Three-dimensional locator for pedicle for cervical vertebra arch

Abstract

The locator for planting screw to pedicle for cervical vertebra arch correctly during orthopaedical operation consists of two force arm rods with middle long slot and side block foot in front end, a middle sliding board between the two force arm rods and with upper end hinged to the cross point of a cross rack, an arched rod connected to the middle sliding board, an aimer comprising integral lower support and upper bit guiding pipe, and two articular process foot rods with articular process foot in its upper end and long slot. The upper ends of two force arm rods are connected via adjusting screw bolt to the long slots of the two articular process foot rods, so that the two articular process foot rods may be shifted vertically and horizontally.

Description

technical field [0001] The invention relates to a positioner for accurate implantation of cervical pedicle screws in orthopedic surgery. Background technique [0002] Pedicle screws play an important role in the treatment of spinal trauma reduction, deformity correction, and instability reconstruction. At present, the use of pedicle screws has been extended from the lumbar spine to the thoracic spine, and even the cervical spine. The excellent biomechanical properties of cervical pedicle screw fixation have been confirmed and clinical application has achieved gratifying results. However, in comparison, the pedicles of the cervical spine are smaller than those of the lumbar and thoracic spine, and the direction of travel is complex, with large individual differences and variability. Therefore, the clinical application of cervical pedicle screws is limited. Although there have been reports on the positioning of cervical pedicles, such as (1): the domestic Wang Donglai method...

AI Technical Summary

Problems solved by technology

However, the above methods (1)-(6) are more complicated and without the help of a locator, the distance and angle can be fully estimated during the operation, and the error is difficult to control

And the instrument that can be used for carrying out pedicle location at present has only above-mentioned (7) kind of method, promptly " computer three-dimensional navigation system ", its price is very expensive, is difficult to popularize clinically, develops.

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