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Patellofemoral

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https://www.readbyqxmd.com/read/28642979/-medial-opening-wedge-high-tibial-osteotomy
#1
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/28641970/the-interaction-of-caseload-and-usage-in-determining-outcomes-of-unicompartmental-knee-arthroplasty-a-meta-analysis
#2
Thomas W Hamilton, James M Rizkalla, Leonidas Kontochristos, Barbara E Marks, Stephen J Mellon, Christopher A F Dodd, Hemant G Pandit, David W Murray
BACKGROUND: Outcomes after unicompartmental knee arthroplasty (UKA) are variable and influenced by caseload (UKA/y) and usage (percentage of knee arthroplasty that are UKA), which relates to indications. This meta-analysis assesses the relative importance of these factors. METHODS: MEDLINE (Ovid), Embase (Ovid), and Web of Science (ISI) were searched for consecutive series of cemented Phase 3 Oxford medial UKA. The primary outcome was revision rate/100 observed component years (% pa) with subgroup analysis based on caseload and usage...
May 11, 2017: Journal of Arthroplasty
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
#3
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
#4
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
#5
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/28628800/increased-internal-femoral-torsion-can-be-regarded-as-a-risk-factor-for-patellar-instability-a-biomechanical-study
#6
Peter Kaiser, Werner Schmoelz, Philip Schoettle, Marit Zwierzina, Christian Heinrichs, Rene Attal
BACKGROUND: Increased internal femoral torsion is regarded as a risk factor for patellar instability. Biomechanical investigations confirming this hypothesis are missing. METHODS: Eight fresh-frozen cadaver knees were tested on a specially designed simulator. Patellar motion and patellofemoral pressure were evaluated for 0°, 10°, and 20° of increased internal and external femoral torsion with native and with transected medial patellofemoral ligaments used to simulate patellar instability...
June 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28624711/does-the-powers%C3%A2-strap-influence-the-lower-limb-biomechanics-during-running
#7
Henrike Greuel, Lee Herrington, Anmin Liu, Richard K Jones
Previous research has reported a prevalence of running related injuries in 25.9% to 72% of all runners. A greater hip internal rotation and adduction during the stance phase in running has been associated with many running related injuries, such as patellofemoral pain. Researchers in the USA designed a treatment device 'the Powers™ strap' to facilitate an external rotation of the femur and to thereby control abnormal hip and knee motion during leisure and sport activities. However, to date no literature exists to demonstrate whether the Powers™ strap is able to reduce hip internal rotation during running...
June 3, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28624557/arthroscopic-lateral-retinacular-release-medial-retinacular-plication-and-partial-medial-tibial-tubercle-transfer-for-recurrent-patellar-dislocation
#8
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/28624016/longitudinal-change-in-patellofemoral-cartilage-thickness-cartilage-t2-relaxation-times-and-subchondral-bone-plate-area-in-adolescent-vs-mature-athletes
#9
Adam G Culvenor, Wolfgang Wirth, Susanne Maschek, Heide Boeth, Gerd Diederichs, Georg Duda, Felix Eckstein
OBJECTIVE: Patellofemoral cartilage changes have been evaluated in knee trauma and osteoarthritis; however, little is known about changes in patellar and trochlear cartilage thickness, T2 relaxation-time and subchondral bone plate area (tAB) during growth. Our prospective study aimed to explore longitudinal change in patellofemoral cartilage thickness, T2 and tAB in adolescent athletes, and to compare these data with those of mature (i.e., adult) athletes. MATERIALS AND METHODS: 20 adolescent (age 16±1years) and 20 mature (46±5years) volleyball players were studied over 2-years (10 men and 10 women each group)...
July 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28623415/a-stand-alone-lateral-condyle-elevating-trochlear-osteotomy-leads-to-high-residual-instability-but-no-excessive-increase-in-patellofemoral-osteoarthritis-at-12-year-follow-up
#10
S Tigchelaar, J van Sambeeck, S Koeter, A van Kampen
PURPOSE AND HYPOTHESIS: Trochlear osteotomy is a rarely performed procedure, only indicated in selected cases. Due to its nature, it can potentially lead to cartilage damage and subsequent early osteoarthritis. Satisfactory short-term results from lateral condyle-elevating osteotomy have previously been reported. The long-term effects of this procedure on clinical outcomes, patellar stability and radiological osteoarthritis are reported here. METHODS: Sixteen patients (19 knees) with patellar instability due to trochlear dysplasia were included...
June 16, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28620621/matrix-assisted-autologous-chondrocyte-transplantation-in-the-knee-a-systematic-review-of-mid-to-long-term-clinical-outcomes
#11
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
#12
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
https://www.readbyqxmd.com/read/28618435/anteromedializing-tibial-tubercle-osteotomy-for-patellofemoral-instability-occupational-and-functional-outcomes-in-u-s-military-service-members
#13
Philip J Belmont, Tuesday F Fisher, Julia M Bader, Joseph T Lanzi, Brett D Owens, Brian R Waterman
No abstract text is available yet for this article.
June 15, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28617653/systematic-review-of-the-effect-of-taping-techniques-on-patellofemoral-pain-syndrome
#14
Catherine A Logan, Abhiram R Bhashyam, Ashley J Tisosky, Daniel B Haber, Anna Jorgensen, Adam Roy, Matthew T Provencher
CONTEXT: Taping is commonly used in the management of several musculoskeletal conditions, including patellofemoral pain syndrome (PFPS). Specific guidelines for taping are unknown. OBJECTIVE: To investigate the efficacy of knee taping in the management of PFPS. Our hypothesis was that tension taping and exercise would be superior to placebo taping and exercise as well as to exercise or taping alone. DATA SOURCES: The PubMed/MEDLINE, Cochrane, Rehabilitation and Sports Medicine Source, and CINAHL databases were reviewed for English-language randomized controlled trials (RCTs) evaluating the efficacy of various taping techniques that were published between 1995 and April 2015...
June 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28614283/recurrent-patellar-instability-implications-of-preoperative-patellar-crepitation-on-the-status-of-the-patellofemoral-articular-cartilage
#15
Scott J Luhmann, June C Smith, Mario Schootman, Nandan Prasad
BACKGROUND: The purpose of the study was to quantify the frequency, severity, and location of patellofemoral (PF) articular cartilage changes recurrent patellar instability treated surgically in patients with preoperative clinical patellar crepitation. METHODS: A single-surgeon database was queried for all knees with recurrent patellar instability between 3/2000 and 6/2012 (n=214). Only knees which underwent knee arthroscopy during the surgical treatment were included (n=148)...
June 13, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28606557/is-superolateral-hoffa-s-fat-pad-hyperintensity-a-marker-of-local-patellofemoral-joint-disease-the-most-study
#16
M Jarraya, A Guermazi, D T Felson, F W Roemer, M C Nevitt, J Torner, C E Lewis, J Stefanik
PURPOSE: To determine the relation of superolateral Hoffa's fat pad (SHFP) hyperintensity to cartilage damage and bone marrow lesions (BMLs) in the patellofemoral joint (PFJ) and tibiofemoral joint (TFJ). METHODS: We used data from the 60 and 84-month study visits from the Multicenter Osteoarthritis (MOST) study. SHFP hyperintensity and Hoffa-synovitis were graded from 0 to 3. Cartilage damage and BMLs were scored in the PFJ and TFJ. Structural damage was defined as: any cartilage damage, full-thickness cartilage damage and any BML...
June 9, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28606466/hip-rate-of-force-development-and-strength-are-impaired-in-females-with-patellofemoral-pain-without-signs-of-altered-gluteus-medius-and-maximus-morphology
#17
Guilherme S Nunes, Christian John Barton, Fábio Viadanna Serrão
OBJECTIVES: To compare rate of force development (RFD) and isometric muscle strength of the hip abductors and extensors; and the thickness and the amount of non-contractile tissue of the gluteus medius and maximus between females with and without patellofemoral pain (PFP). DESIGN: Cross-sectional study. METHODS: Fifty-four physically active females (27 with PFP and 27 healthy individuals) were studied. Hip muscle isometric strength and RFD was evaluated using isokinetic dynamometry...
May 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28603570/successful-treatment-of-painful-synchondrosis-of-bipartite-patella-after-direct-trauma-by-operative-fixation-a-series-of-six-cases
#18
Sarkhell Radha, Michael Shenouda, Sujith Konan, Jonathon Lavelle, Samuel Church
INTRODUCTION: The patella is the largest sesamoid bone in the body and may have one (77%) or multiple (23%) ossification centres. Patellar and patellofemoral joint abnormalities are a common cause of anterior knee pain but symptomatic bipartite patella is an uncommon problem. CASE SERIES: We report a series of six cases of painful synchondrosis in bipartite patellae, all in keen athletes following a direct blow to the anterior aspect of the knee. A complete rupture of the synchondrosis with evidence of retropatellar chondral separation was seen on MRI scan in all cases...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28601942/anatomic-reconstruction-of-the-medial-patellofemoral-ligament-in-children-and-adolescents-using-a-pedicled-quadriceps-tendon-graft-shows-favourable-results-at-a-minimum-of-2-year-follow-up
#19
Manfred Nelitz, Jens Dreyhaupt, Sean Robert March Williams
PURPOSE: In adults, reconstruction of the medial patellofemoral ligament (MPFL) has shown good results. Treatment for recurrent patellar instability in children and adolescents with open growth plates, however, requires alternative MPFL reconstruction techniques. This study presents the outcomes of a minimally invasive technique for anatomic reconstruction of the MPFL in children using a pedicled superficial quadriceps tendon graft, hardware-free patellar graft attachment, and anatomic femoral fixation that spares the distal femoral physis...
June 10, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28601393/oxidized-zirconium-versus-cobalt-chromium-against-the-native-patella-in-total-knee-arthroplasty-patellofemoral-outcomes
#20
Fabrizio Matassi, Tommaso Paoli, Roberto Civinini, Christian Carulli, Massimo Innocenti
BACKGROUND: Oxidized zirconium (OxZr) has demonstrated excellent mechanical properties in vitro when used against articular cartilage; less coefficient of friction and less chondral damage have been found when compared with cobalt-chromium (CoCr) implants. However, controversy exists as to whether implants with a zirconium femoral component articulate safely with a native patella in total knee arthroplasty (TKA). To answer this question, the clinical and radiographic results were analysed from a group of patients who underwent a TKA with patella retention; the OxZr versus CoCr femoral components were compared...
June 7, 2017: Knee
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