阅读说明：本技术 一种滑动可调式椎体前路固定板 (Sliding adjustable anterior vertebral fixing plate ) 是由 郭卫 于 2019-10-30 设计创作，主要内容包括：本发明涉及一种滑动可调式椎体前路固定板,包括：上滑板,呈“T”字型,上滑板的横片上开设有上滑板锁定钉孔,上滑板的纵片两侧下沿分别形成有第一滑槽,上滑板的纵片两侧上沿分别形成有第一滑轨；下固定板,呈“凹”字型,下固定板的横片上开设有下固定板锁定钉孔,下固定板的两纵片内侧上沿分别形成有第二滑槽,下固定板的两纵片内侧下沿分别形成有第二滑轨；上滑板的纵片插设在下固定板的凹口内,且上滑板的第一滑槽与下固定板的第二滑轨相配合,上滑板的第一滑轨与下固定板的第二滑槽相配合,以使上滑板能够相对于下固定板沿纵向移动。本发明的上滑板和下固定板采用带有双侧侧方滑槽-滑轨的滑动结构,不仅滑动方式稳定可靠,而且可以有效提供抗扭转强度。(The invention relates to a sliding adjustable anterior vertebral fixing plate, which comprises: the upper sliding plate is T-shaped, an upper sliding plate locking nail hole is formed in a cross piece of the upper sliding plate, first sliding grooves are formed in the lower edges of two sides of a longitudinal piece of the upper sliding plate respectively, and first sliding rails are formed in the upper edges of two sides of the longitudinal piece of the upper sliding plate respectively; the lower fixing plate is concave, the transverse sheet of the lower fixing plate is provided with a lower fixing plate locking nail hole, the upper edges of the inner sides of the two longitudinal sheets of the lower fixing plate are respectively provided with a second sliding chute, and the lower edges of the inner sides of the two longitudinal sheets of the lower fixing plate are respectively provided with a second sliding rail; the longitudinal piece of the upper sliding plate is inserted into the notch of the lower fixing plate, the first sliding groove of the upper sliding plate is matched with the second sliding groove of the lower fixing plate, and the first sliding groove of the upper sliding plate is matched with the second sliding groove of the lower fixing plate, so that the upper sliding plate can move longitudinally relative to the lower fixing plate. The upper sliding plate and the lower fixing plate adopt sliding structures with sliding grooves and sliding rails on two sides, so that the sliding mode is stable and reliable, and the anti-torsion strength can be effectively improved.)

1. A sliding adjustable anterior vertebral fixation plate comprising:

the upper sliding plate (1) is T-shaped, an upper sliding plate locking nail hole (3) is formed in a cross piece of the upper sliding plate (1), first sliding grooves (5) are formed in the lower edges of two sides of a longitudinal piece of the upper sliding plate (1) respectively, and first sliding rails are formed in the upper edges of two sides of the longitudinal piece of the upper sliding plate (1) respectively;

the lower fixing plate (2) is concave, a lower fixing plate locking nail hole (4) is formed in a transverse sheet of the lower fixing plate (2), second sliding grooves (6) are formed in the upper edges of the inner sides of two longitudinal sheets of the lower fixing plate (2) respectively, and second sliding rails are formed in the lower edges of the inner sides of the two longitudinal sheets of the lower fixing plate (2) respectively;

the longitudinal piece of the upper sliding plate (1) is inserted into the notch of the lower fixing plate (2), the first sliding groove (5) of the upper sliding plate (1) is matched with the second sliding rail of the lower fixing plate (2), and the first sliding rail of the upper sliding plate (1) is matched with the second sliding groove (6) of the lower fixing plate (2) so that the upper sliding plate (1) can move longitudinally relative to the lower fixing plate (2).

2. The sliding adjustable anterior vertebral fixation plate of claim 1, wherein the upper sliding plate (1) and the lower fixation plate (2) are both made of titanium plates with a thickness of 2.0-5.0 mm.

3. The sliding adjustable anterior vertebral fixation plate according to claim 1, wherein the cross section of the second sliding groove (6) is designed as a flat bottom isosceles trapezoid when the fixation plate is used for lumbar vertebra fixation.

4. The sliding adjustable anterior vertebral fixation plate according to claim 1, wherein the cross section of the second sliding groove (6) is designed as a convex-base isosceles trapezoid when the fixation plate is used for fixation of thoracic vertebrae.

Technical Field

The invention relates to a centrum anterior fixing plate, in particular to a sliding adjustable centrum anterior fixing plate capable of realizing free adjustment of the length of the fixing plate.

Background

According to the "three-column theory," the stability of the spine is provided by the anterior, medial and posterior columns together. When the vertebral body is removed, the anterior longitudinal ligament is removed or the intervertebral disc is removed, the stability of the anterior column of the vertebral body is seriously lost, and the vertebral pedicle fixation from the posterior of the vertebral column alone cannot meet the structural strength, so the anterior titanium plate is a necessary mode for maintaining the stability of the anterior column of the vertebral column.

At present, the existing front-way fixed titanium plate has the defects of single thin connection mode, poor torsional strength, small adjustable length, complex connection mode and the like.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a sliding adjustable anterior vertebral fixing plate with a bilateral lateral sliding groove-sliding rail structure, so as to achieve free adjustment of the length of the fixing plate.

In order to achieve the purpose, the invention adopts the following technical scheme: a slidingly adjustable anterior vertebral fixation plate comprising: the upper sliding plate is T-shaped, an upper sliding plate locking nail hole is formed in a cross piece of the upper sliding plate, first sliding grooves are formed in the lower edges of two sides of a longitudinal piece of the upper sliding plate respectively, and first sliding rails are formed in the upper edges of two sides of the longitudinal piece of the upper sliding plate respectively; the lower fixing plate is concave, a lower fixing plate locking nail hole is formed in the transverse piece of the lower fixing plate, second sliding grooves are formed in the upper edges of the inner sides of the two longitudinal pieces of the lower fixing plate respectively, and second sliding rails are formed in the lower edges of the inner sides of the two longitudinal pieces of the lower fixing plate respectively; the longitudinal piece of the upper sliding plate is inserted into the notch of the lower fixing plate, the first sliding groove of the upper sliding plate is matched with the second sliding rail of the lower fixing plate, and the first sliding rail of the upper sliding plate is matched with the second sliding groove of the lower fixing plate, so that the upper sliding plate can move longitudinally relative to the lower fixing plate.

Preferably, the upper sliding plate and the lower fixing plate are both titanium plates with the thickness of 2.0-5.0 mm.

Preferably, when the fixing plate is used for fixing lumbar vertebrae, the cross section of the second sliding chute is designed into a flat-bottom isosceles trapezoid.

Preferably, when the sliding adjustable type vertebral body anterior fixing plate is used for fixing a thoracic vertebra, the cross section of the second sliding chute is designed into a convex-bottom isosceles trapezoid.

Due to the adoption of the technical scheme, the invention has the following advantages: 1. the upper sliding plate and the lower fixing plate adopt sliding structures with sliding grooves and sliding rails on two sides, so that the sliding mode is stable and reliable, and the anti-torsion strength can be effectively improved. 2. According to the invention, the first sliding groove of the upper sliding plate and the second sliding groove of the lower fixing plate are not provided with active pressurizing structures in the longitudinal direction, so that a slight longitudinal sliding space can be provided for artificial vertebral body replacement, the press fit and bone ingrowth of the artificial vertebral body and upper and lower residual vertebral bodies are promoted, and the long-term stability of the spine is maintained. 3. The passive self-locking function of the invention prevents the fixed vertebral body from angular displacement and compressive displacement, namely when the spine posterior column is fixed (complete through a pedicle screw rod system or the posterior column) and the spine of the fixed segment has excessive vertebral body compression or kyphosis, the slight elastic deformation of the upper and lower fixing plates can lead the sliding resistance inside the sliding chute to be increased sharply, thereby effectively avoiding the further great displacement of the fixed vertebral body. 4. The invention adopts the assembly mode for connection, the upper sliding plate and the lower fixing plate component with different lengths can be selected according to the situation in the operation, and the centrum anterior fixing plate with any length can be obtained after the connection, thereby meeting the reconstruction requirements of different defect lengths in the operation.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of a second chute according to an embodiment of the invention;

fig. 3 is a schematic cross-sectional view of a second chute according to another embodiment of the invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

As shown in fig. 1, the sliding adjustable anterior vertebral fixing plate provided by the invention comprises: the upper sliding plate 1 is T-shaped, an upper sliding plate locking nail hole 3 is formed in a transverse plate of the upper sliding plate 1, first sliding grooves 5 are formed in the lower edges of two sides of a longitudinal plate of the upper sliding plate 1 respectively, and first sliding rails (not shown in the figure) are formed in the upper edges of two sides of the longitudinal plate of the upper sliding plate 1 respectively; the lower fixing plate 2 is concave, a transverse plate of the lower fixing plate 2 is provided with a lower fixing plate locking nail hole 4, the inner upper edges of two longitudinal plates of the lower fixing plate 2 are respectively provided with a second sliding chute 6, and the inner lower edges of the two longitudinal plates of the lower fixing plate 2 are respectively provided with a second sliding rail (not shown in the figure). The longitudinal piece of the upper sliding plate 1 is inserted into the notch of the lower fixing plate 2, the first sliding groove 5 of the upper sliding plate 1 is matched with the second sliding groove 6 of the lower fixing plate 2, and the first sliding groove of the upper sliding plate 1 is matched with the second sliding groove 6 of the lower fixing plate 2, so that the upper sliding plate 1 can move longitudinally relative to the lower fixing plate 2.

In the above embodiment, preferably, the upper sliding plate 1 and the lower fixing plate 2 both use titanium plates with a thickness of 2.0-5.0mm, so that when the fixed vertebral body is slightly angularly displaced or compressed, the upper sliding plate 1 and the lower fixing plate 2 will slightly elastically deform, so that the sliding resistance inside the sliding chute is sharply increased, and further large displacement of the fixed vertebral body can be effectively avoided

In the above embodiment, preferably, when the fixing plate is used for fixing lumbar vertebrae, the cross section of the second sliding groove 6 is designed to be a flat-bottom isosceles trapezoid (as shown in fig. 2), and when the fixing plate is used for fixing thoracic vertebrae, the cross section of the second sliding groove 6 is designed to be a convex-bottom isosceles trapezoid (as shown in fig. 3) to match the curvature of lumbar vertebrae or thoracic vertebrae, thereby reducing interference with soft tissues around the fixing plate.

The above embodiments are only used for illustrating the present invention, and the structure, connection mode, manufacturing process, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.