NDLI: Accuracy of guide wire placement for femoral neck stabilization using 3D printed drill guides

Content Provider	Springer Nature : BioMed Central
Author	Roytman, Gregory R. Ramji, Alim F. Beitler, Brian Yoo, Brad Leslie, Michael P. Baumgaertner, Michael Tommasini, Steven Wiznia, Daniel H.
Abstract	Background The goal of stabilization of the femoral neck is to limit morbidity and mortality from fracture. Of three potential methods of fixation, (three percutaneous screws, the Synthes Femoral Neck System, and a dynamic hip screw), each requires guide wire positioning of the implant(s) in the femoral neck and head. Consistent and accurate positioning of these systems is paramount to reduce surgical times, stabilize fractures effectively, and reduce complications. To help expedite surgery and achieve ideal implant positioning in the geriatric population, we have developed and validated a surgical planning methodology using 3D modelling and printing technology. Methods Using image processing software, 3D surgical models were generated placing guide wires in a virtual model of an osteoporotic proximal femur sawbone. Three unique drill guides were created to achieve the optimal position for implant placement for each of the three different implant systems, and the guides were 3D printed. Subsequently, a trauma fellowship trained orthopedic surgeon used the 3D printed guides to position 2.8 mm diameter drill bit tipped guide wires into five osteoporotic sawbones for each of the three systems (fifteen sawbones total). Computed Tomography (CT) scans were then taken of each of the sawbones with the implants in place. 3D model renderings of the CT scans were created using image processing techniques and the displacement and angular deviations at guide wire entry to the optimal sawbone model were measured. Results Across all three percutaneous screw guide wires, the average displacement was 3.19 ± 0.12 mm and the average angular deviation was 4.10 ± 0.17o. The Femoral Neck System guide wires had an average displacement of 1.59 ± 0.18 mm and average angular deviation of 2.81 ± 0.64o. The Dynamic Hip Screw had an average displacement of 1.03 ± 0.19 mm and average angular deviation of 2.59 ± 0.39o. Conclusion The use of custom 3D printed drill guides to assist with the positioning of guide wires proved to be accurate for each of the three types of surgical strategies. Guides which are used to place more than 1 guide wire may have lower positional accuracy, as the guide may shift during multiple wire insertions. We believe that personalized point of care drill guides provide an accurate intraoperative method for positioning implants into the femoral neck.
Related Links	https://threedmedprint.biomedcentral.com/counter/pdf/10.1186/s41205-022-00146-8.pdf
Ending Page	8
Page Count	8
Starting Page	1
File Format	HTM / HTML
ISSN	23656271
DOI	10.1186/s41205-022-00146-8
Journal	3D Printing in Medicine
Issue Number	1
Volume Number	8
Language	English
Publisher	BioMed Central
Publisher Date	2022-07-04
Access Restriction	Open
Subject Keyword	Imaging Radiology Surgery Biomedical Engineering and Bioengineering Biomaterials 3D printing Drill guide Prophylaxis In silico Percutaneous screws Femoral neck system Dynamic hip screw
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering Radiology, Nuclear Medicine and Imaging Computer Science Applications
Journal Impact Factor	3.2/2023

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