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- W4236222022 abstract "Abstract Background: If bone union is expected, conservative treatment is generally selected for lumbar spondylolysis. However, sometimes conservative treatments are unsuccessful. We sought to determine the factors associated with failure of bony union in acute unilateral lumbar spondylolysis with bone marrow edema including contralateral pseudoarthrosis. Methods: This study targeted unilateral lumbar spondylolysis treated conservatively in high school or younger students. Conservative therapy was continued until the bone marrow edema disappeared on MRI and bone union was investigated by CT. We conducted a univariate analysis of sex, age, pathological stage, lesion level complicating the contralateral bone defect, lesion level, and intercurrent spina bifida occulta, and variables with p < 0.1 were considered in a logistic regression analysis. An item with p < 0.05 was defined as a factor associated with failure of bony union. Results: We found 92 cases of unilateral spondylolysis with bone marrow edema and 66 cases were successfully treated conservatively. Failure of bony union in unilateral lumbar spondylolysis with bone marrow edema was associated with advanced pathological stage ( p = 0.004), contralateral pseudoarthrosis ( p < 0.001), and L5 lesion level ( p = 0.002). The odds ratio was 20.0 (95% CI 3.0–193.9) for advanced pathological stage, 78.8 (95% CI 13–846) for contralateral pseudoarthrosis, and 175 (95% CI 8.5–8192) for L5 lesion level. Conclusions: Conservative therapy aiming at bony union is contraindicated in cases of acute unilateral spondylolysis when the pathological stage is advanced, the lesion level is L5, or there is contralateral pseudoarthrotic spondylolysis." @default.
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- W4236222022 date "2021-01-11" @default.
- W4236222022 modified "2023-09-25" @default.
- W4236222022 title "Factors associated with failure of bony union after conservative treatment of acute cases of unilateral lumbar spondylolysis" @default.
- W4236222022 doi "https://doi.org/10.21203/rs.3.rs-35702/v3" @default.
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