CN215129858U

CN215129858U - Sliding bone extension plate system

Info

Publication number: CN215129858U
Application number: CN202120288686.4U
Authority: CN
Inventors: 曾宇阳; 徐威; 沈奕; 曹政; 游艺; 张舒哲; 曾纳新
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-12-14
Anticipated expiration: 2031-02-02

Abstract

The invention relates to a sliding bone extension plate system which comprises a fixing plate, a sliding plate, a threaded rod and a universal joint. The two ends of the fixing plate are respectively fixed at the near end and the far end of the long bone. The sliding plate is sleeved on the fixed plate and is fixed with the traction bone block needing to slide. The middle part of the fixed plate close to one side of the sliding plate is provided with an arc-shaped first groove, one side of the sliding plate close to the fixed plate is provided with an arc-shaped second groove, and the first groove and the second groove are encircled to form a threaded rod hole. The threaded rod is equipped with universal joint near the one end of long bone near-end, and the other end runs through the threaded rod hole and extends to long bone distal end. The inner side surface of the second groove is provided with a thread matched with the threaded rod, and the universal joint is provided with an adjusting opening. The invention has small structure, can be placed outside or in skin, has simple structure, easy operation, convenient nursing and small influence on the life of a patient; the trauma is small during traction; the moving bone block is stable and is not easy to retract; can press the broken end to promote the bone healing, can be used as an ultimate fixing mode, and avoids multiple operations.

Description

Sliding bone extension plate system

Technical Field

The invention relates to the field of devices for orthopedic surgery, in particular to a sliding bone extension plate system for treating bone defects.

Background

With the improvement of the living standard of people, the popularization of machine operation and motor vehicles, various accidents are frequently seen, and the risks of bone infection and large-section bone defect of fracture patients caused by the high-energy injury are obviously increased compared with the prior art. It has long treatment period, high cost and poor curative effect. The previous bone lengthening device, such as "a relay type bone moving device based on gear power and using method" disclosed in chinese patent 202010235833.1, has the disadvantages of complex structure, large operation wound, need of relay traction lengthening of multiple incisions, high infection risk, high difficulty of postoperative care, etc.

Disclosure of Invention

The invention aims to provide a sliding bone extension plate system which is simple in structure, small in operation wound, low in infection rate and convenient to care, aiming at the defects of complex structure, large operation wound, high infection rate, difficult nursing and the like in the prior art in the background art.

A sliding bone extension plate system comprises a fixing plate, a sliding plate, a threaded rod and a universal joint. Two ends of the fixing plate are respectively fixed at the proximal end and the distal end of the long bone. The sliding plate is sleeved on the fixed plate and is fixed with the traction bone block needing to slide. The middle part that the fixed plate is close to the sliding plate one side is equipped with curved first groove, and the one side that the sliding plate is close to the fixed plate is equipped with curved second groove, and the length in first groove is greater than the length in second groove, and first groove and second groove enclose and form the screw rod hole. The threaded rod is equipped with universal joint near the one end of long bone near-end, and the other end runs through the threaded rod hole and extends to long bone distal end. And the inner side surface of the second groove is provided with a thread matched with the threaded rod, and the universal joint is provided with an adjusting opening.

In one embodiment, the adjusting port can be externally connected with a detachable adjusting rod to adjust the threaded rod.

In one embodiment, both ends of the fixation plate are provided with fixation region screw holes, and both ends of the fixation plate are fixed to the proximal long bone end and the distal long bone end by the fixation region screw holes and fixation region screws, respectively.

In one embodiment, the sliding plate is fixed with the bone traction block to be slid through the sliding area screw hole and the sliding area screw.

The invention has the advantages and beneficial effects that:

the sliding bone extension plate system is installed in vivo (or in vitro) through an operation, two ends of a fixing plate are respectively fixed at the near end and the far end of a long bone, the sliding plate is fixed at a bone block needing to be slid and pulled, after the system is fixed, the bone is cut to separate the bone block needing to be slid and pulled from the long bone, and a threaded rod is adjusted through a detachable adjusting rod: the threaded rod is rotated, and the inner side surface of the second groove of the sliding plate is provided with the threads matched with the threaded rod, so that the sliding plate and the bone blocks which are fixed with the sliding plate and need to slide are stably and uniformly moved to the other end, the bones are prolonged, and the aims of protecting the limbs and improving the functions of the limbs are fulfilled. The invention solves the problems of high cost of related medical instruments used in the bone lengthening technology in the prior art, large wound (cutting skin during traction), complex structure, high infection rate, difficult nursing, difficult quantification of traction length, easy retraction and the like.

1. Compared with the bone extension external fixing frame in the prior art, the structure of the sliding plate extension system is smaller, the sliding plate extension system can be arranged outside the skin (external fixation) and also can be arranged under the skin (internal fixation), the structure is simple, the operation is easy, the nursing is convenient, and the influence on the life of a patient is small.

2. When the invention is used for traction (the traction refers to the process of moving bone blocks needing to be dragged in a sliding way), the skin does not need to be cut, and the wound is small.

3. The two ends of the fixing plate are fixed with the near end and the far end of the long bone through the fixing area screws in an anatomical bridging manner, so that the alignment of the long bone is ensured to be good, the fixing plate can also be used as an ultimate fixing mode, and the fixing mode does not need to be changed through a second operation after the bone is prolonged.

4. When the invention is used for traction, the moving bone block is stable and is not easy to retract, and the broken end can be pressurized through the threaded rod to promote fracture healing.

5. The invention can be customized according to the lesion part, the defect size and the long bone shape.

Drawings

Fig. 1 is a schematic view of the state of the present invention during use.

Fig. 2 is a schematic cross-sectional view of a fixed plate and a shifting plate of the present invention.

Fig. 3 is a schematic view of a partially broken structure of the fixed plate and the sliding plate of the present invention.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "disposed" on another element, it can be directly disposed or attached to the other element or intervening elements may also be present. The terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1

Referring to fig. 1 to 3, a sliding bone extension plate system includes a fixed plate 1, a sliding plate 2, a threaded rod 3, and a universal joint 4.

Specifically, both ends of the fixing plate 1 are fixed (anatomically fixed) to the proximal long bone end 51 and the distal long bone end 52, respectively. The sliding plate 2 is sleeved on the fixing plate 1, and the sliding plate 2 is fixed with the traction bone 53 to be slid. The middle part that fixed plate 1 is close to the one side of slide block 2 is equipped with curved first groove 11, and the one side that slide block 2 is close to fixed plate 1 is equipped with curved second groove 21, and the length in first groove 11 is greater than the length in second groove 21, and first groove 11 encloses with second groove 21 and closes formation screw rod hole 31 as figure 2. One end of the threaded rod 3 close to the proximal end 5 of the long bone is provided with a universal joint 4, and the other end penetrates through the threaded rod hole 31 to extend to the distal end 52 of the long bone. The inner side surface of the second groove 21 is provided with a thread matched with the threaded rod 3, and the universal joint 4 is provided with an adjusting opening.

Wherein, adjust the mouth and can externally dismantle the regulating lever and adjust threaded rod 3.

Specifically, both ends of the fixing plate 1 are provided with fixing region screw holes 61, and both ends of the fixing plate 1 are respectively fixed to the proximal long bone end 51 and the distal long bone end 52 through the fixing region screw holes 61 and the fixing region screws 6.

Specifically, the sliding plate 2 is fixed with the bone block 53 to be slid and drawn through the sliding area screw hole 71 and the sliding area screw 7.

The working principle and the working process of the invention are as follows:

for patients with tibial bone defects and bone infections, as shown in fig. 1 (reference numeral 9 in fig. 1 represents the defect site): the proximal end of the tibia (namely, the long bone) is exposed by adopting a small skin incision, skin and subcutaneous tissues are incised, a sliding bone extension plate system (the size and the shape of the sliding plate can be customized according to the data of the healthy side tibia) is arranged, and two ends of the fixing plate 1 are firmly fixed with the proximal end 51 and the distal end 52 of the long bone respectively. The sliding plate 2 is fixed with the bone block to be carried (namely, the bone block 53 to be carried) through the sliding area screw 7, after the bone is cut along the osteotomy line 8, the adjusting rod can be externally connected and disassembled through the adjusting port on the universal joint 4 on the threaded rod 3 for adjustment, so that the sliding plate 2 and the bone block 53 to be carried to the long bone far end 52 stably and uniformly, and the purpose of bone extension is achieved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but are included in the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The embodiments of the present invention are described only for the preferred embodiments of the present invention, and not for the limitation of the concept and scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall into the protection scope of the present invention, and the technical content of the present invention which is claimed is fully set forth in the claims.

Claims

1. A sliding bone extension plate system is characterized by comprising a fixing plate, a sliding plate, a threaded rod and a universal joint;

the both ends of fixed plate are fixed in long bone near-end and long bone distal end respectively, the board cover that slides is located on the fixed plate, and it is fixed with the bone piece that pulls that need slide to slide the board, the middle part that the fixed plate is close to the board one side that slides is equipped with curved first groove, the one side that the board that slides is close to the fixed plate is equipped with curved second groove, the length in first groove is greater than the length in second groove, first groove and second groove enclose to form the screw rod hole, the one end that the threaded rod is close to the long bone near-end is equipped with universal joint, the other end runs through the screw rod hole and extends to long bone distal end, the medial surface in second groove be equipped with threaded rod assorted screw thread, the last regulation mouth that is equipped with of universal joint.

2. The sliding bone extension plate system of claim 1, wherein the adjustment port is adapted to receive a removable adjustment rod for adjusting the threaded rod.

3. The sliding bone extension plate system of claim 1, wherein both ends of the fixation plate are provided with fixation area screw holes, and both ends of the fixation plate are fixed to the proximal long bone end and the distal long bone end by fixation area screw holes and fixation area screws, respectively.

4. The sliding bone extension plate system of claim 1, wherein the sliding plate is fixed to the bone block to be slid by a sliding screw hole and a sliding screw.