CN211066978U - A tibial plateau posteromedial fixation plate that can fix double columns - Google Patents

Abstract

The utility model provides an inboard fixed steel sheet behind tibial plateau of fixable twin columns, form by the integrative smooth transition of fixed steel sheet of tibial plateau articular surface and the fixed steel sheet of shin bone near-end, wholly be crooked F type structure, the fixed steel sheet of tibial plateau articular surface is including first flat steel sheet and first horizontal arc steel sheet, the fixed steel sheet of shin bone near-end is including the horizontal arc steel sheet of second and vertical steel sheet, the junction vertical connection of first flat steel sheet and first horizontal arc steel sheet has vertical steel sheet, one side that vertical steel sheet corresponds first horizontal arc steel sheet position transversely extends has the horizontal arc steel sheet of second, first flat steel sheet, first horizontal arc steel sheet, a plurality of screw holes have been seted up on the horizontal arc steel sheet of second and the vertical steel sheet. The utility model discloses a fixed steel sheet of a fixed steel sheet is fixed tibial plateau medial column and back medial column simultaneously, both reducible steel sheet use quantity to reduce the operation expense and reduce the wound, can avoid two vertical partial screw cross collision of steel sheet to break off's possibility again.

Description

A tibial plateau posteromedial fixation plate that can fix double columns

technical field

The utility model relates to the technical field of orthopaedic medical devices, in particular to a posterior medial fixation plate of a tibial platform capable of fixing double columns.

Background technique

In clinical applications, tibial plateau fractures are fractures of the proximal tibia involving the articular surface. The fracture types are more complex, and the treatment is more difficult when combined with soft tissue injuries. According to the three-column classification method of tibial plateau fractures, the fractures were classified according to the results of CT plain scan, and they were defined as lateral column, medial column, and posterior lateral column. The tibial plateau fractures often involve the medial and lateral sides of the tibial plateau, and even the medial and posteromedial columns. Most of the medial tibial plateau fractures are associated with a coronal fracture line. The medial tibial plateau is split into two or more fracture fragments, sometimes accompanied by The articular surface is collapsed, and the treatment of this type of fracture is more difficult.

For medial tibial plateau fractures involving the medial and posteromedial columns, the currently available straight or T-shaped locking plates cannot be used for simultaneous fixation of the medial and posteromedial columns. At present, the medial tibial plate and the posteromedial tibial plate are often used in clinical practice to fix the medial column of the tibial plateau and the posteromedial column, respectively. This requires the implantation of two plates, which significantly increases the economic burden of the patient. In addition, the screws in the vertical parts of the two steel plates are prone to cross collision and breakage.

How to treat cost-effectively, reduce trauma, and make patients as convenient as possible has become the main problem of orthopaedic treatment. In view of this, it is necessary to provide a posteromedial fixation plate of the tibial plateau that can fix the medial column and the posteromedial column at the same time to solve the above problems.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present utility model is to provide a double-column tibial plateau posteromedial fixation plate, using a fixed plate to fix the tibial plateau medial column and the posteromedial column at the same time, which can reduce the number of plates used and reduce the need for surgery. The cost and trauma can be reduced, and the possibility of fracture caused by the cross collision of the screws of the vertical parts of the two steel plates can be avoided.

In order to achieve the above object, the technical scheme adopted by the present utility model is:

A double-column tibial plateau posteromedial fixation plate, the fixation plate is formed by a smooth transition of the tibial plateau articular surface fixing plate and the tibial proximal tibial fixing plate, and the whole is a curved F-shaped structure, and the tibial plateau articular surface is fixed The steel plate includes a first straight steel plate that fits with the articular surface of the posterior medial tibial plateau and a first transverse arc-shaped steel plate that fits with the medial articular surface of the tibial plateau. The second transverse arc-shaped steel plate that fits and the longitudinal steel plate that is attached to the longitudinal surface of the proximal end of the tibia, and the longitudinal steel plate is vertically connected at the junction of the first flat steel plate and the first transverse arc-shaped steel plate, so the A side of the longitudinal steel plate corresponding to the position of the first transverse arc-shaped steel plate is laterally extended with the second transverse arc-shaped steel plate, the first flat steel plate, the first transverse arc-shaped steel plate, and the second transverse arc-shaped steel plate. The arc-shaped steel plate and the longitudinal steel plate are provided with a plurality of threaded holes.

Preferably, the projections of the first transverse arc-shaped steel plate and the second transverse arc-shaped steel plate on the horizontal plane are parallel to each other.

Preferably, the curvature of the first transverse arc-shaped steel plate matches the lateral surface anatomy of the medial articular surface of the tibial plateau, and the curvature of the second transverse arc-shaped steel plate matches the lateral surface anatomy of the medial surface of the proximal tibia. Matching, the length of the first transverse arc-shaped steel plate is greater than the length of the second transverse arc-shaped steel plate.

Preferably, the tibial plateau articular surface fixation plate is provided with a plurality of Kirschner wire holes at the edge of one side where it is not connected with the proximal tibial fixation plate, and the The number of the K-wire holes is greater than the number of the K-wire holes located at the first transverse arc-shaped steel plate portion.

Preferably, the portion of the longitudinal steel plate located between the first transverse arc-shaped steel plate and the second transverse arc-shaped steel plate is defined as a first longitudinal segment, and the portion between the second transverse arc-shaped steel plate and the second transverse arc-shaped steel plate is defined as a first longitudinal segment. The part of the end is defined as the second longitudinal segment, and there is an arc between the first longitudinal segment and the second longitudinal segment that matches the anatomical shape of the longitudinal surface of the proximal tibia, that is, the radius of the posteromedial column of the tibial plateau. Longitudinal arc to match.

Preferably, the length of the first longitudinal segment is smaller than the length of the second longitudinal segment.

Preferably, a sliding hole is defined on the second longitudinal section of the longitudinal steel plate, and the length of the sliding hole in the longitudinal direction of the longitudinal steel plate is greater than the length in the transverse direction of the longitudinal steel plate.

Preferably, the longitudinal steel plate is provided with a Kirschner pinhole at the end of the second longitudinal section.

Preferably, the threaded hole is one of a standard round screw hole, a multi-axis locking hole and a single-axis locking hole.

Compared with the prior art, the present utility model provides a double-column tibial plateau posteromedial fixation plate, and the first transverse arc-shaped plate contained in the fixation plate is consistent with the transverse surface anatomy of the inner articular surface of the tibial plateau. Matching, the second transverse arc-shaped plate matches the anatomical shape of the transverse surface of the medial surface of the proximal tibia, and the combination of the two can fix the medial column of the tibial plateau, and the lateral position of the plate for internal fixation is more obedient to the bone surface. The combination of the first straight plate and the longitudinal plate can fix the posteromedial column of the tibial plateau. The curvature of the longitudinal plate matches the longitudinal arc of the posteromedial column of the medial tibial plateau, and the longitudinal direction of the internal fixation of the plate is also more obedient to the bone surface. The medial column and the posteromedial column are double-layered, providing more fixation positions to implant screws to achieve the fixation effect.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the front view of a kind of post-medial fixation plate of tibial plateau that can fix double-column provided by the utility model;

2 is a side view of the posterior medial fixation plate of the tibial plateau that can fix a double column provided by the utility model;

FIG. 3 is a top view of a posterior medial fixation plate of the tibial plateau that can fix a double column provided by the present invention.

Reference numerals and component descriptions involved in the drawings:

1. The first flat steel plate; 2. The first transverse arc-shaped steel plate; 3. The second transverse arc-shaped steel plate; 4. The first longitudinal section; 5. The second longitudinal section; 6. Threaded holes; 7. Sliding holes; 8, Kirschner pinhole.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below through specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Referring to Figures 1 to 3, a double-column tibial plateau posteromedial fixation plate is formed. The fixation plate is formed by a smooth transition of the tibial plateau articular surface fixation plate and the proximal tibial fixation plate, and the whole is a curved F-shaped structure. The tibial plateau articular surface fixation plate includes a first straight plate 1 that fits with the posteromedial articular surface of the tibial plateau and a first transverse arc-shaped plate 2 that fits with the medial articular surface of the tibial plateau. The proximal tibial plate includes a The second transverse arc-shaped steel plate 3 fitted with the medial surface of the proximal tibia and the longitudinal steel plate fitted with the longitudinal surface of the proximal tibia.

A longitudinal steel plate is vertically connected at the joint between the first flat steel plate 1 and the first transverse arc-shaped steel plate 2, and a second transverse arc-shaped steel plate 3 extends laterally on the side of the longitudinal steel plate corresponding to the position of the first transverse arc-shaped steel plate 2, and the The length of a transverse arc-shaped steel plate 2 is greater than that of the second transverse arc-shaped steel plate 3, and the projections of the first transverse arc-shaped steel plate 2 and the second transverse arc-shaped steel plate 3 on the horizontal plane are parallel to each other. Therefore, in the main view direction, the entire fixed steel plate presents an F-shaped structure.

Among them, the curvature of the first transverse arc-shaped plate 2 matches the lateral surface anatomy of the medial articular surface of the tibial plateau, and the curvature of the second transverse arc-shaped plate 3 matches the lateral surface anatomy of the proximal tibia medial surface. It can be used to fix the medial column of the tibial plateau, and the lateral position of the plate internal fixation is more obedient to the bone surface.

The part of the longitudinal steel plate between the first transverse arc-shaped steel plate 2 and the second transverse arc-shaped steel plate 3 is defined as the first longitudinal section 4, and the part between the second transverse arc-shaped steel plate 3 and its end is defined as the first longitudinal section 4. Two longitudinal sections 5 , the length of the first longitudinal section 4 is smaller than the length of the second longitudinal section 5 . Between the first longitudinal section 4 and the second longitudinal section 5, there is an arc that matches the anatomical shape of the proximal longitudinal surface of the tibia, that is, it matches the longitudinal arc of the posteromedial column of the tibial plateau, so that the entire fixation plate has an arc on the side. . At the same time, the first straight plate 1 fits the posteromedial articular surface of the tibial plateau, so the first straight plate 1 cooperates with the longitudinal plate to fix the posteromedial column of the tibial plateau.

In order to provide more screw implantation positions, a plurality of threaded holes 6 are opened on the first flat steel plate 1, the first transverse arc steel plate 2, the second transverse arc steel plate 3 and the longitudinal steel plate, and the threaded holes 6 are standard One of round screw holes, multi-axis locking holes and single-axis locking holes. In this embodiment, the tibial plateau articular surface fixing plate is provided with five threaded holes 6, of which three threaded holes 6 are distributed on the first transverse arc-shaped steel plate 2, and two threaded holes 6 are distributed on the first flat steel plate 1 on. The second transverse arc-shaped steel plate 3 is provided with 2 threaded holes 6, and the longitudinal steel plate is provided with 4 threaded holes 6, of which 3 threaded holes 6 are distributed in the second longitudinal section 5, and one threaded hole 6 is distributed in the first longitudinal section 4.

The longitudinal steel plate defines a sliding hole 7 on the second longitudinal section 5. The sliding hole 7 is arranged to facilitate the slight adjustment of the longitudinal position of the fixed steel plate, which is beneficial to the reduction of the fracture fragment. The length of the sliding hole 7 in the longitudinal direction of the longitudinal steel plate is greater than the length in the transverse direction of the longitudinal steel plate, so the screws are fixed at different positions in the longitudinal direction of the sliding hole 7, and the longitudinal position of the entire fixed steel plate can be adjusted.

The tibial plateau articular surface fixation plate is provided with a plurality of K-wire holes 8 at one edge of the junction of the proximal tibia fixed plate, and the number of K-wire holes 8 located at part 1 of the first flat plate is greater than that of the first flat plate. The number of Kirschner pinholes 8 at the part 2 of a transverse arc-shaped steel plate. The longitudinal steel plate has a Kirschner pinhole 8 at the lower end of the second longitudinal section 5, which is convenient for temporary fixation, and the position of the fixed steel plate is confirmed by perspective.

The posteromedial and medial column fractures of the tibial plateau were exposed through the posteromedial approach of the knee joint. After the fracture reduction was satisfactory, the fixation plate was placed on the posteromedial side of the tibial plateau, so that the first straight plate 1 of the fixed plate was close to the posteromedial side of the tibial plateau. The articular surface, the first transverse arc-shaped plate 2 is close to the medial articular surface of the tibial plateau, the second transverse arc-shaped plate 3 is close to the medial surface of the proximal tibia, and the first longitudinal section 4 and the second longitudinal section 5 of the longitudinal plate are the same as The longitudinal surface of the proximal end of the tibia is closely attached. First, insert screws into the sliding hole 8 on the second longitudinal section 5, so that the fixing plate is close to the bone surface. The Kirschner wire hole 8 is inserted into the Kirschner wire for temporary fixation. Fix the position of the steel plate. According to the needs during the operation, it can be fixed at different positions in the longitudinal direction of the sliding hole 7 by screws to slightly adjust the longitudinal position of the fixed steel plate. After the position of the fixed steel plate is satisfied, screw the appropriate length of screws into each threaded hole 6 for fixing. .

The utility model adopts a fixed steel plate to fix the medial column and the posteromedial column of the tibial platform at the same time, which can not only reduce the number of steel plates used, reduce the operation cost and reduce the trauma, but also avoid the cross collision of the screws of the vertical parts of the two steel plates and the fracture. possible.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A fixation plate of the tibial plateau posterior medial that can fix double columns is characterized in that: the fixed plate is formed by the tibial plateau articular surface fixation plate and the tibial proximal end fixation plate in a smooth transition, and the whole is a curved F-shaped structure, so The tibial plateau articular surface fixation plate includes a first straight plate that fits with the posterior medial articular surface of the tibial plateau and a first transverse arc-shaped plate that fits with the medial articular surface of the tibial plateau, and the proximal tibial fixing plate includes a The second transverse arc-shaped steel plate fitted with the medial side of the proximal tibia and the longitudinal steel plate fitted with the longitudinal surface of the proximal tibia, and the junction of the first flat steel plate and the first transverse arc-shaped steel plate is vertically connected with The longitudinal steel plate, the second transverse arc-shaped steel plate laterally extends from the side of the longitudinal steel plate corresponding to the position of the first transverse arc-shaped steel plate, the first flat steel plate, the first transverse arc-shaped steel plate , the second transverse arc-shaped steel plate and the longitudinal steel plate are provided with a plurality of threaded holes. 2 . The posterior medial fixation plate of the tibial plateau that can fix a double column according to claim 1 , wherein the projections of the first transverse arc-shaped plate and the second transverse arc-shaped plate on the horizontal plane are mutually exclusive. 3 . parallel. 3. A kind of post-medial fixation plate of the tibial plateau that can fix double columns according to claim 2, is characterized in that: the radian of the said first transverse arc-shaped plate is matched with the transverse surface anatomy of the inner articular surface of the tibial plateau , the arc of the second transverse arc-shaped steel plate matches the transverse surface anatomy of the medial side of the proximal end of the tibia, and the length of the first transverse arc-shaped steel plate is greater than the length of the second transverse arc-shaped steel plate. 4. The posterior medial fixation plate of the tibial plateau that can fix a double column according to claim 3, wherein the tibial plateau articular surface fixation plate is not connected with the proximal tibial plate at one side edge of the fixed plate A plurality of Kirschner pinholes are opened at the first flat steel plate portion, and the number of the Kirschner pinholes located at the first straight steel plate portion is greater than the number of the K-wire holes located at the first transverse arc-shaped steel plate portion. number. 5. A double-column tibial plateau posteromedial fixation plate according to claim 1, characterized in that: the longitudinal steel plate is located between the first transverse arc-shaped steel plate and the second transverse arc-shaped steel plate. The part between is defined as the first longitudinal segment, the part located between the second transverse arc-shaped steel plate and its end is defined as the second longitudinal segment, and there is a second longitudinal segment between the first longitudinal segment and the second longitudinal segment. The arc that matches the anatomical shape of the longitudinal surface of the proximal tibia, that is, matches the longitudinal arc of the posteromedial column of the tibial plateau. 6 . The posteromedial fixation plate of the tibial plateau capable of fixing a double column according to claim 5 , wherein the length of the first longitudinal section is smaller than the length of the second longitudinal section. 7 . 7. The posterior medial fixation plate of the tibial plateau capable of fixing double columns according to claim 5, wherein the longitudinal plate is provided with a sliding hole on the part of the second longitudinal section, and the sliding hole The length in the longitudinal direction of the longitudinal steel plate is greater than the length in the transverse direction of the longitudinal steel plate. 8 . The postero-medial fixation plate of the tibial plateau capable of fixing double columns according to claim 5 , wherein the longitudinal plate is provided with a Kirschner wire hole at the end of the second longitudinal section. 9 . 9 . The posterior medial fixation plate of the tibial plateau capable of fixing double columns according to claim 1 , wherein the threaded hole is one of a standard circular screw hole, a polyaxial locking hole and a uniaxial locking hole. 10 . kind.

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