Non-Locking Screw System

Tsanangudzo Pfupi

Locking Screw inogona kushandiswa pamwe chete neplate yekukiya kuti uwane mhedzisiro yekugadzirisa kuputsika.Yakanga yakagadzirirwa kupa vavhiyi uye varwere vane implant yakanyatsokwana.Kudyara kunokwana kunogona kubatsira kuderedza paOR-nguva nekudzikisa kudiwa kwekupeta ndiro, uye inogona kubatsira kuderedza kutsemuka kusarongeka uye kusimba kwetishu dzakapfava.

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Yakagadzirwa neTC4 zvinhu.
Mhando dzemasiruuru iHA cortical bone screw, HB cancellous bone screw uye HC locking screw.HB screws inowanikwa mune yakazara shinda uye hafu shinda.
Masikiri ehukuru hwakasiyana ane midziyo yekuvhiya inoenderana.
Saizi dzeHA: Φ2.0, Φ2.5,Φ2.7, Φ3.5, Φ4,5
Kukura kweHB;Φ4.0 yakazara, Φ4.0hafu, Φ6.5 yakazara, Φ6.5hafu

Mazano Okurapa

Standard cortical screws inoshandiswa kune diaphyseal mapfupa, ane symmetrical musoro (3.5 + 4.5) uye asymmetrical shinda.
Standard cancellous bone screws inoshandiswa kune metaphysis kana epiphysis, ine yakakura yekunze dhayamita uye yakadzika shinda.
Lag screw tekinoroji ine zvinhu zviviri zvemuchina: 1 iyo circumferential force (friction force) padhuze neshinda, 2 iyo axial force pakusunga, screw screw kana buri rekutsvedza rinobvumira contralateral fracture block kuti idhonzwe yakananga kuscrew head.

Classification of screws

Standard cortical screw, ye diaphyseal bone, symmetrical musoro, asymmetrical shinda.
Standard cancellous bone screw, inoshandiswa metaphysis kana epiphysis, yakakura yekunze dhayamita, yakadzika shinda.

Mamwe masiruuru akakosha
1. Dry screw, kukweshana kudiki pakati pebhonzo nendiro
2.Locking screw, musoro uye ndiro yekukiya (fixed angle)
3. Schanz screw, inoshandiswa kune yekunze fixation bracket