Submission ID 94006
| Poster Code | HR-P-82 |
|---|---|
| Title of Abstract | Comparison of Structured Light 3D Scanning to MicroCT for Measurement of Bone Defect Volumes in Simulated Revision Total Knee Arthroplasty |
| Abstract Submission | Purpose: Failures of Total Knee Arthroplasty (TKA) may be associated with significant bone loss. Restoration of bone loss is critical for success of revision TKA and depends on location and size of bone defects. Currently there is no method of measuring bone defects intraoperatively. The aim of our study is to utilize Structured Light (SL) 3D scanning to quantitatively measure volume of bone defects. Our primary objective is to compare accuracy of SL 3D scanning to micro Computed Tomography (mCT) for measurement of tibial bone defect volumes in simulated revision TKA. Methods: Revision TKA was simulated on four native knees in two cadavers. Contained tibial defects were prepared using 38-44mm acetabular reamers. Bone defects were scanned in situ with SL scanner and subsequently with mCT. Volumes of reconstructed 3D models were measured five times for each specimen. Agreement between SL and mCT volumes were analyzed using Bland-Altman plots with mCT as gold standard. Measurement bias and limits of agreement were calculated with Stata software (17.0). A priori mean difference of 5mL was set as threshold for clinical significance. Results: Bone defect volumes ranged from 35.27 mL (SD 0.36 mL) to 41.72 mL (SD 0.23 mL) as measured by mCT and from 34.05 mL (SD 0.48 mL) to 38.82 mL (SD 0.38 mL) as measured by SL. Bland-Altman analysis revealed a mean difference of 0.97 mL (95% CI 0.33 to 1.62 mL) between mCT and SL measurements. Limits of agreement ranged from -1.73 mL (95% CI -3.18 to -0.90 mL) to 3.68mL (95% CI 2.85 to 5.13 mL). Conclusion: Based on mean difference of mCT and SL volume measurements being smaller than the a priori threshold and all the measurements falling within the limits of agreement, we conclude that SL 3D scanning is an accurate method to measure bone defects intraoperatively. |
| Please indicate who nominated you | Dalhousie University, Department of Surgery, Clinician Investigator Program |
| What Canadian Institutes of Health Research (CIHR) institute is your research most closely aligned? | Musculoskeletal Health and Arthritis |
| What Canadian Institutes of Health Research (CIHR) pillar of health research does your research fall under? | Biomedical |
| PDF of abstract | Shahriar Seddigh - DoS 2023 - rTKA bone defects.pdf 2023-03-02 at 18:06:19 |
| Presenter and Author(s) | Shahriar Seddigh Shahriar Seddigh |
