KR20220075769A - A Fixation plate apparatus for proximal tibial osteotomy - Google Patents

Abstract

The present invention relates to a fixing plate device used for proximal tibial osteotomy, wherein the fixing plate device for proximal tibial osteotomy has a screw fastening hole in the plate so that an operator can operate in an accurate position. It is possible to reduce the gap phenomenon caused by the movement of the bone plate, and since there are a plurality of screw fastening holes in the head of the bone plate, the direction of insertion of the screw is inserted in the front of the tibia, thereby reducing the risk of damage to the nerve blood vessels in the back of the tibia. have.
In addition, the fixed plate device for proximal tibial osteotomy includes a block unit, so that the angle and size can be visually checked from the outside, so that the operator can quickly apply it to the treatment site, and through the slot existing in the center of the plate body, the operator The fixing plate device can be applied to the desired position.

Description

Fixation plate apparatus for proximal tibial osteotomy

The present invention relates to a fixing plate device used for proximal tibial osteotomy, and to a fixing plate device for fixing an open tibia in proximal tibial osteotomy.

Proximal tibial osteotomy is a surgical method performed for O-leg patients with bent legs due to degenerative arthritis to correct the bent leg through osteotomy and to reduce the pain of the patient by dispersing the swelling concentrated in the joint area with arthritis. In the prior art, when performing proximal tibial osteotomy, a plate for fixing directly to the disclosed tibia is used or a support block is inserted between the disclosed tibia to support the renewed tibia. Problems that appear in the treatment process are problems in that the initiated tibia is widened a lot, causing play, or even if a support block is used in the widened tibia, the tibia cannot be properly supported, causing pain to the patient or lengthening the operation time. has a

Republic of Korea Patent No. 10-1826925

The object of the present invention, which was devised to solve the problems of the prior art, is to minimize the gap and stably support the disclosed tibia during osteotomy of the proximal tibia, thereby reducing the patient's pain and enabling a safe treatment process. have.

The present invention is a single plate body having a certain length and consists of a head, a body, and a neck part connecting the head and the body,

The head is a body with a larger width than the body, and is rounded so that the upper surface is convex and the lower surface is concave. It can be formed differently, and the neck portion is formed so that the head tension action is exerted by processing the round surface to be curved upward in the upward direction so that the plate body can be accurately seated and closely placed on the tibia-side fracture site;

The head has one or more first screw fastening holes arranged at regular intervals so that the plate body can be fixed to the proximal part of the tibia through fastening of the main screw;

The body portion includes one or more second screw fastening holes arranged at regular intervals so that the plate body can be fixed to the disclosed tibia proximal portion through fastening of the main screw, and the proximal portion of the tibia initiated through the fastening of any one or more of the main screw and the block unit; or Provided is a fixing plate device for proximal tibial osteotomy in which a slot of a long hole structure that can be fixed to the inner side of the proximal tibial part is formed.

The fixed plate device for proximal tibial osteotomy according to the present invention has a screw fastening hole in the plate so that the operator can operate in an accurate position, thereby minimizing bone play, thereby reducing the gap phenomenon caused by the movement of the support block. Since there are a plurality of screw fastening holes in the head of the shinbone, the direction of insertion of this screw is to the front of the tibia, so it is possible to reduce the risk of damage to the nerve blood vessels at the back of the tibia.

In addition, the fixed plate device for proximal tibial osteotomy according to the present invention can check the angle and size geometrically from the outside including the block unit, so that the operator can quickly apply it to the treatment site, and the slot existing in the center of the plate body Through this, the operator can apply the fixing plate device to the desired position.

1 and 2 are diagrams illustrating an embodiment of a plate body used in a fixed plate device for proximal tibial osteotomy according to an embodiment of the present invention.
3 to 6 are a perspective view (a), a plan view (b), a front view (c), and a left side view (d) of an embodiment of a plate body used in a fixed plate device for proximal tibial osteotomy according to an embodiment of the present invention; , a right side view (e), and a bottom view (f).
7 to 10 are a perspective view (a), a plan view (b), a left view (c), a front view (d), a right view (e), and a bottom view of a fixing plate device for proximal tibial osteotomy according to an embodiment of the present invention; It is a figure which shows FIG. (f).
11 is a view showing a bone screw used in a fixing plate device for osteotomy of the proximal tibia according to an embodiment of the present invention.
12 is a view showing a block unit used in the fixing plate device for osteotomy of the proximal tibial bone according to an embodiment of the present invention.
13 and 14 are diagrams showing the size and angle specifications of the plate body used in the fixing plate device for proximal tibial osteotomy according to an embodiment of the present invention.
15 and 16 are views showing the direction and angle in which the bone screw is fastened to the plate body used in the fixing plate device for proximal tibial osteotomy according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in more detail with reference to the accompanying drawings in order to explain the present invention in more detail. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

As shown in Figs. 1 to 6, the fixed plate device for proximal tibial osteotomy according to an embodiment of the present invention consists of a single plate body 100 having a constant length, the head 110, and the body 120 ) and a neck portion 130 that is a connecting portion connecting the body portion.

The plate body 100 including the head 110 and the body 120 may be made of various metal materials including titanium, and a biocompatible polymer including poly L-lactide and the like. It can be constructed so that it is fixed on the body so that it can be absorbed and removed naturally after use, so that it does not require a separate operation to remove it from the body.

The head 110 is provided as an expandable body with a larger width than the body 120, and may be formed in a substantially rectangular shape, and may be shaped to have a curved outer surface by continuous rounding with respect to the outer surface. have.

The head 110 may have one or more positioning grooves 113 on the outer surface of the head 110 to minimize the gap with the osteotomy. The position fixing groove 113 may be provided so that the bone screw can be fastened from the side part after selecting the position of the plate body in the fractured region with one side of the outer surface of the head 110 .

The head portion 110 has a neck portion 130 leading to the body portion 120 is maintained in a straight line parallel to the upper surface of the head portion 110 or tapered from the left and right sides with respect to the central axis of the head portion 110 at an inclination angle. has a shape consisting of

When the neck portion 130 forms an inclination angle, it forms an inclination angle of 70° to 100° or 80° to 100° with respect to the central axis of the head 110 .

The head 110 is preferably formed so that the upper surface is convex and the lower surface is rounded to be concave so that it can be stably seated on the side of the tibia.

The body part 120 is provided as a straight body provided flat on the same plane, and is formed in a band-shaped structure having an approximately constant width and length, and as shown in the figure, the length can be formed differently depending on the tibia fracture site. is a component

The body part 120 may be tapered at any one part in the longitudinal direction of the body part 120 while forming a part in which the width of the body part is reduced. The tapered part is 5° with respect to the central axis of the head part. to 20° or an inclination angle of 8° to 20°.

The tail of the body 120 is a combination of an arrowhead shape and a tapered shape, and may be tapered in the thickness side while being tapered in the longitudinal direction with respect to the body to have a pointed shape. The chin portion has an inclination angle of 80° to 100° or 90° to 100° with respect to the central axis of the head, so that insertion can be easily performed when the osteotomy side insertion process is required in a specific situation.

The neck part 130 is curved upwardly with respect to the side facing the head part 110, so that the tension action on the side of the head 110 connected to the body part 120 is exerted, so that the plate body 100 ) is formed so that it can be accurately seated and placed in close contact with the tibia fracture site.

A plurality of first screw fastening holes 112 are distributed in the head 110 to fix the plate body 110 to the tibia through fastening of the main screw 100 .

The first screw fastening hole 112 has one or more first screw fastening holes 112 arranged at regular intervals in the left and right longitudinal direction on the head 110 as shown in FIG. 1 , or as shown in FIG. 2 , the head One or more first screw fastening holes 112 in the part 110 and the neck part 130 may be arranged at regular intervals.

In the head 110, a plurality of guide holes 114 are formed so as not to interfere with the first screw fastening holes 112 and distributed on the head, and arranged at regular intervals between the first screw fastening holes. A plurality of guide holes may be formed.

At this time, the guide hole 114 is formed so that the insertion and fixation of the fixing pin is possible, and can be called a pin fixing hole. It is made possible and serves to guide the plate body 100 so that it can be seated in the correct position of the fractured area.

A second screw fastening hole 122 is formed in the body part 120 to fix the plate body 100 to the tibia through the fastening of the main screw 200, and one or more screw fastening holes 122 are formed in the longitudinal direction according to the formation length. This may be formed and disposed. Specifically, two or more are formed at regular intervals from the slot, and two or more are formed and arranged in the longitudinal direction according to the formation length.

Two or more second screw fastening holes 122 are formed and arranged in the longitudinal direction to fit the center with respect to the central axis of the head as shown in FIG. 2, or second screw fastening holes 122 based on the central axis of the head as shown in FIG. These can be staggered.

At this time, the first screw fastening hole 112 formed in the head 110 is formed to have the same diameter as or smaller than the second screw fastening hole 122 formed in the body 120 .

At this time, the first screw fastening hole 112 is provided as a circular hole having the same diameter with respect to the beginning of the depth of the fastening hole (the part where the screw thread is not formed and the head side is located when the main screw is fastened). It is configured so that the main screw 200 can be fastened to the position, and the second screw fastening hole 122 is a starting part (a part in which a thread is not formed) with respect to the depth of the fastening hole, the head side is located when the main screw is fastened. It is preferable to provide a round-type hole with a reduced diameter and a louder shape toward the bottom) so that when the screw 200 is fastened, the user can fasten it at a desired angle and fasten it in an accurate position. .

The head 110 is provided with a plurality of bending grooves 116 along the left and right longitudinal direction on one side to enable bending for each part of the head, so that the shape required for the specific situation of the tibia during use. , and the bending groove 116 is formed in a substantially round groove structure.

The body part 120 can adjust the seating position, such as enabling positional movement according to the seating arrangement with respect to the plate body 100 , and to minimize the gap with the proximal tibia through the fastening of the bone screw 200 . The slot 123 of the long hole structure is formed, and one or more may be formed and arranged according to the formation length.

At this time, in the case of forming one slot 123 , the slot 123 is formed over the neck 130 and the body 120 in order to move the position and increase the fixation according to the fastening of the bone screw 200 or the body 120 . It is preferable to form in

The slot 123 can be fastened to any one of the bone screw 200 and the block unit 300, so that the operator can selectively apply it according to the patient's situation.

In addition, although not shown, the plate body 110 has a first undercutting part for healing the damaged periosteum of a structure that is cut through cutting over the entire circumference of the lower surface edge, and both edges of the lower surface along the longitudinal direction of the plate body. It is possible to configure a second undercutting part for inducing blood flow that is positioned to form an inner recessed structure by spacing arrangement and cutting processing.

At this time, the first undercutting part for healing the damaged periosteum and the second undercutting part for inducing blood flow may be formed together on the plate body to have a complex structure, and sometimes the first undercutting part and the second undercutting part It is possible to have a configuration that forms only one of the two types of wealth.

Here, through the first undercutting part, it is possible to provide a space in which the damaged periosteum can be generated in a state in which the plate body 100 is closely fixed to the osteotomy site and to help the healing of the damaged periosteum, and through the second undercutting part can induce the flow of blood in the portion in close contact with the bone in a state in which the plate body 100 is closely fixed to the osteotomy site, while allowing the blood to flow smoothly, thereby exhibiting a function of assisting rapid bone bonding.

In addition, the lower surface of the plate body 100 can have a configuration including a silicone layer made of a silicone material that is not harmful to the human body while having flexibility and elasticity properties, such as forming a silicone coating layer or attaching a silicone sheet. Through this, the adhesion between the plate body 100 and the surface of the tibia osteotomy can be increased, and the cushioning function between the plate body 100 and the tibia osteotomy can be exerted, and in particular, a sense of heterogeneity according to human body application. can alleviate

Here, in Fig. 13 (a) corresponding to a plan view of the plate body 100 according to the present invention, Figs. 13 (b) and (c) corresponding to a front view, and Fig. 13 (d) corresponding to a left side view , the height H1 of the inner round of the head from the lower parallel of the body is 5 to 8 mm or 5 to 6 mm, the height H2 of the outer round of the head from the lower parallel of the body is 8 to 12 mm or 9 to 10 mm, The inner round (R1) formed from the part to the body is 90R to 100R, the outer round (R2) of the head is 85R to 95R, R3, the round (R4) of the slot is 1R to 5R or 2R to 4R, and the head is The width W is 25 to 35 mm or 28 to 35 mm, the width W1 of the slot is 2 to 10 mm or 4 to 7 mm, the slot length L1 is 5 to 15 mm or 7 to 13 mm, the overall length of the plate body (L2) is 70 to 150mm or 70 to 120mm, the thickness of the body (T1) is 2.5 to 4.0mm or 2.5 to 3.5mm based on the front, and the thickness (T2) of the head and the neck is 3.5 to 4.5 based on the front mm or 3.6 to 4.0 mm.

On the other hand, the fixed plate device for proximal osteotomy including the plate body according to the present invention having the above configuration is, as shown in Figs. It consists of a configuration including a bone screw 200 and a block unit 300 that are fastened to the 100 and fixed to the bone so that the plate body is fixedly coupled to the osteotomy site.

The plate body 100 constitutes a plate body having the above-described contents described in detail above with reference to FIGS. 1 to 6 , and will be used mutatis mutandis, and a detailed description thereof will be omitted accordingly.

As shown in FIG. 11 , the bone screw 200 includes a head part 210 and a screw part 220 extending to the head part 210 , and may be provided in various forms.

At this time, an elongated carving groove 221 may be formed in the screw unit 220 only on the outer surface of the lower end, and the elongated carving grooves may be formed in the upper portion and the outer surface of the lower end, respectively.

Through the elongated carving groove 221 protruding in the longitudinal direction, the force applied to the fractured site is reduced and has a fixing force.

Preferably, both the upper end and the lower end of the screw unit 220 are provided for the elongated carving groove in the longitudinal direction, so that the force applied to the fracture site can be reduced and the fixing force can be increased together.

At this time, the elongated engraving groove formed in the upper end of the screw part 220 provides a fixing force to be lodged in the bone plate 100 side when the screw 200 is fastened by rotation of the bone screw 200 . It is possible to provide a more increased fixing force and a stability that is not easily loosened.

The screw 200 can be made of various metal materials including titanium, etc., and is made of biocompatible polymers including poly Llactide, etc. It can be configured so that it does not require a separate operation to remove it from the body.

15 and 16, the head part 110 is fastened through a plurality of first screw fastening holes 112 arranged at regular intervals, so that both ends of the head part 110 are fastened. It can be fastened to be at a constant angle to the side.

Specifically, it is inserted and fastened according to the shape of the first screw fastening holes formed at regular intervals in the head 110, and fastened to form an inclination angle of 0° to 15° or 0° to 10° with respect to the left or right sides of both ends of the head. can be

When the bone screw is fastened at the same angle as described above, since the insertion direction of the bone screw is inserted in the front of the tibia, the risk of damage to the nerve blood vessels in the back of the tibia can be reduced.

The fastening angle of the main screw fastened with the first screw fastening holes 112 formed at regular intervals in the head 110 is 60° to 90° or 70° to 90° from the upper parallel line of the head with respect to the frontal angle. to form In addition, the fastening angle of this screw forms an external inclination angle of 90° to 120° or 90° to 100° from the upper parallel line of the head with respect to the front.

A guide pin is fixed to the guide hole, and the fastening angle of the guide pin forms an inclination angle of 60° to 90° or 70° to 90° from the upper parallel line of the head with respect to the front surface.

As shown in FIG. 12 , the block unit 300 is for a block unit for osteotomy of the proximal tibial region, is formed to taper from one side to the other, and includes a body portion 310 for insertion into the gap of the osteotomy. The body portion 310 is formed with a through hole 311 penetrating downward from the top.

The block unit 300 may be composed of various metal materials including titanium, etc., and is composed of biocompatible polymers such as poly Llactide, etc. It can be configured so that it does not require a separate operation to remove it from the body.

When the body portion 310 is inserted into the osteotomy portion, at least one side portion adjacent to or in contact with the bone of the osteotomy portion is provided with an anti-skid portion 312 for preventing sliding with the bone.

The non-slip part 312 is formed in a predetermined shape (eg, comb, uneven pattern, etc.) by physical and chemical (eg, etching, coating, etc.) methods. It is harmless to the human body and can be processed in various ways.

The body portion 310 is formed with a recessed groove 313 recessed to a predetermined depth on the bottom surface, and the recessed groove 313 is formed to be tapered from one side to the other side.

Here, the width of the left side in Fig. 12 (e) corresponding to the left side view of the block unit 300, Fig. 12 (f) corresponding to the right side view, and Fig. 12 (g) corresponding to the rear view ( W2) is 3 to 20 mm or 3 to 17 mm, the width W3 of the right side is 5 to 25 mm or 5 to 20 mm, the height H3 is 5 to 15 mm or 8 to 12 mm, and the inner round of the joining groove 313 is (R5) is formed in the size of R1 to R6 or R1 to R6.

The block unit 300 as described above has a shape that can be supported at the disclosed tibia osteotomy position, and serves to combine with the plate body 100 to prevent play and movement.

100: plate body, 110: head
112: first screw fastening hole
120: body part, 122: second screw fastening hole
130: neck portion
200: bone screw 210: head
220: screw part
300: block unit 310: body portion

Claims (14)

One plate body having a certain length is composed of a head, a body, and a neck connecting the head and the body,
The head is a body with a larger width than the body, and is rounded so that the upper surface is convex and the lower surface is concave. can be formed, and the neck portion is formed so that the tension action on the head side is exerted by processing the round surface to be curved in the upward direction so that the plate body can be accurately seated and closely placed on the tibial side osteotomy;
The head has one or more first screw fastening holes arranged at regular intervals to fix the plate body to the proximal part of the tibia through fastening of the main screw;
The body portion includes one or more second screw fastening holes arranged at regular intervals so that the plate body can be fixed to the disclosed tibia proximal portion through the fastening of the main screw, and the proximal portion of the tibia initiated through the fastening of any one or more of the main screw and the block unit; or A fixing plate device for proximal tibial osteotomy in which a slot of a long hole structure that can be fixed to the inner side of the proximal tibia is formed. According to claim 1,
The slot is formed over the neck and the body with respect to the central axis of the head, and the screw and the block unit are fastened to fix the block unit on the inside of the proximal part of the tibia,
The fixed plate device for proximal tibial osteotomy, characterized in that the tail portion of the body has a shape in which an arrowhead shape and a tapered shape are combined. According to claim 1,
According to claim 1,
The slot is formed in the body part with respect to the central axis of the head part, and the main screw is fastened to fix it to the tibia proximal part,
The fixed plate device for proximal tibial osteotomy, characterized in that the tail portion of the body has a shape in which an arrowhead shape and a tapered shape are combined. 4. The method of claim 2 or 3,
A fixing plate device for proximal tibial osteotomy in which two or more second screw fastening holes are formed at regular intervals from the slot with respect to the central axis of the head, and two or more are formed and arranged in the longitudinal direction according to the formation length. According to claim 1,
The main screws are inserted and fastened according to the shape of the first screw fastening holes formed at regular intervals in the head, and are fastened to form an inclination angle of 0° to 15° with respect to the left or right sides of both ends of the head. Device. The method of claim 1,
The head part has a shape in which the neck part leading to the body part is maintained in a straight line parallel to the upper surface of the head part or made at an inclination angle tapered from the left and right sides with respect to the central axis of the head part,
When the neck portion forms an inclination angle, the fixing plate device for proximal tibial osteotomy will form an inclination angle of 70° to 100° with respect to the central axis of the head. According to claim 1,
Forming a portion in which the width of the body decreases while forming a tapered portion at any one part in the longitudinal direction of the body,
The tapered portion is a fixed plate device for proximal tibial osteotomy to form an inclination angle of 5° to 20° with respect to the central axis of the head. According to claim 1,
The slot has a width of 2 to 10 mm and a length of 5 to 15 mm. The fixed plate device for proximal tibial osteotomy. According to claim 1,
The block unit is formed to be tapered from one side to the other, and includes a body portion for insertion into the gap of the fractured portion,
A through hole penetrating from the upper side to the lower side is formed in the body part,
The body part,
When inserted into the osteotomy, at least one side portion adjacent to or in contact with the bone on the osteotomy is provided with an anti-skid portion for preventing sliding with the bone. 10. The method of claim 9,
The block unit has a height of 5 to 15 mm, a left side width of 3 to 20 mm, and a right side width of 5 to 25 mm. A fixed plate device for proximal tibial osteotomy. The method of claim 1,
The fixing plate device for proximal tibial osteotomy is that the angle of the screw fastened to the first screw fastening hole formed at regular intervals in the head is 60° to 90° from the upper parallel line of the head based on the frontal angle. According to claim 1,
The width of the head is 25 to 35 mm, the height of the outer round of the head from the bottom parallel line of the body is 8 to 12 mm, the inner round formed from the head to the body is 90R to 100R, and the outer round is 85 to 95R and, the left and right inner rounds of the head are 25 to 50R of a fixed plate device for proximal tibial osteotomy. According to claim 1,
A plurality of guide holes arranged at regular intervals between the first screw fastening holes in the head portion,
A fixing plate device for proximal tibial osteotomy in which a guide pin is fixed to the guide hole, and the angle of fastening of the guide pin is 60° to 90° from the upper parallel line of the head with respect to the frontal angle. According to claim 1,
A fixed plate device for proximal tibial osteotomy, wherein the thickness of the head and neck is 3.5 to 4.5 mm from the front, the thickness of the body is from 2.5 to 4.0 mm from the front, and the total length of the plate body is 70 to 150 mm.

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