TW201924611A - External fixation device of knee joint which is suitable for high tibial osteotomy or knee cartilage tissue repair surgery - Google Patents

Abstract

An external fixation device of knee joint includes: a tibia upper fixation member, a tibia lower fixation member and a femur fixation member, wherein a universal connection or support formed by at least one main supporting shaft and at least one sub-supporting shaft is arranged between the tibia upper fixation member and the tibia lower fixation member, so as to respond to the high tibial osteotomy for expanding the inner side of the tibia to have various angles according to different patient's requirements. There is a joint member arranged between the tibia fixation member and the tibia upper fixation member for counteracting the pressure of femur applied to the inner side of the tibial plateau. The joint member includes a protrusion capable of relatively rolling and sliding on a receiving base of the joint member so as to respond to the rolling or traverse shifting movement of the femur on the tibial plateau when the knee joint moves. Therefore, the present invention provides an external fixation device mounted outside the patient's leg, which is suitable for high tibial osteotomy or knee cartilage tissue repair surgery.

Description

Knee joint fixation device

The present invention relates to a knee joint fixation device.

At present, in addition to the replacement of the artificial knee joint, the patient may also choose "Hy High Tibial Osteotomy" or knee cartilage tissue repair surgery to eliminate the lesion.

"High Tibial Osteotomy" (HTO) is to cut the tibia close to the upper platform and open it to form a wedge angle. By changing the axis of the knee joint to improve knee function , Remove the lesion of the patient's knee pain. After the "high tibial osteotomy", the osteotomy of the osteotomy is usually fixed in two ways. One is an internal fixation device, usually an integral metal plate is locked to the two of the truncated bone. The end is stitched and covered in the skin. In this way, the metal plate body to be fixed is implanted in the human body tissue, and the patient has any discomfort during the recovery process, in addition to the adverse side effects such as repulsion. After complete recovery, the patient must undergo another operation to disassemble the metal plate, which shows the shortcomings of the internal fixation device in the "high tibial osteotomy".

In addition to the above-mentioned internal fixation type fixation device, the current "high-level tibia osteotomy" can also be fixed by an external fixation type fixing device, such as the Chinese invention patent case CN 106420020 A, which is related to a "sacral sacral section". The external fixation device for postoperative bone surgery includes a sliding positioning rod (1), a fixing screw (4), a butterfly bolt (2) and a sliding sleeve (3); wherein the sliding positioning rod (1) The upper and lower ends respectively slide a sliding sleeve (3), and respectively fix the locking screws (4) at both ends of the cut tibia with butterfly bolts (2), and fasten the sliding sleeve (3) The sliding positioning rod (1) is defined to define a wedge angle of the posterior tibial opening (such as A or A' shown in FIG. 15). Because during the operation, depending on the condition of the patient's tibial plateau, the doctor will correct the axis of the knee by opening the angle of the paraplegic bone. As shown in Fig. 15, when the tibial cut is opened, the wedge angle (A) , A') At the same time, the perpendicular to the fixing screw (4) [that is, the mounting position of the sliding positioning rod (1)] will also change, that is, the upper and lower sliding sleeves (3) will be aligned. Since the sliding positioning rod (1) is a rigid metal rod and cannot be bent arbitrarily, it cannot be changed according to such an angle, and the installation cannot be performed, so that the structure cannot meet the needs of different patients.

Accordingly, an external fixation device for "high-level tibia osteotomy" has recently been disclosed, as shown in FIG. 16, which includes an upper fixing member (U) and a lower fixing member (D), which are fixed up and down. The pieces (U, D) are respectively coupled with a middle piece (M) by a ball portion (U1, D1), by means of the ball portions (U1, U2) for the upper and lower fixing members (U, D) and the middle The angle correspondence of the piece (M) to improve the above disadvantages of the CN 106420020 A case, but still has the following disadvantages:

1. The upper fixing member (U), the intermediate member (M) and the lower fixing member (D) are slightly in line, and the resultant force (F) of the upper tibia (T1) is transmitted completely downward along the straight line, that is, The middle piece (M) supports the upper fixing member (U) only at a single point (ie, at the ball portion (U1)), but the patient's tibial tissue has not been stabilized during the period of completion of the surgery. The cut and spread gap has not yet healed. When the patient is exercising, the weight (w) is not applied to the entire platform of the humerus (T1). Therefore, the uneven force is only caused by a single point ( That is to say, the support of the ball (U1) is easy to cause the plateau (T1) on the humerus to be generated or displaced, which changes the axis of the knee that has been corrected, which is unfavorable for the patient to recover and even causes the operation to fail.

2. Since the upper and lower fixing members (U, D) and the middle piece (M) are arranged in a straight line, the needle for limiting the fixation of the tibia is also locked in the tibia in a straight line, and cannot be locked into the tibia at multiple angles, thus The entire set of external fixtures is less stable.

When the patient chooses to apply "Knee articular cartilage tissue repair surgery", as shown in Figure 17, it is usually fixed to the femur (F) end with a bone fixation (7), and fixed with a patella fixation member (8). The tibia (T) end is connected to the femoral fixation member (7) and the patella fixation member (8) with a pivot (P), although the pivot (P) can provide the femur (F) opposite the tibia (T) The pivot (P) oscillates at the center, but according to the human body structure, when knees and underarms are bent, the lower end of the femur not only has a rolling motion with respect to the tibia, but also has a slight amount of forward sliding movement, as shown by the dotted line in Fig. 17. It is shown that since the position of the pivot (P) is fixed and only a simple rotational motion can be provided, and the slip motion between the femur (F) and the tibia (T) cannot be allowed, the patient cannot install the external fixation device. Normal high-angle knee or underarm movements cause great inconvenience in patients' postoperative life, and there is a need for improvement.

In view of this, the inventors of the present invention have added research and innovation, and have revealed that the present invention can be applied to a knee joint external fixation device which can be applied to "high-level tibia osteotomy" and "knee articular cartilage tissue repair surgery".

The present invention is directed to a knee joint fixation device, which may include: an patella fixation member, a humeral fixation member, and a femur fixation member, wherein at least one main support rod is disposed between the upper and lower fixation members of the tibia And a support rod connection or support, so that the present invention can accommodate various angles of the medial aspect of the humerus in response to different high tibial osteotomy operations; and between the femoral fixation member and the supracondylar fixation member, a joint member is provided to offset the application of the femur to the femur The pressure on the inside of the tibial plateau, the joint member having a protrusion on the socket of the joint member Rolling and sliding, in order to cope with the rolling and sliding movement of the femur on the tibial plateau during the movement of the knee joint, so that the present invention can be applied to "high tibial osteotomy" or "knee cartilage tissue repair surgery" An external fixation device mounted on the outside of the patient's leg.

The knee joint external fixation device disclosed in the present invention may include: a humeral upper fixation member, which is provided with a plurality of fixing holes, respectively for being fixed to the upper humerus upper end of the humerus at the upper end of the humerus and exposed to the human leg. In the outer pin (Pin), the supra-condylar fixation member is provided with a first connecting portion and a second connecting portion on one side of the first connecting portion; a lower tibial fixing member is provided with a plurality of fixing holes for respectively The needle is fixed on a pin (Pin) which is locked under the tibia and is exposed outside the leg of the human body. The top end of the lower tibial fixing member is provided with a third connecting portion and a first side of the third connecting portion. a fourth connecting portion; a main support rod fastened between the first connecting portion of the supra-physeal upper fixing member and the third connecting portion of the lower tibial fixing member; and a primary support rod connected to the second and fourth connecting portions.

The first support portion and the third connecting portion are respectively tightly fixed after the main support rod can be universally adjusted at the first and third connecting portions; and the secondary support rod has upper and lower ends Forming a spherical surface or a tip portion respectively, correspondingly supporting the second connecting portion of the upper tibial upper fixing member and the fourth connecting portion of the lower tibial fixing member, and being universally adjustable in the corresponding upper and fourth connecting portions Its angle.

The knee joint external fixation device disclosed in the present invention, wherein the first connecting portion of the supra-physical fixation member comprises a base disposed on the fixation member of the tibia and a fixing seat, and the fixing seat is locked on the tibia Fixing member and forming an upper ball hole with the base; the upper end of the main support rod is sleeved with an upper spherical bushing, the upper spherical bushing is provided with a shaft hole and an opening slit, and the upper spherical bushing is provided When the fixing seat is not locked to the fixation member of the tibia, the base and the solid can be The upper ball formed by the seat is freely rotatable, and the main support rod is freely axially displaceable in the shaft hole of the upper spherical bushing, and the base is locked to the fixation member of the tibia. The seat and the fixing seat are tightly fixed to the upper spherical bushing and the main support bar.

The knee joint external fixation device disclosed in the present invention, wherein the third connecting portion of the lower tibial fixing member comprises a base portion disposed on the lower tibial fixing member and a fixing seat portion, and the fixing seat portion is locked The lower tibia fixing member forms a lower hole with the base portion; the lower end of the main support rod is sleeved with a spherical bushing, and the lower spherical bushing is provided with a shaft hole and an opening slit to make the lower spherical surface The bushing is freely rotatable in the lower pocket formed by the base portion and the fixing seat portion when the fixing seat is not locked to the lower tibial fixing member, and the main supporting rod is available on the lower spherical bushing The shaft hole is freely axially displaced, and when the fixing seat is locked to the lower tibial fixing member, the base portion and the fixing seat tightly fix the lower spherical bushing and the main supporting rod.

The knee joint external fixation device disclosed in the present invention, wherein the shaft hole wall of the upper and lower spherical bushings is provided with a protruding tooth or a rough surface.

The knee joint external fixation device disclosed in the present invention, wherein the axis of each of the fixing holes of the supracondylar fixation member is at an angle of an axis line parallel to each other or at least two fixing holes. The axis line of each of the fixing holes of the lower tibial fixing member is at an angle of an axis line parallel to each other or at least two fixing holes.

The knee joint external fixation device disclosed in the present invention, wherein one side of the supracondylar fixation member is further provided with all knife tool fixing holes.

The knee joint external fixation device disclosed in the present invention, wherein the main support rod may be a solid rod body or a hollow rod body; or the main support rod is composed of a first rod body and a second rod body, so that The first and second rods can be extended and contracted in the axial direction and are radially oriented by at least one fixing screw Firmly fixing the first and second rod bodies; the outer edge of the first rod is externally threaded and screwed with a pressing nut to firmly fix the second rod body to block the first and second rod bodies Axial retraction.

The knee joint external fixation device disclosed in the present invention, wherein the hole wall of each of the fixing holes of the upper and lower tibia fixing members is provided with a protruding tooth or a rough surface, so that a pressing screw radially locks the upper part and the tibia After the fixing member of the lower fixing member, the needle can be forced to abut against the protruding tooth or the rough surface.

The knee joint external fixation device disclosed in the present invention, wherein the secondary support rod is composed of a first rod body and a second rod body being screwed together, so that the first and second rod bodies can be extended and contracted in the axial direction, wherein the first rod A tightening nut is screwed radially to the body to firmly fix the first and second rods to block the first and second rods from retracting in the axial direction.

The knee joint external fixation device disclosed in the present invention, wherein the femoral fixation member is provided with a plurality of fixing holes for fixing on a pin which is nailed into the femur and exposed outside the human leg to move with the femur; a joint member disposed between the femoral fixation member and the supracondylar fixation member, wherein the first end of the protrusion is connected to the femoral fixation member [or attached to the supracondylar fixation member], and the second end thereof is Forming a curved or spherical contact surface, and the first end of the receiving seat is connected to the tibia upper fixing member [or connected to the femoral fixing member], and the second end thereof defines a receiving surface for The second end of the protrusion abuts against the receiving surface, wherein the receiving surface has an area sufficient to allow the second end of the protrusion to roll and slide; the receiving surface may be a flat surface, a curved surface or a spherical surface. The invention is not intended to be self limiting.

The knee joint external fixation device disclosed in the present invention, wherein the protrusion or the socket of the joint member can be integrally formed and connected to the femoral fixation member or the tibia upper fixation member respectively; or the screw and the bolt are locked to the femur for fixation. The member or the tibia is attached to the member.

The desirable entities disclosed in the present invention can be clarified by the following description and the accompanying drawings.

(10) ‧‧‧Sacral fixation components

(11) ‧‧‧Fixed holes

(110)‧‧‧Axis line

(111)‧‧‧ teeth or rough surfaces

(12) ‧‧‧First Connection

(120)‧‧‧上球

(121)‧‧‧Base

(122)‧‧‧ Fixed seat

(13) ‧‧‧Second connection

(14)‧‧‧Cutter tool fixing hole

(15) ‧ ‧ tighten the screws

(20) ‧‧‧Underlying humeral fixation members

(21)‧‧‧Fixed holes

(210)‧‧‧Axis line

(211)‧‧‧ teeth or rough surfaces

(22) ‧ ‧ third connection

(220) ‧‧‧ Under the ball

(221) ‧ ‧ pedestal

(222)‧‧‧ Fixed seat

(23) ‧ ‧ fourth connection

(25) ‧ ‧ tighten the screws

(30) (30’) ‧ ‧ main support rod

(30a) (30a’) ‧ ‧ first body

(30b) (30b’) ‧‧‧Second body

(31)‧‧‧Upper spherical bushing

(311)‧‧‧Axis hole

(311a)‧‧‧Tooth or rough surface

(312)‧‧‧Open seam

(32)‧‧‧Spherical bushings

(321)‧‧‧Axis hole

(321a) ‧‧‧ teeth or rough surfaces

(322)‧‧‧Open seam

(33)‧‧‧ fixing screws

(34) ‧‧‧Forcing nuts

(35)‧‧‧ Elastomers

(40) ‧ ‧ support rods

(40a) ‧ ‧ upper end

(40b) ‧‧‧Bottom

(41)‧‧‧First body

(42)‧‧‧Second body

(43)‧‧‧Forced nuts

(50) ‧‧‧ femoral fixation members

(51) ‧‧‧Fixed holes

(60) ‧‧‧ joint components

(61) ‧‧‧

(611) ‧ ‧ first end

(612) ‧‧‧ second end

(62) ‧‧‧ socket

(621)‧‧‧ first end

(622)‧‧‧ second end

(A1, A2, A3) ‧ ‧ angle

(F) ‧ ‧ femur

(S1, S2, S3) ‧ ‧ needle

(T)‧‧‧胫骨骨

(T1) ‧ ‧ 胫 上 上

(T2) ‧ ‧ backbone

Figure 1 is an exploded perspective view of a first embodiment of the present invention.

Figure 2 is an exploded perspective view of the main support rod of the present invention.

Figure 3 is a schematic view of the planar structure of Figure 1 after combination.

Figure 4 is a perspective view of an application state mounted on a patient for the embodiment of Figure 1.

Figure 5 is a schematic view of the planar structure of Figure 4.

Fig. 6 is a schematic cross-sectional view showing the direction of 6-6 of Fig. 5.

Fig. 7 is a top plan view showing the tibia upper fixing member of the present invention.

Fig. 8 is a top plan view showing the lower tibial fixation member of the present invention.

Fig. 9 is a schematic view showing the structure of a fixing hole of the tibia upper fixing member shown in the present invention.

Fig. 10 is a schematic view showing the structure of a fixing hole of the lower tibial fixing member of the present invention.

Figure 11 is a schematic view showing the structure of a second embodiment of the present invention applied to a high tibial osteotomy and a knee cartilage tissue repair operation.

Figure 12 is a schematic illustration of the knee movement from Figure 11.

Figure 13 is a schematic view showing the structure of a third embodiment of the knee cartilage tissue repairing operation of the present invention.

Figure 14 is a schematic view showing the structure of a fourth embodiment of the present invention.

Figure 15 is a schematic illustration of the external fixation device of the first conventional high tibial osteotomy.

Figure 16: Schematic diagram of an external fixation device for the second conventional high tibial osteotomy.

Figure 17 is a schematic view showing the structure of a knee cartilage tissue repair operation.

As shown in FIGS. 1-13, the present invention relates to a knee joint fixation device for barely mounting outside a human leg, and may include: a supracondylar fixation member (10) and a subtibial fixation member ( 20), wherein at least a main support rod (30) and a primary support rod (40) are connected or supported between the upper and lower fixation members (10, 20), so that the present invention can cope with high tibial osteotomy ( HTO, High Tibial Osteotomy) depending on the patient's various angles of the medial aspect of the tibia; and the present invention may further include a femoral fixation member (50) between the femoral fixation member (50) and the supracondylar fixation member (10), A joint member (60) is coupled to define a spacing between the femur (F) and the radial bone (T) to counteract the pressure exerted by the femur (F) on the inside of the tibia (T) platform, the joint member (60) containing a a protrusion (61) and a receiving seat (62), the protrusion (61) can relatively roll and slide on the receiving seat (62), so as to cope with the femur on the tibial plateau when the human knee joint is in motion The rolling and traversing movements made the invention applicable to high tibial osteotomy or knee cartilage After the tissue repair surgery, it is installed outside the patient's leg.

As shown in FIG. 1 to 7, the external fixation device for the knee joint includes: a humeral upper fixation member (10), and a plurality of fixing holes (11) are provided for fixing to the lock above the tibia The proximal humerus platform end (T1) is exposed on a needle (S1) outside the human leg, and the patella upper fixing member (10) is provided with a first connecting portion (12) and a first connecting portion (12) a second connecting portion (13) on the side; a lower tibial fixing member (20) is provided with a plurality of fixing holes (21) for fixing to the backbone (T2) of the tibia below the tibia cutting and being exposed The lower tibial fixation member (20) is provided with a third connecting portion (22) and a fourth connecting portion (23) on a side of the third connecting portion (22); a main support rod (30) connected to the first connecting portion (12) of the supra-physeal upper fixing member (10) and the lower tibial fixation structure Between the third connecting portion (22) of the member (20); and a primary support rod (40) located at the second connecting portion (13) of the fixation member (10) of the tibia and the second fixation member (20) Between the four connections (23).

In the above, the upper and lower ends of the main support bar (30) can be universally adjusted at the first and third connecting portions (12, 22) for the first and third connecting portions (12, 22) respectively. Tightly fixed; the upper and lower ends (40a, 40b) of the support rod (40) can be adjusted in a gimbal direction on the corresponding second and fourth connecting portions (13, 23), respectively.

The upper and lower ends (40a, 40b) of the support rod (40) respectively form a spherical surface or a tip portion for correspondingly supporting the second connecting portion (13) of the upper fixation member (10) of the tibia And the fourth connecting portion (23) of the lower tibial fixing member (20) is gimbalized to adjust its angle.

As shown in FIG. 1, 2, 5 or 6, wherein the first connecting portion (12) of the supra-condylar fixing member (10) comprises a base (121) and an independent unit disposed on the tibia upper fixing member (10). The fixing seat (122) is configured to lock the fixing seat (122) to the sacral upper fixing member (10), and form an upper ball (120) with the base (121); the main supporting rod (30) The upper end is provided with an upper spherical bushing (31), the upper spherical bushing (31) is provided with a shaft hole (311) and an opening slit (312), so that the upper spherical bushing (31) is not When the fixing seat (122) is locked to the fixation member (10) of the tibia, the upper seat (120) formed by the base (121) and the fixed seat (122) can be freely rotated, and the main support The rod (30) is freely axially displaceable in the shaft hole (311) of the upper spherical bushing (31) to lock the fixing seat (122) to the tibia upper fixing member (10) (121) The upper spherical bushing (31) and the main support rod (30) are tightly fixed to the fixing base (122).

As shown in FIG. 1, 2, 5 or 6, the third connecting portion (22) of the lower tibial fixing member (20) includes a base portion (221) and a base provided on the lower tibial fixing member (20). a separate fixing seat (222), the fixing seat (222) is locked to the lower tibial fixing member (20), and the base portion (221) forming a ball hole (220); the lower end of the main support bar (30) is sleeved with a spherical bushing (32), the lower spherical bushing (32) is provided with a shaft hole (321) and an opening slit (322), the lower spherical bushing (32) is detachable from the base portion (221) and the fixed seat portion when the fixing seat portion (222) is not locked to the lower tibial fixing member (20) 222) the lower ball (220) formed is freely rotatable, and the main support rod (30) is freely axially displaceable in the shaft hole (321) of the lower spherical bushing (32), so that the fixing seat When the portion (222) is locked to the lower tibial fixation member (20), the base portion (221) and the fixing portion (222) tightly fix the lower spherical bushing (32) and the main support rod (30).

As shown in FIG. 2, the hole holes (311, 321) of the upper and lower spherical bushings (31, 32) are provided with protruding teeth or rough surfaces (311a, 321a) to engage or abut against The main support rod (30) prevents axial displacement of the main support rod (30) along the axial holes (311, 321) of the upper and lower spherical bushings (31, 32).

As shown in FIG. 7, the axis line (110) of each of the fixing holes (11) of the supra-condylar fixing member (10) is an axis line (110) which is parallel to each other or at least two fixing holes (11). At an angle (A1). The included angle (A1) is less than 140 degrees, for example, may be between 15 and 35 degrees, and most preferably 26 degrees.

As shown in FIG. 8, the axis line (210) of each of the fixing holes (21) of the lower tibial fixing member (20) is an axis line (210) which is parallel to each other or at least two fixing holes (21). At an angle (A2). The angle (A2) is less than 140 degrees, for example between 15 and 35 degrees, and most preferably 22 degrees.

As shown in FIG. 1 , one side of the humeral upper fixing member (10) is further provided with a knife tool fixing hole (14) for fixing a knife holder (not shown) for cutting the tibia. It does not require additional erecting tools for the osteotomy tool to reduce the cost of surgery.

As shown in Figures 2 and 6, wherein the main support rod (30) is composed of a first rod body (30a) and a second rod body (30b), and is radially pressed by at least one fixing screw (33). Fix the first and second poles Body (30a, 30b). The first rod body (30a) is configured to have an externally threaded portion that is screwed into one of the screw holes of the second rod body (30b) to rotationally adjust the first and second rod bodies (30a, The length of 30b), but the invention does not limit the combination of the first and second rods (30a, 30b).

As shown in FIG. 1 and 2, the knee joint external fixation device disclosed in the present invention, wherein an outer thread is formed on an outer edge of the first rod body (30a) of the main support rod (30) and a pressing nut is screwed. (34), the second rod body (30b) is tightly fixed to block the first and second rod bodies (30a, 30b) from retracting in the axial direction.

As shown in FIGS. 9 and 10, wherein the fixing holes (11, 21) of the upper and lower tibia fixing members (10, 20) are provided with protruding teeth or rough surfaces (111, 211), When a tightening screw (15, 25) radially locks the upper and lower tibia fixing members (10, 20) and presses the needles (S1, S2) located in the fixing holes (11, 21), the force is forced The needles (S1, S2) abut against the teeth or rough surfaces (111, 211). The fixing holes (11, 21) are formed with a long hole in the locking direction of the corresponding pressing screw (15 or 25), so that the needle (S1, S2) penetrates into the corresponding fixing hole (11, 21). And when the tightening screw (15 or 25) is pressed, the partial outer edge of the needle (S1, S2) can relatively engage the tooth or abut against the rough surface (111 or 211), so that the upper and lower sides The tibial fixation members (10, 20) can be tightly attached to each of the needles (S1, S2).

As shown in FIGS. 1, 3 and 5, wherein the support rod (40) is composed of a first rod body (41) and a second rod body (42), which are axially connected to each other to adjust the axial direction by relative rotation. The axial length of the support rod (40); wherein the first rod body (41) is further radially screwed with a pressing nut (43) to firmly fix the first and second rod bodies (41, 42) ) to prevent the first and second rods (41, 42) from retracting in the axial direction.

The knee joint external fixation device disclosed by the present invention, wherein the main support rod (30) is In a hollow rod body, solid or as shown in FIG. 14, the main support rod (30') is an elastic rod containing first and second rod bodies (30a', 30b'), so that the first and second rods are The bodies (30a', 30b') are axially sleeved with each other, and an elastic spacer (35) such as an elastic spacer, an elastic block or a spring is disposed between the first and second rod bodies (30a', 30b'). When the first and second body rods (30a', 30b') are fixed to the upper and lower fixation members (10, 20), the upper and lower fixation members (10, 20) of the tibia can be provided by the elastic body (35). A small amount of elastic vibration is used to stimulate the growth of bone tissue to improve the recovery rate of the cut tibia.

As shown in FIGS. 11 and 12, the knee joint external fixation device disclosed in the present invention, wherein the femoral fixation member (50) is provided with a plurality of fixing holes (51) for fixing to the femur (F) and being exposed. a joint member (60) disposed between the femoral fixation member (50) and the supracondylar fixation member (10) on the needle (S3) outside the leg to move with the femur (F), wherein the protrusion The first end (611) of (61) is connected to the femoral fixation member (50) [or attached to the tibia upper fixation member (not shown)], and the second end (612) is formed to form an arc a contact surface of the face or the spherical surface, and the first end (621) of the receiving seat (62) is coupled to the fixation member (10) of the tibia [or attached to the femoral fixation member (not shown)] The second end (622) defines a receiving surface for the second end (612) of the protrusion (61) to abut against the second end (622) of the receiving seat (62), wherein the receiving end The second end (622) of the seat (62) has an area sufficient to allow the second end (612) of the protrusion (61) to roll and slip. (In the action of the human knee and the underarm, the femur is rotated. Still sliding forward, as shown by the dotted line in Figure 12; The second end (622) of the receiving seat (62) is formed into a flat surface, a curved surface or a spherical surface, and the present invention does not limit its shape.

The knee joint external fixation device disclosed in the present invention, wherein the protrusion (61) and the socket (62) of the joint member (60) are integrally and integrally connected to the femoral fixation member (50) or the tibia upper fixation member. (10) Upper, or screwed or bolted to the femoral fixation member (50) or the tibia upper fixation member (10), the invention is not limited.

As shown in FIG. 13, when the patient performs only knee articular cartilage tissue repair surgery, the knee joint external fixation device to which the present invention is applied includes: a humeral upper fixation member (10), which is provided with a plurality of fixation holes ( 11), respectively, for fixing to a needle (S1) locked on the tibia (T) and exposed outside the human leg; a bone fixing member (50), wearing a plurality of fixing holes (51) for fixing to Nailed into the femur (F) and exposed on the needle (S3) outside the human leg to move with the femur (F); and between the femoral fixation member (50) and the metatarsal fixation member (10) a joint member (60), the joint member (60) includes a protrusion (61) and a socket (62), the protrusion (61) can relatively roll and slide on the socket (62); The first end (611) of the protrusion (61) is connected to the femoral fixation member (50) [or attached to the fixation member (not shown)], and the second end (612) is Forming a curved or spherical contact surface, and the first end (621) of the receiving seat (62) is coupled to the tibia upper fixation member (10) [or connected to the femoral fixation member (not shown)] And its second end (62 2) defining a receiving surface for the second end (612) of the protrusion (61) to abut against the second end (622) of the receiving seat (62), wherein the receiving seat (62) The second end (622) is of sufficient area to allow the second end (612) of the projection (61) to roll and slip.

The knee joint external fixation device disclosed in the present invention has the following features and advantages;

1. Supporting the humeral upper fixation member (10) with two support points of the main support rod (30) and the secondary support rod (40), that is, supporting the force on the upper tibia (T1) of the patient with multiple points, and avoiding the humerus after the operation The platform (T1) produces a flip or displacement that increases the success rate of the "high tibial osteotomy".

2. During installation, the main support rod (30) and the secondary support rod (40) can be adjusted in a gimbal direction between the upper and lower tibia fixing members (10, 20), and can be extended and contracted in the axial direction. Adjustment, in order to accommodate different angles (A, as shown in Figure 4) at different points in the fracture of the tibia.

3. The fixing holes (11, 21) on the upper and lower tibia fixation members (10, 20) are distributed corresponding to the circumference of the tibia, not on the same line, so that the needle (S1 or S2) is locked at different angles. The posterior tibia of the bone enables the external fixation device disclosed by the present invention to more stably locate the angle and position of the tibia of the patient after the osteotomy.

4. The main support rod (30) can adopt a hollow rod body, which greatly reduces the weight of the entire external fixing device, thereby reducing the patient's load and reducing the patient's discomfort.

5. When the patient underwent high tibial osteotomy and knee cartilage repair, the joint member (60) between the femoral fixation member (50) and the supracondylar fixation member (10) can be further stably opened. The distance between the femur (F) and the upper end of the tibia (T), and the joint member (60) can also adapt to the rolling and slipping motion paths generated by the femur (F) and the tibia (T) during exercise, so that the disease Suffering from normal squatting and standing movements.

6. When the patient's humerus is restored, the mandibular fixation member (20), the main support rod (30) and the secondary support rod (40) can be separately removed. After the knee joint cartilage tissue is regenerated and restored, the femoral fixation member is removed. (50) and the supracondylar fixation member (10), the present invention can be adapted to the surgical treatment method and recovery state selected by different patients in the treatment of knee joint disorders.

The structure or shape disclosed in the present invention can be modified and applied without departing from the spirit or scope of the present invention, and the present invention is not limited to the above embodiment.

Claims (16)

The utility model relates to a knee joint external fixation device, which comprises: a humeral upper fixation member, which is provided with a plurality of fixing holes, respectively for fixing to a needle locked on the upper humerus platform end and exposed outside the human leg at the upper part of the tibia cut. The upper humeral fixation member is provided with a first connecting portion and a second connecting portion on a side of the first connecting portion; a lower tibia fixing member is provided with a plurality of fixing holes for respectively being fixed to the humerus Cutting the lower tibia backbone and exposing the needle outside the leg of the human body, the lower tibial fixation member is provided with a third connecting portion and a fourth connecting portion on a side of the third connecting portion; a main supporting rod connected to the a first connecting portion of the supracondylar fixation member and a third connecting portion of the lower tibial fixing member; and a primary support rod located between the second connecting portion of the supracondylar upper fixing member and the fourth connecting portion of the lower tibial fixing member. The fixing device of the knee joint according to claim 1, wherein the upper and lower ends of the main support bar are respectively tightened at the first and third connecting portions, and the first and third connecting portions are respectively tight. Tightly fixed. The fixing device for the knee joint according to claim 1, wherein the upper and lower ends of the supporting rod are respectively adjustable in the universal direction on the corresponding second and fourth connecting portions. The knee joint external fixation device according to claim 1, wherein the first connecting portion of the supra-condylar fixing member comprises a base provided on the tibia upper fixing member and a separate fixing seat, so that the fixing seat is locked The upper sacral upper fixing member forms an upper ball hole with the base; the upper end of the main support rod is sleeved with an upper spherical bushing, and the upper spherical bushing is provided with a shaft hole and an opening slit, so that the upper ball bushing The spherical bushing can be on the base when the fixing seat is not locked to the fixation member of the tibia The upper ball formed by the fixing seat is freely rotatable, and the main supporting rod is freely axially displaceable in the shaft hole of the upper spherical bushing, so that when the fixing seat is locked on the tibia upper fixing member, The base and the fixing seat tightly fix the upper spherical bushing and the main support bar. The knee joint external fixation device according to claim 1, wherein the third connecting portion of the lower tibial fixing member comprises a base portion provided on the lower tibial fixing member and a separate fixing portion, and the fixing portion is Locking on the lower tibial fixing member, and forming a lower ball hole with the base portion, the lower spherical bushing is provided with a shaft hole and an opening slit, so that the lower spherical bushing does not lock the fixing seat portion The lower tibial fixation member is freely rotatable in the lower pocket formed by the base portion and the fixing seat portion, and the main support rod is freely axially displaceable in the shaft hole of the lower spherical bushing. When the fixing seat is locked to the lower tibial fixing member, the base portion and the fixing seat portion tightly fix the lower spherical bushing and the main supporting rod. The knee joint fixing device according to claim 4 or 5, wherein the shaft hole wall of the upper and lower spherical bushings is provided with a protruding tooth or a rough surface. The fixation device of the knee joint according to claim 1, wherein the axis of the fixing hole of the fixation member of the tibia is parallel to each other or at least at an angle of the axis of the at least two fixing holes; wherein the humerus is under the humerus The axis lines of the fixing holes of the fixing member are parallel to each other or at an angle to the axis of at least two fixing holes. The knee joint external fixation device according to claim 1, wherein the main support rod is composed of a first rod body and a second rod body, and the first and second rods are radially fixed by at least one fixing screw. body. The knee joint external fixation device according to claim 8, wherein the outer edge of the first rod is formed with an external thread and a nut is screwed to firmly fix the second rod. The knee joint external fixation device according to claim 1, wherein the wall of each of the fixing holes of the upper and lower tibia fixing members is provided with a protruding tooth or a rough surface. The fixation device of the knee joint according to claim 1, wherein the secondary support rod is composed of a first rod body and a second rod body, wherein the first rod body is screwed with a compression nut radially. The first and second rod bodies are tightly fixed to block the first and second rod bodies from retracting in the axial direction. The fixation device for knee joint according to claim 1, further comprising a femoral fixing member, the femoral fixing member is provided with a plurality of fixing holes for fixing to a needle which is nailed into the femur and exposed outside the leg of the human body; And a joint member disposed between the femoral fixation member and the supracondylar fixation member, the joint member includes a protrusion and a socket, and the protrusion can relatively roll or slide on the socket. The utility model relates to a knee joint external fixation device, which comprises: a humeral upper fixation member, which is provided with a plurality of fixing holes for respectively fixing on a needle locked on the tibia and exposed outside the human leg; a femur fixing member is worn a plurality of fixing holes for fixing to a needle which is nailed into the femur and exposed outside the leg of the human body; and a joint member disposed between the femoral fixing member and the upper fixation member of the tibia, the joint member having a protrusion and A socket that can be relatively rolled or slipped on the socket. The knee joint fixation device according to claim 12 or 13, wherein the first end of the protrusion is connected to the femoral fixation member or connected to the fixation member on the tibia, and the second end thereof is formed into a curved surface. Or a spherical contact surface, and the first end of the socket is connected to the fixation member of the tibia or connected to the femoral fixation member, and the second end of the socket is defined to form a receiving surface for the protrusion The two ends abut against the second end of the socket, wherein the socket is second The area of the end is sufficient to allow the second end of the projection to roll and slip. The knee joint fixing device according to claim 1, wherein the main support rod is an elastic rod or a hollow rod. The knee joint external fixation device according to claim 15, wherein the main support rod includes first and second rod bodies, and the first and second rod bodies are axially sleeved with each other, and the first and second rod bodies are respectively An elastic material such as an elastic spacer, an elastic block or a spring is interposed.