opening of the sink groove 301 is provided with a flange. The lock dish 303 can be gliding arrange in heavy groove 301 from top to bottom to with the shape phase-match of heavy groove 301, through polygonal structure setting, can make two 201 of last carousel and lock dish 303 between can not take place to rotate, lock dish 303 is arranged in heavy groove 301 back down spacing through the flange, prevents that lock dish 303 from deviating from in heavy groove 301. The rotating shaft 302 is fixed at the center of the second lower fixed disc 202, and penetrates through the centers of the lock disc 303 and the second upper rotating disc 201 upwards, the second upper rotating disc 201 can rotate along the rotating shaft 302, and the upper end of the rotating shaft 302 is provided with an external thread. The screw lock sleeve 305 is screwed outside the rotating shaft 302 and extends into the sinking groove 301. The lock teeth 304 are circumferentially distributed on the lower surface of the lock disc 303 and the upper surface of the corresponding second lower fixed disc 202 by taking the rotating shaft 302 as a center, and the threaded lock sleeve 305 is rotated downwards, so that the threaded lock sleeve 305 can press the lock disc 303 downwards, and the lock disc 303 can be meshed and locked with the corresponding second lower fixed disc 202, thereby realizing the locking between the second upper rotating disc 201 and the second lower fixed disc 202, and ensuring the stability and firmness of the angulation between the deviation-rectifying rear backbone plate 1 and the condyle front plate 3.
EXAMPLE III
In the angle-adjustable bone fracture plate for the distal femur of the present disclosure, an elastic support 306 is provided between the flange and the lock disc 303, the elastic support 306 may be in the form of a disc spring, etc., the lock disc 303 moves down to engage with the lower fixed disc and then compresses the elastic support 306, when the locking between the upper rotating disc and the lower fixed disc needs to be eliminated, the threaded lock sleeve 305 is rotated upward to eliminate the downward pressing force applied to the lock disc 303, and the lock disc 303 moves upward to be separated from the lower fixed disc under the action of the elastic support 306.
Example four
In the angle-adjustable bone fracture plate for the distal femur of the present disclosure, since the rotation of the upper rotating disk is manually operated by a doctor, in order to avoid an operation error of reverse angulation deformity caused by a large force application, a limiting mechanism is provided between the lower fixed disk one 102 or the lower fixed disk two 202 and the corresponding upper rotating disk for limiting the rotation of the corresponding upper rotating disk within a range of +10 ° to-10 °.
The limiting mechanism comprises a positioning shaft 402 fixed on the first lower fixed disc 102 or the second lower fixed disc 202, a sliding hole 401 for the positioning shaft 402 to pass through is formed in the corresponding upper rotating disc, and the corresponding central angle of the sliding hole 401 is 20 degrees.
In addition, the positioning shaft 402 is screwed with a nut capable of pressing the corresponding upper turntable, and the upper turntable and the lower turntable can be further locked by the nut.
The above is only a preferred embodiment of the utility model, and any simple modifications, variations and equivalents of the utility model may be made by anyone in light of the above teachings and fall within the scope of the utility model.
Claims (7)
1. A adjustable angle formula coaptation board for thighbone distal end includes the side bone plate with thighbone distal end inboard looks adaptation, rectangular shape, sets up the fixed orifices that a plurality of confession staples squeeze into on the length direction of side bone plate, its characterized in that:
the middle part of the lateral bone plate is provided with a first upper fixed disc (101) and a first lower fixed disc (102) which are concentrically superposed, and the first upper fixed disc (101) can rotate along the center thereof and is locked with the first lower fixed disc (102) through a locking mechanism;
the first lower fixed disc (102) extends towards the proximal end of the femur to form a bone shaft plate (1), and the first upper rotary disc (101) extends towards the distal end of the femur to form a bone condyle lateral plate (2);
the lower fixed plate I (102), the bone shaft plate (1) and the bone condyle lateral plate (2) are smoothly connected with each other, and are matched with the shape of the inner side of the distal end of the femur.
2. The adjustable angle bone plate of claim 1, wherein:
the backbone plate (1) is provided with a connecting arm (4) bent towards the front side of the femur, and a second lower fixed plate (202) positioned on the front side of the femur is arranged on the connecting arm (4);
an upper turntable II (201) is concentrically superposed on the lower fixed plate II (202), and the upper turntable II (201) can rotate along the center of the upper turntable II and is locked with the lower fixed plate II (202) through a locking mechanism;
the second upper rotating disc (201) extends towards the far end of the femur to form a condyle front plate (3), and a plurality of fixing holes for fixing nails to be driven into are formed in the length direction of the condyle front plate (3);
the second lower fixed plate (202) is smoothly connected with the lower surface of the bone condyle front plate (3) and is matched with the shape of the front side of the distal end of the femur.
3. The adjustable angle bone plate of claim 1 or 2, wherein:
the lower end of the upper rotating disc I (101) or the lower end of the upper rotating disc II (201) is provided with a sink groove (301) with a polygonal section, and the edge of an opening of the sink groove (301) is provided with a flange;
the locking mechanism includes:
the rotating shaft (302) is fixed at the center of the first lower fixed disc (102) or the second lower fixed disc (202), the upper end of the rotating shaft penetrates through the corresponding upper fixed disc, and the upper end of the rotating shaft (302) is provided with an external thread;
the lock disc (303) can be placed in the sinking groove (301) in a vertically sliding mode and is matched with the sinking groove (301) in shape, and the lock disc (303) is limited downwards by the flanges;
the locking teeth (304) are circumferentially distributed on the lower surface of the locking disc (303) and the upper surface of the corresponding lower fixed disc by taking the rotating shaft (302) as a center, so that the locking disc (303) can be meshed and locked with the corresponding lower fixed disc; and
and the threaded lock sleeve (305) is in threaded connection with the outside of the rotating shaft (302) and extends into the sinking groove (301).
4. The adjustable angle bone plate of claim 3, wherein: an elastic support (306) is arranged between the retaining edge and the lock disc (303).
5. The adjustable angle bone plate of claim 1 or 2, wherein: and a limiting mechanism for limiting the corresponding upper rotary disc to rotate in the range of +10 degrees to-10 degrees is arranged between the lower fixed disc I (102) or the lower fixed disc II (202) and the corresponding upper rotary disc.
6. The adjustable angle bone plate of claim 5 wherein: the limiting mechanism comprises a positioning shaft (402) fixed on the first lower fixed disc (102) or the second lower fixed disc (202), a sliding hole (401) for the positioning shaft (402) to penetrate through is formed in the corresponding upper rotating disc, and the central angle corresponding to the sliding hole (401) is 20 degrees.
7. The adjustable angle bone plate of claim 6, wherein: the positioning shaft (402) is screwed with a nut capable of pressing the corresponding upper turntable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121025501.7U CN216876561U (en) | 2021-05-13 | 2021-05-13 | Angle-adjustable bone fracture plate for distal femur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121025501.7U CN216876561U (en) | 2021-05-13 | 2021-05-13 | Angle-adjustable bone fracture plate for distal femur |
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| Publication Number | Publication Date |
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| CN216876561U true CN216876561U (en) | 2022-07-05 |
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| CN202121025501.7U Active CN216876561U (en) | 2021-05-13 | 2021-05-13 | Angle-adjustable bone fracture plate for distal femur |
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| CN (1) | CN216876561U (en) |
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2021
- 2021-05-13 CN CN202121025501.7U patent/CN216876561U/en active Active
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