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The positional consistency between guidewire and cannulated or solid screw in robot-assisted spinal internal fixation surgery – Lumbar Fusion

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This article explores the positional consistency between guidewires and screws in spinal internal fixation surgery. The study included 64 patients who underwent robot-assisted thoracic or lumbar pedicle screw fixation surgery. The accuracy of the guidewire and screw placement was measured using CT images. The positional consistency between the guidewire and screw was evaluated based on fused CT images. The study found that solid screws showed worse positional accuracy and guidewire-screw consistency compared to cannulated screws. The cortical bone of the pedicle had a positive guide effect on both types of screws. These findings suggest that pedicle screws may alter trajectory despite the guidance of guidewires

Summarised by Mr Mo Akmal – Lead Spinal Surgeon
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Published article

: The pedicle screws may alter trajectory despite the guidance of the guidewires. Solid screws show worse positional accuracy and guidewire-screw consistency compared with cannulated screws. Trial registration The study was retrospectively registered and approved by our center’s institutional review board.

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J Orthop Surg Res. 2024 Jan 5;18(1):708. doi: 10.1186/s13018-023-04053-4.ABSTRACTBACKGROUND: This study aimed to investigate the positional consistency between the guidewire and the screw in spinal internal fixation surgery.METHODS: This study involved 64 patients who underwent robot-assisted thoracic or lumbar pedicle screw fixation surgery. Guidewires were inserted with the assistance of the Tirobot. Either cannulated screws,

J Orthop Surg Res. 2024 Jan 5;18(1):708. doi: 10.1186/s13018-023-04053-4.

ABSTRACT

BACKGROUND: This study aimed to investigate the positional consistency between the guidewire and the screw in spinal internal fixation surgery.

METHODS: This study involved 64 patients who underwent robot-assisted thoracic or lumbar pedicle screw fixation surgery. Guidewires were inserted with the assistance of the Tirobot. Either cannulated screws or solid screws were inserted. Guidewire and screw accuracy was measured using CT images based on the Gertzbein and Robbins scale. The positional consistency between guidewire and screw was evaluated based on the fused CT images, which could graphically and quantitatively demonstrate the consistency. The consistency was evaluated based on a grading system that considered the maximum distance and angulation between the centerline of the guidewire and the screw in the region of the pedicle.

RESULTS: A total of 322 screws were placed including 206 cannulated ones and 116 solid ones. Based on the Gertzbein and Robbins scale, 97.5% of the guidewires were grade A, and 94.1% of the screws were grade A. Based on our guidewire-screw consistency scale, 85% in cannulated group, and 69.8% in solid group, were grade A. Both solid and cannulated screws may alter trajectory compared to the guidewires. The positional accuracy and guidewire-screw consistency in the solid screw group is significantly worse than that in the cannulated screw group. The cortical bone of the pedicle has a positive guide effect on either solid or cannulated screws.

: The pedicle screws may alter trajectory despite the guidance of the guidewires. Solid screws show worse positional accuracy and guidewire-screw consistency compared with cannulated screws. Trial registration The study was retrospectively registered and approved by our center’s institutional review board.

PMID:38178197 | DOI:10.1186/s13018-023-04053-4

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The positional consistency between guidewire and cannulated or solid screw in robot-assisted spinal internal fixation surgery

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J Orthop Surg Res. 2024 Jan 5;18(1):708. doi: 10.1186/s13018-023-04053-4.ABSTRACTBACKGROUND: This study aimed to investigate the positional consistency between the guidewire and the screw in spinal internal fixation surgery.METHODS: This study involved 64 patients who underwent robot-assisted thoracic or lumbar pedicle screw fixation surgery. Guidewires were inserted with the assistance of the Tirobot. Either cannulated screws

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