CN201920890U - Long-hook bolt with tail nut for bone operation - Google Patents

Abstract

The utility model discloses a long-hook bolt with a tail nut for the bone operation, which comprises a plastic wrap with a cylindrical cavity, wherein a titanium bolt is arranged in the plastic wrap; the front end of the titanium bolt is provided with a memory alloy hook; and the tail end of the titanium bolt is provided with a nut and a spacer. The long-hook bolt with a tail nut for the bone operation has the advantage of simple structure and is easy to manufacture. One end is the memory alloy hook, the memory alloy hook becomes soft after being dipped in cold water and can be shaped, so that the surgery operation is easy and simple, and injury can be effectively reduced. In addition, little time is consumed, the whole bone and broken bones can be well fixed by the long-hook bolt without external fixing, and thus the difficult problem for clinic doctors in the field for years can be well solved.

Description

A kind of bone surgery is with the long hook screw of tail cap

Technical field

This utility model belongs to technical field of medical instruments, relates to the screw of a kind of bone surgery with the long hook of tail cap.

Background technology

The method of traditional fixedly front and back ligamentaum cruciatum tibia attachment point avulsion fracture has open reduction internal fixation, silk thread and fixation with steel wire and multiple screws.No matter which kind of fixing means all need be cut the long wound of an about 20cm, and is big to joint and ligament injury, length consuming time, having a big risk of infection, fixing unreliable, external fixation to be assisted after intact, and ankylosis and dysfunction can be caused, have a strong impact on patient's life.

Since 20 worlds since the eighties, it is little to have wound, and cicatrix is little and recover the application of the fast arthroscopic techniques that is celebrated in the field, joint, increasing doctor attempt by arthroscope fixing down before and after ligamentaum cruciatum avulsion bone piece.Nineteen eighty-two, Mclennan reported first arthroscope is treatment front and back ligamentaum cruciatum tibia attachment point avulsion fracture down, Chinese scholars has been carried out many-sided research and discussion, it is little to think that the joint arthroscopic diagnosis has wound, and after-operation response is light, recovers fast, the characteristics that functional rehabilitation is good, the degree of impairment of each structure of intraarticular can be accurately understood in joint arthroscopic diagnosis simultaneously, handles IA merging damage simultaneously, therefore becomes first-selected Therapeutic Method.

Tibial insertion of posterior cruciate ligament avulsion fracture before Martinez etc. sew up under arthroscope, tibia stop adopt screw to fix.The king builds congruence and uses shoulder joint puncture stiching instrument that 2 No. 5 Ethi bond lines are passed bone piece and ligament under arthroscope, by 2 tibial bone roads 2 sutures is drawn to reach tibia the place ahead, by the fixing avulsion bone piece of suture.But they all bore 2 tibial bone roads, and this just requires will to keep between 2 tibial bone roads distance more than 1 centimetre could guarantee the success of performing the operation, and has increased the operation technique difficulty.Pair approaches reset under assisting in after under the employing arthroscopes such as Kim, outside the back, diameter is used hollow screw greater than the 20mm sclerite and is fixed, the isolated bone piece of diameter between 10mm ~ 20mm used Kirschner wire and fixed, and diameter adopts less than the comminuted fracture piece of 10mm can not absorb suture or tinsel is fixed.Domestic Di Zhenglin etc. is reported in uses the acute or chronic ligamentaum cruciatum tibia of nonabsorbable suture fixation for treatment stop avulsion fracture under the arthroscope, obtain good clinical effectiveness.But these methods all need to carry out complicated operation, specification requirement height under arthroscope is auxiliary.The fixing methods such as suture, steel wire, screw that adopt mostly of ligamentaum cruciatum tibia attachment point avulsion fracture before and after simultaneously under the knee joint mirror, suture is prone to fracture in by osseous tunnel and knotting process and the tension degree is limited, the shortcoming of undercapacity, and screw is fixed the situation that sclerite is bigger that then only is applicable to; Steel wire can't effectively be fixed for comminuted fracture, rotation displacement fracture, if fixedly steel wire is forward for the single fracture piece, might get loose after the activity, then sclerite leading edge possibility perk after leaning on, fixation with steel wire simultaneously easily causes stress concentration, fatigue fracture, and internal fixation lost efficacy.

Littlejohn etc. pass through fixedly posterior cruciate ligament avulsion bone piece of 3 pieces of hollow screws, but the method complicated operation needs the additional approach of proceeds posterolateral outside, is difficult for grasping.Wang Bingang etc. adopt the preceding tibial insertion of posterior cruciate ligament avulsion fracture of percutaneous hollow screw internal fixation treatment, operation wound is little, definite effect, post-operative recovery are good, but the method only is applicable to avulsion bone piece the greater, if the less or local comminuted fracture of avulsion bone piece then is not suitable for this method.All above-mentioned operation methods all need auxiliary 6 weeks of external fixation, easily cause joint stiffness.

Summary of the invention

The purpose of this utility model provides a kind of bone surgery with the long hook screw of tail cap, have simple in structure, easy to manufacture, operation easily, reduce damage and fixing reliable advantage.

The technical scheme that this utility model adopted is, a kind of bone surgery comprises the plastic wrapper of cylindrical cavity with the long hook screw of tail cap, is provided with the titanium screw-making in the plastic wrapper, the front end of titanium screw-making is provided with the memorial alloy hook, and titanium screw-making end is provided with nut and pad.

Feature of the present utility model also is,

The memorial alloy hook is provided with 3.

Bone surgery of the present utility model is with the long hook screw of tail cap, simple in structure, easy to manufacture, an end is the memorial alloy hook, with deliquescing behind the frozen water immersion memorial alloy hook, shaping, operation technique is easy, easy, effectively reduces damage, and it is consuming time few, no matter all can reach fine fixing to monoblock and pulverizing bone piece, do not need external fixation, well solved the difficult problem of orthopaedics clinician in this field for many years.

Description of drawings

Fig. 1 is the structural representation of this utility model bone surgery with the long hook screw of tail cap.

Fig. 2 is the user mode figure of this utility model bone surgery with the long hook screw of tail cap.

Among the figure, 1. plastic wrapper, 2. titanium screw-making, 3. memorial alloy hook, 4. pad, 5. nut.

The specific embodiment

Below in conjunction with the drawings and specific embodiments this utility model is elaborated.

This utility model bone surgery is with the structure of the long hook screw of tail cap, as shown in Figure 1, be provided with titanium screw-making 2 in the plastic wrapper 1, the front end of titanium screw-making 2 is equipped with memorial alloy hook 3, memorial alloy hook 3 is provided with more than 2 or 2, and the end of titanium screw-making 2 is provided with nut 5 and pad 4.

This utility model bone surgery is with the long hook screw of tail cap, user mode as shown in Figure 2, wherein memorial alloy hook 3 usefulness frozen water soak the back deliquescing, shaping, with titanium screw-making 2 by behind the osseous tunnel, the number of degrees that memorial alloy hook 3 utilizes its plastic type to press the size of bone piece and required fixed direction and required bending with vertebral pulp pincers are moulding, be stuck in the ligament basilar part of Bands bone piece, wait for 30 seconds at normal temperatures, memorial alloy hook 3 will solidify by moulding shape, the other end at titanium screw-making 2 is inserted in pad 4 earlier, screw in nut 5 and make it to be close to pad 4 and bone wall, strain titanium screw-making 2 then, make 3 firm the encircling of memorial alloy hook block the fixed broken bone piece of wanting, thereby reach the purpose of bone fixation piece.

Claims (2)

1. a bone surgery is with the long hook screw of tail cap, it is characterized in that: the plastic wrapper (1) that comprises cylindrical cavity, be provided with titanium screw-making (2) in the described plastic wrapper (1), the front end of described titanium screw-making (2) is provided with memorial alloy hook (3), and described titanium screw-making (2) end is provided with nut (5) and pad (4).

2. bone surgery according to claim 1 is characterized in that with the long hook screw of tail cap described memorial alloy hook (3) is provided with 3.

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