[Objective]To explore the clinical outcomes of posterior lumbar interbody fusion(PLIF)with bone cement augmented pedi-cle screw by graduated or non-graduated pushrods for osteoporotic lumbar degenerative diseases.[Methods]A retrospective study was per-formed on 42 patients who underwent PLIF with bone cement augmented pedicle screw for osteoporotic lumbar degenerative diseases from October 2021 to October 2022.According to doctor-patient communication,22 patients had the graduated pushrod used for bone cement augmentation of the pedicle screws,while the other 20 patients had the ungraduated rod used.The perioperative,follow-up and imaging data of the two groups were compared.[Results]The graduated group proved significantly superior to the ungraduated group in terms of operation time[(142.7±53.4)min vs(164.3±58.6)min,P＜0.05],intraoperative fluoroscopy times[(10.2±2.3)times vs(15.3±1.8)times,P＜0.05],intra-operative blood loss[(246.6±123.8)ml vs(324.1±113.8)ml,P＜0.05],despite of insignificant differences in total incision length,incision healing grade,walking time and hospital stay between the two groups(P＞0.05).In addition,the graduated group got significantly lower bone cement leakage rate than the ungraduated group(4.5％vs 11.3％,P＜0.05).The follow-up period lasted for(13.9±3.2)months in a mean,and there was no significant difference in time to resume full weight-bearing activities between the two groups(P＞0.05).The VASs and ODI scores decreased significantly over time in both groups(P＜0.05),which were not statistically significant between the two groups at any time points accordingly(P＞0.05).Regarding imaging,the lumbar lordosis(LL)significantly improved in both groups 3 months after surgery and at the last follow-up compared with those preoperatively(P＜0.05).However,there were no significant differences in terms of LL angle and Bridwell fusion grade between the two groups at any time points accordingly(P＞0.05).[Conclusion]In the case of lumbar interbody fusion for osteoporotic lumbar degenerative diseases,the bone cement augmented pedicle screw with the graduated pushrod does reduce the num-ber of fluoroscopy,shorten the operation time and reduce the risk of leakage of bone cement.
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