KR102190433B1 - Bow-leg revising structure - Google Patents

Abstract

The fin leg correction structure according to the present invention extends from the ankle of the fin leg toward the femur, and when viewed from the side, the fibular has a boundary line facing the cartilage obliquely from the cartilage under the femur in the hoof leg; It has a wedge-shaped opening that extends along the fibula around the fibula and contacts the cartilage, opens from the opposite side of the fibula and gradually closes toward the fibula, and when viewed from the side, the opening end point of the opening is located around the perimeter of the fibula. Tibial; And an implant that is coupled to the tibia and connects the upper portion and the lower portion of the opening in the tibia.

Description

Bended leg correction structure {BOW-LEG REVISING STRUCTURE}

The present invention relates to a fin leg correction structure for attaching an implant to the tibia of a fin leg during application of a proximal tibial osteotomy (HTO) to a fin leg of the human body.

In general, the human body is caused by at least one of a congenital or acquired cause. The congenital cause may be a parental hereditary factor, rickets due to vitamin D deficiency, congenital cerebral palsy, congenital polio, or racial factors. The acquired cause may be a bad posture maintained in life, a habitual bad gait during gait, or lack of exercise.

The flipped leg is divided into a saddle leg (='X' leg) or a patchwork leg (='O' leg). Here, the normal leg of the human body 8 starts from the contact between the pelvic bone 6 and the femur 4 as shown in FIG. 1(a), and the knee between the femur 4 and the tibia 2 It is located along a reference line R extending vertically to the ankle (not shown in the drawing) of the human body 8.

In contrast, the long leg of the human body 8 is the knee between the femur 4 and the tibia 2 from the reference line R of the normal leg as shown in FIG. 1(b). It is formed by displacing it inward (S1). In addition, the saddle leg of the human body 8 is the knee between the femur 4 and the tibia 2 from the reference line R of the normal leg as shown in FIG. 1 (c). It is formed by displacing it outward (S2).

The spine (not shown in the drawing) of the human body 8 has a cervical and lumbar vertebrae protruding forward in an S-line from above and below the ribs (not shown in the drawing) of the human body 8 when viewed from the side. The long leg or saddle leg is the lordosis of the spine in which the spine is excessively pushed forward of the human body 6, or the kyphosis of the spine in which the spine is excessively pushed to the rear of the human body 8, or It causes only the side of the spine to be pushed excessively.

Nowadays, in order to correct the long leg or saddle leg, a proximal tibial osteotomy (HTO) is widely applied to the bent leg of the human body 8. The proximal tibial osteotomy is performed by cutting the tibia 20 of the human body 8 and attaching a bone plate around the incision site of the tibia 2. Meanwhile, the bone plate is conventionally disclosed in Korean Patent Publication No. 10-1522158. It was initiated as a technology.

In the prior art, the bone plate is used to stabilize fractures or damage of bone, or weakened portions of bone. To this end, the bone plate has a spatula shape and has a spatula jaw and a straight handle. The spatula jaw is located at one end of the straight handle and is fixed to the handle and faces one surface of the handle. However, when considering the shape of the tibia in the human body, the bone plate has a limitation in being universally used in various parts of the tibia in proximal tibial osteotomy of the tibia.

In addition, when the bone plate is applied to the tibia of the human body after proximal tibial osteotomy, a material that receives the load of the human body and deforms itself by static load or fatigue load depending on the usage time or treats the tibia into a desired shape is disclosed. It is difficult to apply to proximal tibia osteotomy because it cannot be done. Thereafter, the present invention describes the correction of the field stile, and the correction of the saddle leg can be developed by the same technique.

Korean Patent Publication No. 10-1522158

The present invention,

It was devised to solve the conventional problem,

During the application of the proximal tibia osteotomy to the human tibia, it is universally freely attached to various parts of the tibia according to the shape of the tibia,

After applying the proximal tibia osteotomy, even if the human body loads intermittently, it maintains its initial shape appropriately and treats the tibia in the desired shape,

It is an object of the present invention to provide a forearm correction structure including an implant suitable for minimizing the magnitude of static load applied to other bone components located around the tibia after application of the proximal tibial osteotomy and while receiving a load on the human body.

The fin leg correction structure according to the present invention extends from the ankle of the fin leg toward the femur so that it is used to implement a proximal tibial osteotomy (HTO) on the fin leg in order to correct the fin leg of the human body, and when viewed from the side , Fibular having a boundary line which is separated from the cartilage under the femur at the bend leg and obliquely faces the cartilage; It has a wedge-shaped opening that extends along the fibula around the fibula to contact the cartilage, and is opened from the opposite side of the fibula and is gradually closed toward the fibula. A tibial for positioning the end of the opening in the opening; And an implant coupled to the tibia to connect an upper portion and a lower portion of the opening in the tibia, and the implant is made of a superelastic material including nickel (Ni) and titanium (Ti). , It is characterized in that the protrusion from the opening of the tibia.

The fibula, when receiving a load of the human body through the femur, forms a triangular isosceles in the tibia and femur, and has an acute angle between the individual sides of the isosceles and the base of the triangle, before performing the proximal tibial osteotomy The stress received after execution can be small compared to the stress received.

In the tibia, when viewed from the side, the opening end point of the opening may be positioned at the same level as the boundary line in the fibula, a level lower than the boundary line, or a level higher than the boundary line.

The tibia may extend more than the fibula based on the ankle of the bent leg, and may have an inlet of the opening under the boundary line of the fibula.

The tibia may incise at least half the width of the tibia through the opening in the periphery of the fibula, and may have the opening inclined while having an entrance of the opening under the boundary line of the fibula.

When viewed perpendicular to the longitudinal direction of the implant, the tibia may contact the implant with a greater width at the upper portion of the tibia than at the lower portion of the opening.

The implant, when viewed along the extension direction of the tibia, rises from the lower portion of the opening in the tibia, forms an apex on the opening of the tibia, and inclines from the tibia toward the upper portion of the opening. Can be settled.

The implant, when viewed along the extension direction of the tibia, includes a body portion, a neck portion, and a head that are sequentially arranged, and the body portion, the neck portion, and the head portion have a'T' shape on the tibia and the ' A vertically convex bend may be formed from a lower side of the T'shape toward an upper side, and a horizontally convex bend may be achieved at the upper side of the'T' shape.

When viewed along the extension direction of the tibia, the body portion and the neck portion may form a larger angle between the neck portion and the tibia than the angle between the body portion and the tibia.

The body portion may extend toward the opening from the lower portion of the opening in the tibia to partially overlap the opening, and may be smaller than the width of the tibia when viewed at a right angle to the extending direction of the tibia.

The neck portion may extend toward the opening from the upper portion of the opening in the tibia to partially overlap the opening, and may have the same width as the body portion when viewed at a right angle to the extension direction of the tibia. .

The head portion is located on the neck portion at the upper portion of the opening of the tibia, and may have a larger width than the body portion or the neck portion when viewed at a right angle to the extension direction of the tibia.

The head includes a left head, a middle head, and a right head along the boundary line of the fibula around the fibula, and the left head and the right head A predetermined angle is formed with respect to the head and is positioned along the bend of the upper portion of the opening in the tibia, so as to contact the tibia together with the intermediate head.

The left head, the middle head, and the right head define an edge line at an end inclined toward the left head from the right head near the cartilage when viewed along the boundary line of the fibula, and the implant When the edge line is matched to the hypotenuse of a right-angled triangle spreading toward the longitudinal direction of, the acute angle of the right-angled triangle is formed in the right-hand portion, and under the base of the trapezoid spreading at right angles to the longitudinal direction of the implant When the edge line is associated with the remaining side of the trapezoid, both angles between the remaining sides of the trapezoid may be the same or different.

The body portion, the neck portion, and the head portion define a plurality of first coupling holes through the body portion, the neck portion, and the head portion, define one second coupling hole through the body portion, and 1 The coupling hole penetrates the body portion, the neck portion, and the head portion and opens toward different directions from the body portion, the neck portion, and the head portion, and the second coupling hole is a ball along the length direction of the implant. In this case, the plurality of first coupling holes may have a larger diameter than the individual first coupling holes.

The body portion, the neck portion, and the head portion, when viewed at right angles to the longitudinal direction of the implant, the first groove (groove) located between the two first coupling holes in the body; A second groove positioned between the body and the neck; And a third groove positioned between the neck portion and the head portion may be further defined.

The body portion may further define a chamfer groove so as to gradually deepen while extending toward the central region of the body portion, starting from each edge of the body portion individually at both edges of the body portion along the longitudinal direction of the implant and extending toward the central region of the body portion.

The hysteresis curve of the implant may surround the hysteresis curve of the bone in the vicinity of the hysteresis curve of the bone in the human body when looking at the change of the strain according to the stress of the human body.

The implant may include at least one of an alloy metal, a superelastic plastic, and a superelastic polymer in the superelastic material.

The bent leg correction structure according to the present invention forms a wedge-shaped opening in the tibia while applying the proximal tibia osteotomy to the tibia of the human body, and attaches a'T'-shaped implant to the lower and upper portions of the opening in the tibia, and ' Proximal tibial osteotomy on the tibia of the human body by providing the body, neck, and head from the lower side of the T'shape toward the upper side. It can be universally freely attached to various parts of the tibia during application of the tibia depending on the shape of the tibia.

The bent leg corrective structure according to the present invention includes nickel (Ni) and titanium (Ti) in a'T'-shaped implant attached to the lower and upper portions of the opening in the tibia after applying proximal tibia osteotomy to the tibia of the human body. Since it shows a hysteresis curve similar to that of a human bone by applying an elastic material, the initial shape of the implant is appropriately applied even if the body's load is intermittently applied to the tibia by using the property without permanent deformation when removing static or fatigue loads from the implant. By maintaining, the tibia can be treated in a desired shape.

The curved leg correction structure according to the present invention, when viewing the side of the fibula located around the tibia, locates the end point of the opening of the wedge-shaped opening located in the tibia in the proximal tibia osteotomy around the boundary line of the fibula, The maximum load generated at the opening end point of the opening in the tibia is smoothly distributed around the tibia during the static load or fatigue load of the human body after the application of, thereby reducing the stress received from the fibula, cartilage and femur.

1 is a schematic diagram comparing the bone structure of a normal leg and a fin leg of a human body to apply the prior art.
2 is a schematic diagram partially showing a bone structure of a human body to which a fin leg correction structure according to the present invention is applied.
3 is a graph showing hysteresis characteristics of an implant in the fin leg correction structure of FIG. 2.
FIG. 4 is a front perspective view showing the implant in the fin leg correction structure of FIG. 2.
5 is a rear view partially showing the implant of FIG. 4.
6 is a rear perspective view showing the implant of FIG. 4.
7 is a front perspective view showing a first modified example of the implant of FIG. 4.
8 is a front perspective view showing a second modified example of the implant of FIG. 4.
9 to 14 are schematic diagrams for explaining a method of applying the fin leg correction structure according to the present invention to the bone structure of the human body.

For detailed description of the present invention to be described below, reference is made to the accompanying drawings, which illustrate specific embodiments in which the present invention may be practiced. These embodiments are described in detail enough to enable a person skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different from each other, but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention in relation to one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description to be described below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scopes equivalent to those claimed by the claims. In the drawings, similar reference numerals refer to the same or similar functions over several aspects, and the length, area, thickness, and the like may be exaggerated and expressed for convenience.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to enable those skilled in the art to easily implement the present invention.

1 is a schematic diagram comparing the bone structure of a normal leg and a fin leg of the human body to apply the prior art, and FIG. 2 is a schematic diagram partially showing the bone structure of a fin leg of the human body to which the fin leg correction structure according to the present invention is applied And FIG. 3 is a graph showing hysteresis characteristics of an implant in the forearm correction structure of FIG. 2.

In addition, FIG. 4 is a front perspective view showing the implant in the bend leg correction structure of FIG. 2, FIG. 5 is a rear view partially showing the implant of FIG. 4, and FIG. 6 is a rear perspective view showing the implant of FIG. 4.

Referring to Figures 1 to 6, the fin leg correction structure 70 according to the present invention is used to implement a proximal tibial osteotomy (High Tibial Osteotomy; HTO) on the fin leg to correct the fin leg of the human body. Here, the fin leg correction structure 70, as shown in FIG. 2, includes a fibular 10, a tibial 30, and an implant 50.

The fibula 10, in FIG. 2, extends from the ankle of the hoof leg toward the femur 90, and when viewed from the side, the fibular bone 10 is separated from the cartilage 80 under the femur 90 at the hoofed leg, and the cartilage 80 It has a boundary line (FIG. 12B) facing obliquely. The tibia 30, in FIG. 2, extends along the fibula 10 around the fibula 10 and contacts the cartilage 80.

The tibia 30, referring to FIGS. 2 and 12, has a wedge-shaped opening 25 that is opened from the opposite side of the fibula 10 and is gradually closed toward the fibula 10, when viewed from the side , The opening end point (P in FIG. 12) of the opening 25 is positioned around the boundary line B of the fibula 10. More specifically, the tibia 30, when viewed from the side, is at the same level as the boundary line (B) in the fibula 10, or at a level lower than the boundary line (B) or at a level higher than the boundary line (B). Position the opening end point (P) of (25).

The tibia 30, in FIG. 2, extends more than the fibula 10 based on the ankle of the forearm, and has an entrance of the opening 25 under the boundary line B of the fibula 10. The tibia 30, in FIG. 2, cuts the width of the tibia 30 through the opening 25 around the fibula 10, and the opening 25 under the boundary line B of the fibula 10 The opening 25 is provided inclined while having an inlet of. The tibia 30, in FIG. 2, when viewed perpendicular to the longitudinal direction of the implant 50, the tibia 30 is in contact with the implant 50 at a greater width than the lower portion of the opening 25 do.

Meanwhile, in FIG. 2, the implant 50 is coupled to the tibia 30 to connect the upper portion and the lower portion of the opening 25 in the tibia 30. Here, the tibia 30 and the implant 50 are coupled through a screw member 60. The implant 50 is made of a superelastic material including nickel (Ni) and titanium (Ti), and is raised from the opening 25 of the tibia 30 as shown in FIG. 2.

The implant 50 is a superelastic material, and as shown in FIG. 3, preferably, it may be nitinol made of nickel (Ni) and titanium (Ti). The hysteresis curve of the implant 50 is, in FIG. 3, when the change of the strain according to the stress (steress) during the load of the human body is viewed, the hysteresis of the bone around the hysteresis curve of the bone in the human body Surround the curve Accordingly, the implant 50 exhibits an elongation rate similar to that of a human bone while receiving a load of the human body.

In FIG. 2, when viewed along the extension direction of the tibia 30, the implant 50 rises from the lower portion of the opening 25 in the tibia 30 and is apex on the opening 25 of the tibia 30 ( While forming a 頂點), the tibia (30) tilts toward the upper part of the opening (25) and is seated.

The implant 50 includes a body portion 42, a neck portion 44, and a head portion 49 that are sequentially arranged in consideration of FIGS. 2 and 4 when viewed along the extension direction of the tibia 30 do. The body portion 42, the neck portion 44, and the head portion 49 have a'T' shape on the tibia 30 and have a'T' shape from the lower side to the upper side, considering FIGS. 2 and 4 It forms a convex curve vertically toward the side and a convex curve horizontally at the upper side of the'T' shape.

Here, the body portion 42 and the neck portion 44, as shown in Figure 4, when viewed along the extension direction of the tibia 30, in a triangle (ΔA1A2A3), the body portion 42 and the tibia ( The angle between the neck 44 and the tibia 30 is larger than the angle α1 of 30). 2 and 4, the body portion 42 extends from the lower portion of the opening 25 toward the opening 25 in the tibia 30 to partially overlap the opening 25, and partially overlaps the tibia ( When viewed at right angles to the direction of extension 30), it is smaller than the width of the tibia 30.

2 and 4, the neck portion 44 extends toward the opening 25 from the upper portion of the opening 25 in the tibia 30 to partially overlap the opening 25, and the tibia 30 ) Has the same width as the body portion 42 when viewed at right angles to the extension direction. 2 and 4, the head 49 is located on the neck 44 at the upper portion of the opening 25 of the tibia 30, and is viewed at a right angle to the extension direction of the tibia 30 In this case, it has a larger width than the body portion 42 or the neck portion 44.

The head 49 is, in Figure 5, along the boundary line (B) of the fibula 10 around the fibula 10, the left side (左便) head 46 and the middle (中間) head 47 and It includes a post (右便) head (48). The left head 46 and the right head 48 form a predetermined angle with respect to the middle head 47 and are positioned along the bend of the upper portion of the opening 25 in the tibia 30, so that the middle head 47 ) And contacts the tibia (30).

Here, the left head 46, the middle head 47 and the right head 48 are cartilage 80 when viewed along the boundary line B of the fibula 10, as shown in FIG. 5 An edge line (L) is defined at an end inclined from the right-hand side 48 toward the left-hand side head 46 in close proximity.

The left head 46, the middle head 47 and the right head 48 are the hypotenuses B1 and B3 of a right triangle (ΔB1B2B3) extending toward the length direction of the implant 50 in FIG. 5. When matching the edge line L to ), an acute angle β of a right triangle ΔB1B2B3 is formed in the right-hand portion 48.

The left head 46, the middle head 47, and the right head 48 are, in FIG. 6, the base of a trapezoid extending at right angles to the length direction of the implant 50 (for example, a dashed-dotted line ( C1, C4)) When matching the edge line (L) to the remaining sides of the trapezoid (C1, C2, C3, C4) below, the angle between the remaining sides of the trapezoid (C1, C2, C3, C4) (γ1) , γ2) have the same or different.

In addition, the body portion 42, the neck portion 44 and the head portion 49, in FIG. 4, through the body portion 42, the neck portion 44, and the head portion 49, a plurality of first coupling holes ( H1) is defined, and one second coupling hole H2 is defined through the body portion 42. The plurality of first coupling holes H1, in FIG. 4, penetrate through the body portion 42, the neck portion 44, and the head portion 49, and the body portion 42, the neck portion 44, and the head portion 49 ) In different directions.

In FIG. 4, the second coupling hole H2 has a larger diameter than the individual first coupling holes H1 in the plurality of first coupling holes H1 when viewed along the longitudinal direction of the implant 50.

7 is a front perspective view showing a first modified example of the implant of FIG. 4.

Referring to FIG. 7, the implant 50A has a structure similar to the implant 50 of FIG. 4. However, in the implant 50A, the body portion 42A, the neck portion 44A, and the head portion 49A, when viewed at a right angle to the longitudinal direction of the implant 50A, are two first in the body portion 42A). A first groove 41 positioned between the coupling hole H1, a second groove 41 positioned between the body 42A and the neck 44A, and the neck 44A and the head 49A The third groove 41 positioned therebetween is further defined. The first to third grooves 41 add elasticity to the implant 50A.

8 is a front perspective view showing a second modified example of the implant of FIG. 4.

Referring to FIG. 8, the implant 50B has a structure similar to the implant 50 of FIG. 4. However, in the implant 50B, the body portion 42B starts at both edges of the body portion 42B and starts close to the neck portion 44B individually along the length direction of the implant 50B, and the body portion 42B The chamfer groove 43 is further defined to gradually deepen while extending toward the central area of the. The chamfered groove 43 adds elasticity to the implant 50B.

9 to 14 are schematic diagrams for explaining a method of applying the fin leg correction structure according to the present invention to the bone structure of the fin leg of the human body.

Referring to FIGS. 9 to 14, in a human body's bend leg, for example, a field jang leg, the tibia 30 and the femur 90 may form an isosceles triangle as shown in FIG. 9 with the cartilage 80 as a vertex. The isosceles triangle can achieve the same acute angle δ at the end of the tibia 30 and the end of the femur 90. In this case, the long leg may cause abrasion of the cartilage 80 and destruction of the cartilage plate by overloading the cartilage 80 between the tibia 30 and the femur 90 while intermittently under the load of the human body. .

Therefore, in order to correct the long leg, it is possible to perform a high tibial osteotomy (HTO) using the bent leg correction structure 70 on the tibia 30. The bent leg correction structure 70 includes the fibula 10, the tibia 30 and the implant 50 under the femur 90 as shown in FIG. 10, and the tibia 30 is brought into contact with the implant 50 to make the tibia ( 30) and the implant 50 may be formed as shown in FIGS. 11 and 12 by combining the screw 60.

During the proximal tibial osteotomy, a wedge-shaped opening 25 is formed in the tibia 30 as shown in FIG. 11, and a plurality of screws are formed at the lower and upper portions of the opening 25 in the tibia 30. The receiving hole H3 may be formed as shown in FIG. 11. Here, the opening 25 of the tibia 30 may be located around the boundary line B of the fibula 10 in various embodiments as shown in FIG. 12 using the bone structure of the fin legs in simulation.

That is, the opening end point P of the opening 25 in the tibia 30 is, for example, compared with the boundary line B of the fibula 10 to determine the correct position of the opening 25, the fibular 10 ) May be located at the same level as the boundary line (B). In addition, the opening end point P of the opening 25 in the tibia 30 is, for example, compared to the boundary line B of the fibula 10 to determine the lower end position of the opening 25, the fibular 10 ) May be located at -3.5mm or -10mm from the boundary line (B) toward the lower boundary line.

In addition, the opening end point P of the opening 25 in the tibia 30 is, for example, compared to the boundary line B of the fibula 10 to determine the upper end position of the opening 25, the fibular 10 ) May be located at +6mm from the boundary line (B) toward the boundary line (B). Accordingly, in FIG. 13, the proximal tibial osteotomy (HTO)-before surgery belongs to the fin leg correction structure according to the comparative example in which no opening is formed in the tibia. The proximal tibial osteotomy (HTO)-postoperative opening end point-fixed position, opening end point-lower position (= -3.5mm), opening end point-lower end position (= -10mm), and opening end point-upper position (= +6mm) ) Belongs to the fin leg correction structure according to the embodiment of the present invention.

The graph of FIG. 13 shows that when the isosceles triangle of FIG. 10 has an acute angle (δ) at the distal end of the tibia 30 and the distal end of the femur 90, the tibia while receiving a weight condition (= 80 kgf) as a load of the human body It is a result obtained by using a simulator for stress applied to the fibula 10, cartilage 80, and ankle located around the tibia 30 along with 30. In this case, the load of the human body is a static load in FIG. 13, but in consideration of the movement of the human body, it may be extended to a fatigue load instead of the static load.

In the graph of FIG. 13, the fibula 10 forms a triangular isosceles in the tibia 30 and the femur 90 when a self-weight condition (= 80 kgf) is applied as a load of the human body through the femur 90 By having an acute angle (δ) between the individual sides of the isosceles and the base of the triangle, the stress received after performing the proximal tibial osteotomy can be reduced compared to the stress received before performing the proximal tibial osteotomy. After performing the proximal tibial osteotomy, a small stress on the fibula 10 may reduce the pain of a patient with a bent leg. Here, the stress (stree), as shown in Figure 14, Von mises equivalent stress (Von mises equivalent stress).

In addition, the fibula 10, as shown in Figure 13, when the weight condition (= 80 kgf) is applied as a load of the human body through the femur 90, the tibia 30 and the femur 90 are triangular If the angle between the individual side of the isosceles and the base of the triangle is an acute angle (δ), after performing the proximal tibia osteotomy, under the boundary line (B) of the fibula 10 or below the boundary line (B) of the fibula (10) ), the opening end point P of the opening 25 of the tibia 30 is provided at the same position as the opening end point of the opening 25 of the tibia 10 on the boundary line B of the fibula 10 compared to the applied stress ( With P), the applied stress can be small.

In addition, when the tibia 30 is applied with a self-weight condition (= 80 kgf) as a load of the human body through the femur 90, the tibia 30 and the femur 90 form a triangular isosceles, and the individual sides of the isosceles If the angle between the and the base of the triangle has an acute angle (δ), after performing the proximal tibia osteotomy, the opening end point (P) of the opening 25 of the tibia 30 is provided under the boundary line (B) of the fibula 10 Accordingly, the applied stress may be reduced by providing the opening end point P of the opening 25 of the tibia 30 on the boundary line B of the fibula 10 compared to the applied stress.

Here, the cartilage 80 and the ankle also have a phenomenon similar to the fibula 10 or the tibia 30.

10; Fibula, 25; Opening
30; tibia. 50; Implant
60 screw member, 70; Bended bridge correction structure
80; Cartilage, 90; femur

Claims (19)

In the fin leg correction structure that implements a proximal tibial osteotomy (HTO) on the fin leg to correct the fin leg of the human body,
A fibular (fibular) having a boundary line that extends from the ankle of the bent leg toward the femur, and when viewed from the side, is spaced from the cartilage under the femur at the bend leg to obliquely face the cartilage;
It has a wedge-shaped opening that extends along the fibula around the fibula to contact the cartilage, is opened from the opposite side of the fibula and is gradually closed toward the fibula, and when viewed from the side, around the boundary line of the fibula A tibial for positioning the end point of the opening in the opening; And
It is coupled to the tibia and includes an implant connecting the upper portion and the lower portion of the opening in the tibia,
The implant,
Made of a superelastic material containing nickel (Ni) and titanium (Ti), and raised from the opening of the tibia,
When viewed along the extension direction of the tibia,
Including a body portion, a neck portion and a head portion arranged in sequence,
The body part, the neck part, and the head part have a'T' shape on the tibia and form a vertically convex curve from the lower side of the'T' shape toward the upper side, and the upper side of the'T' shape In a horizontally convex bend, a fin leg correction structure.
The method of claim 1,
The fibula, when receiving a load of the human body through the femur, forms a triangular isosceles in the tibia and the femur, and has an acute angle between the individual sides of the isosceles and the base of the triangle, the proximal tibia osteotomy A structure for correcting a warped leg that has a smaller stress received after performing compared to the stress received before performing the operation.
The method of claim 1,
The tibia, when viewed from the side, locates the opening end point of the opening at the same level as the boundary line in the fibula, a level lower than the boundary line, or a level higher than the boundary line.
The method of claim 1,
The tibia, based on the ankle of the fibula, extends more than the fibula, and has an inlet of the opening under the boundary line of the fibula.
The method of claim 1,
The tibia,
By incising at least half the width of the tibia through the opening around the fibula,
Bend leg correction structure having an inlet of the opening under the boundary line of the fibula and having the opening inclined.
The method of claim 1,
The tibia,
When viewed perpendicular to the length direction of the implant,
In the tibia, the upper part of the opening is in contact with the implant with a greater width than the lower part of the opening.
The method of claim 1,
The implant,
When viewed along the extension direction of the tibia,
In the tibia, while rising from the lower portion of the opening, forming an apex on the opening of the tibia, a bent leg correction structure inclined toward the upper portion of the opening in the tibia and seated.
delete The method of claim 1,
The body portion and the neck portion,
When viewed along the extension direction of the tibia,
The front leg correction structure that forms a larger angle at the angle between the neck and the tibia than the angle between the body and the tibia.
The method of claim 1,
The body part,
Extending toward the opening from the lower portion of the opening in the tibia to partially overlap the opening,
When viewed at right angles to the extension direction of the tibia, the fin leg correction structure that is smaller than the width of the tibia.
The method of claim 1,
The neck part,
Extending toward the opening from the upper portion of the opening in the tibia to partially overlap the opening,
When viewed at right angles to the extending direction of the tibia, the wing leg correction structure having the same width as the body portion.
The method of claim 1,
The head,
It is located on the neck at the upper portion of the opening of the tibia,
When viewed at right angles to the extension direction of the tibia, the wing leg correction structure having a larger width than the body portion or the neck portion.
The method of claim 1,
The head portion includes a left side (左便) head, a middle (中間) head, and a right (右便) head along the boundary line of the fibula around the fibula,
The left head and the right head are formed at a predetermined angle with respect to the middle head and are positioned along the curvature of the upper portion of the opening in the tibia to contact the tibia together with the middle head.
The method of claim 13,
The left head, the middle head, and the right head,
When viewed along the boundary line of the fibula, an edge line is defined at an end inclined from the right head to the left head near the cartilage,
When the edge line is matched to the hypotenuse of a right triangle spreading in the longitudinal direction of the implant, an acute angle of the right triangle is formed in the right-side head,
When the edge line is matched to the remaining side of the trapezoid under the bottom side of the trapezoid extending at right angles to the length direction of the implant, the wing leg correction structure having the same or different angles between the remaining sides of the trapezoid.
The method of claim 1,
The body portion, the neck portion and the head portion,
Defining a plurality of first coupling holes through the body portion, the neck portion, and the head portion,
One second coupling hole is defined through the body,
The plurality of first coupling holes penetrate through the body portion, the neck portion, and the head portion and are opened toward different directions from the body portion, the neck portion, and the head portion,
The second coupling hole is a fin leg correction structure having a larger diameter than the individual first coupling holes in the plurality of first coupling holes when viewed along the length direction of the implant.
The method of claim 15,
The body portion, the neck portion and the head portion,
When viewed at right angles to the longitudinal direction of the implant,
A first groove positioned between two first coupling holes in the body;
A second groove positioned between the body and the neck; And
A fin leg correction structure further defining a third groove positioned between the neck and the head.
The method of claim 15,
The body part,
According to the longitudinal direction of the implant,
A fin leg correction structure further defining a chamfered groove so as to gradually deepen while extending toward the central region of the body portion starting from the respective edges of the body portion near the neck portion.
The method of claim 1,
The hysteresis curve of the implant is,
When looking at the change of the strain according to the stress of the human body,
In the human body, around the hysteresis curve of the bone, the fin leg correction structure surrounding the hysteresis curve of the bone.
The method of claim 1,
The implant is a fin leg correction structure comprising at least one of an alloy metal, a superelastic plastic, and a superelastic polymer in the superelastic material.

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