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Published: 2023-01-31
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DOI: https://doi.org/10.52852/tcncyh.v162i1.1332
Issue
Vol. 162 No. 1 (2023)
Section
Các bài báo
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Sỹ Quyền Năng, V. ., Trung Hiếu, P. ., Tú Nam, V., Trung Dũng, T. ., Thanh Tùng, P., & Đình Toàn, D. (2023). 16. Radiological results of total knee replacement using patient-specific ct-based instrument. Journal of Medical Research, 162(1), 138-146. https://doi.org/10.52852/tcncyh.v162i1.1332

16. Radiological results of total knee replacement using patient-specific ct-based instrument

Vo Sy Quyen Nang, Pham Trung Hieu, Vu Tu Nam, Tran Trung Dung, Phan Thanh Tung , Duong Dinh Toan

Main Article Content

Abstract

In total knee replacement surgery, the use of patient-specific instruments (PSI) were reported to improve the accuracy of artificial joint placement. This study reported the CT scan results of the PSI printed by our hospital's 3D printing lab. A total of 18 patients were included in the study. All patients underwent preoperative CT scan to develop surgical plan and postoperative CT scan for outcome evaluation. Mimics Medical (Materialise-Belgium) software was used to create a template for the sizing and position of cutting jigs, as well as the PSI design. The PSI were printed by 3D resin printers. Intraoperatively, after removing all remaining cartilage in the knee, the PSI would be implanted to the femur and tibial surfaces, and the pin position for manufacturer's instruments would be marked. The preparation of the PSI took approximately three days. All PSI matched their respective preoperative templates in size. The postoperative whole-leg axis was 1.2° ± 1.7°, and the rotation mismatch between the femur and tibial implant was 0.5° ± 1.6°.  Radiological results showed that using PSI improved the accuracy of placement, especially in controlling the rotational alignment.

Article Details

Keywords

Knee osteoarthritis, total knee replacement, patient specific instrument, 3D CT-scanner, 3D printing

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