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Postoperative accuracy quantification of corrective osteotomies: standardisation of Q3D-CT methodology
Sander J C Tabernée Heijtmeijer1,2, Anne M L Meesters3,4, Nico J J Verdonschot5,6
13D-Lab, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands. s.j.c.tabernee.heijtmeijer@umcg.nl.
Summary
This study introduces a new 3D CT method for assessing surgical accuracy after corrective osteotomies. The technique offers reliable and objective postoperative analysis, improving surgical outcome evaluation.
Area of Science:
- Orthopedic surgery
- Medical imaging
- Surgical planning
Background:
- Current methods for 3D analysis of virtually planned surgery accuracy lack a gold standard.
- Accurate postoperative assessment is crucial for evaluating corrective osteotomies.
Purpose of the Study:
- To present a novel, validated, and standardized methodology for 3D postoperative assessment of surgical accuracy.
- To evaluate the accuracy of 3D virtually planned and guided corrective osteotomies.
Main Methods:
- Utilized postoperative CT scans from patients undergoing 3D planned corrective osteotomy.
- Compared postoperative CT data with preoperative virtual surgical planning to determine accuracy.
- Developed a new quantification methodology based on rotation axes of virtual bone models.
- Assessed inter- and intra-observer reliability using the Intraclass correlation coefficient.
Main Results:
- Median 3D translation: 2.43 mm (IQR 3.17).
- Median angular deviations: 3D rotation 0.66° (IQR 1.66°), 2D coronal 0.74° (IQR 0.44°), 2D sagittal 0.99° (IQR 1.27°), 2D axial 2.37° (IQR 5.00°).
- Excellent inter- and intra-observer reliability (ICC > 0.76) was achieved.
Conclusions:
- The proposed 3D CT technique offers a more accurate and objective method for assessing surgical outcomes in guided corrective osteotomies.
- The novel methodology demonstrates excellent reliability and clinically acceptable measurements for surgical accuracy.
