1.5 self drilling screw

Ultra low profile plates chamfered edges uye yakafara plate profiles zvinopa zvisingaite palpability. Inowanikwa mune zvakawanda zvakagadziridzwa kureba.

Zvakanakira titanium alloy screws:

1. Simba guru. Density yetitanium i4.51g/cm³, yakakwira kupfuura iya yealuminium uye yakaderera pane iya yesimbi, mhangura uye nickel, asi kusimba kwacho kwakakwira zvakanyanya kudarika mamwe masimbi. Sirasi yakagadzirwa netitanium alloy yakareruka uye yakasimba.
2. Good corrosion resistance, titanium uye titanium alloy mumidhiya yakawanda yakanyatsogadzikana, titanium alloy screws inogona kuiswa kune zvakasiyana-siyana zviri nyore kuparara.
3. Good heat resistance and low temperature resistance.Titanium alloy screws inogona kushanda pakupisa kusvika 600 ° C uye minus 250 ° C, uye inogona kuchengetedza chimiro chavo pasina kuchinja.
4. Non-magnetic, non-chepfu.Titanium isimbi isina magineti uye haizove nemagineti munzvimbo dzakakwirira kwazvo dzemagineti.Kwete chete isiri-chepfu, uye ine kuenderana kwakanaka nemuviri wemunhu.
5. Yakasimba anti-damping performance.Inofananidzwa nesimbi nemhangura, titanium ine nguva yakareba yekudengenyeka kwekudengenyeka mushure mekugadzirwa kwemagetsi uye kudengenyeka kwemagetsi.Kuita uku kunogona kushandiswa sekugadzirisa maforogo, kudengenyeka kwezvikamu zvemishonga ye ultrasonic grinders uye mafirimu ekudengenyeka kwezvitauriri zvepamusoro.

Thread dhizaini yekumhanyisa screw kutanga uye yakaderera yekuisa torque. Kusarudzwa kwakakura kwemahwendefa uye mesh, kusanganisira mastoid uye temporal meshes, uye burr hole zvivharo zveshunts.

Kana iyo sikuruu yasimba, zviri nani?

Zvisungo zvinowanzoshandiswa pakuvhiyiwa kwemapfupa kumanikidzira nzvimbo yekuputsika, kugadzirisa ndiro kune pfupa, uye kugadzirisa pfupa kune mukati kana kunze kwekugadzirisa furemu.Kumanikidzwa kunoshandiswa kusvina screw mufupa kunofananidzwa ne torque inoshandiswa nechiremba anovhiya.

Zvisinei, sezvo simba re torque rinowedzera, screw inowana simba guru re torque (Tmax), panguva iyo simba rekubata re screw pabhonzo rinoderedzwa uye rinobudiswa kunze kwechinhambwe chiduku.Kudhonza-kunze simba (POS) ndiko kusungirirwa kwekumonyanisa sikuru kunze kwebhonzo. Inowanzoshandiswa separameter kuyera simba rekubata re screw.Parizvino, hukama huri pakati pe torque yakawanda uye simba rekudhonza-kunze hahusati hwazivikanwa.

Mumakiriniki, vanachiremba vemapfupa vanowanzoisa sikuruu neinenge 86% Tmax.Zvisinei, Cleek et al. vakawana kuti 70% Tmax screw kupinza patibia yehwai inogona kuwana iyo yakanyanya POS, zvichiratidza kuti yakawandisa torsion simba inogona kushandiswa kukiriniki, izvo zvinoderedza kugadzikana kwekugadzirisa.

Ongororo ichangobva kuitika yehumerus muvanhu cadavers naTankard et al. akawana kuti iyo yakawanda yePOS yakawanikwa pa 50% Tmax. Zvikonzero zvikuru zvekusiyana kwemigumisiro iri pamusoro apa inogona kunge isinganzwisisiki yezvienzaniso zvinoshandiswa uye zviyero zvakasiyana-siyana zvekuyera.

Naizvozvo, Kyle M. Rose et al. kubva kuUnited States yakayera hukama pakati peTmax yakasiyana nePOS nemascrews akaiswa mutibia ye cadavers yevanhu, uye akaongororawo hukama huri pakati peTmax neBMD uye cortical bone thickness. yakakura zvakanyanya kupfuura iyo ye100% Tmax. Pakanga pasina misiyano muBMD uye cortical thickness pakati pemapoka etibia, uye pakanga pasina kuwirirana pakati peTmax nepamusoro pezviviri zviri pamusoro.Saka, muhutano hwehutano, chiremba anovhiya haafaniri kuomesa screw nehukuru hwehutu hwehutu, asi neine torque zvishoma zvishoma kudarika Tmax. Kunyangwe 70% uye 90% Tmax ichigona kuwana yakafanana POS, pachine zvimwe zvakanakira kuwedzeredza screw, asi torque haifanire kudarika 90%, zvikasadaro kugadzirisa kwekugadzirisa kuchakanganiswa.

Kwakabva: Hukama huri pakati peInsertional Torque uye Pullout Strength of Surgical Screws.Techniques in Orthopedics: June 2016 - Volume 31 - Issue 2 - p 137–139.