| 摘要 |
FIELD: surgical instruments used in orthopedics and traumatology, in particular, for open setting of displaced cervical vertebrae of spine. ^ SUBSTANCE: apparatus has spring-loaded branches connected with one another through pivotal lock with shaft and mating opening. Arms and working jaws are provided on branches. One of working jaws is equipped with adjustment retainer provided on first outer supporting surface and other working jaw has pusher adapted for cooperation with displaced vertebral body and disposed on second outer supporting surface. Opening mating with said shaft is made in the form of guiding slot oriented at an angle to plane where working jaws adjoin one another. Length and angle of inclination of guiding slot correspond to maximal height of lift of vertebral body of joint having maximal size. Pusher for cooperation with displaced vertebral body is made in the form of step. Branches are loaded by means of spring formed as branch shifting means which are provided with angular bend for preliminary passage of branches before deformation of spring. Apparatus of such construction ensures injure-free setting of displaced vertebra by one hand for minimal time. ^ EFFECT: simplified construction, provision for trauma-free cooperation of instruments with vertebral body, convenient use and reduced time for performing setting of displaced vertebra body. ^ 5 cl, 7 dwg |
