CN2815291Y

CN2815291Y - Universal self-locking internal-fixing stent

Info

Publication number: CN2815291Y
Application number: CN 200520106543
Authority: CN
Inventors: 陈�光
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-31
Filing date: 2005-08-31
Publication date: 2006-09-13
Anticipated expiration: 2015-08-31

Abstract

The utility model belongs to a medical appliance, particularly an internal-fixing device for realizing fracture contraposition line stand for osteoporotic fracture in fracture treatment. The universal self-locking internal-fixing stent has the improvement that a bone grafting steel plate 1 is provided with a hole; an expanding ring 2 is arranged in the hole and is provided with an opening; a limiting pin 4 is arranged in the opening and is fixed on the bone grafting steel plate; a locking screw nail 3 penetrates through the expanding ring 2; the universal self-locking internal-fixing stent uses an internal-fixing stent mode of locking between the screw nail and the steel plate; the screw nail is screwed at different angles according to the requirements, and simultaneously, the mutual locking between the nail and the plate can be realized. The utility model achieves firm angle fixation, realizes biological stable environment required by fracture cicatrization, and solves the problem of the failure of an internal-fixing object caused by the loosening or the shedding of the screw nail due to the lacking holding force of bones.

Description

Universal type self-locking inner fixed support

Technical field

This utility model relates to a kind of medical apparatus and instruments, especially relates to a kind of inner fixing device of in the fractures osteoporotic fracture being realized the upright line of fracture para-position that belongs to.

Background technology

At present, the stability of the steel plate that the fracture internal fixation uses depends on the friction between steel plate and the skeleton, and need improve reliability of fixation by the frictional force that the screw pressurization increases between steel plate and the skeleton, this just requires the fixed skeleton of steel plate that cortical bone is preferably arranged, but can not provide enough holds under the osteoporotic situation, the loosening of screw often occur and come off, thereby influence fixed effect, adopting the inner fixed support that locks between screw and the steel plate is a kind of good selection.Though the self-locking compression steel plate of foreign scholar's release has recently been realized this target, but the screw of band elongated insertion part can't free translation-angle, must vertically be screwed into along the centrage of screwed hole, otherwise just can not reach certain screw snap close and reduce the stability of internal fixation, the displacement that can cause steel plate when screwing in owing to the reason of fixed angle simultaneously is unfavorable for fracturing reset with to line, also when using bilateral os integumentale screw or screw to touch opposite side cortex, may cause the splitting of contiguous cortical bone, occur bending and deformation and to cause screw to be screwed into difficulty as steel plate in the use by the aiming handle because of this defective.

Summary of the invention

The purpose of this utility model just provides a kind of novel universal type self-locking inner fixed support, have according to sclerite fixedly needs adjust the screw angle, can make the characteristics of secure lock between nail-plate simultaneously again.

The purpose of this utility model is realized by following technical scheme: this universal type self-locking inner fixed support, its improvements are that synthetism steel plate 1 is provided with the hole, expansion loop 2 is put into this hole, described expansion loop 2 is provided with opening, spacer pin 4 is positioned at this mouth, and is fixed on the synthetism steel plate 1; Lock screw 3 penetrates expansion loop 2.

Above-mentioned universal type self-locking inner fixed support, the hole on the described synthetism steel plate 1 is the ball-and-socket shape.

Above-mentioned universal type self-locking inner fixed support, the medial surface of described expansion loop 2 is provided with the taper female thread, and lateral surface is the part of spherical.

Above-mentioned universal type self-locking inner fixed support, the head of described lock screw 3 is the taper external screw thread.

This universal type self-locking inner fixed support, adopt the inner fixed support mode that locks between screw and the steel plate, be screwed into screw by different angles as required, realize locking mutually between nail-plate simultaneously, reach firm fixed angle, realize the Biostatic environment that union of fracture needs, solved because of the not enough screw loosening that occurs of sclerotin hold or come off, thereby caused the problem of inside-fixture inefficacy.

Description of drawings

Fig. 1 is a structure cut-away view of the present utility model;

Fig. 2 is an attached view of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing this utility model is described in further detail:

See also Fig. 1 to shown in Figure 2, synthetism steel plate 1 is provided with ball-and-socket shape hole among the figure, and expansion loop 2 is put into this hole.The medial surface of expansion loop 2 is provided with the taper female thread, and lateral surface is the part of spherical.The head of lock screw 3 is the taper external screw thread, and body is a coarse-pitch thread, and head end is provided with interior hexagonal groove.The lateral surface of expansion loop 2 matches with the ball-and-socket shape nail hole of synthetism steel plate 1, and medial surface spins mutually with the head taper screw thread of lock screw 3.The body coarse-pitch thread and the cortical bone of lock screw 3 are joined.Expansion loop 2 is provided with opening, and spacer pin 4 is positioned at this mouth, and is fixed on the synthetism steel plate 1, and expansion loop 2 rotates thereupon in the time of can preventing to be screwed into screw.When lock screw 3 was screwed into expansion loop 2, the expansion loop 2 with opening expanded thereupon, and expansion loop 2 is closely contacted with synthetism steel plate 1, thereby realized the nail-plate locking.

During use, after fracture resets indirectly, synthetism steel plate 1 is inserted by mini-incision, and be temporarily fixed on the far-end or near-end bone of fracture, determine the position in synthetism steel plate 1 nail hole by sight, on different directions, be screwed into lock screw 3 as required, and finish the locking of lock screw 3 and 1 of synthetism steel plate, utilize the angle Stabilization realization inner fixed support that produces fixation of fractures by the expansion loop 2 in the synthetism steel plate 1 nail hole.

Claims

1, a kind of universal type self-locking inner fixed support is characterized in that synthetism steel plate (1) is provided with the hole, and expansion loop (2) is put into this hole, and described expansion loop (2) is provided with opening, and spacer pin (4) is positioned at this mouth, and is fixed on the synthetism steel plate (1); Lock screw (3) penetrates expansion loop (2).

2, a kind of universal type self-locking inner fixed support according to claim 1 is characterized in that the hole on the described synthetism steel plate (1) is the ball-and-socket shape.

3, a kind of universal type self-locking inner fixed support according to claim 1 is characterized in that the medial surface of described expansion loop (2) is provided with the taper female thread, and lateral surface is the part of spherical.

4, a kind of universal type self-locking inner fixed support according to claim 1, the head that it is characterized in that described lock screw (3) is the taper external screw thread.