An adjustable combined bone nail plate

Abstract

The invention discloses an adjustable combined type bone peg plate. The adjustable combined type bone peg plate is characterized by comprising two bone plates, two adjusting rods, two press plates and two first screws, wherein two first adjusting holes are respectively formed in opposite surfaces of the two bone plates; annular grooves which are distributed at equal intervals are formed in the outer side walls of the two end parts of each of the two adjusting rods; two press plate clamp grooves are formed in the front surfaces of the two bone plates respectively and each press plate clamp groove is communicated with the two corresponding first adjusting holes; one end parts of the two adjusting rods are inserted into the two first adjusting holes of one bone plate respectively, and the other end parts of the two adjusting rods are inserted into the two first adjusting holes of the other bone plate respectively; two arc-shaped grooves are formed in the inner surface of each of the two press plates and matched with the end parts of the adjusting rods in shape, and arc-shaped clamp bosses inserted into the annular grooves are arranged on the inner walls of the arc-shaped grooves. With the adoption of structural design different from a conventional adjusting mode, the problems of loosening and poor reliability can be solved.

Description

technical field [0001] The invention belongs to an adjustable combined bone nail plate. Background technique [0002] When treating orthopedic diseases such as fractures, it is necessary to use a combination of bone nails and bone plates to fix around the fracture. [0003] According to the bone type characteristics of different patients, it is necessary to adjust the spacing or angle of the bone nails on the bone plate to achieve the best working state of the bone nails and the bone plate. However, the positions and angles of the bone screw mounting holes on the bone plate in the existing market are not adjustable. [0004] In addition, an adjustable bone plate has been disclosed (publication number CN 101056590B), which can realize the adjustment of the length of the bone plate. But still there are following deficiencies and analyze as follows: [0005] First, since the two ends of the connecting rod are respectively inserted into the holes of the two longitudinal plate...

AI Technical Summary

Problems solved by technology

[0005] First, since the two ends of the connecting rod are respectively inserted into the holes of the two longitudinal plates, if the connecting rod is threadedly matched with the holes, when the connecting rod rotates due to the movement of the patient, the connecting rod will Rotation with the threaded hole of the longitudinal plate causes longitudinal displacement, the shape and size of the bone plate changes, and there is a simultaneous deviation of the bone screws on the two longitudinal plates, resulting in a risk of loosening;

[0006] Second, because the two ends of the connecting rod are respectively inserted into the cavities of the two longitudinal plates, if the slit opening is reduced by the large top fixing screw and the connecting rod is clamped by the cavity, the connecting rod It is in contact with the smooth surface of the cavity, and the clamping force is generated by the narrowing of the slit opening. The friction force between the connecting rod and the cavity is very small, and the connecting rod is easy to slide in the cavity. The bone plate Dimensions change, there is a simultaneous deviation of the bone screws on the two longitudinal plates, and there is a risk of loosening;

[0007] Third, when the bone screw is installed in the bone screw hole on the bone plate, the direction of the bone screw cannot be adjusted.

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