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Patellofemoral joint

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https://www.readbyqxmd.com/read/28730295/incarceration-of-the-medial-collateral-ligament-in-the-intercondylar-notch-following-proximal-avulsion
#1
Edward Walton, Martin Williams, James R Robinson
Intra-articular entrapment of the medial collateral ligament (MCL) is a rare but recognised complication of traumatic injury to the posteromedial corner (PMC) of the knee. Considering the MCL is the most commonly injured ligament of the knee this complication is extremely rare with only a handful of cases describing MCL entrapment following distal avulsion of the MCL. We present the first known case of MCL entrapment following proximal avulsion of the MCL and posterior oblique ligament (POL) with the mid-substance of the MCL becoming entrapped in the joint, lying on the superior surface of the medial meniscus and extending up into the intercondylar notch...
July 20, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28717066/a-heart-shaped-sleeve-simplifies-intramedullary-tibial-nail-insertion-when-using-the-suprapatellar-approach
#2
Kosuke Tajima, Chikako Shimizu, Soichiro Ohno, Yusho Nishida, Kazuhiko Udagawa, Junichi Sasaki
The suprapatellar approach for intramedullary tibial nailing has become widely accepted over the past decade. A round sleeve is passed beneath the patella to protect the surface of the patellofemoral joint (PFJ). However, the round sleeve cannot be easily stabilized in the PFJ because it does not conform to the shape of the patellar apex. Consequently, we produced a heart-shaped sleeve to simplify the insertion of the entry sleeve during the suprapatellar approach. Using the new sleeve, the following procedure is used: (1) make a longitudinal 4 cm skin incision proximal to the patella to reach the PFJ, (2) insert the guide pin manually to the ventral edge of the tibial plateau, (3) insert the cannulated trocar along the guide pin, (4) insert the heart-shaped sleeve along the cannulated trocar, (5) remove the cannulated trocar, (6) ream the entry point through the heart-shaped sleeve...
July 15, 2017: Keio Journal of Medicine
https://www.readbyqxmd.com/read/28714838/lower-extremity-muscle-activity-kinematics-and-dynamic-postural-control-in-individuals-with-patellofemoral-pain
#3
Shiho Goto, Naoko Aminaka, Phillip A Gribble
CONTEXT: Altered lower extremity muscle activity has been suggested to be associated with lower extremity kinematics in individuals with patellofemoral pain (PFP). However, few studies examined these relationships and the results are inconsistent. OBJECTIVES: To compare the lower extremity muscle activity, kinematics, pain level, and reach distance during the anterior reach of the Star Excursion Balance Test (SEBT) between participants with PFP and healthy individuals (CON)...
July 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28713612/in-vivo-magnetic-resonance-imaging-morphometry-of-the-patella-bone-in-south-indian-population
#4
Reshma Muhamed, Vasudha V Saralaya, B V Murlimanju, Ganesh Kumar Chettiar
Racial differences exist in the dimensions of structures and the commercially available prostheses are designed based on the Caucasians. In this context, the goal of the present investigation was to determine the gender wise measurements of patella bone in South Indians. The present study included axial magnetic resonance images of the knee joint from 140 South Indian adults (70 males, 70 females; aged between 20-70 years). The angle, width, thickness, lateral facet width, facet thickness, ratio of the lateral facet, the relative thickness and ratio of facet thickness were measured in the patella by using the digital ruler...
June 2017: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/28706804/tibial-tuberosity-transfer-in-combination-with-medial-patellofemoral-ligament-reconstruction-surgical-technique
#5
Damian Clark, Katie Walmsley, Peter Schranz, Vipul Mandalia
The stability of the patellofemoral joint relies on the tenuous interplay of soft tissue and bony factors. Anatomic risk factors for instability include a shallow trochlea, an abnormally lateral tibial tubercle position, patella alta, hypermobility, or a secondary injury to the medial patellofemoral ligament (MPFL). There is an increasing interest in restoring normal anatomy to achieve stability, and at times more than 1 abnormality exists. This article describes the technique for combining a tibial tuberosity transfer and an MPFL reconstruction...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28702749/evaluation-of-different-surgical-methods-in-treating-recurrent-patella-dislocation-after-three-dimensional-reconstruction
#6
Hao Du, Xiao-Xiao Tian, Fa-Qi Guo, Xiang-Ming Li, Tao-Tao Ji, Bin Li, Tong-Sen Li
PURPOSE: Recurrent patella dislocation (RPD) is the most common complication of patellar instability. The effects of different surgical techniques on the outcome of RPD treatments remain unclear. This study was conducted to compare the effects of three surgical techniques in treating RPD by three-dimensional (3D) reconstruction from computed tomography (CT) scans. METHODS: Sixty-eight patients with RPD and no previous surgical treatments who attended our hospital between October 2010 and 2013 were enrolled and randomly assigned into three groups: (1) medial patellofemoral ligament (MPFL) reconstruction and medial patellar retinaculum (MPR) plication group; (2) lateral patellar retinaculum (LPR) release and MPR plication group; and (3) MPFL reconstruction and LPR release group...
July 12, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28699710/-%C3%A2-my-joints-are-cracking-is-it-serious-doctor-%C3%A2-a-review-about-sounds-produced-by-joints
#7
Mathieu Saubade, Christos Karatzios, Emilie Léonard, Cyril Besson, Gérald Gremion, Vincent Gremeaux
The sounds produced by joints are a common source of questioning for doctors and their patients. Two major types are identified : cracks and crepitus. Few investigations have been carried out on these manifestations, while they potentially have clinical implications, especially for patellar crepitus in patellofemoral osteoarthrosis, and may generate anxiety. Knuckle cracking appears to be caused by the sudden and temporary occurrence of an intra-articular gaseous cavity, called tribonucleation. Other researches on these sounds are focused on the knees and their links with osteoarthritis, as well as on the spine...
July 12, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28696002/mitochondrial-dysfunction-is-an-acute-response-of-articular-chondrocytes-to-mechanical-injury
#8
Michelle L Delco, Edward D Bonnevie, Lawrence J Bonassar, Lisa A Fortier
Mitochondrial (MT) dysfunction is known to occur in chondrocytes isolated from end-stage osteoarthritis (OA) patients, but the role of MT dysfunction in the initiation and early pathogenesis of post-traumatic OA (PTOA) remains unclear. The objective of this study was to investigate chondrocyte MT function immediately following mechanical injury in cartilage, and to determine if the response to injury differed between a weight bearing region (medial femoral condyle; MFC) and a non-weight bearing region (distal patellofemoral groove; PFG) of the same joint...
July 11, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28666037/joint-preserving-osteotomies-for-isolated-patellofemoral-osteoarthritis-alternatives-to-arthroplasty
#9
Vicente Sanchis-Alfonso, Jason L Koh
Patellofemoral osteotomies can provide excellent symptomatic relief for selected patients with isolated patellofemoral osteoarthritis (PFOA). Isolated PFOA is a relatively common disorder, seen in 24% of women and 11% of men over the age of 55 years. In up to 89% of these patients, PFOA occurs at the lateral facet of the patella, and is especially amenable to surgical treatment. Particularly in younger patients, joint-preserving osteotomies can provide excellent and reliable relief while delaying the need for partial or joint arthroplasty and subsequent revision...
May 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28662894/medial-patellofemoral-ligament-medial-patellotibial-ligament-and-medial-patellomeniscal-ligament-anatomic-histologic-radiographic-and-biomechanical-study
#10
Betina B Hinckel, Riccardo G Gobbi, Marco K Demange, Cesar Augusto M Pereira, Jose Ricardo Pécora, Renato Jose M Natalino, Luciana Miyahira, Bruno S Kubota, Gilberto Luis Camanho
PURPOSE: To describe the anatomy (quantitative macroscopic and histologic), radiographic parameters of the insertions, and biomechanical characteristics of the medial ligamentous restrictors of the patella (medial patellofemoral ligament [MPFL], medial patellotibial ligament [MPTL], and medial patellomeniscal ligament [MPML]) in cadaveric knees. Because the MPTL and the MPML are not as well known as the MPFL, they were the focus of this study. METHODS: MPFLs, MPTLs, and MPMLs from 9 knees were dissected...
June 26, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28661229/the-influence-of-malalignment-and-ageing-following-sterilisation-by-gamma-irradiation-in-an-inert-atmosphere-on-the-wear-of-ultra-high-molecular-weight-polyethylene-in-patellofemoral-replacements
#11
Raman Maiti, Raelene M Cowie, John Fisher, Louise M Jennings
Complications of patellofemoral arthroplasty often occur soon after implantation and, as well as other factors, can be due to the design of the implant or its surgical positioning. A number of studies have previously considered the wear of ultra-high-molecular-weight polyethylene patellae following suboptimal implantation; however, studies have primarily been carried out under a limited number of degrees of freedom. The aim of this study was to develop a protocol to assess the wear of patellae under a malaligned condition in a six-axis patellofemoral joint simulator...
July 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28652829/patellofemoral-pain-in-athletes
#12
REVIEW
Wolf Petersen, Ingo Rembitzki, Christian Liebau
Patellofemoral pain (PFP) is a frequent cause of anterior knee pain in athletes, which affects patients with and without structural patellofemoral joint (PFJ) damage. Most younger patients do not have any structural changes to the PFJ, such as an increased Q angle and a cartilage damage. This clinical entity is known as patellofemoral pain syndrome (PFPS). Older patients usually present with signs of patellofemoral osteoarthritis (PFOA). A key factor in PFPS development is dynamic valgus of the lower extremity, which leads to lateral patellar maltracking...
2017: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/28648740/patellofemoral-morphology-and-alignment-reference-values-and-dose-response-patterns-for-the-relation-to-mri-features-of-patellofemoral-osteoarthritis
#13
E M Macri, D T Felson, Y Zhang, A Guermazi, F W Roemer, K M Crossley, K M Khan, J J Stefanik
OBJECTIVE: We aimed to (1) determine reference values for trochlear morphology and patellofemoral (PF) alignment in adults without magnetic resonance imaging (MRI)-defined PF full thickness cartilage damage or knee pain; and (2) evaluate dose-response patterns for these measures with prevalent MRI-defined PF structural damage and/or knee pain. DESIGN: The Framingham Community Cohort is a population-based sample of ambulatory adults aged ≥50 years. We evaluated six morphology and alignment measures using MRI (n = 985), and reported reference values (mean ± 2SD) in a subsample without MRI-defined PF full thickness cartilage damage or knee pain (n = 563)...
June 23, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28642979/-medial-opening-wedge-high-tibial-osteotomy
#14
REVIEW
P Niemeyer, A Stöhr, M Köhne, A Hochrein
OBJECTIVE: Reduction of the load to the medial compartment in patients with medial knee osteoarthritis and varus malalignment. Unloading of the posterolateral complex in varus deformity with complex ligamentous laxity. INDICATIONS: Medial knee osteoarthritis and varus malalignment with largely intact lateral and patellofemoral joint aspect. Complex ligament insufficiency combined with varus deformity. CONTRAINDICATIONS: Substantially impaired range of motion...
June 22, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28633973/patellofemoral-osteoarthritis-progression-and-alignment-changes-after-open-wedge-high-tibial-osteotomy-do-not-affect-clinical-outcomes-at-mid-term-follow-up
#15
Kenichi Goshima, Takeshi Sawaguchi, Kenji Shigemoto, Shintaro Iwai, Akira Nakanishi, Ken Ueoka
PURPOSE: To evaluate the clinical and radiological outcomes of open-wedge high tibial osteotomy (OWHTO) with respect to the patellofemoral joint and to assess whether patellofemoral osteoarthritis (OA) progression and alignment changes after OWHTO affect clinical outcomes. METHODS: Inclusion criteria were consecutive patients who underwent OWHTO from March 2005 to September 2013. Exclusion criteria were loss to follow-up within 2 years and absence of second-look arthroscopy findings at the time of plate removal...
June 17, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28631024/the-use-of-tibial-tuberosity-trochlear-groove-indices-based-on-joint-size-in-lower-limb-evaluation
#16
Peter Wilhelm Ferlic, Armin Runer, Florian Dirisamer, Peter Balcarek, Johannes Giesinger, Rainer Biedermann, Michael Christian Liebensteiner
PURPOSE: The correlation between tibial tuberosity-trochlear groove distance (TT-TG) and joint size, taking into account several different parameters of knee joint size as well as lower limb dimensions, is evaluated in order to assess whether TT-TG indices should be used in instead of absolute TT-TG values. METHODS: This study comprised a retrospective analysis of knee CT scans, including 36 cases with patellofemoral instability (PFI) and 30 controls. Besides TT-TG, five measures of knee joint size were evaluated in axial CT slices: medio-lateral femur width, antero-posterior lateral condylar height, medio-lateral width of the tibia, width of the patella and the proximal-distal joint size (TT-TE)...
June 19, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28630757/the-patellofemoral-joint-from-dysplasia-to-dislocation
#17
Stefano Zaffagnini, Alberto Grassi, Gianluca Zocco, Michele Attilo Rosa, Cecilia Signorelli, Giulio Maria Marcheggiani Muccioli
Patellofemoral dysplasia is a major predisposing factor for instability of the patellofemoral joint. However, there is no consensus as to whether patellofemoral dysplasia is genetic in origin, caused by imbalanced forces producing maltracking and remodelling of the trochlea during infancy and growth, or due to other unknown and unexplored factors.The biomechanical effects of patellofemoral dysplasia on patellar stability and on surgical procedures have not been fully investigated. Also, different anatomical and demographic risk factors have been suggested, in an attempt to identify the recurrent dislocators...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28624557/arthroscopic-lateral-retinacular-release-medial-retinacular-plication-and-partial-medial-tibial-tubercle-transfer-for-recurrent-patellar-dislocation
#18
Song Chen, Yiqin Zhou, Qirong Qian, Yuli Wu, Peiliang Fu, Haishan Wu
OBJECTIVE: To assess the efficacy of a therapeutic protocol composed of arthroscopic lateral retinacular release, medial retinacular plication, and partial medial tibial tuberosity transfer for patients with recurrent patellar dislocation. METHOD: 71 patients, 11 males and 60 females and a total of 77 knees, with recurrent dislocation of the patella were enrolled between 1998 and 2012. The average age of the patients was 19.5 years and 67 of them had previous knee trauma history...
June 15, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28620621/matrix-assisted-autologous-chondrocyte-transplantation-in-the-knee-a-systematic-review-of-mid-to-long-term-clinical-outcomes
#19
REVIEW
Hayden B Schuette, Matthew J Kraeutler, Eric C McCarty
BACKGROUND: Matrix-assisted autologous chondrocyte transplantation (MACT) is a surgical treatment option for articular cartilage lesions of the knee joint. PURPOSE: To investigate mid- to long-term clinical outcomes of MACT in the patellofemoral (PF) and tibiofemoral (TF) joints. STUDY DESIGN: Systematic review; Level of evidence, 4. METHODS: A systematic review was performed by searching PubMed, Embase, and the Cochrane Library to find studies evaluating minimum 5-year clinical outcomes of patients undergoing MACT in the knee joint...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28618872/outcomes-of-patellofemoral-osteochondral-lesions-treated-with-structural-grafts-in-patients-older-than-40-years
#20
Ryan M Degen, Nathan W Coleman, Danielle Tetreault, Brenda Chang, Greg T Mahony, Christopher L Camp, Shawn G Anthony, Riley J Williams
Background Chondral lesions in the patellofemoral compartment represent a difficult entity to treat among active patients, with no clear consensus on the optimal treatment strategy. The purpose of this study was to review the functional outcomes of patients >40 years old with primary patellofemoral osteochondral lesions who underwent a cartilage restoration procedure with a structural graft. Methods Following institutional review board approval, 35 patients >40 years treated for patellofemoral chondral or osteochondral injuries were retrospectively identified...
July 2017: Cartilage
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