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US 10,869,722 B2Granted
Method and fixture for guided pedicle screw placement
AssigneeRochester Institute of Technology
InventorsMichael R. Caldwell, Mark W. Olles, Amit Singla
Life of this patent
Estimating the term…
Abstract
A customized patient-specific combined template and implant for spinal fixation and method for use.
Claims9
A method for spinal fixation comprising:
- scanning an affected segment of the spine of a patient in need of spinal fixation to generate image data;
- generating a 3D model of the spine from the image data;
- selecting a set of screw paths in the 3D model for attachment of an implant to the affected segment of the spine;
- generating a 3D digital template of a combination screw guide fixture and implant comprising screw guides corresponding to the set of selected screw paths and at least one self-alignment bar comprising a vertebra mating surface;
- making the combination screw guide fixture and implant from the 3D digital template by additive manufacturing;
- locating the combination screw guide fixture and implant on the affected segment of the spine aligning the screw guides with the set of selected screw paths and contacting the at least one self-alignment bar vertebra mating surface with the vertebra;
- drilling a hole in the vertebra corresponding to each screw path in the set of selected screw paths using the screw guides;
- placing a surgical screw through each screw guide into the corresponding hole in the vertebra;
- and
- tightening each surgical screw until the combination screw guide fixture and implant is tightly seated to the vertebra.
7 more elements
A customized patient-specific spinal fixation combination screw guide fixture and implant comprising:
- an additive manufacturing-made spinal fixation combination screw guide fixture and implant, comprising a left-side rod;
- a right-side rod;
- and a plurality of interconnecting bars connecting the left-side rod to the right-side rod, the left-side rod comprising a at least two self-alignment bars comprising a corresponding vertebra mating surface and extending out from the left-side rod and a plurality of screw passages suitable for accepting screws capable of tightening the combination screw guide fixture and implant to vertebra, the right-side rod comprising at least two self-alignment bars comprising a corresponding vertebra mating surface and extending out from the right-side rod and a plurality of screw passages suitable for accepting screws capable of tightening the combination screw guide fixture and implant to vertebra which combination screw guide fixture and implant remains screwed on the vertebra after spinal fixation, wherein one of multiple screw passages of the left-side rod plurality of screw passages are paired with a corresponding one of multiple screw passages of the right-side rod plurality of screw passages by connection to one of the plurality of interconnecting bars.
Dependencies are inferred from the claim text.