Comparison of efficacy of arthroscopic bone trough with wire anchors versus anatomical reconstruction of the medial patellofemoral ligament with a single osseous tract in treatment of recurrent patellar dislocation
Objective To compare the clinical efficacy of arthroscopic bone trough osteotomy with wire anchors versus anatom-ical reconstruction of the medial patellofemoral ligament with a single osseous tract in the treatment of recurrent patellar disloca-tion.Methods Thirty-five patients of recurrent patellar dislocation treated with arthroscopic medial patellofemoral ligament reconstruction from January 2017 to January 2021 were retrospectively analyzed,of which 19 patellar sides were anatomically reconstructed with a monoskeletal channel(monoskeletal channel group),and 16 patellar sides were fixed by a bone trough with a threaded anchor nail(threaded anchor nail group).Surgical time,intraoperative bleeding,width of the reconstructed tendon on the patellar side,postoperative lateral patellofemoral angle,patellar fit angle,knee pain VAS score,knee Kujala score,and knee Lysholm score were compared between the two groups.Results All 35 cases were followed up for 12 to 16 months,with a mean of 13 months.All patients did not have patellar re-dislocation within 12 months after surgery.The operation time was shorter in the monocostal channel group than in the group with wire anchors,and the knee Kujala scores and knee Lysholm scores were higher than those in the group with wire anchors at 3,6,9,and 12 months postoperatively,and the difference was statistically significant(P＜0.05).The differences in intraoperative bleeding,lateral patellar reconstruction tendon width,lateral patellofemoral angle at 3 months postoperatively,patellar fit angle at 3 months postoperatively,and knee pain VAS scores at 3,6,9,and 12 months postoperatively were not statistically significant between the two groups(P＞0.05).Conclusion Compared with arthroscopic reconstruction of the medial patellofemoral ligament by bone trough with wire anchors for recurrent patellar dislocation,arthroscopic reconstruction of the medial patellofemoral ligament by unipatellar channel dissection for the treatment of recurrent patellar dislocation can shorten the operative time,which is more conducive to the early commencement of the pa-tient's rehabilitation,and the patient's improvement of the patellar stability and knee function is more obvious.
Recurrent patellar dislocationMedial patellofemoral ligamentLigament reconstructionMonofemoral tractAn-chor nail with wire
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