Non-Locking Screw System
Zamalonda Tsatanetsatane
Zimapangidwa ndi zinthu za TC4.
Mitundu ya zomangira ndi HA cortical bone screw, HB cancellous bone screw ndi HC locking screw.Zomangira za HB zimapezeka mu ulusi wathunthu ndi ulusi watheka.
Zomangira zamitundu yosiyanasiyana zimakhala ndi zida zopangira opaleshoni.
Kukula kwa HA: Φ2.0, Φ2.5,Φ2.7, Φ3.5, Φ4,5
Kukula kwa HB;Φ4.0zodzaza, Φ4.0hafu, Φ6.5 zonse, Φ6.5theka
Malangizo Achipatala
Zomangira zokhazikika zama cortical zimagwiritsidwa ntchito pamafupa a diaphyseal, okhala ndi mutu wofananira (3.5 + 4.5) ndi ulusi wa asymmetrical.
Zomangira zomangira za mafupa zokhazikika zimagwiritsidwa ntchito ngati metaphysis kapena epiphysis, okhala ndi mainchesi akulu akunja ndi ulusi wakuya.
Ukadaulo wa screw screw uli ndi zigawo ziwiri zamakina: 1 mphamvu yozungulira (mphamvu yogundana) motsatira ulusi, 2 mphamvu ya axial ikamangitsa, screw screw kapena bowo lotsetsereka limalola chipika chophwanyika kuti chikokedwe kumutu wa screw.
Gulu la zomangira
Standard cortical screw, ya diaphyseal fupa, symmetrical mutu, asymmetrical ulusi.
Standard cancellous fupa wononga, ntchito metaphysis kapena epiphysis, lalikulu kunja awiri, ulusi wakuya.
Zomangira zina zapadera
1. Dry screw, kukangana pang'ono pakati pa fupa ndi mbale
2.Locking screw, mutu ndi mbale locking (fixed angle)
3. Schanz screw, yomwe imagwiritsidwa ntchito ngati bulaketi yakunja
2.0HA
2.5HA
2.7 HA
3.5HA
4.0 HB theka
4.0HB yodzaza
4.5HA
6.5HB Yodzaza
6.5HB Theka