CN205073000U - One -way intervertebral fusion fixing device of cervical vertebra - Google Patents

Abstract

The utility model relates to a novel cervical one-way intervertebral fusion fixation device. The cervical unidirectional intervertebral fusion fixation device described in the utility model comprises a screw fixing part at the front end and an intervertebral fusion part at the rear end; the left and right sides of the screw fixing part are respectively provided with symmetrically distributed screw holes, and the screw holes The hole is inclined so that the screw can pass through the screw hole to fix the intervertebral fusion part on the end plate of the lower vertebral body of the dislocated facet joint; a locking device is provided between the screw holes for inserting the intervertebral fusion The screws in the above screw holes are locked to prevent the screws from protruding, so that the intervertebral fusion part is suitable to be placed between the two vertebral bodies after the bilateral facet joint dislocation of the cervical spine is reset, and is used to replace the intervertebral disc removed in the cervical spine surgery. The device can reduce the complexity of cervical spine surgery, achieve better stability and fixation, and reduce trauma to patients.

Description

Cervical one-way intervertebral fusion fixation device

technical field

The utility model relates to an orthopedic clinical instrument, in particular to a cervical unidirectional intervertebral fusion fixation device.

Background technique

For cervical spine injuries, especially traumatic complete dislocation of the upper and lower articular surfaces is more serious, common in cervical 5/6 and cervical 6/7, and the curative effect after surgical treatment will be affected by many factors, including nerve Injury, dislocation of intervertebral disc, rupture of endplate, dislocation of cervical joints, severe posterior longitudinal ligament injury, choice of reduction method, success or failure, experience of the operator, etc. Surgical methods include purely anterior approach, purely posterior approach, anterior-posterior approach, posterior-anterior approach, and anterior-posterior-anterior approach, with the most commonly used approach being anterior-posterior approach , especially for patients with bilateral cervical dislocation with disc rupture and herniation of the nucleus pulposus. Fixation with plates and screws, or even simple anterior decompression such as fragmented cancellous bone filling. In the above anterior-posterior surgery methods, the failure to fix after anterior decompression obviously makes the patient turn over for posterior fixation, which has a great risk of spinal cord compression, and its own stability is not enough. As for the anterior decompression and one-way fixation, there is no special anterior cervical one-way fusion fixator for stable fixation. The cages commonly used in clinical practice usually do not have the function of fixation, but an anterior cervical plate is needed to assist screw fixation to prevent the intervertebral fusion cage from prolapse. In recent years, some scholars have invented an anterior cervical intervertebral rivet fusion device with bidirectional screw fixation function, and it has been well applied clinically. However, this fusion device cannot be used for the flexion and stretching of the lower cervical spine with disc rupture and articular interlocking injuries. Therefore, it is necessary to develop a new cervical unidirectional intervertebral fusion fixation device.

Contents of the invention

The purpose of the utility model is to provide a new type of cervical unidirectional intervertebral fusion fixation device, which can reduce the complexity of cervical spine surgery, achieve better stability and fixation effect, and reduce trauma to patients.

The cervical unidirectional intervertebral fusion fixation device described in the utility model comprises a screw fixing part at the front end and an intervertebral fusion part at the rear end; the left and right sides of the screw fixing part are respectively provided with symmetrically distributed screw holes, and the screw holes The holes are inclined so that screws can pass through the screw holes to fix the intervertebral fusion part on the end plate of the lower vertebral body of the dislocated facet joint; a locking device is provided between the screw holes for inserting the intervertebral fusion The screw in the screw hole is locked to prevent the screw from protruding, so that the intervertebral fusion part is suitable to be placed between the two vertebral bodies after the bilateral facet joint dislocation of the cervical spine is reset, and is used to replace the intervertebral disc removed in the cervical spine operation.

According to a further feature of the cervical unidirectional intervertebral fusion fixation device of the present invention, the inclination direction of the screw hole forms an angle of 30 degrees with the cage.

The cervical unidirectional intervertebral fusion and fixation device described in the utility model is a specially designed intervertebral fusion and fixation device suitable for cervical bilateral facet joint dislocation through the anterior cervical approach. Or use a non-specific plate and screw fixation method, which can better reset the cervical spine and maintain its stability, and is more conducive to simplifying the surgical process.

Description of drawings

Fig. 1 is a schematic side view of the cervical unidirectional intervertebral fusion fixation device described in the present invention.

Fig. 2 is a schematic front view of the cervical unidirectional intervertebral fusion fixation device described in the present invention.

reference sign

1: screw fixing part; 2: locking device; 3: screw hole; 4: intervertebral fusion part.

detailed description

The cervical unidirectional intervertebral fusion fixation device described in the utility model, as shown in Fig. 1 and Fig. 2, the device comprises a screw fixing part 1 at the front end and an intervertebral fusion part 4 at the rear end; The screw holes 3 are arranged symmetrically on each side, and these screw holes 3 are inclined so that the screws can pass through the screw holes 3 to fix the intervertebral fusion part 4 on the end plate of the lower vertebral body of the dislocated facet joint; between these screw holes 3 There is a locking device 2 between them, which is used to lock the screw inserted into the screw hole 3 to prevent the screw from coming out, so that the intervertebral fusion part 4 is suitable to be placed between the two vertebral bodies after the bilateral facet joint dislocation of the cervical spine is reset, and is used to replace the cervical vertebrae. A disc removed during surgery.

In a preferred embodiment, the direction of inclination of the screw holes forms an angle of 30 degrees with respect to the cage.

According to the above design principle, a series of different models of products can be prepared according to the specific data of individual differences of different patients, and different models can be selected for matching use according to the specific conditions during the operation.

Claims (2)

1. the unidirectional intervertebral fusion fixture of cervical vertebra, is characterized in that, described device comprises the screw fixed part of front end and the intervertebral fusion portion of rear end; The arranged on left and right sides of described screw fixed part arranges symmetrical screw respectively, and described screw is that described intervertebral fusion portion is fixed on the soleplate of the lower joint vertebral body of dislocation Minor articulus by inclination so that screw by described screw; Locking device is provided with between described screw, for the screw inserting described screw is pinned in order to avoid screw is deviate from, so that described intervertebral fusion portion is applicable to being placed on cervical bilateral dislocation and is resetted between rear two vertebral bodys, for the intervertebral disc extractd in alternative cervical operation.

2. the unidirectional intervertebral fusion fixture of cervical vertebra according to claim 1, is characterized in that: the incline direction of described screw becomes the angle of 30 degree with fusion device.