Shi reports receiving grants from the National Natural Science Foundation of China, the Beijing Natural Science Foundation and the Beijing Nova Program. Please see the study for all other authors’ relevant financial disclosures.
Published results showed arthroscopically assisted medial patellofemoral complex reconstruction for patellar dislocation yielded high success rates with significant improvements in outcome measures and no redislocations.
Researchers retrospectively measured Dejour classification, tibial tubercle-trochlear groove (TT-TG) distance and patellar height with Insall-Salvati index among 39 patients who experienced at least two patellar dislocations and underwent primary arthroscopically assisted double-bundle medial patellofemoral complex reconstruction between January 2014 and November 2019. Researchers compared preoperative and postoperative patellar tilt and recorded information on outcome scores, ability to return to sports, postoperative recurrent dislocations and complications.
Results showed 19% of patients had Dejour B trochlear dysplasia, 33.3% had Dejour C trochlear dysplasia and 21.4% had Dejour D trochlear dysplasia. Researchers found patients had a mean TT-TG distance of approximately 19.6 mm and a mean Insall-Salvati index of approximately 1.21.
Researchers noted a decrease in mean patellar tilt from approximately 27.6° to 9.4°. Statistically significant improvements were found in mean IKDC, Lysholm, Kujala and Tegner scores among all patients, according to results. Among 96.9% of patients who returned to sport, researchers found 90.3% returned to the same or higher level of activity. Researchers noted no patients reported postoperative dislocations or subluxations.