Disclosure of Invention
It is an aim of embodiments of the present invention to provide a bone plate that overcomes, at least in part, one or more of the problems due to the limitations and disadvantages of the related art.
The embodiment of the invention provides a bone fracture plate, which is used for fixing the relative positions of all parts of bones and comprises the following components:
a head part having a plate shape for being fixed to one side of the bone incision in the bone length direction;
The shaft part is fixed on the other side of the bone incision along the length direction of the bone, the shaft part is in a P-shaped plate shape as a whole and comprises a first shaft part and a second shaft part which are mutually connected in the lateral direction, the length of the first shaft part is longer than that of the second shaft part, and a gap extending along the length direction is arranged between the first shaft part and the second shaft part;
a connecting portion connecting the head portion and the shaft portion;
Wherein the head is everted in a direction away from the bone and has a predetermined everting angle.
In an embodiment of the present invention, the preset eversion angle is 5 ° -11 °.
In one embodiment of the invention, the connecting portion has at least one detent on an outer surface proximate the bone for insertion into the bone cutout.
In one embodiment of the present invention, the latch is wedge-shaped, and the bottom surface of the latch is engaged with the connecting portion, and an angle between an edge of the bottom surface, which is close to the shaft portion, and a horizontal line is 10 ° -35 °.
In an embodiment of the invention, the gap extends from the shaft portion to the connecting portion or the head portion, and the width of the gap is 0.5mm-3mm.
In one embodiment of the invention, the thickness of the bone plate decreases from the connection portion toward the head portion and the shaft portion, respectively.
In an embodiment of the present invention, the head portion has a plurality of first through holes, and the plurality of first through holes are spaced apart.
In one embodiment of the present invention, the plurality of first through holes are arranged in two or more relatively parallel rows.
In one embodiment of the present invention, the first shaft portion has a plurality of second through holes, the plurality of second through holes being spaced apart, and
The second shaft part is provided with a plurality of third through holes, and the third through holes are distributed at intervals.
In an embodiment of the present invention, the columns formed by the plurality of second through holes and the columns formed by the plurality of third through holes are relatively parallel.
In one embodiment of the invention, any one or more of the head portion, the shaft portion, and the connecting portion has a plurality of protrusions on an outer surface proximate the bone.
In one embodiment of the present invention, a plurality of the protruding portions are uniformly distributed.
In one embodiment of the invention, the bone comprises a tibia and a femur.
The technical scheme provided by the embodiment of the invention can comprise the following beneficial effects:
In the embodiment of the invention, on one hand, the whole bone fracture plate has a P-shaped structure, the head part turns outwards to a certain angle towards the direction deviating from bones, the bone fracture plate can be completely attached to the surface of the tibia, the distribution positions of the head part and the shaft part of the bone fracture plate on the bones are combined, the bone fracture plate has the anti-torsion and anti-rotation performances, the bone fracture plate can be immediately and firmly fixed after operation, the fixation firmness of the bone fracture plate is further improved, and the use quantity of the bone fracture plate is reduced. On the other hand, the gap between the first shaft part and the second shaft part not only provides anti-rotation torque force, but also reduces the compression on bones, and can greatly shorten the time for bone healing.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many different forms and should not be construed as limited to the examples set forth herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of embodiments of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted.
In this exemplary embodiment, a bone plate 100 is provided for fixation of the relative positions of various portions of bone, and the bone plate 100 may include a head portion 110, a shaft portion 120, and a connecting portion 130, as shown with reference to fig. 1-6. The head 110 is plate-shaped and can be fixed to one side of the bone cut along the length direction of the bone, and the head 110 is turned outwards at an angle in a direction away from the bone. The shaft 120 may be fixed to the other side of the bone along the length direction of the bone, and the shaft 120 is generally P-shaped and includes a first shaft 121 and a second shaft 122 that are laterally connected to each other, wherein the length of the first shaft 121 is greater than that of the second shaft 122, and a gap 140 extending in the length direction is provided between the first shaft 121 and the second shaft 122. The connection portion 130 is used to connect the head portion 110 and the shaft portion 120.
In this example, on the one hand, the above bone plate 100 integrally presents a P-type structure, and the head 110 is turned outwards in a direction away from the bone by a certain angle, so that the bone plate 100 can conform to the shape of the tibia, and can be completely attached to the surface of the tibia, and the distribution positions of the head 110 and the shaft 120 of the bone plate 100 on the bone are combined, so that the bone plate 100 has the performances of torsion resistance and rotation resistance, can be immediately stable after operation, further increases the fixation firmness of the bone plate, and also reduces the number of bone plates. On the other hand, the gap 140 provided between the first shaft portion 121 and the second shaft portion 120 not only provides anti-rotation torque, but also reduces compression of the bone plate to the bone, and can greatly shorten the time for bone healing.
In a specific example, the bone may include a tibia and a femur. For example, as shown in fig. 7, when the bone plate 100 is used to fix the relative positions of the proximal portions of the tibia 200, the head 110 of the bone plate 100 is fixed above the tibial cut 210, the shaft 120 of the bone plate 100 is fixed below the tibial cut 210, and the connecting portion 130 is made to correspond to the position of the tibial cut 210. When the bone plate 100 is used for fixation of the relative positions of the distal portions of the femur, the head 110 of the bone plate 100 may be secured below the femoral cut and the shaft 120 of the bone plate 100 may be secured above the femoral cut.
Hereinafter, the respective portions of the above-described bone plate 100 in the present exemplary embodiment will be described in more detail with reference to fig. 1 to 6.
In one embodiment, the head portion 110, shaft portion 120, and connecting portion 130 of the bone plate 100 may be integrally formed from a single material, and in particular, the material may be composed of biocompatible materials such as titanium, titanium alloys, stainless steel, resorbable biomaterials, allograft, and the like, although not limited in this regard.
In one embodiment, the head 110 is preset at an eversion angle of 5 ° -11 °, which is specifically an angle between a tangent to the outer surface of the head 110 and an extension line of the surface of the connecting portion 130. In a tibial high osteotomy, the medical practitioner cuts a small piece of bone at about five centimeters from the articular surface at the upper end of tibia 200, and fills it with a filler to expand above it to force the tibia to evert, returning the mechanical axis of the tibia to its normal position. Thus, everting the head 110 5 ° -11 ° may allow the entire bone plate 100 to more closely conform to the everted tibia, and thus may be more secure when secured. Similarly, the everting angle is also suitable for fixation of the femur distal correction surgery.
Illustratively, the connecting portion 130 has at least one latch 131 proximate the outer surface of the bone for insertion into a cutout in the bone. The clamping tenons 131 provide firm support for the osteotomy face, and can effectively avoid the problem of angle loss or platform collapse after the tibial high-level osteotomy.
Specifically, as shown in fig. 2, the number of the tenons 131 is 3, however, in other embodiments, the number of the tenons 131 may be 1,2 or more, and the volume of the tenons 131 may be changed accordingly.
In one embodiment, the latch 131 is generally wedge-shaped, and a bottom surface (not shown) of the latch 131 engages the connection 130. The overall wedge shape of the tongue 131 better matches the shape of the tibial or femoral cut 210 to further enhance support for the osteotomy face. Specifically, the engagement manner of the latch 131 and the connection portion 130 may be integrally formed, or other engagement manners known to those skilled in the art. Of course, in particular implementations, the latch 131 may be altered to match the shape of the actual tibial or femoral cut.
Specifically, in one example, as shown in FIG. 3, the bottom surface of the latch 131 near the edge 1311 of the shaft 120 may have an angle α with the horizontal 300 in the range of 10-35. Wherein, the horizontal line 300 is a line perpendicular to the vertical axis of the bone plate 100, and the range of α corresponds to the inclination degree of the incision 210, so that the latch 131 can be more closely inserted into the incision, thereby saving the step of measuring the osteotomy direction during the operation by the medical staff and shortening the operation time. For example, the included angle may be specifically 10 °,15 °,20 °, 25 °, 30 °, 35 °, and so on.
In one embodiment, the gap 140 is located between the first shaft portion 121 and the second shaft portion 122, but the bottom end of the gap 140 does not interrupt the connection of the first shaft portion 121 to the bottom of the second shaft portion 122. Alternatively, in other embodiments, the top end of the void 140 may extend from the shaft portion 120 all the way to the connection portion 130 or the head portion 110. Thus, not only is compression of bone by the bone plate shaft 120 reduced, but also compression of bone by the bone plate connection 130 and head 110 is reduced, and in addition, the overall anti-rotation performance of the bone plate 100 is further enhanced.
Specifically, the width of the gap 140 may be 0.5mm-3mm to provide the bone plate 100 with optimal mechanical properties. When the width is smaller than 0.5mm, the anti-rotation performance of the bone fracture plate is reduced, and when the width is larger than 3mm, the fixing strength of the bone fracture plate is weakened due to larger occupied area.
In one example, the overall thickness of the bone plate 100 decreases from the connection 130 toward the head 110 and shaft 120, respectively, i.e., the bone plate 100 is thicker in the middle and thinner at the ends as a whole, which may enhance the load bearing capacity of the bone plate 100 and make it stronger and less fragile.
In one embodiment, the bone plate head 110 has a plurality of first through holes 111, the plurality of first through holes 111 being spaced apart. The first through hole 111 is used to pass a bone anchor therethrough to secure the head of the bone plate 100 to the tibia 200. These bone anchors may be bone screws, nails, pins, etc., as well as other types of bone anchors known to those of ordinary skill in the art. For example, when the bone anchor used is a screw, threads matching the screw may also be provided in the plurality of first through holes 111.
In a specific example, as shown in fig. 1, the plurality of first through holes 111 are arranged in two relatively parallel rows, but may be multiple rows in other examples. So that the stress on the surface of the tibia 200 can be more dispersed, and the time for the patient to go down the ground after the operation can be accelerated.
In one embodiment, the first shaft portion 121 has a plurality of second through holes 1211, the plurality of second through holes 1211 are spaced apart, and the second shaft portion 122 also has a plurality of third through holes 1221, the plurality of third through holes 1221 being spaced apart. Similarly, the second and third through holes 1211 and 1221 are also used to pass a bone anchor therethrough to secure the shaft portion of the bone plate 100 to the tibia or femur. Specific bone anchor types and connection means are described above and will not be repeated here.
In a specific example, as shown in fig. 1, the columns of the second plurality of through holes 1211 and the columns of the third plurality of through holes 1221 are relatively parallel, so that the stresses on the surface of the tibia or femur can be further dispersed, which helps to speed the time to the patient's post-operatively.
In one embodiment, any one or more of the head portion 110, shaft portion 120, and connecting portion 130 of the bone plate 100 has a plurality of projections 150 on an outer surface proximate the bone. The protruding portion 150 can increase the friction between the bone plate 100 and the bone, further strengthen the firmness of the bone plate 100 when fixing the bone, in addition, the existence of the protruding portion 150 can make the bone surface and the bone plate 100 have a plurality of pores, which is more beneficial to the growth of periosteum and also improves the growth speed of the bone.
For example, FIG. 6 shows a rear view of a bone plate without a clamping tongue, wherein the head portion 110, the shaft portion 120, and the connecting portion 130 of the bone plate 100 are uniformly provided with protrusions 150 adjacent to the outer surface of the bone. Of course, in other examples, the plurality of protrusions 150 may be provided only on the outer surface of the head portion 110 and the shaft portion 120 proximate to the bone, or the plurality of protrusions 150 may be provided only on the head portion 110, or the plurality of protrusions 150 may be provided only on the shaft portion 120. Similarly, the bone plate 100 with the locking tabs is positioned adjacent to the outer surface of the bone so that the bosses 150 are not described in detail herein.
In one specific example, the plurality of protrusions 150 are evenly distributed to maintain consistent periosteum growth rates throughout and to increase the post-operative time of the patient.
In summary, the bone fracture plate provided by the invention is integrally designed in a p-shape, the curvature of the plate body is designed according to a bone planing curve, the bone fracture plate can be fully attached to the surface of a bone, the bone fracture plate has the anti-torsion and anti-rotation performances, the bone fracture plate can be immediately and firmly fixed after operation, the fixation firmness of the bone fracture plate is further improved, and the bone healing time is greatly shortened.
It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like in the above description are directional or positional relationships as indicated based on the drawings, merely to facilitate description of embodiments of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting embodiments of the 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 one or more such feature. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless explicitly defined otherwise.
In the embodiments of 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, mechanically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. 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 embodiments of the invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present 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. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.