Locking pob txha screws yog ib hom kev phais implants siv los ruaj ntseg pob txha thiab stabilize pob txha. Lawv yog cov yam ntxwv los ntawm lawv tus kheej-tapping tsim thiab xauv mechanism, uas pab tiv thaiv cov ntsia hlau los ntawm kev thim rov qab ntawm cov pob txha.
Hu rau