CN1276194A

CN1276194A - Artificial fibula

Info

Publication number: CN1276194A
Application number: CN 99115792
Authority: CN
Inventors: 贺西京
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-07
Filing date: 1999-06-07
Publication date: 2000-12-13
Anticipated expiration: 2019-06-07
Also published as: CN1139369C

Abstract

An artificial fibula is composed of two supporting rods and a link block to link said two supporting rods with adjustable length. The needle or supporting plate at broken end of fibula can be inserted into the end of said supporting rod to link two broken fibula segments and support them for higher integrity.

Description

A kind of artificial fibula

The present invention is the artificial fibula in a kind of human implantable.

The human body fibula is because of suffering from tumor or chronic osteomyelitis or as the bone grafting donor, all may be by big section excision, after the excision, as not doing any processing, just may cause the ankle joint shakiness, loose, turn up and complication such as the long-term pain of ankle joint, therefore, in prior art, the fibula that blocks is handled in fixed measure between tibiofibula commonly used, promptly walks crosswise the far-end (as shown in Figure 3) that screw 2 is fixed in the far-end (heart is with an end far away) of fibula 3 on tibia 4 with one to two piece above ankle joint 1.Use above-mentioned measure meeting and change the motion of normal fibula and stressed, the activity of Jower tibiofibular joint is disappeared, especially under the shank stressing conditions, can produce great shear forces between tibiofibula, cause probably and walk crosswise screw extraction; Moreover, use this measure and fail to make above-mentioned complication to be able to obvious improvement.For this reason, academia studies for a long period of time, and up to the present, not seeing yet has preferably that measure addresses the above problem.

The objective of the invention is provides a kind of artificial fibula at the problem in the prior art, makes its integrity that can rebuild fibula, thereby recovers limb function, reaches the purpose of partially or completely eliminating above-mentioned complication.

For achieving the above object, the present invention has at first carried out experiment and academic research, promptly adopt FEM (finite element) model to analyze of the influence of different art formulas to fibula and ankle joint force-bearing situation, specifically: be utilization finite element program software set up respectively behind just often fibula model, the intercepting fibula with screw fixedly fibula and tibia the fibula model, reach respectively fibula model with medical stainless steel and titanium alloy material recovery fibula integrity, and carrying out Stress calculation, the gained result compares with variance nonhomogeneity t check.Above-mentioned result of study shows: the integrity of rebuilding fibula is feasible, after rebuilding fibula, the stress distribution of bone with just often do not have significant difference (as shown in Figure 4), guaranteed ankle joint stability, be beneficial to complication such as partially or completely eliminating the unstable and pain of postoperative ankle joint.According to this result of study, the concrete solution that the present invention takes is as follows: this artificial fibula is made up of two support sticks and a contiguous block, and described two support stick tail tails intersect to be arranged, and is bound up by described contiguous block; The head of described support stick is provided with the pricker pin and the fibula broken ends of fractured bone supporting slice that can insert in the fibula broken ends of fractured bone pulp cavity, and the excellent body of this support stick and contiguous block are provided with the short movable connection structure of scalable rod height.

By above-mentioned solution as can be seen, this artificial fibula can insert by the pricker pin of two support stick heads in the upper and lower broken ends of fractured bone of the fibula chamber, and the fibula section that makes this artificial fibula replace blocking plays connection and supporting role, has rebuild the integrity of fibula preferably.The present invention has been carried out the clinical practice of tens examples by counties and cities' level hospital under confidential situation, postoperative through 3～5 years follow up a case by regular visits to, is not found significant complications, and its limb function is normal fully.The result shows that the fibula of using the present invention's reconstruction can make the calf biomethanics structure approach normal shank substantially, can eliminate above-mentioned complication substantially.Also show that the present invention also has is rational in infrastructure, easy to operate advantage in the art through clinical practice.

Describe structure of the present utility model and operation principle in detail according to embodiment below.

Fig. 1, overall structure figure of the present invention.

Fig. 2, working state schematic representation of the present invention.

Fig. 3, the working state schematic representation of prior art.

Fig. 4, one of finite element experimental curve diagram.

Fig. 5, two of finite element experimental curve diagram.

Referring to Fig. 1, described two support sticks, 7,8 tail tails intersect, and link together by contiguous block 9; The head of described support stick 7,8 is provided with a pricker pin 7.1 or 8.1 and fibula broken ends of fractured bone supporting slice that can insert in the fibula broken ends of fractured bone pulp cavity; For the ease of making, described supporting slice is enclosed within by a handle sheet 7.2 that is located at pricker backshank end or 8.2 and one that big ring plate 10 or 11 constitutes on the pricker pin; On support stick and contiguous block, be provided with movable connection structure, this movable connection structure can by be located at rod on one's body a plurality of radially boss of arranging of axially spaced-apart and be located at excellent body via hole on the contiguous block and excellent body radially snap ring 12 or 13 constitute, described a plurality of boss is coniform boss 7.4 or 8.4, and this support stick is by excellent body radially snap ring 12 or 13 fastening being fixed on the contiguous block 9.Snap ring axially fastens the length that support stick is regulated in the position on one's body at rod by adjusting radially.Described movable connection structure also can by rod on one's body male thread and the female spiral hole on the contiguous block constitute.The material of this artificial fibula can adopt medical stainless steel or titanium alloy etc., its duty as shown in Figure 2, sequence number 14 is an artificial fibula among the figure.

Referring to Fig. 4, shown in the figure is with the fibula of medical stainless steel and titanium alloy material reconstruction and the FEM (finite element) model stress one strain experimental curve diagram of normal fibula, curve I is the stress branch curve of normal fibula model among the figure, curve V is a stress branch curve of rebuilding the fibula model with medical stainless steel, curve VI is a stress branch curve of rebuilding the fibula model with titanium alloy, as can be seen from the figure, curve V, VI are relatively near curve I, and the biomethanics structure basically identical of fibula and normal fibula is rebuild in this explanation.

Referring to Fig. 5, among the figure curve IV be the part fibula by amputation after to walk crosswise the fixedly stress branch curve of tibiofibula model of screw.This curve is compared with curve I among Fig. 4 and is differed greatly, and causes Lower limb bone stressed unusual after this explanation is fixed with the spiral shell pin, and its effect differs greatly with the effect of rebuilding the fibula model.

Claims

1, a kind of artificial fibula is characterized in that:

A, it is made up of two support sticks (7), (8) and a contiguous block (9), and described two support stick tail tails intersect to be arranged, and is bound up by described contiguous block;

The head of b, described support stick is provided with pricker pin (7.1), (8.1) and the fibula broken ends of fractured bone supporting slice that can insert in the fibula broken ends of fractured bone pulp cavity, is provided with the short movable connection structure of scalable rod height on the excellent body of this support stick and described contiguous block;

2, artificial fibula as claimed in claim 1, it is characterized in that: described movable connection structure by be located at rod on one's body a plurality of radially boss of arranging of axially spaced-apart and excellent body via hole and the excellent body that is located on the contiguous block radially constitute in snap ring (12), (13), described support stick by excellent body radially the fastening of snap ring (12), (13) be fixed on the contiguous block (9).

3, artificial fibula as claimed in claim 2 is characterized in that: described rod a plurality of boss on one's body are coniform boss (7.4), (8.4).

4, as claim 1 or 2 or 3 described artificial fibulas, it is characterized in that: described supporting slice is located at rod by one, and the little egative film (7.2) of end and one are enclosed within on the pricker pin big ring plate (10) formation on one's body.