Izikrufu ze-Pedicle, iintonga kunye nezixhobo zokutshixa zenza i-posterior fixation construction ekwazi ukuzinzisa amacandelo omqolo okhethiweyo ngelixa i-fusion ikhula. Ukhetho lwenkqubo kufuneka lusekelwe kwi-anatomy ephathwayo, ukusetyenziswa okujoliswe kuyo, isicwangciso sokwakha, umgangatho wamathambo, izixhobo ezihambelanayo kunye namaxwebhu emveliso ethe ngqo kwimarike.