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How precise is excision and reconstruction using 3D printing technology for total sacrectomy: accuracy validation in
Qianyu Shi1, Jiazhi Zhu1, Haijie Liang1
1Department of Musculoskeletal Tumor, People's Hospital, Peking University, Beijing, 100044, China.
3D Printing in Medicine
|July 30, 2025
Summary
3D printing enables precise osteotomy and reconstruction in total sacrectomy for sacral tumors. Patient-specific jigs and custom implants ensure high accuracy, improving surgical outcomes and lumbosacral stability.
Area of Science:
- Orthopedic Surgery
- Surgical Oncology
- Biomedical Engineering
Background:
- 3D printing technology allows for precise surgical planning using preoperative imaging.
- Patient-specific surgical jigs enhance osteotomy accuracy.
- Custom 3D-printed endoprostheses combined with screw-rod systems restore lumbosacral stability.
Purpose of the Study:
- To evaluate the accuracy of 3D printing technology in achieving precise osteotomy during total sacrectomy.
Main Methods:
- Nine patients with primary malignant sacral tumors underwent total sacrectomy.
- Osteotomy was planned using fused CT and MRI, with a 8-10 mm margin.
- Patient-specific jigs and 3D-printed endoprostheses were designed based on planned osteotomy planes.
- Pre- and postoperative 3D models were compared to assess osteotomy and reconstruction accuracy.
Main Results:
- All nine patients achieved R0 resection.
- Average angular deviation was 4.27°, with position deviation of 4.00 mm.
- Deviations varied slightly across different osteotomy levels but remained within acceptable limits.
- All endoprostheses were well-positioned postoperatively, with good functional scores (MSTS93: 19.4, MUD: 16.3).
Conclusions:
- 3D-printed patient-specific surgical jigs demonstrate high accuracy for osteotomy in total sacrectomy.
- Custom 3D-printed endoprostheses provide effective and reliable reconstruction.
- The application of 3D printing technology significantly enhances surgical accuracy for total sacrectomy.
