RESULTS OF ARTHROSCOPIC TREATMENT OF PATELLAR INSTABILITY IN CHILDREN

Quang Dinh Nam Vo1,, Hoang Trung Nguyen1
1 Hospital for Traumatology and Orthopaedics

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Abstract

Background: Despite arthroscopy is nọt strongly mentioned lately, it shows role in lateral release, medial reefing, avoiding bad scar. Objective: To evaluate arthroscopic indications in treatment of patellar instability in children. Materials and Methods: From 2013 to 2021, 33 patients (7-16yrs of age) with 35 knees were arthroscopically operated according to flow chart including first dislocations with loose body, recurrent dislocations, and habitual dislocations. Periods of follow-up were 2-10yrs (avg. 5.5yrs). The arthroscopic procedures comprised medial reefing, reconstruction of medial patellofemoral ligament, lateral release, quadriceps lengthening. Results of follow-up were relapse, complication, and functional result according to Kujala score. Results: Among 35 knees, there were 2 (5.7%) first dislocations, 30 (85.7%) recurrent dislocations, and 3 (8.6%) habitual dislocations; lateral release 27/35 (77.1%), medial reefing 23/35 (65.7%), reconstruction of medial patellofemoral ligament 12/35 (34.3%). The essential complication was a knee of extensive stiffness after medial reefing + lateral release. Relapses were in 4/35 (11.4%) of knees; not correlated to lateral release (p = 0,21), medial reefing or reconstruction of medial patellofemoral ligament (p = 0.07); About 23 knees of medial reefing, relapses were correlated to number of knots (p = 0.045). The final functional results according to Kujala were 88-100 (avg. 95.5). Conclusion: This study showed role of arthroscopy in both medial reefing and reconstruction of medial patellofemoral ligament. Our flow chart can be applied but needs numerous data and long-term follow-up. 

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References

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