Sei 17-4 Stainless Steel iri Sarudzo Yakanakisisa Yekushandisa Mabhureki EOrthodontic?

Nhanganyaya

Mabhureki eOrthodontic anofanira kubata zviyero chaizvo uku achigara achitsenga, achigona kudzika waya, uye achigara achigadzirisa zvinhu kwenguva refu, saka sarudzo yezvinhu inokanganisa mashandiro uye kuvimbika. Pakati pema alloys aripo, simbi isina tsvina inoomarara ye17-4 precipitation-hardening inoonekwa nekuti inobatanidza simba rakawanda nekudzivirira ngura kwakasimba uye kugona kwayo kugadzira zvinhu nemazvo. Hunhu uhwu hunobatsira mabhureki kudzivirira kushanduka, kuchengetedza giraidhi yeslot, uye kuchengetedza kuratidzwa kwakasimba kwe torque yakavakirwa mukati uye kufamba kwezino. Kunzwisisa kuti sei alloy iyi ichishanda zvakanaka kudaro kunoita kuti vaverengi vaone zvakajeka kuti dhizaini yemabhureki, kunyaradzwa kwemurwere, uye kufanotaura kwekiriniki zvakabatana sei, zvichigadzira zvinhu zvakakosha uye zvakanakira kurapwa zvakaongororwa mune imwe nyaya.

Sei Uchifanira Kusarudza Simbi Isina Kushanda 17-4

Mabhureki eOrthodontic anoshandiswa nesimba rakaomarara panguva yekurapwa, zvichireva kuti zvinhu zvinopa kugadzikana kwakanyanya kwemuchina. Pakati pemhando dzakasiyana dzesimbi dzinoshandiswa mukugadzira orthodontic, simbi isina tsvina ye17-4 precipitation-hardening (PH) yakabuda seyero yeindasitiri. Inozivikanwa nesimbi seType 630, iyi simbi isina tsvina yemartensitic inopa musanganiswa unodiwa wesimba rakakwirira, kuramba ngura kwakanaka, uye kugona kugadzirwa kwakanyatsojeka.

Pakushandisa orthodontic, chinhu chacho chinofanira kutsungirira simba rekucheka uye torque inoenderera mberi inoshandiswa newaya dzemaarchpasina kuchinja purasitiki.17-4 simbi isina nguraInowana simba guru rekugadzira rinodarika 1,170 MPa (170 ksi) kana ikapiswa zvakanaka, zvichiita kuti zviyero zvakakosha zve bracket slot (kazhinji 0.018-inch kana 0.022-inch systems) zvirambe zvakagadzikana mukati menguva yese yekurapwa. Kusimba kwechimiro ichi kunobvumira vagadziri kugadzira mabracket asina kunyatsojeka uye akasununguka pasina kukanganisa kunaka kwemuchina kunodiwa kuti mazino afambe zvakanaka.

Mabhenefiti ekuvimbika kwekiriniki

Kuvimbika kwekiriniki mukurapa mazino kunoenderana nekuratidzwa kwe torque (kazhinji kubva pa -7° kusvika +22°), muromo, uye kufamba-famba kwakavakirwa mubracket prescription. Kana bracket slot ikachinja pasi pemutoro wewaya inorema ye rectangular arch, kufamba kwezino kwakanyorwa kunokanganiswa, zvichikonzera nguva refu yekurapwa uye mhedzisiro isingatarisirwi. 17-4 stainless steel inodzivirira kuchinja uku kweslot, zvichibvumira vagadziri kuchengetedza kushivirira kwakasimba - kazhinji kwakasimba se +/- 0.001 inches - izvo zvinoshandura mhedzisiro yekiriniki inogona kufungidzirwa.

Uyezve, kuomarara kwechinhu ichi kunoderedza njodzi yekutyoka kwemapapiro panguva yekusunga kana varwere pavanoruma chikafu chakaoma netsaona. Nekuderedza zvakanyanya kushanya kwekukurumidza uye mwero wekutadza kushanda zvakanaka kwesimbi, 17-4 stainless steel inopa vashandi chishandiso chakavimbika chinotsigira simba re biomechanical risingazununguki kubva pakutanga kusvika pakugadzirisa kwekupedzisira.

Chikonzero nei ichipfuura simbi isingasvibi yakajairika

Simbi dzisingatsvi dzinowanzo shandiswa, dzakadai se304, 316L, kana kuti 18-8 alloys, dzinoshandiswa zvakanyanya muzvishandiso zvekurapa asi hadzishandiswe zvakanyanya mukushandiswa kwe orthodontics. Dambudziko guru resimbi dzisingatsvi dzinowanzo shandiswa mu300-series nderekuti hadzigoni kuomeswa nekupisa; dzinongovimba chete nekushanda muchando kuti dziwane simba rakakwirira, izvo kazhinji hazvikwani kune zvikamu zvidiki.

Kusiyana neizvi, simbi isingatsvi simbi 17-4 inoomeswa nemvura inova nechimiro chemartensitic chakanatswa zvikuru. Kuchinja uku kwesimbi kunobvumira 17-4 kusvika padanho rekuoma kusvika ku44 HRC (Rockwell Hardness Scale C), zvichipfuura zvakanyanya 20-25 HRC yakajairika ye316L yakanyungudutswa (iyo inowanzo bereka 170-310 MPa chete). Nekuda kweizvozvo, 17-4 inopa hunhu hwakanaka, zvichibvumira kugadzirwa kwemabracket madiki, anoyevedza apo ma alloys akajairika anogona kuburitsa kana kudonha pasi pemitoro yekiriniki.

Zvimiro Zvikuru zveSimbi Isina Zvisimbiso 17-4

Kushanda kwakanaka kwesimbi isingatsvedzeri ye17-4 mu orthodontics kunokonzerwa zvakananga nekuumbwa kwayo kwesimbi uye kupindura kwayo pakushandiswa kwekupisa. Chiumbwa ichi chinowanzova ne15.0% kusvika 17.5% chromium, 3.0% kusvika 5.0% nickel, uye 3.0% kusvika 5.0% copper, pamwe chete nehuwandu hushoma hwe columbium (niobium) ne tantalum. Musanganiswa uyu chaiwo unogadzira chinhu chinoenzanisa kusimba kwesimbi dze martensitic nekutsungirira kwezvakatipoteredza kwe austenitic grades.

Kunzwisisa hunhu uhwu kwakakosha kune Vagadziri veMidziyo Yepakutanga (OEMs) pamwe chete nevanachiremba, sezvo vachingotaura mashandiro anoita bracket mumuromo asiwo kuti inogadzirwa sei, inopedzwa sei, uye inocheneswa sei.

Simba, kuomarara, uye kuramba kupfeka

Hunhu hwesimbi isingatsvi 17-4 hunogona kugadziriswa kuburikidza nekupisa kwakananga. Mumamiriro ezvinhu eH900 (anosvika 482°C / 900°F kweawa imwe chete), chinhu ichi chinosimba zvakanyanya kusvika 1,310 MPa (190 ksi). Simba iri rakasimba rakabatana nekuomarara kwakanyanya, izvo zvinoreva kuti chinodzivirira kupfeka zvakanyanya.

Kana tichitarisa maitiro ekugadzira machira, kuramba kupfeka kwakakosha. Sezvo waya dzesimbi dzisina ngura, titanium, kana nickel-titanium dzichitsvedza nepaburi remabracket, kukweshana uye kupfeka kwemuchina zvinogona kuchinja saizi yeburi nekufamba kwenguva. Kuomarara kwakanyanya kwe17-4 kunoderedza kupera uku, zvichidzivirira waya ye arch kuti isasunge kana kucheka buri, nokudaro zvichiita kuti ive nechokwadi chekutimakanika ekutsvedza ane kukweshana kwakadereramukati menguva yekurapwa kwemwedzi 18 kusvika 24.

Kuramba ngura uye kugona kupenya

Nzvimbo inonyungudika inoparadza zvakanyanya, inoratidzwa nekuchinja-chinja kwemazinga epH (kazhinji inodonha pasi pe pH 5.5 mushure mekudya), kushanda kwe enzyme, uye hunyoro hunogara huripo. 15.0% kusvika 17.5% chromium iri mu 17-4 stainless steel inobatsira kuumbwa kwechikamu chakasimba, chisina kusvibiswa che oxide chinodzivirira simbi iri pasi kubva mukuoxidation uye kurwiswa nekuora. Kunyange zvazvo isinganyanyi kugadzikana nengura pane 316L, 17-4 inoshanda zvakanaka mumuromo, ichidzivisa kusviba uye kuora kubva mukudya zvine acidic.

Pamusoro pezvo, huwandu hwesimbi uye chimiro chakafanana che 17-4 zvinoita kuti ikwanise kupukutwa zvakanaka. Vagadziri vanogona kushandisa mass finishing, electropolishing, kana mechanical tumbling kuti vawane surface roughness (Ra) iri pasi pe 0.2 micrometers. Kupedzwa uku kwakafanana negirazi kwakakosha pakuderedza kuunganidzwa kweplaque, kunatsiridza hutsanana hwemurwere, uye kuderedza coefficient of friction against the archwire.

Mitemo yakakodzera uye zvakatsanangurwa

Kuti murwere ave nechokwadi chekuti chigadzirwa chake chakachengeteka uye chinoshanda zvakanaka, simbi isina ngura ye17-4 inoshandiswa mukurapa mazino inofanira kutevedzera mitemo yepasi rose. Chinonyanya kukosha iASTM F899, iyo Standard Specification yeCrought Stainless Steels yeSurgical Instruments, iyo inotsanangura kuumbwa kwemakemikari chaiwo uye zvinodiwa zvemuchina zvegiredhi rekurapa re17-4.

Pamusoro pezvo, vagadziri vanowanzo tarisa ASTM A564 kune zvinodiwa zvesimbi isingatsvi yakaputirwa nekupisa uye yakapedzwa kutonhora. Kutevedzera mitemo iyi kunovimbisa kuti zvinhu zvisina kusvibiswa zvine njodzi (senge sarufa yakawandisa kana phosphorus, yakavharirwa pa0.030% uye 0.040% zvichiteerana) uye ine hunhu hunodiwa kuti ipfuure ISO 10993-5 (cytotoxicity) uye ISO 10993-10 (sensitization) biocompatibility test.

17-4 Simbi Isina Zvisimbiso vs Zvimwe Zvinhu

Kunyange zvazvo simbi isina ngura ye17-4 ichinyanya kukoshachikochekedzo che orthodonticPamusika, inowanzo ongororwa zvichienzaniswa nezvimwe zvinhu zvakaita se316L stainless steel, pure titanium, cobalt-chromium (Co-Cr) alloys, uye polycrystalline alumina (ceramic). Chinhu chimwe nechimwe chine chimiro chakasiyana chehunhu hwemakanika, hunhu hwerunako, uye mitengo yekugadzira.

Kusarudza zvinhu zvakanakisisa kunoda kuyera kushanda kwekiriniki, kunyaradzwa kwemurwere, uye kushanda zvakanaka kwemari. Kuenzanisa zvakananga kunoratidza kuti nei 17-4 ichiramba iriyo nzira yekutanga inoshandiswa pamabhuraketi esimbi emhando yepamusoro.

Zvinodiwa zvekuenzanisa zvinhu zvikuru

Pakuenzanisa zvinhu zve orthodontic, mainjiniya nevanachiremba vanotarisa pakusimba kwekugadzira, kuomarara, friction coefficient, uye biocompatibility. Simba rekugadzira rinotonga kuramba kwebracket kuchinjika, ukuwo kuomarara kunokanganisa kupfeka nekukweshana. Biocompatibility inoongororwa zvichibva pakukwanisa kwechinhu chacho kukonzera allergic reactions, kunyanya kutarisa pakuburitswa kwe nickel.

Zvakanakira mashandiro

Kana ichienzaniswa nesimbi isingatsvedzeri ye316L, 17-4 inopa simba rekugadzira zvinhu zvakapetwa katatu, zvichiita kuti mabhureki madiki (madiki-mapatya) asarambe achigara kwenguva refu. Kana ichienzaniswa netitanium, 17-4 inoratidza kuomarara kwakanyanya, izvo zvinodzivirira matambudziko akakomba ekubatanidza nekucheka tambo dzesimbi dzinowanzobatanidzwa nemabhureki etitanium akapfava.

Uyezve, kunyange hazvo mabhureki eceramic achipa runako rwepamusoro, kuputsika kwawo kwepanyika kunotungamira mukutyoka kwemapapiro ekubatanidza uye maitiro akaoma ekubvisa mabhondi anogona kukuvadza enamel yemazino. 17-4 simbi isingatsvedzeri inodzivirira kutadza uku kwakaipa zvachose, ichipa imwe nzira inopfava asi yakasimba zvikuru iyo inovimbisa kufanotaura kwekiriniki.

Zvinhu zvakakosha zvinochinja

Chinhu chikuru chinobatanidzwa nesimbi isingatsvi 17-4 ndechekuti ine nickel yakawanda. Kunyangwe iri pasi pe316L (ine 10-14% nickel), nickel ye3-5% mu17-4 inogona kukonzera hypersensitivity kune varwere vane chirwere ichi. Ruzivo rweEpidemiological runoratidza kuti vanhu vanosvika 10-15% vane imwe mhando ye nickel allergy.

Kune varwere ava, vanachiremba vemazino vanofanira kutsiva mabhureki 17-4 neaya asina nickel, akadai setitanium chaiyo kana mabhureki eceramic, pasinei nekuti ane michina yakashata. Pamusoro pezvo, mabhureki 17-4 haana kuoneka kwezvishongedzo kwakakosha kwezvishandiso zve clear aligners kana zve ceramic, zvichivaisa sezvishandiso zvechinyakare, zvinoshanda zvakanyanya pane mhinduro dzerunako.

Kufunga Nezvekugadzira uye Kudzora Hunhu

Maitiro akaomarara emabhuraketi emazuva ano e orthodontic—ane ma contours akabatanidzwa, ma angulations akanyatsojeka e torque-in-base, uye ma undercuts ekubatanidza—anoita kuti machining echinyakare e subtractive machine asashande zvakanaka. Nekuda kweizvozvo, indasitiri iyi yave kushandisa zvakanyanya.Kuumbwa Kwesimbi Nejekiseni (MIM)senzira yakajairika yekugadzira mabhureki esimbi isina ngura 17-4.

MIM inosanganisa kuchinjika kwekugadzirwa kwepurasitiki inopinza nekusimba kwechimiro chesimbi yakagadzirwa, asi inoda mitemo yakasimba yekudzora mhando kuti ive nechokwadi chekuti chigadzirwa chekupedzisira chinosangana nezvinodiwa zvehutano.

Kugadzira uye nzira dzekurapa kupisa

Maitiro eMIM anotanga nekusanganisa upfu hwesimbi isina tsvina hwakatsetseka hwe17-4 nechinhu chinosunga thermoplastic kuti pave nechinosunga midziyo. Chinosunga midziyo chinoiswa muzviumbwa zvakagadzirwa kuti chigadzire 'chikamu chegirini' chakakura ne15-20% kupfuura bracket yekupedzisira. Chinosunga midziyo chinozobviswa nemakemikari kana nekupisa, zvichigadzira 'chikamu chebrown', icho chinozopiswa muvacuum inodziya zvakanyanya kana hydrogen furnace pa1,300°C.

Panguva yekusvira, bracket inodzikira kusvika pahukuru hwayo hwekupedzisira, zvichiita kuti huwandu hwayo hupfuure 97% yezvinhu zvakarukwa (kazhinji >7.5 g/cm³). Mushure mekusvira, bracket dzinoomarara. Kurapa kwakajairika kwe orthodontics iCondition H900, uko zvikamu zvinodziiswa kusvika 482°C kweawa imwe chete uye zvinotonhodzwa nemhepo, zvichiita kuti simba razvo riwedzere uye kuomarara kwekushandiswa mukiriniki.

Kuongorora, kuteverwa, uye kutevedzera mitemo

Nekuti zviyero zvemabhureki zvinodzora kufamba kwezino zvakananga, kuongororwa kwezvikamu chikamu chakakosha chekudzora mhando. Vagadziri vanoshandisa michina yeOptical Coordinate Measuring Machines (CMMs) inokwanisa kuona upamhi hwemaburi nekudzika kwawo nekururama kusvika kuma microns maviri. Mutemo weindasitiri unoda kuti zvisave nemhedzisiro iri pasi pe0.1% (<1,000 PPM) kana maburi akakundikana.

Kutevedza zvinodiwa nemitemo yemidziyo yekurapa yakaita sekutiISO 13485 uye FDA 21 CFR Chikamu 820. Batch yega yega yeMIM 17-4 brackets inofanira kuteverwa kudzokera kune huwandu hwakatarwa hwehupfu hwesimbi isina kubikwa. Magwaro ekutevedzera mitemo anosanganisira mishumo yekuongorora zvinhu (MTRs) inosimbisa kuumbwa kwemakemikari, matanda echoto anopiswa, uye kuongororwa kwehuwandu hwemaawa mushure mekupiswa, izvo zvinofanirwa kugara zvichisimbisa huwandu hwekupedzisira hunopfuura 7.5 g/cm³.

Matanho ekukodzera mutengesi

Kune maOEM anowana mabhureki 17-4 kubva kuvagadziri vezvibvumirano, hunhu hwakasimba hwemutengesi hwakakosha. Danho rekutanga rinosanganisira kuongorora kugona kwemutengesi weMIM, kunyanya kuongorora kunyatsorongeka kwematurusi avo uye kudzora vira rekupisira, sezvo shanduko yekupisa kunyangwe 10°C panguva yekupisira inogona kukonzera kukanganiswa kwehukuru kusingagamuchirwi.

Vatengi vanofanirawo kusimbisa kugona kwemutengesi mushure mekugadzirisa. Izvi zvinosanganisira kuongorora maitiro avo ekudonha, kupukuta nemagetsi, uye kupfavisa kuti vave nechokwadi chekuti mabhureki anosangana neRa < 0.2 µm surface finish inodiwa. Chekupedzisira, mutengesi anofanira kupa vimbiso yechitatu-bato kuti zvikamu zvavo zve17-4 zvakapedzwa zvinopasa ISO 10993-5 cytotoxicity uye sensitization testing, zvichisimbisa kuti ma residual MIM binders akabviswa zvachose.

Nhungamiro yeMutengo neSarudzo

Kutenga mabhureki esimbi isina tsvina ane 17-4 kunoda kunzwisisa zvinokonzeresa mari inoshandiswa muMIM uye kukosha kwenguva refu kwezvigadzirwa. Kunyange zvazvo zvimwe zvinhu zvingapa mitengo yakaderera yezvinhu zvakagadziriswa kana mabhenefiti ekunaka, 17-4 inomiririra chiyero chakanaka chekugadzirwa, kugara kwenguva refu, uye hupfumi hweyuniti.

Kune vanogovera mazino, OEMs, uye vatengi vekiriniki, kufamba nehurongwa hwezvinhu izvi zvinoreva kuongorora mari yekushandisa pakutanga uchienzanisa nemari yakawanda inochengetwa mukugadzira.

Mutengo uchienzaniswa nemutengo wenguva refu

Mutengo wezvinhu zvekugadzira 17-4 MIM feedstock unowanzova pakati pemadhora gumi nemashanu kusvika makumi maviri nemashanu pakirogiramu. Zvichienderana nekuti bracket imwe chete ye orthodontic inorema chidimbu chegiramu (kazhinji 0.1 kusvika 0.3 gramu), mutengo wezvinhu zvekugadzira payuniti imwe hauna kunyanya kukosha. Zvinonyanya kukosha ndezvekushandisa majekiseni ekugadzira, nzira yekupisa inodya simba rakawanda, uye kugadziriswa kwakanyatsonaka kunodiwa pakugadzirisa kurapa.

Zvisinei, kukosha kwekiriniki kunowanikwa nemabhureki 17-4 kunodarika zvikuru mari yavanotenga.

Zvinhu Zvinokosha Zvaunofanira Kuziva

• Mhedziso dzakakosha uye chikonzero chekuti Nei 17-4 Stainless Steel iri Sarudzo Yakanakisisa Yezvinhu Zvekushandisa Pakushongedza Mabhureki EOrthodontic?
• Magadzirirwo, kutevedzera mitemo, uye kuongororwa kwenjodzi zvinofanirwa kuongororwa usati waita chibvumirano
• Matanho anotevera anoshanda uye mazano anogona kushandiswa nevaverengi ipapo ipapo

Mibvunzo Inowanzo bvunzwa

Sei simbi isina ngura ye17-4 ichinyanya kufarirwa pamabhuraketi e orthodontic?

Inopa simba rakasimba, kuomarara kunorapika, uye kuramba ngura, zvichibatsira kuti nzvimbo dzinoiswa mubhureki dzirambe dzakaita sedzakanaka uye kuti mazino afambe zvakanaka.

Simbi isina ngura ye17-4 inoenzaniswa sei ne304 kana 316L yemabhureki?

17-4 inogona kuomarara kana mvura yanaya, saka yakasimba uye inodzivirira kupera simba kupfuura simbi dzisingatsvedzeri dzinoshandiswa muzvinhu zvinoderedza kushushikana.

Ndeipi bhenefiti yekiriniki inobva mukugadzikana kuri nani kwe slot?

Zviyero zveslot zvakagadzikana zvinovandudza kuratidzwa kwe torque, zvinoderedza kushanduka kwesimba newaya dze rectangular, uye zvinobatsira kupfupisa kunonoka kunokonzerwa nekushanda kwebracket kusingaenderane.

Simbi isina ngura ye 17-4 inobatsira here kuderedza kuputsika kwebhureki?

Ehe. Kuomarara kwayo uye kuomarara kwayo zvinoderedza njodzi yekutyoka kwemapapiro etambo uye kupera, izvo zvinogona kuderedza kushanya kwekukurumidzira panguva yekurapwa.

Ko Denrotary ine mabhureki esimbi isina ngura 17-4 here?

Ehe. Denrotary ine mabhureki esimbi isina ngura eMIM 17-4 uye inogadzira zvigadzirwa zve orthodontic pasi peCE, FDA, uye ISO13485 quality systems.