Plastic -- serve for health
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Braun company gained the headway that initiates a gender in this one domain -- use plastic capillary replace steeliness spile. Vein spile (" vein takes buy injection " ) be able to come out. After inserting intubate, take out steeliness needle core. Stay in the tube inside patient blood-vessel, won't cause loss because of the activity of upper limbs. So far, such spile has exceeded the whole world portion of 3.4 billion 5 ten million. Be in likewise this one period, glass and metallic injector also are replaced by plastic products place. Be in early 1965, the Colin Murdoch of New Zealand filed the patent of one-time plastic injector. The Manatu Hauora of Ministry of Public Health that does not cross New Zealand cares nothing to its invention. No matter be a doctor,he is informed or the patient does not have interest to one-time plastic injector. And the one-time injector that the whole world uses has exceeded 16 billion -- among them a few is return beforehand fill medicines and chemical reagents. Form if vitreous bulb is before world of find out by asking seemingly casual questions of natural balata safety, ancient time is European the bladder of use goat uses contraceptive. After this, the caecum of sheep, swimming bladder, linen or flannelette bag had acted as this one part. Doctor Condom checks put in order in England 2 worlds (1630-1685) Yang Chang is recommended to serve as contraceptive tool in palace, use nowadays " Condom " this one name out hereat. Nextpage1855 year, charles Goodyear makes an original natural balata safety cover. Although the wall is large 1-2mm, and have fore-and-aft juncture, but this still is the significant breakthrough that brings complete set. After about 50 years, 1901 Julius Fromm breeds immerge of bulb of a glass in peptization fluid, subsequently dry, vulcanization, law of this one party improved those who bring complete set to make a technology thoroughly. Be in about 1919, fromm rolled out the safety that original mechanization produces to cover. And, "Fromm " the wall of the product is large it is only 0.
06 Mm. Dentistry is embedded content is to belong to Ⅱ B exclusively kind product. This kind of product is use at unplugging mandible symphysis prevents after the tooth in dentistry operation. Use get together third hands in ester (PLA, get together lactic acid) duplicate accurately tooth root. Embedded content fills cut, because this will microbial, bacterium and food are residual,prevent outer. Same, also get controlling to the parenchyma that grows inside bone. PLA has live thing but degradation sex, accordingly cut can cicatrization and slow close. The earliest record that surgery of plastic suture material oversews appears in 5, 000 old before. Plastic all over the world before invincible, what suture cut uses is fiber of Gong Xian, plant and catgut. Nevertheless, these material are not asepsis, connect regular meeting to bring about cut to affect. Be in about 1860, joseph Lister and Curt Schimmelbusch development give the earliest sterilization technology, can reduce the amount that cut affects significantly. Searched 1868 but resorbent suture material when, joseph analysed sheep catgut. After use phenol undertakes alexipharmic, made original " feline bowel " . Look be like a name such, but the bowel that never has used felid -- the bowel that uses sheep and goat only. Till the European Union still used this kind of natural data that passes processing 2001. Wallace Hume Carothers applied for polyamide 1935 (PA) patent. From this, PA6 reachs PA6.
The 6 original synthetic suture material that make begin to get applied. Meanwhile, b.
Braun is made piece " Synthofil A " -- he is the earliest use get together to benzene second of 2 formic acid 2 ester (PET) make synthetic suture. What here the domain uses another kind is plastic it is PP. This kind of polyolefin can be made smooth, onefold fiber. 20 centuries 60 time end appeared original can synthesize suture resorbently. 1971 B.
Braun company rolled out You Juyi alcoholic acid to be made but resorbent synthesis material " Dexon " . Below the circumstance of existence having water, use the plastic ability that lactic acid restricts to be absorbed by human body. Airframe is not instantly resorbent, pass PLA however accumulate progressive travel to adjust. Accordingly, do not need to pass operation of unwell making a person to take out the suture stuff inside body subsequently. Articulatory -- laden and lose tired inside inside human body of park of place false system, belong to Ⅲ for the most part kind medical treatment product (dentistry except) . Normally this kind of product calls embedded thing. The major embedded thing that uses nowadays is knee joint and hip joint. Because be in,the greatest pressure bears inside human body, knee appears very easily the circumstance of damage. the angle from medicine, the skeleton in knee joint system, cartilage, muscle and ligament cooperate accurately, ensured strength and flexibility. Skeletal osculatory dot is enclothed have cartilage, make wear away decrease to the smallest. To arthritis, cartilage is worn away completely, because this must replace humanness labour knee joint. Articulatory attaint part by purify, displacement is artificial component. Artificial component is made with the metal normally. Between healthy person skeleton the position of meniscus, insert one plastic wafer. This makes joint wears away decrease to lowest, and make service life is lengthened. The circumstance that did not damage to knee joint itself, it is to replace cartilage only. Accordingly, the cartilage that purify is damaged, a sunken place is ground on skeleton. You Juyi Xi (PE) the refill that makes by park inside sunken place. 1955 " K " exhibit rolled out GUR first this kind of material (manufacturer: Ticona GmbH, germany) . This kind plastic it is PE of quantity of element of a kind of freeboard (UHMW-PE) , because its wearability is mixed,combat impact strength, be used at artificial hip joint and bracket nowadays. Buy of this kind of medical and embedded content enters the support of the material that prop up of hollow organ inside the hollow organ of artery or esophagus and so on, be used at preventing an organ close. This kind of material often also is used within coronal shape blood-vessel. The name of bracket results from dentist Charles Stent of England (1807-1885) , this doctor development goes a kind to be used at shaping of each parts on jaw bone and face thermoplastic material. This kind of material also can be used at supporting hollow apparatus. The headway that plastic domain gains profit from ceaselessly, and the demand of biology degradation respect, plastic a more use are shown in the further development of bracket. These biology but degradation is embedded thing is the most important is, the function propping up that provides for artery depends on only medical treatment requirement. In this on one hand, igaki-Tamai bracket had gained the headway that initiates a gender, this kind of bracket by PLLA (get together Zun Xuan lactic acid) make, can be in a few months degradation is absorbed. The another application domain with artificial heart plastic valve is heart valve. Annual, there are 160 patients to need to have heart valve operation about in every 1 1 million population. However, this occupies the patient that included illness of posteriority heart valve only. In addition, the infant that contracts disease of posteriority heart valve also needs undergo surgery. There is valve of biology of an use man-made in every 3 patients, the valve tailor that this kind of valve is use pig or ox is in PTFE (get together 4 fluorine ethylene) annulus go up and make. The advantage of valve of this kind of biology depends on the natural figure that its have and function. The need after the operation undertakes cruor is treated fighting instantly, precaution produces clot all round heart valve. Additional, the function of valve of this kind of heart is very smooth. The fatigue intensity that blemish depends on this kind of product is still doubtful calm, and the reappearance in production is poorer. The patient of about 67% uses mechanical heart valve, these products are made according to different practical principle. Bulbiform before valve is used as weather strip. The artificial valve nowadays is by fractionize valve of globose valve, promotion, and inclined dish of valve. In addition, still can distribute the kind that is two Xie Hesan leaves. Compare with biology valve photograph, this kind of product is made easily, and service life is longer. Nevertheless, this kind of product when using can produce noise. More important is, exotic of biologic of dispute of this kind of product is qualitative, must prevent haemal clot through cure all the time. The valve of 3 leaves heart that PA12 inject shapes is technology of a kind of innovation, and can mass-produced. In the light of this kind of product already successful design gives a kind to note a pattern new-styly, those who lend this production is three-dimensional into core valve need not rework, and did not note path or top apparently give a mark. Such trace can bring about blood stream to produce eddy, produce clot even. Installation has academic life of more than 100 years at this kind of valve of titanium annulus. Epilogue did not come, plastic the application in domain of medical treatment technology will emerge in endlessly: Polyvinyl chloride (PVC) the container that makes can store surely blood, also can regard one-time collect as uric bag; Serve as in the operation of computer navigation " MRT can be passed through " nerve instrument (photography of layer of magnetism resonance body, Ⅲ kind product) ; Or as complex system, be used at blood sugar to monitor or self-sufficient medicine, for example inhalant. These example make clear, medical treatment technology is the technology related each course height, this makes the treatment method of course across makes indispensable technology. Anyhow, no matter pay how many effort and enthusiasm,be in in technical development, the patient's health and interest just are the most important. CNC Milling CNC Machining