{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,5]],"date-time":"2026-09-05T19:10:00Z","timestamp":1788635400586,"version":"build-2803163510"},"reference-count":42,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2011,7,15]],"date-time":"2011-07-15T00:00:00Z","timestamp":1310688000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2012,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>Medial patellofemoral ligament (MPFL) reconstruction has been performed to treat recurrent patellar dislocation. However, the effects on patellar tracking have not been well documented, particularly in patients. The purpose of this study is to compare patellar tracking pattern and chondral status at MPFL reconstruction with those at second\u2010look arthroscopy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Between 1999 and 2008, 71 patients with recurrent patellar dislocation underwent MPFL reconstruction using a double\u2010looped semitendinosus tendon. Of these, 25\u00a0knees in 24 patients underwent second\u2010look arthroscopy (at 6\u201326\u00a0months after initial surgery), forming the subject for the present study. No other surgical procedures such as tibial tuberosity transfer, lateral release, or osteotomy were performed in any patients. To assess the patellar tracking pattern, the position of the patella on femoral groove was evaluated arthroscopically during passive knee motion through lateral suprapatellar portal.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Before MPFL reconstruction, the patella in all patients was shifted laterally throughout the entire range of knee motion. Immediately after MPFL reconstruction, patellar malalignment was corrected in all cases. On second\u2010look arthroscopy, two different patellar tracking patterns were observed. In 9\u00a0knees, the patella was located on the center of the femoral groove throughout the range of motion. Meanwhile, in the remaining 16\u00a0knees, the patella was shifted laterally at knee extension and migrated to the center of femoral groove with increased knee flexion. No significant deteriorations in chondral status were seen on second\u2010look arthroscopy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The present study revealed that not all improved patellar trackings after MPFL reconstruction remained intact at follow\u2010up. Chondral status in patellofemoral joint was not aggravated by MPFL reconstruction.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>Therapeutic studies, Level IV.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-011-1609-7","type":"journal-article","created":{"date-parts":[[2011,7,14]],"date-time":"2011-07-14T08:51:10Z","timestamp":1310633470000},"page":"829-837","source":"Crossref","is-referenced-by-count":47,"title":["Effects of medial patellofemoral ligament reconstruction on patellar tracking"],"prefix":"10.1002","volume":"20","author":[{"given":"Keisuke","family":"Kita","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopaedic Surgery Osaka University Graduate School of Medicine 2\u20102 Yamada\u2010oka, Suita 565\u20100871 Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuji","family":"Horibe","sequence":"additional","affiliation":[{"name":"<!--<label>2<\/label>--> Department of Sports 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