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Combined splint internal fixation device for femoral intertrochanteric fracture and auxiliary aiming apparatus

A technology of femoral tuberosity and fixation device, applied in the direction of internal fixator, fixator, internal bone synthesis, etc., can solve the problems of large bone damage, prolonged recovery time, and insufficient fixation, and achieves strong anti-rotation ability and design The effect of simple structure and simplified reset requirements

Pending Publication Date: 2018-07-10
魏奇峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a unilateral extramedullary internal fixation system, the LCP system has the following disadvantages: there is a large stress concentration at the femoral neck, especially in the middle and lower parts of the femoral neck, and the tensile stress on the outer side of the femoral neck and the compressive stress on the inner side are high. There is a sudden increase in stress when it is close to the surface. The unilateral extramedullary internal fixation system has little effect on reducing the medial compressive stress. The extramedullary fixation method of femoral intertrochanteric fractures has a greater shear force than intramedullary fixation. LCP system Lack of good anti-shear measures; the lack of structural stability of the LCP system is compensated by using more locking screws, which causes greater damage to the bone and affects the blood supply of the trochanter, prolonging the recovery time
Elderly patients are often accompanied by osteoporosis, and insufficient fixation has a greater impact on the success rate of surgery

Method used

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  • Combined splint internal fixation device for femoral intertrochanteric fracture and auxiliary aiming apparatus
  • Combined splint internal fixation device for femoral intertrochanteric fracture and auxiliary aiming apparatus
  • Combined splint internal fixation device for femoral intertrochanteric fracture and auxiliary aiming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: as attached figure 1 As shown, a combined splint internal fixation device for intertrochanteric fractures, including a lateral bone plate 1, a medial talar bone plate 7, a main locking screw 3, a support screw 5, a greater trochanter screw 4, and a distal fixation screw 6. Bone plate 1 is below the greater trochanter 8-1 of the femur and is in close contact with the lateral cortex of the proximal end of the femur 8-2. A set of distal fixation screw holes and a set of inclined main locking holes and support screw holes are distributed on the outer bone plate 1 , the main locking screw 3, the supporting screw 5 and the distal fixing screw 6 are threadedly connected to the corresponding screw holes on the outer bone plate, the greater trochanter screw 4 passes through the greater trochanter 8-1 of the femur, and the inner The calcar bone plate 7 is below the femoral head 8-3 and is in close contact with the medial cortex of the proximal end of the femur 8-2. ...

Embodiment 2

[0015] Embodiment 2: see attached figure 2 , compared with Example 1, there are more trochanter reconstruction locking hook plates 2, a set of screw holes are provided on the greater trochanter reconstruction locking hook plate 2, and the greater trochanter reconstruction locking hook plate 2 covers the greater trochanter 8-1 , the upper end of the lateral bone plate 1 is provided with a groove 1-2, the lower end of the greater trochanter reconstruction locking hook plate 2 is embedded in the groove 1-2 of the lateral bone plate 1, the rear end of the main locking screw 3 is connected to the lateral bone plate 1 is threadedly connected with the greater trochanter reconstruction locking hook plate 2, and the rear end of the greater trochanter screw 4 is threaded with the greater trochanter reconstruction locking hook plate 2. The greater trochanter reconstruction locking hook plate 2 is an optional component, and whether to use it is decided according to the actual fracture co...

Embodiment 3

[0020] See attached Figure 4 , an auxiliary aiming instrument, comprising an aiming arm 9-1, a lateral bone plate clamping claw 9-3, a medial talar bone plate clamping claw 9-4, a connecting arm 9-2, a lateral bone plate top wire 9-5 and The top wire of the medial calcar bone plate, the lateral bone plate clamping claw 9-3 is fixedly connected with the aiming arm 9-1, and one end of the connecting arm 9-2 is fixed with the medial calcar bone plate clamping claw 9-4 connection, the other end of the connecting arm 9-2 is fixedly connected to the aiming arm 9-1 through a bolt 9-6, and the position of the outer bone plate clamping claw 9-3 corresponds to the position of the medial bone plate clamping claw 9-4 , the outer bone plate top wire 9-5 is threadedly connected with the aiming arm 9-1, and the medial bone plate top wire is threadedly connected with the connecting arm 9-2.

[0021] The clamping claw 9-3 of the lateral bone plate and the clamping claw 9-4 of the medial calc...

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Abstract

The invention relates to a combined splint internal fixation device for a femoral intertrochanteric fracture and solves the problem that an internal fixation device in the prior art cannot provide strong and biomechanical fixation for the proximal end of femurs. The device is mainly characterized in that an inside distance bone plate is added, a clamping structure that the inside distance bone plate and an outside bone plate are respectively arranged on the inner side and outer side of the femur and clamp the proximal end of the femur is adopted, and the inside distance bone plate is fixed after the external distance bone plate is implanted with screws. Correspondingly, the invention also designs auxiliary aiming apparatus for proper matching use. The auxiliary aiming apparatus is providedwith two clamping claws which can be used for fixing and clamping the inside distance bone plate and the outside bone plate respectively, and screw holes of the inside distance bone plate and the outside bone plate are always kept in concentric positions. The device has the beneficial effect that absolutely stable inside fixation of the inner side and the outer side of the proximal end of the femur can be provided simultaneously, and shear resistance and rotation resistance are high. Besides, the device is simple in design structure and has certain universality with some parts of the existinginternal fixation system.

Description

technical field [0001] The invention belongs to the field of orthopedic medical devices, in particular to a combined splint internal fixation device for femoral intertrochanteric fractures and an auxiliary aiming device. Background technique [0002] Intertrochanteric fracture is one of the most common hip fractures in clinical practice, and it occurs more frequently in the elderly. According to data, its incidence rate accounts for 3-4% of all fractures. At present, there is no unified standard for the treatment of intertrochanteric fractures. External fixation brackets, artificial femoral head replacement and internal fixation systems have developed side by side. In recent years, with the continuous development and improvement of sliding compression internal fixation systems, because of its The dual function of sliding and sliding has become the mainstream of surgical treatment of intertrochanteric fractures. The LCP system (Locking Compresion Plate System) is an internal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/80A61B17/86A61B17/76
CPCA61B17/746A61B17/8057A61B17/86
Inventor 魏奇峰
Owner 魏奇峰
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