CN2191635Y - Angle bone plate - Google Patents

Abstract

The utility model relates to an angle bone plate, which is characterized in that a piece of lath-shaped steel plate is bended along the center of the vertical axis of the steel plate; the angular separation of two wings of the steel plate is from 80 DEG to 100 DEG; a plurality of screw holes are equidistantly arranged on both sides of a center hole distance; an angle bone plate with a concave surface and a convex surface is formed. According to the used differences, the utility model can be respectively made into the bone plates with different specifications of from two to eight holes. Compared with a common bone plate, the resistance thereof can be improved by 450% through tested; compared with a pressurizing steel plate with a same cross section sectional, the resistance thereof can be improved by 83%; the utility model is suitable for the fractures of various regions; the utility model can avoid the dysfunctions of muscular dystrophy and arthrocleisis, caused by long-time plaster braking.

Description

Angle bone plate

This utility model relates to a kind of medical apparatus and instruments of orthopaedics, particularly a kind of dihedral blade plate that is applicable to the different parts fracture.

The blade plate of present clinical use mainly contains two kinds of fracture bone plate and pressurized bone plates, and is existing as follows in problem:

1. fracture bone plate: the fracture bone plate anti-bending strength is relatively poor, and easy stress deformation becomes the angle and fractures, and after the fixing fracture, must cooperate strong external plaster fixation, otherwise cause the displacement of fracture end.Two hole steel plates can not make fracture end be stablized, and as behind the fixing fracture end, even used strong external plaster fixation, but still have the part patient one-tenth angle, the rotation displacement of fracture end to occur.

2. pressurized bone plate: the pressurized bone plate bending strength increases than fracture bone plate; But, also enlarge markedly with the contact area of sclerotin because steel plate brightness obviously increases; The biological property of sclerotin is substituted by steel plate, and the stress-shielding effect that sclerotin is produced also obviously increases; Extended immobilization makes fracture end produce ischemia, decalcification, osteoporosis, atrophy etc.; After the union of fracture, still need within a short period of time the external plaster fixation of a period of time to be protected, prevent the fracture end refracture.The refracture rate of using pressurized bone plate to cause can reach about 20%, and secular external fixation makes the muscle joint can not obtain due activity, causes and hinders limb amyotrophy, the ankylosis function limitation.Remove and need long period restore funcitons gradually behind the external fixation.

The purpose of this utility model is a kind of dihedral blade plate that provides avoiding above-mentioned the deficiencies in the prior art.

The purpose of this utility model takes following measure to realize:

It is 80 °～100 ° that a lath-shaped steel plate is bent into two interplane angles with blade plate longitudinal axis center, and outward appearance is angle steel shape for building, equidistantly on the both sides of centre bore distance has several screws, forms the dihedral blade plate of a concave surface, convex surface.According to clinical practice fracture site difference, the blade plate of two holes to all types of different sizes of octal arranged respectively.

Accompanying drawing and drawing explanation:

Fig. 1 is the structural representations of two holes of the present utility model to octal;

Fig. 2 is a principle schematic of the present utility model.

Wherein: ［ 1 ］--side opening distance, ［ 3 ］--angle, ［ 4 ］--screw, ［ 5 ］--both wings, ［ 6 ］--concave surface, ［ 7 ］---convex surface--are close in centre bore distance, ［ 2 ］.

Below in conjunction with accompanying drawing the new enforcement of this practicality is described in further detail:

The design of dihedral blade plate is to develop according to leg-of-mutton stability structure and 3 power principles of mechanics, this blade plate adopts the thick corrosion resistant plate of 2～3mm, it is wide to be made into 2cm, making length according to required difference is all kinds of shape lath-shapeds of 4cm～15cm, being bent into angle ［ 3 ］ with blade plate longitudinal axis center is 80 °～100 ° dihedral plate, then at centre bore apart from the equidistant punching in both sides of ［ 1 ］.Used screw is identical with the fracture bone plate screw.

Expose fracture end during operation, peel off periosteum or do not peel off periosteum, with dihedral blade plate concave surface ［ 6 ］, both wings ［ 5 ］ ride in the fracture end center, temporarily brake with the epiphysis holder, are holed to distal bone cortex by near-end to screw ［ 4 ］ with bone drill, be screwed into the Len req screw then, pine epiphysis holder, the inspection fracture end is fixed, and finishes operation.

The wide of this utility model both wings ［ 5 ］ is: 6mm～15mm; Being close to side opening apart from ［ 2 ］ is: 1cm～1.5cm; Centre bore apart from ［ 1 ］ is: 1.5cm～5cm.

Fig. 2 is a schematic diagram of the present utility model.Behind the blade plate of dihedral shown in the figure bone fixation bar, ABC and ACO, BCO all form triangle, and 2 of AB touch mutually with sclerotin, also be subjected to certain stress, the O point is worn the offside cortical bone through the nearside cortical bone, and is stressed big slightly, 3 all are subjected to certain stress, so it is relative stable that the bone bar is in, and resting state.Illustrate that as figure ［ 2 ］ change has taken place the direction of screw, change has also taken place in the size of moment, but leg-of-mutton rock-steady structure and 3 power principles then remain unchanged.

Effect of the present invention and advantage:

1. the angle bone plate bending strength is big, improves 45% by test than plain bone plate, than the pressurized bone plate raising 83% of same cross-sectional. The angulation displacement that is difficult for forming fracture end after the fixing fracture, the fixing fracture of two hole steel plates is still identical with the stephanoporate steel plate effect. After the fixing fracture of angle bone plate, because the bone plate both wings to the stress that stops of bone bar, make fracture end be difficult for forming angle, rotation displacement equally.

2. union is accelerated. After the fixing fracture of angle bone plate, bone plate only is the stringer wire with the bone bar and contacts, and the center, bight does not contact with the bone bar, is the hollow form gap, does not basically affect the blood circulation of fracture end, is conducive to the growth of surgery scab, and union is accelerated.

3. the dihedral blade plate is good for comminuted fracture and bone lengthening effect.According to the fixing fracture of dihedral blade plate principle, so, fix a side seam cortex, still keep the stability of fracture end for the feasible multi-direction screw that advances of comminuted fracture, it is still good in like manner to be used for the bone lengthening effect.

4. be used for fracture of upper limb and can not need external plaster fixation, amyotrophy and the joint function disturbance of having avoided long-term Gypsum Fibrosum braking to form.

Claims (2)

1, a kind of dihedral blade plate, it is characterized in that: is 80 °～100 ° with a lath-shaped steel plate with the angle [3] that blade plate longitudinal axis center is bent between both wings [5], outward appearance is angle steel shape for building, at both sides equidistant the have several screws [4] of centre bore, form the dihedral blade plate of a concave surface [6], convex surface [7] apart from [1].

2, dihedral blade plate according to claim 1 is characterized in that: according to the difference of clinical practice fracture site, the screw of blade plate has two holes to octal.

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