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Assessing 3-D Printing in Hip Replacement Surgical Planning
Giulia Facco1, Luciano Greco2, Marco Mandolini2
1Giulia Facco, MD, works in the Department of Clinical and Molecular Science for Università Politecnica delle Marche in Ancona, Italy. g.facco@pm.univpm.it.
Radiologic Technology
|January 12, 2022
Summary
3-D printed femoral head models from CT scans show good accuracy for surgical planning, with an average deviation of 0.651 mm. This technology aids orthopedic surgeons by providing precise patient-specific anatomical models.
Area of Science:
- Orthopedic Surgery
- Medical Imaging
- Biomedical Engineering
Background:
- 3-D printed models are increasingly used in surgical planning.
- Evaluating the accuracy of these models is crucial for clinical application.
Purpose of the Study:
- To assess the accuracy of 3-D printed femoral head models derived from preoperative CT scans.
- To compare cartilage thickness between bony specimens and 3-D printed models.
- To calculate the standard deviation between CT-based and laser scan-based 3-D models.
Main Methods:
- Retrospective analysis of 10 patients undergoing hip replacement.
- Creation of 3-D printed femoral head models from preoperative CT data.
- Collection and scanning (CT and laser) of bony specimens for comparison.
- Histological analysis for cartilage thickness measurement.
Main Results:
- Average standard deviation between bony specimen models and CT-based printed models was 0.651 mm.
- Estimated cartilage thickness was approximately 1.487 mm.
- Direct comparison of models allowed for accuracy evaluation.
Conclusions:
- Preoperative CT-based 3-D printed models demonstrate encouraging accuracy for surgical planning.
- Understanding potential error sources in the 3-D printing workflow is important.
- Awareness of 3-D printed model precision is vital for orthopedic surgeons.
