976 results match your criteria Patellofemoral Joint Syndromes


Effects of Patellofemoral Pain Syndrome on Changes in Dynamic Postural Stability during Landing in Adult Women.

Appl Bionics Biomech 2022 10;2022:7452229. Epub 2022 May 10.

Functional Rehabilitation Biomechanics Laboratory, Incheon National University, Incheon, Republic of Korea.

Background: This study investigated the effects of lower limb movements on dynamic postural stability (DPS) during drop landing in adult women with patellofemoral pain syndrome (PFPS).

Methods: Thirty-eight adult women were recruited and divided into two groups, the PFPS group and the control group. The study participants performed a single-leg drop landing from a 30 cm box, and their lower limb movements and DPS were measured. Read More

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The association and reliability of the frontal plane projection angle during the lateral step down test on knee function in patients with patellofemoral pain.

Knee 2022 Jun 10;36:87-96. Epub 2022 May 10.

School of Health & Rehabilitation Sciences, College of Medicine, The Ohio State University, Columbus, OH, United States; Sports Medicine Research Institute, The Ohio State University Wexner Medical Center, United States; Department of Orthopaedics, The Ohio State University Wexner Medical Center, United States.

Background: The lateral step-down test is used by physical therapists (PT) to identify movement faults in patients with patellofemoral pain (PFP). The FPPA is a measure of knee valgus and PTs have access to open source video analysis software and high quality smart phones and video cameras to implement 2D video analysis into practice. The purpose of our study was to determine the reliability of PTs measuring the frontal plane projection angle (FPPA) during the lateral step-down test, and to determine if the FPPA was associated with pain, self-reported knee function and fear of movement. Read More

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Double-level torsional osteotomy a treatment for the 'inwardly pointing knee' syndrome.

Arch Orthop Trauma Surg 2022 May 12. Epub 2022 May 12.

Klinik Für Orthopädie Und Unfallchirurgie Klinikum, Buger Straße 80, 96049, Bamberg, Germany.

Introduction: A 'inwardly pointing knee' syndrome is a combined torsional deformity with increased femoral internal and tibial external torsion. After clinical and radiological verification of the torsional deformity and unsuccessful conservative therapy approach, a combined (double level) torsional osteotomy of femur and tibia might be the appropriate treatment. Here, we present the diagnostic algorithms, treatment, and outcome of combined torsional osteotomies of femur and tibia. Read More

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Editorial Commentary: Real-Time Dynamic Magnetic Resonance Imaging of the Patellofemoral Joint: Ready for Prime Time?

Arthroscopy 2022 05;38(5):1581-1583

NYU Grossman School of Medicine, Langone Orthopedic Hospital.

Real-time dynamic magnetic resonance imaging (MRI) in the musculoskeletal system touts the ability to perceive in vivo joint kinematics, which is particularly attractive for diagnosing dynamic pathologies such as joint instability or impingement syndromes.The clinical utility of dynamic MRI in the musculoskeletal system is wide ranging, from patellofemoral kinematics to imaging of the hip in femoroacetabular impingement and also dynamic spine imaging. Patellofemoral instability is an ideal diagnostic target, as knee flexion and extension are easily performed in an MRI scanner, and dynamic measurements have been correlated to clinical and static radiologic parameters of instability. Read More

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Patella-patellar tendon angle in relation to the medial patellar plica syndrome, chondromalacia patella, and infrapatellar fat pad syndrome.

PLoS One 2022 17;17(3):e0265331. Epub 2022 Mar 17.

Department of Radiology, The Armed Forces Capital Hospital, Seongnam, Korea.

The patella-patellar tendon angle (PPTA) assessing the sagittal patellar tilt was reported to be related with anterior knee pain. Herein, clinical effect of PPTA in patients with medial patellar plica (MPP) syndrome, chondromalacia patella, and infrapatellar fat pad (IPFP) syndrome, the most common causes of anterior knee pain, was evaluated. In this retrospective study, 156 patients with anterior knee pain who underwent magnetic resonance imaging (MRI) and arthroscopic surgery that confirmed isolated MPP syndrome, chondromalacia patella, or IPFP syndrome from June 2011 to January 2021 were included in the study group and 118 patients without knee pathology on MRI during the same period were included in the control group. Read More

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Knee biomechanical factors associated with patellofemoral pain in recreational runners.

Knee 2022 Mar 4;35:87-97. Epub 2022 Mar 4.

Center for Human Movement Science, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA. Electronic address:

Background: Patellofemoral pain (PFP) is a common injury among runners. Knee biomechanical factors associated with PFP, however, remain unclear. The purpose of this study was to determine possible associations between knee biomechanics and symptoms of PFP in recreational runners. Read More

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Comparison of Patellofemoral Outcomes between Attune and PFC Sigma Designs: A Prospective Matched-Pair Analysis.

Clin Orthop Surg 2022 Mar 16;14(1):96-104. Epub 2021 Mar 16.

Department of Orthopaedics, Breach Candy Hospital Trust, Mumbai, India.

Backgroud: Attune (DePuy Synthes) prosthesis was designed to overcome patellofemoral complications associated with PFC Sigma (DePuy Synthes) prosthesis. The aim of our study was to compare the incidence of anterior knee pain (AKP), patellofemoral crepitus (PCr), and functional outcome between them.

Methods: This prospective matched-pair study was conducted between January 2014 and June 2015, during which 75 consecutive Attune total knee arthroplasties (TKAs) were matched with 75 PFC Sigma TKAs based on age, sex, body mass index, pathology, and deformity. Read More

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A postural program to reduce dynamic knee valgus during single-limb squatting in young athletes: a preliminary study.

J Sports Med Phys Fitness 2022 Feb 21. Epub 2022 Feb 21.

Postura e Sport SRL, Parma, Italy.

Background: Dynamic Knee Valgus (DKV) is an undesirable multi-joint movement pattern associated with anterior cruciate ligament injury and patellofemoral pain syndrome, especially in sport activities. We assessed DKV in young athletes who followed a postural program to reduce a posterior rigidity mostly attributable to the tightness of hamstring muscles.

Methods: We considered 12-18-year-old athletes that followed a six-week program simply based on hamstring stretching and abdominal muscle activation/strengthening. Read More

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February 2022

Pain severity during functional activities in individuals with patellofemoral pain: A systematic review with meta-analysis.

J Sci Med Sport 2022 May 26;25(5):399-406. Epub 2022 Jan 26.

Clinical and Applied Movement Sciences, Brooks College of Health, University of North Florida, USA. Electronic address:

Objectives: Patellofemoral pain (PFP) is a common lower extremity condition that results in pain during functional tasks. Currently, it is unknown the extent to which differences in pain levels exist in individuals with PFP compared to asymptomatic controls during functional task and if pain differ across various functional tasks. The purpose of this systematic review and meta-analysis is to evaluate pain levels between individuals with PFP and asymptomatic controls and compare pain severity across various functional tasks. Read More

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Offloading Effects on Impact Forces and Patellofemoral Joint Loading During Running in Females.

Gait Posture 2022 03 16;93:212-217. Epub 2022 Feb 16.

Department of Health Professions, Physical Therapy Program, University of Wisconsin, 1300 Badger Street, La Crosse, WI, United States; La Crosse Institute for Movement Science (LIMS), University of Wisconsin, 1300 Badger Street, La Crosse, WI, United States. Electronic address:

Background: Structure-specific loading is being increasingly recognized as playing a role in running related injuries. The use of interventions targeted at reducing patellofemoral joint loads have shown effectiveness in reducing symptoms of patellofemoral pain. Use of bodyweight support (BWS) has the potential to reduce loading on the patellofemoral joint during running to augment rehabilitation efforts. Read More

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Clinicians' experience of the diagnosis and management of patellofemoral pain: A qualitative exploration.

Musculoskelet Sci Pract 2022 Apr 11;58:102530. Epub 2022 Feb 11.

Sports and Exercise Medicine, School of Medicine and Dentistry, William Harvey Research Institute, Queen Mary University London, Mile End Hospital, Bancroft Road, London, E1 4DG, UK; Pure Sports Medicine, Point West Building, 116 Cromwell Road, London, SW7 4XR, UK.

Background: Patellofemoral pain (PFP) is common and has a poor long-term prognosis. There is a lack of clarity about the clinical reasoning of recognised inter-disciplinary experts in the published literature.

Objectives: To help identify best practice by exploring the clinical reasoning of a range of inter-disciplinary experts that regularly diagnose and treat PFP. Read More

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Talonavicular joint mobilization and foot core strengthening in patellofemoral pain syndrome: a single-blind, three-armed randomized controlled trial.

BMC Musculoskelet Disord 2022 Feb 15;23(1):150. Epub 2022 Feb 15.

Department of Physical Therapy, Sahmyook University, 815 Hwarang-ro, Nowon-gu, 01795, Seoul, Republic of Korea.

Background: Patellofemoral pain syndrome (PFPS) is defined as pain around the patella while performing activities such as squats, running, and climbing steps. One of the inherent risk factors for PFPS is an excessively pronated foot posture. The aim of this study was to investigate the effect of foot intervention, talonavicular joint mobilization (TJM) and foot core strengthening (FCS), on PFPS. Read More

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February 2022

Outcomes of medial patellofemoral ligament reconstruction and tibial tubercle osteotomy in syndromic adolescents with patellar dislocation.

J Clin Orthop Trauma 2022 Feb 14;25:101770. Epub 2022 Jan 14.

Department of Orthopaedic Surgery, Nemours/Alfred I. DuPont Hospital for Children, 1600 Rockland Rd., Wilmington, DE, 19803, USA.

Background: Treatment of congenital and habitual dislocation of the patella in syndromic adolescents can be difficult due to accompanying soft-tissue and/or osseous abnormalities often present in the knee. The aim of this study was to report the results of surgical treatment of congenital and habitual patellar dislocation with medial patellofemoral ligament (MPFL) reconstruction and tibial tubercle osteotomy (TTO) in adolescents with an underlying syndrome.

Methods: Syndromic adolescent patients with congenital or habitual patellar dislocation treated with MPFL reconstruction and TTO between 2005 and 2019 with a minimum of one year of follow-up were identified. Read More

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February 2022

May the force be with you: understanding how patellofemoral joint reaction force compares across different activities and physical interventions-a systematic review and meta-analysis.

Br J Sports Med 2022 May 3;56(9):521-530. Epub 2022 Feb 3.

La Trobe Sports and Exercise Medicine Research Centre, La Trobe University, Bundoora, Victoria, Australia.

Objective: To systematically review and synthesise patellofemoral joint reaction force (PFJRF) in healthy individuals and those with patellofemoral pain and osteoarthritis (OA), during everyday activities, therapeutic exercises and with physical interventions (eg, foot orthotics, footwear, taping, bracing).

Design: A systematic review with meta-analysis.

Data Sources: Medline, Embase, Scopus, CINAHL, SportDiscus and Cochrane Library databases were searched. Read More

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Comparing hip and knee focused exercises versus hip and knee focused exercises with the use of blood flow restriction training in adults with patellofemoral pain.

Eur J Phys Rehabil Med 2022 Apr 5;58(2):225-235. Epub 2022 Jan 5.

Department of Physiotherapy, Faculty of Health and Caring Sciences, University of West Attica, Athens, Greece.

Background: Hip and knee strengthening exercises are implemented in rehabilitation of patellofemoral pain patients, but typically use high loads (70% of 1 repetition maximum). This may lead to increased patellofemoral joint stress. Low load training (20-30% of 1 repetition maximum) with blood flow restriction could allow for exercise strength benefits to proximal and distal muscles with reduced joint stress and by promoting hypoalgesia. Read More

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Relationship between vastus medialis Hoffmann reflex excitability and knee extension biomechanics during different tasks in women with patellofemoral pain.

Clin Biomech (Bristol, Avon) 2022 01 6;91:105544. Epub 2021 Dec 6.

Laboratory of Biomechanics and Motor Control (LABCOM), School of Science and Technology, Sao Paulo State University (UNESP), Presidente Prudente, Sao Paulo, Brazil.

Background: Impaired knee extension biomechanics and spinal excitability have been reported in women with patellofemoral pain, but their relationship has not been explored. A significant relationship between them could indicate the need for investigating the potential benefits of disinhibitory interventions for women with patellofemoral pain. Thus, this study aimed to investigate the relationship between vastus medialis Hoffmann reflex and (1) maximal isometric, concentric and eccentric knee extensor strength and rate of torque development; (2) knee extensor torque steadiness; and (3) knee extensor moment during functional tasks; in women with patellofemoral pain. Read More

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January 2022

Analgesic use in adolescents with patellofemoral pain or Osgood-Schlatter Disease: a secondary cross-sectional analysis of 323 subjects.

Scand J Pain 2021 Dec 3. Epub 2021 Dec 3.

Center for General Practice at Aalborg University, Aalborg, Denmark.

Objectives: The prevalence of pain medication use for adolescent knee pain and factors associated with use are not well understood. This study aimed to determine the self-reported use of pain medication for knee pain and identify factors associated with use in adolescents (age 10-19) with longstanding knee symptoms.

Methods: In this exploratory cross-sectional study, we performed a secondary analysis of data previously collected in 323 adolescents with longstanding knee pain. Read More

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December 2021

Effects of tibiofemoral mobilization in patients of Patellofemoral pain syndrome.

J Pak Med Assoc 2021 Nov;71(11):2506-2510

Department of Riphah College of Rehabilitation and Allied Health Sciences, Riphah International University, Islamabad, Pakistan.

Objective: To determine the effects of tibiofemoral joint mobilisation on pain and range of motion in patients with patellofemoral pain syndrome.

Methods: The randomised control trial was conducted at the Lady Reading Hospital and Hayatabad Medical Complex, Peshawar, Pakistan, from July to December 2019, and comprised patellofemoral pain syndrome patients of either gender aged 25-35 years with anterior knee pain for at least one month. The subjects were randomly allocated control group A and experimental group B. Read More

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November 2021

Electromyographic comparison of vastus medialis obliquus facilitatory versus vastus lateralis inhibitory kinesio taping in athletes with patellofemoral pain: A randomized clinical trial.

J Bodyw Mov Ther 2021 10 10;28:157-163. Epub 2021 Aug 10.

Rehabilitation Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; Department of Physical Therapy, School of Rehabilitation Sciences, Shiraz University of Medical Sciences, Shiraz, Iran. Electronic address:

Background: Patellofemoral pain (PFP) is among the most common orthopedic complications afflicting active young people. Diminished coordination of the vastii, delayed activation of the vastus medialis obliquus (VMO), and decreased VMO-to-vastus lateralis (VL) activity ratio are well documented as underlying causes of PFP. This study compares the effects of VMO facilitatory kinesio tape (KT) versus VL inhibitory KT on electromyographic (EMG) activity of the vastii, balance, and pain in athletes with PFP. Read More

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October 2021

The 45-second anterior knee pain provocation test: A quick test of knee pain and sporting function in 10-14-year-old adolescents with patellofemoral pain.

Phys Ther Sport 2022 Jan 4;53:28-33. Epub 2021 Nov 4.

Sports Orthopedic Research Center - Copenhagen (SORC-C), Department of Orthopaedic Surgery, Copenhagen University Hospital, Amager-Hvidovre, Denmark.

Objective: To test 1) if the 45-second Anterior Knee Pain Provocation Test (AKPP-test) could differentiate between adolescents with patellofemoral pain (PFP) and pain-free controls and; 2) whether improvements in the AKPP-test over 12 weeks were associated with improvements in self-reported knee function and pain.

Design: Prospective cohort.

Patients: 151 with PFP and 50 pain-free controls (age 10-14 years). Read More

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January 2022

Patellofemoral kinematics in patellofemoral pain syndrome: The influence of demographic factors.

J Biomech 2022 01 15;130:110819. Epub 2021 Oct 15.

Department of Rehabilitation Medicine, National Institutes of Health, Bethesda, MD, USA. Electronic address:

Due to the multifactorial nature of patellofemoral pain, it is often difficult to identify an individual patient's exact cause of pain. Understanding how demographic variability influences these various factors will support improved consensus in regards to the etiology of PF pain. Thus, in this retrospective study, we tested the hypothesis that sex, height, weight, body mass index (BMI), and age influence the determination of between-groups differences in PF kinematics. Read More

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January 2022

The effects of progressive neuromuscular exercise program and taping on muscle strength and pain in patellofemoral pain. A randomized controlled blind study.

Somatosens Mot Res 2022 03 29;39(1):39-45. Epub 2021 Oct 29.

Faculty of Physiotherapy and Rehabilitation, Hacettepe University, Ankara, Turkey.

Purpose: To investigate the effects of corrective kinesio taping applied on patellofemoral and foot joint in addition to a progressive neuromuscular exercise program in women with Patellofemoral Pain (PFP) on knee pain and muscle strength.

Methods: Thirty females (20-45 years), diagnosed with unilateral PFP were randomly divided into two groups: the exercise ( = 15) and the exercise and taping ( = 15). Both groups performed three-stage progressive neuromuscular exercises for 12 weeks as home exercises. Read More

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Physical Examination and Patellofemoral Pain Syndrome: an Updated Review.

Curr Rev Musculoskelet Med 2021 Dec 29;14(6):406-412. Epub 2021 Oct 29.

Department of Orthopaedic Surgery, Stanford University School of Medicine, Stanford, CA, USA.

Purpose Of Review: Patellofemoral pain syndrome (PFPS) accounts for 25 to 40% of all knee disorders. Diagnosis of PFPS is primarily based on history and physical examination, but the findings on physical examination are often subtle and do not consistently correlate with symptoms described. Yoon and Fredericson published a review article in 2006 detailing the physical examination maneuvers most frequently used to assist clinicians in the accurate diagnosis and treatment of PFPS, and our aim in this review is to provide an update on this previous article focusing on the literature published over the past 15 years regarding the topic. Read More

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December 2021

Local neuromuscular characteristics associated with patellofemoral pain: A systematic review and meta-analysis.

Clin Biomech (Bristol, Avon) 2021 12 6;90:105509. Epub 2021 Oct 6.

Sports and Exercise Medicine, Queen Mary, University of London, London, United Kingdom; Pure Sports Medicine, London, UK.

Background: Local neuromuscular deficits have been reported in people with patellofemoral pain. We synthesised the neuromuscular characteristics associated with patellofemoral pain to help identify interventional targets and potential mechanisms.

Methods: Five databases were searched for local neuromuscular characteristics in case-control studies. Read More

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December 2021

Comparison of mobilization with movement and Mulligan knee taping on Patellofemoral pain syndrome.

J Pak Med Assoc 2021 Sep;71(9):2119-2123

Department of Rehabilitation and Allied Health Sciences, Riphah International University, Islamabad, Pakistan.

Objective: To compare the effect of mobilisation with movement and Mulligan knee taping on anterior knee pain, hamstring flexibility and physical performance of the lower limb.

Methods: The randomised controlled trial was conducted from July to December, 2019, at the physical therapy department of Sahat Clinic, Rawalpindi, Pakistan, and comprise participants of both genders having patellofemoral pain who were randomised into mobilisation with movement group A and Mulligan knee taping group B. Both the groups were treated for 2 days per week for 2 consecutive weeks. Read More

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September 2021

Adolescents and adults with patellofemoral pain exhibit distinct patellar maltracking patterns.

Clin Biomech (Bristol, Avon) 2021 12 10;90:105481. Epub 2021 Sep 10.

Department of Rehabilitation Medicine, NIH, Bethesda, MD, USA. Electronic address:

Background: Chronic idiopathic patellofemoral pain is associated with patellar maltracking in both adolescents and adults. To accurately target the underlying, patient-specific etiology, it is crucial we understand if age-of-pain-onset influences maltracking.

Methods: Twenty adolescents (13. Read More

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December 2021

Kinematic and Coordination Variability in Individuals With Acute and Chronic Patellofemoral Pain.

J Appl Biomech 2021 10 21;37(5):463-470. Epub 2021 Sep 21.

Deakin University.

Altered gait variability occurs in those with patellofemoral pain and may be relevant to pain progression. We examined gait kinematic and coordination variability between individuals with acute and chronic patellofemoral pain and healthy controls. Eighty-three patellofemoral pain runners (37 men and 46 women) and 142 healthy controls (52 men and 90 women) ran on a treadmill while 3-dimensional lower limb kinematic data were collected. Read More

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October 2021

Prevalence of Trochlear Dysplasia and Associations with Patellofemoral Pain and Instability in a Skeletally Mature Population.

J Bone Joint Surg Am 2021 11;103(22):2126-2132

Rady Children's Hospital, San Diego, California.

Background: Patellar instability among adolescents has an incidence of 29 to 43 per 100,000 per year. Trochlear dysplasia has been found in up to 85% of those with recurrent patellar instability. The prevalence of trochlear dysplasia in the general population has not yet been defined. Read More

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November 2021

Knee proprioceptive function and physical performance of patients with patellofemoral pain: A matched case-control study.

Knee 2021 Dec 17;33:49-57. Epub 2021 Sep 17.

Rehabilitation Science Postgraduation Progam - Augusto Motta University Centre (UNISUAM), Rio de Janeiro, Brazil; Physiotherapy Department - Federal Institute of Rio de Janeiro (IFRJ), Rio de Janeiro, Brazil. Electronic address:

Background: Patients with patellofemoral pain (PFP) present pain, functional limitation, and alteration in knee proprioception.

Purpose: To compare the knee joint position sense and lower extremity functionality between patients with PFP and controls. Secondarily, investigate the relationship between proprioceptive acuity and physical performance. Read More

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December 2021

Revision surgery for failed medial patellofemoral ligament reconstruction results in better disease-specific outcome scores when performed for recurrent instability than for patellofemoral pain or limited range of motion.

Knee Surg Sports Traumatol Arthrosc 2022 May 7;30(5):1718-1724. Epub 2021 Sep 7.

Arcus Sportklinik, Pforzheim, Germany.

Purpose: Medial patellofemoral ligament reconstruction (MPFL-R) is an important treatment for recurrent patellar instability. Although complications such as redislocation, patellofemoral pain (PFP) and restricted knee range of motion have been reported, few studies have investigated the results of revision surgery for failed MPFL-R. Thus, the aim of this study was to determine the results of the tailored revision surgery after considering the cause of the reconstruction failure. Read More

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