Bone screw and bone lamella structure

A bone screw and bone plate technology, applied in the direction of outer plate, internal bone synthesis, internal fixator, etc., can solve the problems of poor fixation effect, subsidence of femoral head, screw passing out of femoral head, etc., so as to reduce subsidence of femoral head and facilitate The effect of installation

Inactive Publication Date: 2018-11-20
THE FIRST AFFILIATED HOSPITAL OF ARMY MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned various screw configurations, when used on patients with osteoporosis, often cause excessive subsidence of the femoral head because the femoral head of the patient is too loose; or, a lag screw (Lag sc

Method used

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  • Bone screw and bone lamella structure
  • Bone screw and bone lamella structure
  • Bone screw and bone lamella structure

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] The first embodiment is a combination structure of a dynamic bone screw and a bone plate for reduction of femoral head fractures, which includes a bone plate body 1, a slotted bone nail 2, two resistance blades 3, and a fixing screw 4. ,

[0029] Such as figure 1 , 2, 5, 6, the bone plate body 1 has a joint 12, the inner side of which is a concave arc surface, so that when it is attached to the femur, the contact area between the two can be increased; four perforations 120 penetrate the joint The inner and outer sides of 12 are separated by an appropriate distance; the extension 14 is a tube of appropriate length, and the outer edge of the outer end is connected to the upper end of the joint 12, and the longitudinal direction of the two is sandwiched between 120° and 140° The included angle makes the bone plate body 1 bend; the inner diameter of the shaft hole 140 in the extension part 14 adjacent to the outer end of the joint 12 is larger than the inner end of the inner e...

Example Embodiment

[0039] Example two, such as image 3 As shown in 4,9, the resistance blade 3 shown can be eliminated, leaving only the thread structure, or the resistance blade 3 does not protrude from the shaft hole 140.

Example Embodiment

[0040] Example three, such as Picture 10 As shown, a screw structure can be added to the outside of the resistance blade 3, as long as the contact area between the dynamic bone screw and the bone plate structure and the femoral head can be increased and the fixation effect can be enhanced to achieve the purpose of the present invention. Category.

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PUM

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Abstract

The invention relates to the field of medical orthopedics, and particularly relates to a bone screw and bone lamella structure. The structure comprises a bone lamella body, wherein the bone lamella body comprises a combining part and an extending part; the outer side end of the extending part is connected to the upper end of the combining part, and a preset angle is formed between the combining part and the extending part, so that the whole body is bent; bone tapping screw threads are formed in the outer edge of the inner side end of a grooving bone nail, and the outer side end has preset length, so that the outer side end can be combined with the extending part in a reciprocating moving manner; at least one first long groove is formed in the outer edge and axially extends in preset length; the inner side end of a fixing screw is screwed to the outer side end of the grooving bone nail, and the outer side end of the fixing screw is limited through a stopping part and is kept at the outer side end of the extending part. The bone screw and bone lamella structure has the advantages of being easy to mount, and particularly reducing the sinking of caput femoris; in addition, the effect of improving the stability of a combining part is obvious while the bone screw and bone lamella structure is applicable to fractured innominate bone subjected to osteoporosis.

Description

technical field [0001] The invention relates to the field of medical orthopedics, in particular to a bone screw and bone plate structure. Background technique [0002] In orthopedics, proximal femoral fracture is one of the common diseases, which often occurs in the elderly or people with osteoporosis. Among them, fractures of the femoral neck or greater trochanter at the hip joint due to osteoporosis usually use Dynamic Hip Screws or Compression Hip Screws to reduce and repair the fracture site. fixed. The above-mentioned various screw configurations, when used on patients with osteoporosis, often cause excessive subsidence of the femoral head because the femoral head of the patient is too loose; or, a lag screw (Lag screw) locked into the femoral head Screw), often because the area of ​​contact with the bone is too small, the fixation effect is not good, and even lead to complications such as the screw passing through the femoral head. Contents of the invention [000...

Claims

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Application Information

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IPC IPC(8): A61B17/80A61B17/74
CPCA61B17/8052A61B17/74
Inventor 谢美明唐康来杨明宇张洪鑫杨志金
Owner THE FIRST AFFILIATED HOSPITAL OF ARMY MEDICAL UNIV
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