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Disease-specific results after MPFL reconstruction linked with trochlear dysplasia
Investigators of this study found trochlear dysplasia significantly correlated with disease-specific outcomes after medial patellofemoral ligament reconstruction and that disease-specific quality of life scores improved following patellofemoral stabilization.
Researchers evaluated 203 patients who underwent isolated patellofemoral stabilization surgeries and had adequate lateral radiographs and Banff Patella Instability Instrument (BPII) scores. Of these patients, 152 underwent medial patellofemoral ligament reconstruction (MPFL-R). The remaining 51 patients had a medial patellofemoral ligament imbrication (MPFL-I). Investigators classified patients as having no dysplasia, low-grade trochlear dysplasia or high-grade trochlear dysplasia. Differences between preoperative and postoperative BPII scores were determined with the independent-samples t test. At a mean of 24 months following patellofemoral stabilization, Spearman rho correlations were calculated for the three different trochlear dysplasia groups and for the BPII scores.
Results showed BPII scores for both groups improved significantly from preoperative scores to postoperative scores. Investigators noted the mean BPII score for patients in the MPFL-R group went from 24.36 to 65.16 and the BPII scores for patients who underwent MPFL-I improved from 28.92 to 73.45. Results from the Spearman rho correlation indicated postoperative BPII scores were significantly associated with the presence of a trochlear bump and the degree of dysplasia for the MPFL-R group. Investigators found that, overall, lower postoperative BPII scores correlated with a trochlear bump of at least 5 mm.‒ by Monica Jaramillo
Disclosure: The researchers report no relevant financial disclosures.