Abstract
This study aimed to establish and validate a novel evaluation method using digital tomosynthesis to quantify bone formation in the gap after opening wedge high tibial osteotomy (OW-HTO). We retrospectively analyzed bone formation in the gap in 22 patients who underwent OW-HTO using digital tomosynthesis at 1, 2, 3, 6, 9, and 12 months postoperatively. Bone formation was semi-quantitatively assessed using the modified van Hemert’s score and density measurements on digital tomosynthesis images. The gap filling value (GFV) was calculated as the ratio of the intensities of the opening gap and the tibial shaft. In addition, the relationship between the modified van Hemert’s score and GFV was evaluated. The reproducibility of GFV had an interclass correlation coefficient (ICC [1,2]) of 0.958 for intraobserver reliability and an ICC (2,1) of 0.975 for interobserver reliability. The GFV increased in a time-dependent manner and was moderately correlated with the modified van Hemert’s score (r = 0.630, p < 0.001). The GFV plateaued at 6 months postoperatively. In addition, the GFV was higher in patients with a modified van Hemert’s score of 2 than in patients with a modified van Hemert’s score of 3 (p = 0.008). The GFVs obtained using digital tomosynthesis can be used to assess postoperative bone formation in the opening gap after OW-HTO with high accuracy and reproducibility.
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The authors declare that they had full access to all of the data in this study, and the authors take complete responsibility for the integrity of the data and the accuracy of the data analysis.
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K.I., E.S., E.W., and Y.I. contributed to the conception and design of the study. K.I., E.S., S.Y., S.S., and Y.K. contributed to the acquisition of the data. K.I., E.S., and E.W. contributed to the analysis and/or interpretation of the data. K.I., E.S., S.T., K.T., and Y.I. drafted the manuscript. Y.I. is the guarantor. The corresponding author attests that all the listed authors meet the authorship criteria and that no other authors meeting the criteria have been omitted.
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Ishibashi, K., Sasaki, E., Wijaya, E. et al. A Novel Quantitative Evaluation of Bone Formation After Opening Wedge High Tibial Osteotomy Using Tomosynthesis. J Digit Imaging 35, 1373–1381 (2022). https://doi.org/10.1007/s10278-022-00630-x
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DOI: https://doi.org/10.1007/s10278-022-00630-x