1.5 tus kheej drilling ntsia hlau

Ultra low profile phaj chamfered npoo thiab dav phaj profile muab zoo tsis muaj palpability.Muaj nyob rau hauv ntau customized ntev.

Qhov zoo ntawm titanium alloy screws:

1. Lub zog muaj zog.Qhov ceev ntawm titanium yog 4.51g / cm³, siab dua li ntawm txhuas thiab qis dua cov hlau, tooj liab thiab npib tsib xee, tab sis lub zog ntau dua li ntawm lwm cov hlau.Ntsia hlau ua los ntawm titanium alloy yog lub teeb thiab muaj zog.
2. Zoo corrosion kuj, titanium thiab titanium alloy nyob rau hauv ntau yam xov xwm yog heev ruaj khov, titanium alloy screws yuav siv tau rau ntau yam yooj yim corrosive ib puag ncig.
3. Cov cua kub zoo thiab tsis kub tsis kam.Titanium alloy screws tuaj yeem ua haujlwm ntawm qhov kub txog li 600 ° C thiab rho tawm 250 ° C, thiab tuaj yeem tswj lawv cov duab yam tsis hloov.
4. Tsis yog-magnetic, tsis muaj tshuaj lom.Titanium yog cov hlau tsis sib nqus thiab yuav tsis muaj hlau nplaum hauv cov hlau nplaum loj heev.Tsis tsuas yog tsis muaj tshuaj lom, thiab muaj kev sib raug zoo nrog tib neeg lub cev.
5. Muaj zog tiv thaiv damping kev ua tau zoo.Piv nrog hlau thiab tooj liab, titanium muaj lub sij hawm ntev tshaj kev co attenuation tom qab txhua yam kev co thiab hluav taws xob kev co.Qhov kev ua tau zoo no tuaj yeem siv los ua cov diav rawg, kev co ntawm kev kho mob ultrasonic grinders thiab vibration films ntawm cov suab nrov nrov. .

Xov tsim rau ceev ceev ntsia hlau pib thiab tsis tshua muaj ntxig torque.Kev xaiv dav ntawm daim phiaj thiab mesh, nrog rau mastoid thiab lub cev meshes, thiab burr qhov npog rau shunts.

Lub tighter lub hau, qhov zoo dua?

Screws yog siv tau nyob rau hauv Orthopedic phais kom haum lub pob txha pob txha, thiab kho cov pob txha mus rau cov ntsia hlau rau hauv cov pob txha yog ib qho sib xws rau lub torque ua rau lub kws phais.

Txawm li cas los xij, raws li lub zog torque nce, cov ntsia hlau tau txais qhov siab tshaj plaws torque quab yuam (Tmax), qhov taw tes ntawm cov ntsia hlau tuav lub zog ntawm cov pob txha raug txo thiab nws tau rub tawm me me nyob deb.Pull-out force (POS) yog qhov nro. kom twist lub hau tawm ntawm cov pob txha.Nws feem ntau yog siv los ntsuas qhov ntsuas lub zog ntawm cov ntsia hlau.Tam sim no, kev sib raug zoo ntawm qhov siab tshaj plaws torque thiab lub zog rub tawm tseem tsis tau paub.

Clinically, orthopedic kws phais feem ntau ntxig cov ntsia hlau nrog txog 86% Tmax.Txawm li cas los xij, Cleek li al.pom tias 70% Tmax ntsia hlau ntxig rau ntawm tibia ntawm cov yaj tuaj yeem ua tiav qhov siab tshaj plaws POS, qhia tias lub zog torsion ntau dhau yuav raug siv rau kev kho mob, uas yuav txo qhov kev ruaj ntseg ntawm kev kho.

Kev tshawb fawb tsis ntev los no ntawm humerus hauv tib neeg cadavers los ntawm Tankard li al.pom tias qhov siab tshaj plaws POS tau txais ntawm 50% Tmax.Qhov tseem ceeb ntawm qhov sib txawv ntawm cov txiaj ntsig saum toj no yuav yog qhov tsis sib xws ntawm cov qauv siv thiab cov qauv ntsuas sib txawv.

Yog li ntawd, Kyle M. Rose et al.los ntawm Tebchaws Meskas tau ntsuas kev sib raug zoo ntawm Tmax thiab POS sib txawv los ntawm cov ntsia hlau ntxig rau hauv tibia ntawm tib neeg cadavers, thiab kuj tau txheeb xyuas qhov kev sib raug zoo ntawm Tmax thiab BMD thiab cov pob txha cortical thickness.Cov ntawv tsis ntev los no tau luam tawm hauv Cov Txheej Txheem hauv Orthopaedics.Cov txiaj ntsig tau qhia tias Qhov siab tshaj plaws thiab zoo sib xws POS tuaj yeem tau txais ntawm 70% thiab 90% Tmax nrog cov ntsia hlau torque, thiab POS ntawm 90% Tmax ntsia hlau torque yog qhov ntau dua li ntawm 100% Tmax.Tsis muaj qhov sib txawv ntawm BMD thiab cortical thickness ntawm tibia pawg, thiab tsis muaj kev sib raug zoo ntawm Tmax thiab ob qho tib si saum toj no.Yog li ntawd, nyob rau hauv kev kho mob, tus kws phais yuav tsum tsis txhob zawm cov ntsia hlau nrog lub siab tshaj plaws torsion quab yuam, tab sis nrog ib tug torque me ntsis. tsawg dua Tmax.Txawm hais tias 70% thiab 90% Tmax tuaj yeem ua tiav POS zoo sib xws, tseem muaj qee qhov zoo rau overtightening cov ntsia hlau, tab sis lub torque yuav tsum tsis pub tshaj 90%, txwv tsis pub cov nyhuv fixation yuav raug cuam tshuam.

Tau qhov twg los: Qhov Kev Sib Raug Zoo Ntawm Insertional Torque thiab Pullout Strength of Surgical Screws.Techniques in Orthopaedics: June 2016 - Volume 31 - Issue 2 - p 137–139.