#$%^&*AU2020100723A420200618.pdf#####ABSTRACT The disclosure discloses an adjusted door opening size-controllable controllable cervical vertebra posterior modeling steel plate, relating to the technical field of medical instruments. 5 The steel plate includes a guide rail, wherein the upper surface of the guide rail is provided with a guide groove, the inside of the guide groove is slideably connected with a rack, and teeth on the upper surface of the rack are meshed with teeth at the bottom of a gear. For the adjusted door opening size-controllable controllable cervical vertebra posterior modeling steel plate, by setting the rack and the gear, fixed screws are placed on a vertebral plate side and a side block 10 for fastening and fixation before the vertebral plate is opened； the cervical vertebra is slowly distracted by using the rack and the gear so as to increase safety and operation accuracy when the cervical vertebra is opened； meanwhile, the rack and gear can be finely adjusted and clamped at any time in the process of slowly distracting the cervical vertebra, thereby avoiding that the cervical vertebra is too fast and excessively distracted, also avoiding the problems that 15 the cervical vertebra is insufficiently distracted once and the like, realizing the controllable cervical vertebra opening range, shortening the surgical time, improving the accuracy and safety of surgical operation, and ensuring the surgical effect. FIG. 11/2 7 5 4 A 13 2 1 3 14 FIG.1 A 12 10 7 FJG.2
