CN201029925Y

CN201029925Y - Internal fixing device for skull lamella

Info

Publication number: CN201029925Y
Application number: CNU200720031350XU
Authority: CN
Inventors: 王茂德; 黄传贵; 胡立人
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-09
Filing date: 2007-03-09
Publication date: 2008-03-05
Anticipated expiration: 2017-03-09

Abstract

Disclosed is an inner fixing device for locking bone flaps of skull comprising an elongated bolt (1), an circular upper cover (2) and a lower cover (3) which are provided with a spherical surface arc with physiological curvature of skull, wherein the centre of the lower end surface of the upper cover (2) is installed with a boss (4) on which inner screwed holes (5) are equipped, the upper portion of the upper cover (2) is symmetrically mounted with two through-holes (6), the upper cover (2) is pivoted on the elongated bolt (1) by the inner screwed holes (5), and the lower cover (3) is fixed on the lower end of the elongated bolt (1). The utility model is designed on the basis of Chinese body, being applicable to physiological characteristics of Chinese body, and the upper cover with spherical surface arc with physiological curvature of skull is positioned with step screwed holes and a groove for preventing loosing and backing, enabling the upper cover and the bolt to have an enough connecting intensity. The lower cover is equipped with an anti-release shift outjutting rib and the outer rim is disposed with a jagged embossment, enabling the locking to be firmer, and the looseness, the breaking, the pull-out and the pull-off can not happened in the process of the operation and after the operation.

Description

Cranial bone flap locking inner fixing device

Technical field

This utility model relates to the cranial bone flap locking inner fixing device that a kind of surgical operation uses.

Background technology

Along with the continuous development of Clinical Science technology, abroad the cranial bone flap inner fixing device made from the titanium metal material Design and Machining has been widely used in domestic clinically, and curative effect has also obtained approval.But the in use relevant auxiliary fixer tool design of its product bulky complex, clinical manipulation gets up comparatively loaded down with trivial details, break down easily, and product price is very expensive.Especially the bone lobe fixing and locking device matching design of product is not really desirable, in use causes locking not firm easily, even phenomenons such as the perk that comes off, fracture.

Summary of the invention

The technical problem that this utility model solves: design the cranial bone flap locking inner fixing device that a kind of surgical operation uses.With Chinese's human body is that basic engineering is made, be fit to the Chinese human physilogical characteristic, and its sphere arc loam cake with skull physiology curvature is provided with step screwed hole and locking back stop slot, make loam cake and screw rod have enough bonding strengths between the two, cover the locking displacement that is provided with down and stretch out the zigzag projection that has on rib and the outer rim, make locking more firm, all can not occur becoming flexible, rupture, withdraw from obscission and take place with postoperative in the art.

Technical solution of the present utility model: a kind of cranial bone flap locking inner fixing device, by elongate threaded screw (1), and sphere arc circular upper cover (2), lower cover (3) with skull physiology curvature constitute, the central authorities of loam cake (2) lower surface are shaped on boss (4), be shaped on internal thread hole (5) on the boss (4), loam cake (2) is gone up symmetry and is shaped on two through holes (6), and loam cake (2) by internal thread hole (5) spinning on elongate threaded screw (1), lower cover (3) is fixed on the lower end of elongate threaded screw (1).

The outer rim of described lower cover (3) is made zigzag projection (7), and the middle part is shaped on evenly distributed fan-shaped hole (8), and edge is shaped on locking displacement and stretches out rib (9).

The first half of described elongate threaded screw (1) is a polished rod, and Lower Half is a screw rod.

Be shaped on locking back stop slot (10) on the described loam cake (2).

Described loam cake (2) is an overall structure with boss (4).

Be installed with supporting locking instrument (11) on the described elongate threaded screw (1), supporting locking instrument (11) is positioned at the top of loam cake (2), and two the symmetrical cylinders (12) on its lower surface are inserted in two through holes (6) on the loam cake (2).

Advantage that this utility model compared with prior art has and effect:

1, the lower end design of loam cake central authorities has the internal thread hole of boss type, loam cake passes through the internal thread hole spinning on elongate threaded screw, not only increased effective syndeton length of loam cake and screw rod, make and have enough bonding strengths between the two, and the boss of loam cake central authorities lower end can sink in the skull slit after locking automatically, making loam cake seamlessly transit to fit tightly in skull surface by skull physiology curvature does not have any projection, and no occupy-place effect produces.

2, cover on be shaped on locking back stop slot can effectively prevent loam cake in art and postoperative occur becoming flexible, withdraw from obscission and take place.

3, cover two through holes that symmetry is shaped on, can use two symmetrical cylinders on the supporting locking instrument to insert in two through holes on the one hand, equilibrium is firmly tightened loam cake and is finished locking, when another side can also guarantee the intracranial second operation, unclamp loam cake with the locking instrument once more by two through holes, open skull and finish operation.

4, lower cover and skull bottom surface physiology curvature fit like a glove, and no occupy-place effect produces, and can not injure cerebral dura mater.

5, the locking displacement in lower cover edge is stretched out rib and is stuck in the skull slit, and has the zigzag projection on the outer rim, and when the locking instrument was tightened loam cake, lower cover did not rotate, and had not only effectively protected cerebral dura mater, and had made locking more firm, and reliability is higher.

Description of drawings

Fig. 1 is a structural representation of the present utility model,

Fig. 2 is the structural representation of this utility model loam cake,

Fig. 3 is the structural representation of this utility model lower cover.

The specific embodiment:

1,2,3 a kind of embodiment of the present utility model is described in conjunction with the accompanying drawings.

A kind of cranial bone flap locking inner fixing device, by elongate threaded screw (1), and sphere arc circular upper cover (2), lower cover (3) with skull physiology curvature constitute, and the central authorities of loam cake (2) lower surface are shaped on boss (4), and loam cake (2) is an overall structure with boss (4).Be shaped on internal thread hole (5) on the boss (4), loam cake (2) is gone up symmetry and is shaped on two through holes (6), and on elongate threaded screw (1), the lower end of elongate threaded screw (1) is riveted or be welded on to lower cover (3) to loam cake (2) by internal thread hole (5) spinning.Be installed with supporting locking instrument (11) on the elongate threaded screw (1), supporting locking instrument (11) is positioned at the top of loam cake (2), and two the symmetrical cylinders (12) on its lower surface are inserted in two through holes (6) on the loam cake (2).In addition, be shaped on locking back stop slot (10) on the loam cake (2); The outer rim of lower cover (3) is made zigzag projection (7), and the middle part is shaped on evenly distributed fan-shaped hole (8), and edge is shaped on locking displacement and stretches out rib (9); The first half of elongate threaded screw (1) is a polished rod, and Lower Half is a screw rod.

Using method

The first step: open taking-up cranial bone flap locking inner fixing device with aseptic method, check and reaffirm that all are intact.

Second step: after the skull sheet that shifts out incision is finished operation, lay several cranial bone flap locking inner fixing devices by demand is equidistant around the skull otch, and guarantee that lower cover is placed between cerebral dura mater and the skull, it is vertical that elongate threaded screw keeps in the skull otch; The locking displacement that the lower cover edge is shaped on is stretched out rib and is stuck between skull otch and the skull sheet slit, and lower cover outer rim zigzag projection is close to the skull inner surface.

The 3rd step: two on the supporting locking instrument symmetrical cylinders are inserted in two through holes that cover, be docile and obedient all loam cakes of clockwise balanced rotation by cornerwise order, all touch skull until all loam cakes, and then all loam cakes are firmly tightened in equilibrium according to this, fit tightly after the skull upper surface until locking back stop slot, firmly break supporting locking instrument off with the fingers and thumb in the equilibrium of left-right symmetric direction, break disconnected screw rod off with the fingers and thumb until supporting locking instrument and expose loam cake, supporting locking instrument with break disconnected screw portion off with the fingers and thumb and break away from loam cake simultaneously and finish locking.

Claims

1. a cranial bone flap is locked inner fixing device, it is characterized in that: described fixture is by elongate threaded screw (1), and sphere arc circular upper cover (2), lower cover (3) with skull physiology curvature constitute, the central authorities of loam cake (2) lower surface are shaped on boss (4), be shaped on internal thread hole (5) on the boss (4), loam cake (2) is gone up symmetry and is shaped on two through holes (6), and on elongate threaded screw (1), lower cover (3) is fixed on the lower end of elongate threaded screw (1) to loam cake (2) by internal thread hole (5) spinning.

2. cranial bone flap locking inner fixing device according to claim 1, it is characterized in that: the outer rim of lower cover (3) is made zigzag projection (7), and the middle part is shaped on evenly distributed fan-shaped hole (8), and edge is shaped on locking displacement and stretches out rib (9).

3. cranial bone flap locking inner fixing device according to claim 1, it is characterized in that: the first half of elongate threaded screw (1) is a polished rod, Lower Half is a screw rod.

4. cranial bone flap locking inner fixing device according to claim 1 is characterized in that: be shaped on locking back stop slot (10) on the loam cake (2).

5. according to claim 1 or 2 or 3 or 4 described cranial bone flap locking inner fixing devices, it is characterized in that: loam cake (2) is an overall structure with boss (4).

6. according to claim 1 or 2 or 3 or 4 described cranial bone flap locking inner fixing devices, it is characterized in that: be installed with supporting locking instrument (11) on the elongate threaded screw (1), supporting locking instrument (11) is positioned at the top of loam cake (2), and two the symmetrical cylinders (12) on its lower surface are inserted in two through holes (6) on the loam cake (2).