CN204708964U - Twin columns fixedly locked blade plate in outside after a kind of distal humerus - Google Patents

Abstract

The utility model relates to a bone-synthetic plate, in particular to a posterolateral double-column fixed-locking bone-synthesized plate at the distal end of the humerus. A posterolateral double-column fixed and locked bone plate for the distal humerus, including a plate head, a steel plate rear main body, a plate front flank, and a plate posterior flank. Fitting is mainly used to treat fractures of the lower segment of the humerus and intercondylar fractures of the distal humerus. The contour of the overall fitting plate is anatomically fitted to the humeral shaft, the distal end of the humerus, and the lateral border. Previously, multiple plates or joint reconstruction plates were required. , now only need this one steel plate to do it, and the fixing effect is very good. At the same time, the anatomically fitted and curved flanks are smooth and less likely to irritate the radial nerve, which is especially applicable when surgeons choose the currently recommended lateral humeral approach.

Description

A posterolateral two-column fixed locking bone plate for the distal end of the humerus

technical field

The invention relates to a bone plate, in particular to a posterolateral double-column fixed locking bone plate of the distal humerus.

Background technique

The human humeral shaft is in the shape of a cylinder as a whole, and the distal end is divided into the medial and lateral branches of the humerus, which are flat and wide in the form of a fan. There is an anteverted angle with the axis of the humerus, and the condyle of the humerus is thin, so supracondylar fractures of the humerus are prone to occur. , Fracture of the middle and lower part of the humerus, fracture of the intercondyle of the humerus, intercondylar fracture of the humerus complicated by supracondylar or fracture of the middle and lower part of the humerus. For many years, many hospitals have used Y-shaped plates to treat humeral condyle fractures. This steel plate, which resembles the English "Y", once played a historical role and treated many such patients. However, with the passage of time and technological progress, it was found through postoperative follow-up that the Y-shaped steel plate had the following problems: 1) Surgical separation Exposure to the triceps brachii has a large area, large trauma, and loss of blood supply to the fracture block, which affects fracture healing; 2) The steel plate needs to be shaped, which prolongs the operation time; 3) The broken plate rate is high, and the Y-shaped steel plate is easy for the surgeon to shape, and manufacturers often choose it Made of materials with low strength and low hardness, it is easy to break; at the same time, the biomechanical fixation is poor, the fracture does not unite, and long-term stress causes fatigue fracture. Others have designed the medial and lateral locking plate of the distal humerus for clinical application, but there are problems such as exposure of the ulnar nerve, excessive stripping of soft tissue on the fracture block, and delayed fracture union. In addition, the combination of these two plates is mainly used for the treatment of humeral condyle fractures, which is difficult to treat humeral condyle fractures, humeral shaft fractures, and lower humeral segment fractures. At present, clinically, it has become a consensus that double plate fixation is required for fractures of the lower humerus. One anatomical plate combined with one reconstruction plate or two reconstruction plates are usually used for fixation. This method takes up a large volume of plates and is difficult to fix, and the soft tissue on the fracture fragment is easily stripped Too many, affecting fracture healing; at the same time, the reconstruction plate needs to be reshaped by the surgeon, resulting in prolonged operation time. In addition, when surgeons choose the currently recommended lateral approach to the humerus, it is better to expose and protect the radial nerve (the radial nerve wraps around the posterolateral side of the humeral shaft, and is 6-16 cm away from the distal tip of the humeral head, with an average of about 12 cm). The existing internal fixation materials cannot fully meet the current innovation needs.

Contents of the invention

The purpose of the present invention is: aiming at the deficiencies of the prior art, to provide an effectively fixed posterolateral double-column fixed and locked bone plate of the distal end of the humerus that conforms to the anatomical characteristics of the humerus.

For realizing the purpose of the present invention, adopt following technical scheme to realize:

A posterolateral double-column fixed locking bone plate for the distal end of the humerus, comprising a plate head, a steel plate rear main body, a steel plate anterior wing, and a steel plate posterior wing, all of which are connected to the main body of the humerus On and on the same side of the main body of the humerus, there are 3-4 locking holes and 4-6 locking and pressurizing joint holes on the rear main body of the steel plate, and 1 to 2 locking holes on the front flank of the humerus , the rear flank of the humerus is provided with 4 to 6 large locking holes, the length of the main body of the rear part of the steel plate is 80 to 150 mm, the width of the main body of the steel plate is 11.5 to 12.5 mm, and the front flank of the steel plate The length is 10~11mm, and the width is 6~7mm. The length of the main body of the steel plate head is 55~65mm, and the width is 15~16mm.

Preferably, the diameter of the locking hole of the steel plate head and the front flank is 2.7 mm.

Preferably, the diameter of the first large locking hole is 3.5-4.5 mm, and the diameter of the other holes is 3.5 mm.

As a preference, the screw inserted into the first large locking hole of the rear flank is aligned with the medial epicondyle of the humerus and the longitudinal axis of the rear main body of the steel plate deviates to the distal end, forming an included angle δ of 40°~50°, The forward inclination angle γ in the direction perpendicular to the longitudinal axis of the main body at the rear of the steel plate is 20°~35°

Preferably, the included angle α between the central axis of the rear main body of the humerus plate and the central axis of the head of the humerus plate is 15°.

Preferably, the angle β formed between the rear flank of the steel plate and the axis of the humerus main body is 55°-65°, the distance from the top of the humerus plate head is 50-60 mm, and the width of the flank is 5.5-6.5 mm. The length is 50~70mm

Preferably, the steel plate rear main body and the steel plate rear flanks are further provided with a Gram-style pinhole.

Preferably, the rear main body of the steel plate, the head of the steel plate, the anterior wing of the steel plate, and the posterior wing of the steel plate are in an arc shape that coincides with the arcs of the humeral shaft, the distal end of the humerus, and the two lateral margins.

Preferably, the bone plate is made of steel or titanium alloy plate.

Compared with the prior art, the beneficial effect of the present invention is that the profile of the steel plate fits the anatomical shape of the humeral shaft, the distal end of the humerus and the lateral border, and is mainly used for treating fractures of the lower segment of the humerus and intercondylar fractures of the distal humerus. The main purpose is to increase the posterior flank of the humerus, make the flank larger, use a large locking hole, and fix it from multiple angles on the side. One of the special screws is selected to fix the ulnar column of the distal humerus, and the other screws are selectively fixed to the humeral shaft. It can be fixed firmly, and the contour of the overall fitting plate fits anatomically with the humeral shaft, distal end of the humerus, and lateral border. Previously, multiple plates or joint reconstruction plates were required, but now only one plate is needed, and the fixation The effect is very good. At the same time, the anatomically fitted and curved flanks are smooth and less likely to irritate the radial nerve, which is especially applicable when surgeons choose the currently recommended lateral humeral approach.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic structural view of the rear trunk body 2 of the steel plate of the present invention;

Fig. 3 is a schematic structural view of the side of the steel plate rear wing 4 of the present invention;

Fig. 4 is a structural schematic diagram of a cross-section of the steel plate rear wing 4 of the present invention.

Detailed ways

The specific embodiment of the present invention will be described in detail below according to accompanying drawings 1-4.

Example 1

A posterolateral double-column fixed locking bone plate for the distal humerus, comprising a steel plate head 1, a steel plate rear main body 2, a steel plate front wing 3 and a steel plate rear wing 4, a steel plate head 1, a steel plate front wing 3 and a steel plate rear wing 4 are all connected to the rear main body 2 of the steel plate and are on the same side of the rear main body 2 of the steel plate. The front and rear main bodies 1 and 2 of the steel plate are provided with 5 locking holes and 6 locking and combining holes 8, Two locking holes 5 are provided on the front side of the steel plate 3, four large locking holes 6 are provided on the rear side of the steel plate 4, the length of the main body 2 of the rear part of the steel plate is 100 mm, and the main body 2 The width is 12mm, the length of the front flank 3 of the steel plate is 10.5mm, and the width is 6.5mm, the length of the steel plate head 1 is 60 mm, and the width is 15.5mm, and the hole diameter of the locking hole 5 is 2.7mm, the number of large locking holes 6 on the rear flank 3 of the steel plate is 4, the diameter of the first large locking hole 6 is 4.5 mm, and the diameter of the other 3 holes is 3.5 mm, the main body of the steel plate rear 2 The included angle α between the central axis and the central axis of the steel plate head 1 is 15°, and the included angle β formed between the steel plate rear flank 4 and the axis of the steel plate rear main body 2 is 60°. The width of the steel plate rear flank 4 is 6mm, and the length is 60mm. There is a gram pinhole 7, the arc shape of the rear main body 2 of the steel plate, the head 1 of the steel plate, the front wing 3 of the steel plate and the rear wing 4 of the steel plate coincides with the curvature of the humerus shaft, the distal end of the humerus and the arcs of the two outer edges. The bone plate is made of steel or titanium alloy plate. The flanks of the humerus plate and around the flanks, the steel plate head 1 mostly use locking holes 5, and the two ends at the rear side of the steel plate rear trunk body 2 mostly use locking and pressurizing joint holes 8.

The distribution of the large locking holes 6 on the rear flanks 4 of the steel plate is mutually angled with the main bone body 1 because the rear flanks 4 of the steel plate are mutually angled, so the screws that are driven into the large locking holes 6 are also fixed in multiple angles, wherein the first The largest screw fixes the ulnar column of the distal humerus, and the rear three are used for selective fixation of the humeral shaft. The rear main body 2 of the steel plate, the head 1 of the steel plate, the front flank 3 of the steel plate, and the rear flank 4 of the steel plate are anatomically fitted in an arc shape that matches the curvature of the humerus shaft, the distal end of the humerus, and the two lateral margins, so as to ensure maximum The role of the steel plate, the two rows of locking holes 5 with a diameter of 2.7 mm on the front body of the steel plate 2 selectively fix the capitulum of the humerus and the lateral column of the humerus, and the two locking holes 5 with a diameter of 2.7 mm on the front flank of the steel plate 3 The screw on the upper part of the humerus fixes the intercondyle of the humerus, which can be combined with the main body of the plate to form the medial and lateral columns of the distal humerus to be fixed at the same time. The locking hole 5 on the front flank 3 of the steel plate can pass through the transverse axis of the humeral trochlea in parallel up and down through the screw, which is the effect of the two screws. The curvature of the rear flank 4 of the steel plate is approximately a circular arc with a diameter of 20mm. The distance between the first large locking hole 6 and the small head of the humerus is 60mm. 30°, aiming at the medial epicondyle of the humerus and the distal end of the longitudinal axis of the rear main body of the steel plate, the angle δ is 45°, this must be done in order to reflect its effect, and the main purpose is to align the medial epicondyle of the humerus , so there are very high requirements for the radian, length and width of the rear flank 4 of the steel plate. When the surgeon chooses the lateral approach of the humerus, the radial nerve can be effectively exposed and protected, and this plate should be used for firm fixation.

Example 2

A posterolateral double-column fixed locking bone plate for the distal humerus, comprising a steel plate head 1, a steel plate rear main body 2, a steel plate front wing 3 and a steel plate rear wing 4, a steel plate head 1, a steel plate front wing 3 and a steel plate rear wing 4 are all connected to the main body 2 at the rear of the steel plate and are on the same side of the main body 2 at the rear of the steel plate. The front and rear main bodies 1 and 2 of the steel plate are provided with 4 locking pressurized joint holes 8 and 4 to lock Holes 5, two locking holes 5 are provided on the front wing 3 of the steel plate, five large locking holes 6 are provided on the rear wing 4 of the steel plate, the length of the main body 2 at the rear of the steel plate is 140mm, and the rear of the steel plate The width of the trunk body 2 is 12mm, the length of the steel plate front flank 3 is 11mm, and the width is 7mm, the length of the steel plate head 1 is 65mm, and the width is 16mm, and the hole diameter of the locking hole 5 is 2.7 mm. mm, the number of large locking holes 6 on the rear flank 4 of the steel plate is 5, the hole diameter of the first large locking hole 6 is 4.5 mm, and the diameter of the remaining 4 locking holes is 3.5 mm, the main body of the steel plate rear part 2 The included angle α between the central axis and the central axis of the steel plate head 1 is 15°, and the included angle β formed between the steel plate rear flank 4 and the axis of the steel plate rear main body 2 is 55°. The width of the steel plate rear flank 4 is 6mm, and the length is 70mm. There is a gram pinhole 7, the arc shape of the rear main body 2 of the steel plate, the head 1 of the steel plate, the front wing 3 of the steel plate and the rear wing 4 of the steel plate coincides with the curvature of the humerus shaft, the distal end of the humerus and the arcs of the two outer edges. The bone plate is made of steel or titanium alloy plate. The flanks of the humerus plate and around the flanks, the steel plate head 1 mostly use locking holes 5, and the two ends at the rear side of the steel plate rear trunk body 2 mostly use locking and pressurizing joint holes 8.

The large locking holes 6 on the rear flank 4 of the steel plate are distributed. Since the rear flank 4 of the steel plate is at an angle to the main body of the bone 1, the screws formed into the locking holes are also fixed in multiple angles, and the first one is also the largest. Screws are used to fix the ulnar column of the distal humerus, and the rear 4 screws are used to selectively fix the humeral shaft according to the fracture line. The rear main body 2 of the steel plate, the head 1 of the steel plate, the front flank 3 of the steel plate, and the rear flank 4 of the steel plate are anatomically fitted in an arc shape that matches the curvature of the humerus shaft, the distal end of the humerus, and the two lateral margins, so as to ensure maximum The role of the steel plate, the two rows of locking holes 5 with a diameter of 2.7 mm on the front body of the steel plate 2 selectively fix the capitulum of the humerus and the lateral column of the humerus, and the two locking holes 5 with a diameter of 2.7 mm on the front flank of the steel plate 3 The screw on the upper part of the humerus fixes the intercondyle of the humerus, which can be combined with the main body of the plate to form the medial and lateral columns of the distal humerus to be fixed at the same time. The locking hole 5 on the front flank 3 of the steel plate can pass through the transverse axis of the humeral trochlea in parallel up and down through the screw, which is the effect of the two screws. The curvature of the rear flank 4 of the steel plate is approximately a circular arc with a diameter of 20 mm, the first large locking hole 6 is 60 mm away from the humerus head, and the angle between the direction of the screw hole and the vertical direction of the longitudinal axis of the rear main body of the steel plate is γ35°. , the angle δ between the medial epicondyle of the humerus and the longitudinal axis of the rear main body of the steel plate is 45°. It must be driven in this way to reflect its effect, and the main purpose is to align the medial epicondyle of the humerus, so There are very high requirements on the radian, length and width of the rear flank 4 of the steel plate. When the surgeon chooses the lateral approach of the humerus, the radial nerve can be effectively exposed and protected, and this plate should be used for firm fixation.

Claims (9)

1. A distal humerus posterolateral two-column fixed locking bone plate, characterized in that it comprises a steel plate head, a steel plate rear body, a steel plate front wing and a steel plate rear wing, a steel plate head, a steel plate front wing and a steel plate rear wing They are all connected to the main body of the humerus and are on the same side of the main body of the humerus. There are 3-4 locking holes and 4-6 locking holes and 4-6 locking holes on the main body of the rear part of the steel plate. 1-2 locking holes, 4-6 large locking holes are provided on the posterior flank of the humerus, the length of the main body of the rear part of the steel plate is 80-150 mm, the width of the main body of the steel plate is 11.5-12.5 mm, The length of the front flank of the steel plate is 10-11 mm, and the width is 6-7 mm. The length of the main body of the steel plate head is 55-65 mm, and the width is 15-16 mm. 2 . The posterolateral double-column fixed locking bone plate of the distal humerus according to claim 1 , wherein the diameter of the locking hole of the head of the plate and the front flank is 2.7 mm. 3 . 3. A kind of posterolateral distal humerus double-column fixed locking bone plate according to claim 1, It is characterized in that the diameter of the first large locking hole on the posterior flank of the humerus is 3.5-4.5 mm, and the diameter of the other large locking holes is 3.5 mm. 4. The posterolateral two-column fixed locking bone plate of the distal end of the humerus according to claim 3, wherein the screw inserted into the first large locking hole of the rear flank is aligned with the medial epicondyle of the humerus The angle δ with the longitudinal axis of the rear main body of the steel plate is 40°~50°, and the forward inclination angle γ with the longitudinal axis of the rear main body of the steel plate is 20°~35°. 5. A kind of distal humerus posterolateral double-column fixed locking bone plate according to claim 1, characterized in that, between the central axis of the main body at the rear of the humerus plate and the central axis of the head of the humerus plate The included angle α is 15°. 6. The posterolateral two-column fixed locking bone plate of the distal humerus according to claim 1, wherein the angle β formed between the rear flank of the plate and the axis of the humerus main body is 55°~65° °, the distance from the top of the head of the humerus plate is 50-60 mm, the width of the flanks is 5.5-6.5 mm, and the length is 50-70 mm. 7. The posterolateral double-column fixed locking bone plate of the distal humerus according to claim 1, characterized in that, the rear trunk body of the steel plate and the rear flank of the steel plate are also provided with pinholes . 8. A kind of distal humerus posterolateral double-column fixed locking bone plate according to claim 1, characterized in that, the rear main body of the steel plate, the head of the steel plate, the front wing of the steel plate and the rear wing of the steel plate are in contact with the humerus The arc shape coincides with the curvature of the shaft, the distal end of the humerus, and the lateral border. 9 . The posterolateral two-column fixed locking bone plate of the distal humerus according to any one of claims 1 to 8 , wherein the material of the bone plate is steel or a titanium alloy plate.