5,844 results match your criteria Patellofemoral Syndrome


Squatting versus squatting with hip adduction in management of patellofemoral osteoarthritis: A randomized controlled trial.

J Back Musculoskelet Rehabil 2018 Nov 23. Epub 2018 Nov 23.

Department of Physical Therapy, Faculty of Health Sciences, Beirut Arab University, Beirut, Lebanon.

Background: Patellofemoral osteoarthritis is a common presentation in the outpatients' physical therapy clinics. The muscle imbalance between the vastus medialis oblique and vastus lateralis muscles is one of the main factors that lead to the development of this condition.

Objective: To compare the effect of a squatting versus squatting with hip adduction in management of patellofemoral osteoarthritis. Read More

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November 2018
1 Read

Persistent morbidity after Medial Patellofemoral Ligament Reconstruction - A registry study with an eight-year follow-up on a nationwide cohort from 1996 to 2014.

Knee 2018 Nov 28. Epub 2018 Nov 28.

Dept. of Orthopedic Surgery, Clinical Orthopedic Research Hvidovre (CORH), Copenhagen University Hospital Hvidovre, Denmark. Electronic address:

Background: To evaluate the trends in treatment of patellar dislocation in the Danish population as a whole from 1996 to 2014 and evaluate the incidence of persistent morbidity after Medial Patellofemoral Ligament Reconstruction (MPFL-R).

Methods: This epidemiological study was performed by retrospectively searching the Danish National Patients Registry from 1996 to 2014. The study investigated the trends in surgery performed on patients with patellar dislocations and the risk of persistent patellar morbidity (PPM) with an eight-year follow-up. Read More

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November 2018

CORR Insights®: What Is the Risk of Repeat Revision When Patellofemoral Replacement Is Revised to TKA? An Analysis of 482 Cases From a Large National Arthroplasty Registry.

Clin Orthop Relat Res 2018 Nov 27. Epub 2018 Nov 27.

B. R. Hallstrom, Clinical Associate Professor, Department of Orthopaedic Surgery, University of Michigan Health System, Ann Arbor, MI, USA.

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November 2018
2 Reads

First tribological assessment of retrieved Oxinium patellofemoral prostheses.

J Mech Behav Biomed Mater 2018 Nov 20;90:665-672. Epub 2018 Nov 20.

School of Engineering, Newcastle University, NE1 7RU Newcastle upon Tyne, England, UK.

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November 2018

Effects of whole body vibration training on isokinetic muscular performance, pain, function, and quality of life in female patients with patellofemoral pain: a randomized controlled trial.

J Musculoskelet Neuronal Interact 2018 Dec;18(4):473-484

Physical Medicine and Rehabilitation Clinic, Kahta State Hospital, Kahta, Adıyaman, Turkey.

Objectives: To investigate the effects of whole body vibration (WBV) training on isokinetic muscular performance, pain, function, and quality of life in patients with patellofemoral pain (PFP).

Methods: Forty women with PFP were included in this study and assigned to either a WBV group that received WBV training plus home exercise or a control group that performed home exercise only. A supervised WBV training was performed in 24 sessions on a synchronous vertical vibration platform three times a week for eight weeks. Read More

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December 2018

The association of frontal plane alignment to MRI-defined worsening of patellofemoral osteoarthritis: The MOST study.

Osteoarthritis Cartilage 2018 Nov 27. Epub 2018 Nov 27.

Department of Physical Therapy, Movement and Rehabilitation Sciences, Northeastern University, Boston, MA, USA; Department of Physical Therapy, University of Delaware, Newark, USA. Electronic address:

Objective: To determine the sex-specific relation of frontal plane alignment (FPA) to MRI-defined features of patellofemoral osteoarthritis, and also to tibiofemoral osteoarthritis and knee pain.

Method: The Multicenter Osteoarthritis Study is cohort study comprised of individuals with or at risk of knee osteoarthritis. We determined the sex-specific dose-response relation of baseline FPA to MRI-defined patellofemoral and tibiofemoral structural worsening, and incident knee pain, over seven years. Read More

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November 2018
1 Read

The influence of compressive forces across the patellofemoral joint on patient-reported outcome after bi-cruciate stabilized total knee arthroplasty.

Bone Joint J 2018 Dec;100-B(12):1585-1591

Department of Orthopedic Surgery (Ohashi), Toho University School of Medicine, Tokyo, Japan.

Aims: Patellofemoral problems are a common complication of total knee arthroplasty. A high compressive force across the patellofemoral joint may affect patient-reported outcome. However, the relationship between patient-reported outcome and the intraoperative patellofemoral contact force has not been investigated. Read More

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December 2018
1 Read

Trochleoplasty provides good clinical outcomes and an acceptable complication profile in both short and long-term follow-up.

Knee Surg Sports Traumatol Arthrosc 2018 Nov 29. Epub 2018 Nov 29.

Division of Orthopaedic Surgery, Department Surgery, McMaster University, Hamilton, ON, Canada.

Purpose: The purpose of this study is to report on the global distribution and clinical outcomes of published articles related to trochleoplasty.

Methods: The online databases OVID Medline, OVID EMBASE, and the Cochrane Library were searched for the literature assessing trochleoplasty performed for lateral patellofemoral instability (LPI). Study data were abstracted looking at global trends in the literature, as well as clinical and patient-reported outcomes following this technique. Read More

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November 2018

Recurrence of Patellar Instability in Adolescents Undergoing Surgery for Osteochondral Defects Without Concomitant Ligament Reconstruction.

Am J Sports Med 2018 Nov 28:363546518808486. Epub 2018 Nov 28.

Department of Orthopedic Surgery, University of California, San Diego, California, USA.

Background:: First-time patellar dislocation with an associated chondral or osteochondral loose body is typically treated operatively to address the loose fragment. The incidence of recurrent instability in this patient population if the medial patellofemoral ligament (MPFL) is not reconstructed is unknown.

Purpose:: To determine the recurrent instability rate in patients undergoing surgery for patellar instability with chondral or osteochondral loose bodies, as well as to identify and stratify risk factors for recurrent instability. Read More

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November 2018

Suboptimal patellofemoral alignment is associated with poor clinical outcome scores after primary total knee arthroplasty.

Arch Orthop Trauma Surg 2018 Nov 27. Epub 2018 Nov 27.

Stanford University Medical Center Outpatient Center, 450 Broadway St., M/C 6342, Redwood City, CA, 94063, USA.

Background: Proper patellofemoral alignment is an important goal in total knee arthroplasty (TKA). Acceptable patellar alignment is defined as patellar tilt less than or equal to 5° and patellar displacement less than or equal to 5 mm. Previous studies reported an incidence of post-operative patellar malalignment in TKA from 7 to 35%. Read More

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November 2018

Lateral retinacular release is not recommended in association to MPFL reconstruction in recurrent patellar dislocation.

Knee Surg Sports Traumatol Arthrosc 2018 Nov 27. Epub 2018 Nov 27.

FIFA Medical Center of Excellence, Orthopaedics Surgery and Sports Medicine Department, Croix Rousse Hospital, Civil Hospices of Lyon, 103 Boulevard de la Croix Rousse, 69004, Lyon, France.

Purpose: Reconstruction of the medial patellofemoral ligament (MPFL) has become the gold standard for the treatment of the recurrent patellar dislocation (RPD). Lateral retinacular release can be performed in association with MPFL reconstruction, but the effect on outcomes is not clear. To evaluate the effect of lateral release on outcomes following MPFL reconstruction is the aim of this study. Read More

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November 2018

Alterations in energy consumption and plantar pressure distribution during walking in young adults with patellofemoral pain syndrome.

Acta Orthop Traumatol Turc 2018 Oct 25. Epub 2018 Oct 25.

Mersin University, School of Medicine, Department of Orthopedics and Traumatology, Mersin, Turkey.

Objective: The aim of this study was to determine the alterations of walking energy expenditure and plantar pressure distribution in young adults with patellofemoral pain syndrome (PFPS).

Methods: Thirty five individuals (mean age: 21.31 ± 1. Read More

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October 2018
1 Read

Blood Flow-Restricted Training for Lower Extremity Muscle Weakness due to Knee Pathology: A Systematic Review.

Sports Health 2018 Nov 26:1941738118811337. Epub 2018 Nov 26.

Cincinnati Sportsmedicine and Orthopaedic Center-Mercy Health and the Noyes Knee Institute, Cincinnati, OH, USA.

Context:: Blood flow-restricted training (BFRT) has been suggested to treat lower extremity muscle weakness. The efficacy of BFRT for muscle problems related to knee pathology is unclear.

Objective:: To determine whether BFRT (1) improves muscle strength and cross-sectional area (CSA) for chronic knee-related lower extremity atrophy and (2) prevents muscle atrophy after knee surgery. Read More

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November 2018
2 Reads

Measuring Tibial Component Rotation Following Total Knee Arthroplasty: What Is the Best Method?

J Arthroplasty 2018 Oct 27. Epub 2018 Oct 27.

Department of Orthopaedic Surgery, Mayo Clinic, Phoenix, AZ.

Background: Tibial component malrotation is associated with pain, stiffness, and altered patellofemoral kinematics in total knee arthroplasty (TKA). However, measuring tibial component rotation following TKA is difficult. Proposed protocols utilizing computed tomography (CT) lack validity and can be time-consuming. Read More

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October 2018

Trunk postural control during unstable sitting differs between patients with patellofemoral pain syndrome and healthy people: A cross-sectional study.

Knee 2018 Nov 21. Epub 2018 Nov 21.

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

Background: Patellofemoral pain syndrome (PFPS) is a common orthopedic problem with a high prevalence among young women. Patients with PFPS have altered trunk muscle activity, impaired postural control and greater displacement of the center of pressure (COP) while standing. Training in unstable sitting, by putting more emphasis on trunk sensory receptors, may improve trunk proprioception by minimizing the role of the lower extremities. Read More

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November 2018
1 Read

Clinically measured hip muscle capacity deficits in people with patellofemoral pain.

Phys Ther Sport 2018 Nov 11;35:69-74. Epub 2018 Nov 11.

Sport and Exercise Medicine Research Centre, School of Allied Health, La Trobe University, Melbourne, Australia; Department of Surgery, St Vincent's Hospital, University of Melbourne, Australia.

Objective: To evaluate differences in clinical measures of hip abductor and extensor capacity (strength, endurance and power) in people with patellofemoral pain (PFP) compared to asymptomatic controls.

Design: Cross-sectional.

Settings: Laboratory. Read More

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November 2018
8 Reads

Correction to: Recognition of evolving medial patellofemoral anatomy provides insight for reconstruction.

Knee Surg Sports Traumatol Arthrosc 2018 Nov 23. Epub 2018 Nov 23.

Orthopedic Associates of Hartford, Farmington, CT, USA.

Unfortunately, the middle name of author was incorrectly published as Jorge A. Chahla instead of Jorge Chahla in the original article. Read More

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November 2018
1 Read

A new classification of injury patterns of the medial patellofemoral ligament after acute lateral patella dislocation detected using magnetic resonance imaging studies.

Injury 2018 Nov 13. Epub 2018 Nov 13.

Department of Magnetic Resonance, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, Hubei, PR China. Electronic address:

Introduction: Acute lateral patellar dislocation is a very common condition in orthopedics, especially among adolescents and physically active patients. To evaluate distinct medial patellofemoral ligament (MPFL) injury patterns and the associated knee pathology after acute lateral patellar dislocation (ALPD) using magnetic resonance imaging (MRI) studies, which is essential for the development of treatment protocols.

Materials And Methods: MRI images of 74 ALPD patients were taken between January 2015 to December 2016. Read More

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November 2018
1 Read

Gait-training devices in the treatment of lower extremity injuries in sports medicine: current status and future prospects.

Expert Rev Med Devices 2018 Nov 22. Epub 2018 Nov 22.

a University of Virginia - Kinesiology , 210 Emmet Street South Box 400407, Charlottesville , Virginia 22904 , United States.

Introduction: This review seeks to provide synthesized information on gait-training techniques and devices applied, in four of the most prevalent chronic lower extremity injuries seen in sports medicine. Areas Covered: Comprehensive searches were performed in CINAHL and PubMed databases in April 2018 to identify gait-training articles in Chronic Ankle Instability (CAI), Exercise-Related Lower Leg Pain (ERLLP), Patellofemoral Pain (PFP), and Anterior Cruciate Ligament with Reconstruction (ACLR) populations. An investigator reviewed the articles and extracted data including study demographics, gait-training techniques, devices used, and primary gait-training outcomes. Read More

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November 2018
2 Reads

Short-Term Results of Hybrid Closed-Wedge High Tibial Osteotomy: A Case Series with a Minimum 3-Year Follow-up.

Knee Surg Relat Res 2018 Dec;30(4):293-302

Department of Orthopedic Surgery, Akita University Graduate School of Medicine, Akita, Japan.

Purpose: High tibial valgus osteotomy (HTO) is a well-established surgical procedure for patients with medial compartment osteoarthritis (OA) of the knee. The hybrid closed-wedge HTO (CWHTO) procedure permits extensive correction in patients with severe deformities or patellofemoral joint OA. The aim of this study was to report the short-term results in a consecutive series of patients treated with hybrid CWHTO. Read More

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December 2018
7 Reads

Surgical medial patellofemoral ligament reconstruction versus non-surgical treatment of acute primary patellar dislocation: a prospective controlled trial.

Int Orthop 2018 Nov 20. Epub 2018 Nov 20.

Department of Orthopedics, Third Hospital of Hebei Medical University, 139 Ziqiang Road, Shijiazhuang, 050051, Hebei, China.

Purpose: The acute primary (first-time) lateral patellar dislocation is associated with a high rate of functional disability. There is no consensus as to the choice of surgical or non-surgical treatment for these patients. The aim of this study is to compare the clinical results between the surgical (reconstruction of the medial patellofemoral ligament [MPFL]) and non-surgical treatments for acute primary patellar dislocations. Read More

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November 2018
11 Reads

Biomechanics and wear comparison between mechanical and kinematic alignments in total knee arthroplasty.

Proc Inst Mech Eng H 2018 Nov 21:954411918811855. Epub 2018 Nov 21.

2 State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, China.

The uses of mechanical and kinematic alignments in total knee arthroplasty are under debate in recent clinical investigations. In this study, the differences in short-term biomechanics and long-term wear volume between mechanical and kinematic alignments in total knee arthroplasty were investigated, based on a subject-specific musculoskeletal multi-body dynamics model during walking gait simulation. An increase of 8. Read More

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November 2018
3 Reads

Which treatment is most effective for patients with patellofemoral pain? A protocol for a living systematic review including network meta-analysis.

BMJ Open 2018 Nov 18;8(11):e022920. Epub 2018 Nov 18.

Research Unit for General Practice in Aalborg, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark.

Introduction: Patellofemoral pain (PFP) affects 1 in every 14 adults. Many treatments for PFP have been evaluated, but the comparative effectiveness of all available treatments has never been examined. Network meta-analysis is the only design to study the comparative effectiveness of all available treatments in one synthesis. Read More

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November 2018
6 Reads

Quadriceps architecture in individuals with patellofemoral pain: a systematic review protocol.

JBI Database System Rev Implement Rep 2018 Nov 16. Epub 2018 Nov 16.

Research Center for Evidence Based Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.

Review Question: The question of this review is: are there differences in quadriceps architectural parameters between healthy individuals and those with patellofemoral pain? Read More

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November 2018
2 Reads

Patellofemoral joint stress measured across three different running techniques.

Gait Posture 2018 Nov 3;68:37-43. Epub 2018 Nov 3.

Faculty of Kinesiology, University of Calgary, Calgary, Canada.

Background: Patellofemoral pain (PFP) is the most common running-related injury. It has been shown in previous studies that gait retraining may have a beneficial effect on patellofemoral joint stress (PFJS).

Research Question: Is there a reduction of PFJS across 4 running conditions: 1. Read More

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November 2018
13 Reads

Association of patella alta with worsening of patellofemoral osteoarthritis-related structural damage: data from the Osteoarthritis Initiative.

Osteoarthritis Cartilage 2018 Nov 14. Epub 2018 Nov 14.

Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA.

Objectives: To determine the association between Insall-Salvati ratio (ISR), a measure of patella alta, and worsening of Magnetic Resonance Imaging (MRI)-based osteoarthritis (OA)-related patellofemoral joint structural damages over 24-month in participants of the Osteoarthritis Initiative (OAI).

Design: Using weighted random sampling method, we selected a sample of 500 knees (from 1,677 knees with available baseline and 24-months MRI OA Knee Score (MOAKS) measurements), which is OAI-representative regarding knee OA-related factors (i.e. Read More

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November 2018
3 Reads

Application of the Chinese Aircraft-shaped Sleeve system in the treatment of tibial shaft fractures using a suprapatellar approach for tibial intramedullary nailing: a randomised controlled trial.

J Orthop Surg Res 2018 Nov 14;13(1):286. Epub 2018 Nov 14.

Department of Orthopaedics, the Second Affiliated Hospital of Soochow University, 1055 Sanxiang Road, Suzhou, 215004, Jiangsu, China.

Background: The use of the suprapatellar approach for intramedullary nailing has recently become popular for the treatment of tibial fractures. This study aimed to investigate the effectiveness of using the Chinese Aircraft-shaped Sleeve (CASS) system on the clinical outcomes of tibial intermedullary nailing using a suprapatellar approach for the treatment of tibial fractures in a cohort of adult Chinese patients.

Methods: Magnetic resonance images (MRI) of the knee joints of 212 healthy adults with normal lower limb function from May 2011 to May 2015 were obtained from a level I Chinese regional trauma centre. Read More

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November 2018
4 Reads

Patellar Tendon-Lateral Trochlear Ridge Distance: A Novel Measurement of Patellofemoral Instability.

Am J Sports Med 2018 Dec 14;46(14):3400-3406. Epub 2018 Nov 14.

Division of Orthopaedics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.

Background:: Abnormalities in the trochlea-patella-tibia relationship have been shown to be risk factors for recurrent patellofemoral instability, although no current measurements quantify patellar containment in the trochlea. Standard measurements, such as tibial tubercle-trochlear groove (TT-TG) distance, do not account for the containment of the patella by the trochlea. Our goal was to develop a measurement to assess how well the trochlea contained the extensor mechanism. Read More

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December 2018

Ultrasonographic assessment of articular cartilage of the femoral condyle in patients with an increased Q-angle.

J Ultrason 2018 ;18(74):181-185

Department of Paralympics Sport, Department of Sport Science, University of Physical Education in Wroclaw, Wroclaw, Poland.

Introduction: The patella is a sesamoid for the quadriceps, which increases its power during knee extension and thus transfers considerable forces. The etiology of patellofemoral pain is multifactorial. In the absence of injury, the commonly accepted hypothesis is associated with increased compression of articulating surfaces. Read More

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January 2018
4 Reads

Manifestations of Pain Sensitization Across Different Painful Knee Disorders: A Systematic Review Including Meta-analysis and Metaregression.

Pain Med 2018 Nov 13. Epub 2018 Nov 13.

La Trobe Sport and Exercise Medicine Research Centre (LASEM), School of Allied Health, College of Science, Health and Engineering, La Trobe University, Bundoora, Australia.

Objectives: Previous reviews have reported that manifestations of pain sensitization may play an important role in the pain experienced by people with knee osteoarthritis. However, it is unknown if manifestations of pain sensitization are common features across other painful knee disorders or if sensitization requires targeted intervention. This review aims to synthesize the published research investigating manifestations of pain sensitization in painful knee disorders and to evaluate if the manifestations of pain sensitization change in response to treatment. Read More

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November 2018
6 Reads

Increased Patellar Volume/Width and Decreased Femoral Trochlear Width Are Associated With Adolescent Patellofemoral Pain.

Clin Orthop Relat Res 2018 Dec;476(12):2334-2343

R. M. Smith. F. T. Sheehan, Functional and Applied Biomechanics, Department of Rehabilitation Medicine, National Institutes of Health, Bethesda, MD, USA B. P. Boden MD, The Orthopaedic Center, Rockville, MD, USA.

Background: Patellofemoral pain is one of the most common forms of knee arthralgia in adolescent females. Unlike in adults, in whom the etiology of patellofemoral pain is considered to be multifactorial (eg, altered bone shape and musculoskeletal dynamics), the etiology of adolescent patellofemoral pain has been historically attributed to overuse. Although it is highly plausible that adolescent patellofemoral pain results from excessive maltracking, as suggested by recent research, an increase in patellar, relative to femoral, size could also contribute to patellofemoral pain through altered cartilage stresses/strains, resulting in overloading of the subchondral bone. Read More

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December 2018
3 Reads

Kinematic alignment in total knee arthroplasty leads to a better restoration of patellar kinematics compared to mechanic alignment.

Knee Surg Sports Traumatol Arthrosc 2018 Nov 12. Epub 2018 Nov 12.

Department of Orthopaedic Surgery, University of Regensburg, Kaiser-Karl-V Allee 3, 93077, Bad Abbach, Germany.

Purpose: The influence of different implantation techniques in TKA on tibiofemoral kinematics was analysed in few investigations so far. However, the influence on patellar kinematics remain unclear. The aim of the present investigation was to compare patellar kinematics of the natural knee with those of knees after both kinematically and mechanically aligned TKAs. Read More

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November 2018
2 Reads

Reconstruction of the medial patellofemoral ligament and reinforcement of the medial patellotibial ligament is an effective treatment for patellofemoral instability with patella alta.

Knee Surg Sports Traumatol Arthrosc 2018 Nov 12. Epub 2018 Nov 12.

Department of Orthopedics, The General Hospital of Chinese People's Liberation Army, 28 Fuxing Road, Haidian District, Beijing, 100853, China.

Purpose: To evaluate the clinical outcome of the combined reconstruction of the medial patellofemoral ligament (MPFL) and medial patellotibial ligament (MPTL) for patellar instability with patella alta.

Methods: A total of 108 patients underwent a combined reconstruction of the MPFL and MPTL, and 58 patients were included in this study. The clinical results were evaluated and compared using the International Knee Documentation Committee (IKDC) scores, Kujala scores, and visual analogue scale (VAS) scores. Read More

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November 2018
3 Reads

Clinic-Based Patellar Mobilization Therapy for Knee Osteoarthritis: A Randomized Clinical Trial.

Ann Fam Med 2018 Nov;16(6):521-529

The School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong.

Purpose: We performed a phase 2 randomized clinical trial to evaluate the preliminary effectiveness of a clinic-based patellar mobilization therapy (PMT) in patients with knee osteoarthritis.

Methods: We recruited 208 patients with knee osteoarthritis at primary care clinics in Hong Kong. Patients were randomly assigned (1:1) to the intervention group or the control group. Read More

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November 2018
5 Reads
5.430 Impact Factor

Evaluation of normal tibial tubercle to trochlear groove distance in adult Turkish population.

Niger J Clin Pract 2018 Nov;21(11):1403-1407

Department of Anatomy, School of Medicine, Necmettin Erbakan University Meram, Konya, Turkey.

Purpose: Many studies have confirmed the significance of tibial tuberosity-trochlear groove (TTTG) distance measurement for the preoperative assessment of tibial tubercle osteotomy and refixation of the patients that need surgery. TTTG distance is being used as threshold value for surgery decision. The purpose is to determine the TTTG values for the adult Turkish population and compare this with the values of other studies and establish a possible index. Read More

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November 2018
4 Reads

Changes in knee extensor strengths before and after medial patellofemoral ligament reconstruction.

Phys Sportsmed 2018 Nov 10. Epub 2018 Nov 10.

a Department of Orthopaedic Surgery , Kobe University Graduate School of Medicine , Kobe , Japan.

Objective: Quadriceps dysfunction has been suggested as a complication after medial patellofemoral ligament (MPFL) reconstruction. The purpose of this study was to investigate changes in knee extensor strength before and after MPFL reconstruction.

Methods: Twenty patients who underwent MPFL reconstruction for unilateral recurrent patellar dislocation (18 females and 2 males; mean age 20. Read More

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November 2018

Histopathological changes in the infrapatellar fat pad in an experimental rabbit model of early patellofemoral osteoarthritis.

Knee 2018 Nov 8. Epub 2018 Nov 8.

Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, China; Department of Orthopedic Surgery, The Affiliated Hospital of North China University of Science and Technology, Tangshan, China. Electronic address:

Background: The purpose of this study was to characterise the histopathological changes in the infrapatellar fat pad (IPFP) in the early stage of patellofemoral osteoarthritis (PFOA).

Methods: Sixty-four New Zealand white rabbits were randomly divided into experimental (n = 24), sham (n = 16), and control groups (n = 24). In the experimental group, denoted as the patellar ligament uneven shortening group (US group), the patellar ligament (PL) was folded eight millimetres and sutured. Read More

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November 2018

Prevalence of excessive lateral pressure syndrome in varus osteoarthritic candidates for high tibial osteotomy.

Knee 2018 Dec 8;25(6):1192-1196. Epub 2018 Nov 8.

Department of Physical Medicine and Rehabilitation, College of Medicine, Kyung Hee University, Seoul, South Korea.

Background: This study aimed to determine the prevalence of excessive lateral pressure syndrome (ELPS) in potential candidates for high tibial osteotomy (HTO) using single-photon emission computed tomography-computed tomography (SPECT-CT). We also sought to identify risk factors related to the presence of ELPS.

Methods: This retrospective study included 150 patients (216 knees) who were candidates for HTO from an initial screening of 3579 patients (7158 knees). Read More

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December 2018
5 Reads

Distinct patterns of variation in the distribution of knee pain.

Sci Rep 2018 Nov 8;8(1):16522. Epub 2018 Nov 8.

Research Unit for General Practice in Aalborg, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark.

The patient's expression of pain using digital-body maps expands analytic opportunities for exploring the spatial variation of bodily pain. A common knee pain condition in adolescents and adults is patellofemoral pain (PFP) and recently PFP was shown to be characterized by a heterogeneous distribution of pain. Whether there are important patterns in these distributions remains unclear. Read More

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November 2018
3 Reads
5.080 Impact Factor

Evaluation of the patellofemoral joint in total knee arthroplasty: Validation of the weight bearing merchant radiographic view.

Knee 2018 Dec 5;25(6):1262-1271. Epub 2018 Nov 5.

Sydney Knee Specialists, St George Private Hospital, Kogarah, NSW 2217, Australia. Electronic address:

Background: Standard radiographic views for patellofemoral joint assessment do not reflect loading at which TKA patients may describe post-operative anterior symptoms. A novel weight bearing (WB) Merchant view has been described and demonstrated a number of tracking changes that correlated with clinical outcomes. In this study, we aim to validate the WB Merchant view and assess relationships with patient outcome scores. Read More

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December 2018
6 Reads

Kinesiophobia, but not strength is associated with altered movement in women with patellofemoral pain.

Gait Posture 2018 Nov 1;68:1-5. Epub 2018 Nov 1.

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

Background: Evidence indicates the presence of both kinesiophobia and knee extension strength deficits in women with patellofemoral pain (PFP). Both impairments may contribute to apparent compensatory gait patterns including reduced cadence and peak knee flexion during stair negotiation.

Research Question: Is kinesiophobia or knee extension strength associated with movement pattern in women with patellofemoral pain?

Methods: Forty women with PFP were assessed with three-dimensional kinematic analyses during stair descent; isokinetic dynamometry of the knee extensors (isometric, concentric and eccentric); and the Tampa scale for kinesiophobia. Read More

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November 2018
14 Reads

The Young Injured Gymnast: A Literature Review and Discussion.

Curr Sports Med Rep 2018 Nov;17(11):366-375

Division of Sports Medicine, Department of Orthopaedics, Boston Children's Hospital; Harvard Medical School, Boston, MA; The Micheli Center for Sports Injury Prevention, Waltham, MA.

Gymnastics is a sport requiring grace, strength, and flexibility, resulting in a wide variety of injuries. This article is an overview of the sport of gymnastics and associated injury trends in the artistic gymnastics population. Injury rates in gymnastics range from 1. Read More

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November 2018
1 Read

Is femoral trochlear dysplasia related to global joint hypermobility?

J Orthop Sci 2018 Nov 2. Epub 2018 Nov 2.

Bezmialem Vakif University Medical School, Department of Orthopaedics and Traumatology, Istanbul, Turkey. Electronic address:

Background: Hypermobility is a known risk factor for patellar instability. In this study, we hypothesized that a significant relationship exists between global joint hypermobility and trochlear dysplasia.

Methods: Follow-up patients from the shoulder department of our institution with global joint hypermobility (Group 1, n = 42) and healthy volunteers (Group 2, n = 42) without known knee complaints were included in our study. Read More

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November 2018
5 Reads

The Evolution of Patellofemoral Instability Surgery During the Past 25 Years.

Sports Med Arthrosc Rev 2018 Dec;26(4):157-159

Department of Orthopaedic Surgery, The Johns Hopkins Hospital, Baltimore, MD.

Surgical treatment of patellofemoral instability has evolved during the past 25 years as we developed a better appreciation of anatomy and a more sophisticated understanding of pathophysiology. Currently, most patellofemoral surgeons use soft tissue procedures like medial patellofemoral ligament reconstruction to treat medial soft tissue insufficiency and tibial tuberosity or femoral osteotomy to correct substantial bony malalignment. Advances in imaging technology and computational analysis have allowed for more precise preoperative planning and outcome modeling so that the optimum operation using ≥1 of these procedures can be designed to meet the unique needs of an individual patient. Read More

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December 2018
4 Reads

Editorial Commentary: What Is the Optimal Management of First and Recurrent Patellar Instability? Patellofemoral Instability Management Continues to Evolve.

Authors:
Jack Farr

Arthroscopy 2018 Nov;34(11):3094-3097

Greenwood, Indiana.

Patellar instability patients may present for evaluation after their first instability episode or after recurrent episodes. Current management differs for these 2 groups. The accepted "common denominator" of patellar instability is the medial patellofemoral ligament, or medial patellar restraints, to be more all-encompassing. Read More

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November 2018

Superolateral Hoffa's Fat Pad Edema and Trochlear Sulcal Angle Are Associated With Isolated Medial Patellofemoral Compartment Osteoarthritis.

Can Assoc Radiol J 2018 Nov;69(4):450-457

Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Orthopedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Genetics, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, Pennsylvania, USA. Electronic address:

Purpose: To evaluate whether mediopatellar plica and knee morphometric measurements obtained from magnetic resonance imaging (MRI) studies are associated with isolated medial patellofemoral osteoarthritis in young adults.

Methods: MRI studies from 60 patients with isolated medial patellofemoral osteoarthritis and 90 control patients with normal knee MRI studies were reviewed. The presence of mediopatellar plica, the presence of edema in the superolateral aspect of Hoffa's fat pad and suprapatellar fat pad, quadriceps and patellar tendinosis, and axial and sagittal alignment of the patellar and trochlear morphology were assessed using MRI. Read More

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November 2018
1 Read

Correction to: Femoral insertion site of the graft used to replace the medial patellofemoral ligament influences the ligament dynamic changes during knee flexion and the clinical outcome.

Knee Surg Sports Traumatol Arthrosc 2018 Nov 2. Epub 2018 Nov 2.

Department of Radiology, Hospital Universitario y Politécnico La Fe and GIBI230 IIS La Fe Research Group, Valencia, Spain.

Unfortunately, the author missed out to indicate the affiliation which is basic requirement as a part of his thesis. The affiliation is now updated here. Read More

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November 2018

Medial patellofemoral ligament (MPFL) reconstruction using quadriceps tendon autograft provides good clinical, functional and patient-reported outcome measurements (PROM): a 2-year prospective study.

Knee Surg Sports Traumatol Arthrosc 2018 Oct 29. Epub 2018 Oct 29.

Gelenkpunkt, Sports and Joint Surgery, Olympiastraße 39, 6020, Innsbruck, Austria.

Purpose: The medial patellofemoral ligament (MPFL) is the most important ligamentous stabilizer preventing lateral patella dislocation. Numerous surgical procedures for MPFL reconstruction have been described in the literature. The aim of this study was to investigate the clinical, functional and patient-reported (PROM) outcomes 2 years after minimally invasive MPFL reconstruction performed using an autologous strip of the quadriceps tendon. Read More

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October 2018
6 Reads

National Athletic Trainers' Association Position Statement: Management of Individuals With Patellofemoral Pain.

J Athl Train 2018 Sep;53(9):820-836

Department of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles.

Objective: : To present recommendations for athletic trainers and other health care providers regarding the identification of risk factors for and management of individuals with patellofemoral pain (PFP).

Background: : Patellofemoral pain is one of the most common knee diagnoses; however, this condition continues to be one of the most challenging to manage. Recent evidence has suggested that certain risk factors may contribute to the development of PFP. Read More

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September 2018
2 Reads