{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,3]],"date-time":"2026-10-03T07:07:26Z","timestamp":1791011246928,"version":"4.1.0"},"reference-count":32,"publisher":"Georg Thieme Verlag KG","issue":"11","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Knee Surg"],"published-print":{"date-parts":[[2020,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Problems and complications concerning the patellar fixation in medial patellofemoral ligament reconstruction (MPFLR) have been reported. The purpose of this retrospective study was to systematically analyze the surgical technique for MPFLR with a V-shaped patellar bonetunnel for implant-free fixation of an autologous gracilis tendon, allowing early functional rehabilitation, regarding restoration of the patellofemoral stability, patient satisfaction, return to sports, and technique-specific complications. In 2010, 128 cases of consecutive isolated MPFLR were performed. All these cases were included. After a minimum follow-up of 3 years, 104 cases were retrospectively analyzed (follow-up: 81.3%) with regard to redislocation, subjective functional outcome (Tegner's score and sports level compared with preoperative level), patient satisfaction, revision surgery, and technique-specific complications. After a follow-up of 45.7\u2009\u00b1\u20093.2 months, 101 of 104 cases (97.1%) showed no redislocation. Mean Tegner's score was 5.1\u2009\u00b1\u20091.8 (range, 2\u20139). A total of 61.5% patients reported about a higher sports level compared with their preoperative level. The patient satisfaction was high with 94.2%. In two cases (1.9%), technique-specific problems occurred as the bone bridge of the V-shaped tunnel was insufficient due to a malpositioning of the aiming device. No further technique-specific problems occurred and no revision surgery was necessary during the observational period. The presented surgical technique is safe and it reliably restores the patellofemoral stability, with a low rate of redislocations, an excellent subjective functional outcome, and a high-patient-reported satisfaction. No major technique-specific complications occurred.<\/jats:p>","DOI":"10.1055\/s-0039-1692654","type":"journal-article","created":{"date-parts":[[2019,7,3]],"date-time":"2019-07-03T22:47:52Z","timestamp":1562194072000},"page":"1140-1146","source":"Crossref","is-referenced-by-count":8,"title":["Midterm Results after Implant-Free Patellar Fixation Technique for Medial Patellofemoral Ligament Reconstruction"],"prefix":"10.1055","volume":"33","author":[{"given":"Philipp","family":"Mayer","sequence":"additional","affiliation":[{"name":"Center for Sports Orthopedics and Special joint surgery, Orthopedic Hospital Markgr\u00f6ningen, Markgr\u00f6ningen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philipp","family":"Schuster","sequence":"additional","affiliation":[{"name":"Center for Sports Orthopedics and Special joint surgery, Orthopedic Hospital Markgr\u00f6ningen, Markgr\u00f6ningen, Germany"},{"name":"Paracelsus Medical Private University, Clinic Nuremberg Departement of Orthopedics and Traumatology, Nuremberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Schlumberger","sequence":"additional","affiliation":[{"name":"Center for Sports Orthopedics and Special joint surgery, Orthopedic Hospital Markgr\u00f6ningen, Markgr\u00f6ningen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin","family":"Eichinger","sequence":"additional","affiliation":[{"name":"Center for Sports Orthopedics and Special joint surgery, Orthopedic Hospital Markgr\u00f6ningen, Markgr\u00f6ningen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Pfaff","sequence":"additional","affiliation":[{"name":"Center for Sports Orthopedics and Special joint surgery, Orthopedic Hospital Markgr\u00f6ningen, Markgr\u00f6ningen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Micha","family":"Immend\u00f6rfer","sequence":"additional","affiliation":[{"name":"Center for Sports Orthopedics and Special joint surgery, Orthopedic Hospital Markgr\u00f6ningen, Markgr\u00f6ningen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J\u00f6rg","family":"Richter","sequence":"additional","affiliation":[{"name":"Center for Sports Orthopedics and Special joint surgery, Orthopedic Hospital Markgr\u00f6ningen, Markgr\u00f6ningen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"194","published-online":{"date-parts":[[2019,7,3]]},"reference":[{"issue":"07","key":"ref1","doi-asserted-by":"crossref","first-page":"1600","DOI":"10.1177\/0363546514529639","article-title":"Occult intra-articular knee injuries in children with hemarthrosis","volume":"42","author":"M Askenberger","year":"2014","journal-title":"Am J Sports Med"},{"issue":"04","key":"ref2","doi-asserted-by":"crossref","first-page":"472","DOI":"10.1177\/03635465000280040601","article-title":"Characteristics of patients with primary acute lateral patellar dislocation and their recovery within the first 6 months of injury","volume":"28","author":"D M Atkin","year":"2000","journal-title":"Am J Sports Med"},{"issue":"06","key":"ref3","first-page":"630","article-title":"[The treatment of patellar dislocation: a systematic review]","volume":"149","author":"S Frosch","year":"2011","journal-title":"Z Orthop Unfall"},{"issue":"02","key":"ref4","doi-asserted-by":"crossref","first-page":"48","DOI":"10.1097\/JSA.0b013e318053eb74","article-title":"Current concepts on anatomy and biomechanics of patellar stability","volume":"15","author":"A A Amis","year":"2007","journal-title":"Sports Med Arthrosc Rev"},{"issue":"07","key":"ref5","doi-asserted-by":"crossref","first-page":"926","DOI":"10.1016\/j.arthro.2009.11.004","article-title":"Magnetic resonance imaging characteristics of the medial patellofemoral ligament lesion in acute lateral patellar dislocations considering trochlear dysplasia, patella alta, and tibial tuberosity-trochlear groove distance","volume":"26","author":"P Balcarek","year":"2010","journal-title":"Arthroscopy"},{"issue":"01","key":"ref6","first-page":"17","article-title":"Medial patellofemoral ligament injury patterns and associated pathology in lateral patella dislocation: an MRI study","volume":"1","author":"P Guerrero","year":"2009","journal-title":"Sports Med Arthrosc Rehabil Ther Technol"},{"issue":"01","key":"ref7","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1016\/j.knee.2017.10.002","article-title":"Does different duration of non-operative immobilization have an effect on the redislocation rate of primary patellar dislocation? 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