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Patellofemoral joint

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https://www.readbyqxmd.com/read/28342696/measurement-of-change-on-medial-and-lateral-joint-gaps-by-navigation-system-in-multi-radius-ps-tka
#1
Yeesuk Kim, Jin Kyu Lee, Kyu-Sung Chung, Doo-Yeon Lee, Choong Hyeok Choi
BACKGROUND: The purpose of this study was to evaluate the joint gap kinematics in posterior-stabilized total knee arthroplasty (PS TKA). METHODS: Between January 2010 and April 2011, 44 consecutive patients (55 knees) who underwent primary PS TKA using the navigation system were assessed. There were 37 women and 7 men with a mean age at operation of 63 years (range; 58-73 years). After fixation of all components with cement and insertion of polyethylene trial insert, medial and lateral joint gap measurements were carried out without distraction force and separately using a navigation system on each flexion angles...
March 22, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28334450/short-term-effects-of-arthrotomy-with-and-without-infrapatellar-fat-pad-resection-on-the-normal-canine-stifle
#2
Yukihiro Fujita, Tetsuya Nakajo, Makoto Muto
OBJECTIVE: To investigate the short-term effects of infrapatellar fat pad (IFP) resection in normal dogs. STUDY DESIGN: Experimental in vivo study. ANIMALS: Five normal adult female beagle dogs. METHODS: The IFP was resected via arthrotomy in the left stifle joint (experimental side) while the right stifle underwent arthrotomy alone (sham side). An orthopedic examination was performed every week for 4 weeks and synovial fluid was analyzed before and 4 weeks after the procedure...
March 23, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28330756/femoral-articular-geometry-and-patellofemoral-stability
#3
Farhad Iranpour, Azhar M Merican, Seow Hui Teo, Justin P Cobb, Andrew A Amis
BACKGROUND: Patellofemoral instability is a major cause of anterior knee pain. The aim of this study was to examine how the medial and lateral stability of the patellofemoral joint in the normal knee changes with knee flexion and measure its relationship to differences in femoral trochlear geometry. METHODS: Twelve fresh-frozen cadaveric knees were used. Five components of the quadriceps and the iliotibial band were loaded physiologically with 175N and 30N, respectively...
March 19, 2017: Knee
https://www.readbyqxmd.com/read/28320074/diagnostic-performance-of-clinical-examination-measures-and-pain-presentation-to-identify-patellofemoral-joint-osteoarthritis
#4
J J Stefanik, R Duncan, D T Felson, G Peat
OBJECTIVE: Test the diagnostic performance of a comprehensive set of tests and measures to discriminate patellofemoral (PF) from tibiofemoral (TF) osteoarthritis (OA). METHODS: The Clinical Assessment of the Knee Study is a study of knee pain in the general population. The presence of PF crepitus and pain with PF compression were assessed. Anterior knee pain (AKP) was determined from a knee pain map. Pain with stairs and walking on level ground were assessed with the WOMAC...
March 20, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28303844/significance-of-diffusion-tensor-imaging-of-vastus-medialis-oblique-in-recurrent-patellar-dislocation
#5
Li-Si Liu, Zhuo-Zhao Zheng, Hui-Shu Yuan
BACKGROUND: Numerous studies have investigated the influence of osseous factors on patellofemoral joint instability, but research on the influence of dynamic muscle factors in vivo is still in the exploratory stage. This study aimed to use magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) to evaluate vastus medialis oblique (VMO) fiber bundles in patients with recurrent patellar dislocation to explore the changes in muscle morphology and function. METHODS: This prospective study involved 30 patients (7 males and 23 females; average age, 21...
March 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28298062/traumatic-patellar-dislocation-and-cartilage-injury
#6
Essi E Salonen, Teemu Magga, Petri J Sillanpää, Tommi Kiekara, Heikki Mäenpää, Ville M Mattila
BACKGROUND: Patellofemoral cartilage deterioration and osteoarthritis are reported to be associated with recurrent patellar dislocation. However, the association between first-time traumatic patellar dislocation and cartilage deterioration is unknown. PURPOSE: The aim of this study was to assess long-term cartilage deterioration in the patellofemoral and tibiofemoral joint after conservatively treated traumatic lateral patellar dislocation. STUDY DESIGN: Case series; Level of evidence, 4...
February 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28294398/functional-properties-of-native-and-tissue-engineered-cartilage-toward-understanding-the-pathogenesis-of-chondral-lesions-at-the-knee-a-bovine-cadaveric-study
#7
Nikolaos K Paschos, Nikita Lim, Jerry C Hu, Kyriacos A Athanasiou
Chondral lesions frequently occur in different topographic locations of the knee. This study evaluated the functional properties among the articulating surfaces of the tibiofemoral and patellofemoral joints, and whether neo-cartilage engineered using chondrocytes from different knee locations would reflect these differences. The biomechanical properties of bovine cartilage isolated from eight locations within the tibiofemoral (medial & lateral condyle, medial & lateral tibial plateau) and patellofemoral joints (medial & lateral trochlea, medial & lateral patella) were examined...
March 10, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28292715/footwear-characteristics-are-related-to-running-mechanics-in-runners-with-patellofemoral-pain
#8
Jean-Francois Esculier, Blaise Dubois, Laurent J Bouyer, Bradford J McFadyen, Jean-Sébastien Roy
Running footwear is known to influence step rate, foot inclination at foot strike, average vertical loading rate (VLR) and peak patellofemoral joint (PFJ) force. However, the association between the level of minimalism of running shoes and running mechanics, especially with regards to these relevant variables for runners with patellofemoral pain (PFP), has yet to be investigated. The objective of this study was to explore the relationship between the level of minimalism of running shoes and habitual running kinematics and kinetics in runners with PFP...
March 6, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28289819/medial-patellotibial-ligament-and-medial-patellomeniscal-ligament-anatomy-imaging-biomechanics-and-clinical-review
#9
REVIEW
Betina Bremer Hinckel, Riccardo Gomes Gobbi, Camila Cohen Kaleka, Gilberto Luis Camanho, Elizabeth A Arendt
PURPOSE: The purpose of this article is to review anatomical, biomechanical, and clinical data of the medial patellotibial ligament (MPTL) and medial patellomeniscal ligament (MPML), as well as studies focusing on the medial patellofemoral ligament (MPFL) but with relevant data about the MPTL and MPML. METHODS: A literature search of articles specifically addressing the MPTL and/or MPML was included along with studies focusing on the MPFL but with relevant data about the MPTL and MPML...
March 13, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28282672/all-arthroscopic-autologous-matrix-induced-chondrogenesis-aided-repair-of-a-patellar-cartilage-defect-using-dry-arthroscopy-and-a-retraction-system
#10
Boguslaw Sadlik, Mariusz Puszkarz, Lidia Kosmalska, Martin Wiewiorski
The technique of all-arthroscopic autologous matrix-induced chondrogenesis (AMIC)-aided repair of patellar cartilage lesions using a retraction system and dry arthroscopy has been recently described. We report the first clinical and radiological data at a short-term follow-up. Twelve patients underwent AMIC-aided cartilage repair for a patellar lesion. All steps of the procedure were performed arthroscopically, which include the use of an intra-articularly placed retraction plate for distraction of the patellofemoral joint and evacuation of saline solution for collagen matrix insertion and fixation...
March 10, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28280905/clinical-outcomes-after-revision-surgery-for-medial-patellofemoral-ligament-reconstruction
#11
Andreas Chatterton, Torsten Grønbech Nielsen, Ole Gade Sørensen, Martin Lind
PURPOSE: Medial patellofemoral ligament reconstruction (MPFL-R) is the standard surgical intervention for patella instability. However, limited knowledge exists concerning the causes for failure, and outcome after revision MPFL-R. The purpose of this study is to evaluate the causes of primary MPFL-R failure and clinical outcomes after revision MPFL-R. METHODS: Twenty-three patients (6 males and 17 females) with failed primary MPFL-R underwent isolated revision MPFL-R or combined revision MPFL-R with tibial tuberosity osteotomy (TTO)...
March 9, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28269628/development-of-an-open-source-cosimulation-method-of-the-knee
#12
Anne Schmitz, Davide Piovesan
Rigid body dynamics and soft tissue loads are solved simultaneously in a cosimulation framework to couple musculoskeletal dynamics and tissue mechanics. The goal of this work was to implement a validated, open-source cosimulation framework of the knee to determine how this coupling affects computed cartilage loads. The kinematic knee joint of a generic whole body model in the open-source software OpenSim was replaced by a previously developed discrete element knee model that consisted of a six degree of freedom (dof) tibiofemoral joint and one dof patellofemoral joint...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28265692/the-impact-of-generalized-joint-laxity-on-clinical-outcomes-of-total-knee-arthroplasty
#13
Sae Kwang Kwon, Hyuck Min Kwon, Youngho Kong, Kwan Kyu Park
PURPOSE: The aim of this study was to investigate whether the severity of generalized joint laxity influences preoperative and postoperative clinical outcomes and if patients with severe generalized joint laxity would require a thicker polyethylene (PE) liner during total knee arthroplasty (TKA). METHODS: A total of 338 female patients undergoing TKA were divided into two groups according to generalized joint laxity. Preoperative and postoperative (at 3 years) patellofemoral scale, AKS, WOMAC, ROM, and satisfaction VAS were compared between the two groups...
March 6, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28264631/effects-of-patellofemoral-taping-on-patellofemoral-joint-alignment-and-contact-area-during-weight-bearing
#14
Kai-Yu Ho, Ryan Epstein, Ron Garcia, Nicole Riley, Szu-Ping Lee
Study Design Controlled laboratory study. Background Although it has been theorized that patellofemoral joint (PFJ) taping can correct patellar malalignment, the effects of PFJ taping techniques on patellar alignment and contact area have not yet been studied during weight bearing. Objective To examine the effects of 2 taping approaches (Kinesio and McConnell) on PFJ alignment and contact area. Methods Fourteen female subjects with patellofemoral pain and PFJ malalignment participated. Each subject underwent a pretaping magnetic resonance imaging (MRI) scan session and 2 MRI scan sessions after the application of the 2 taping techniques, which aimed to correct lateral patellar displacement...
February 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28258176/the-patellofemoral-pain-and-osteoarthritis-subscale-of-the-koos-koos-pf-development-and-validation-using-the-cosmin-checklist
#15
Kay M Crossley, Erin M Macri, Sallie M Cowan, Natalie J Collins, Ewa M Roos
BACKGROUND: Patellofemoral pain and osteoarthritis are prevalent and associated with substantial pain and functional impairments. Patient-reported outcome measures (PROMs) are recommended for research and clinical use, but no PROMs are specific for patellofemoral osteoarthritis, and existing PROMs for patellofemoral pain have methodological limitations. This study aimed to develop a new subscale of the Knee injury and Osteoarthritis Outcome Score for patellofemoral pain and osteoarthritis (KOOS-PF), and evaluate its measurement properties...
March 3, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28254376/preoperative-patellofemoral-chondromalacia-is-not-a-contraindication-for-fixed-bearing-medial-unicompartmental-knee-arthroplasty
#16
Alexander J Adams, Gregory S Kazarian, Jess H Lonner
BACKGROUND: Patellofemoral chondromalacia (PFCM) has historically been considered a contraindication for unicompartmental knee arthroplasty (UKA), but there is limited data assessing PFCM's impact on the results of fixed-bearing UKA. Our objective was to assess the impact of medial patellar and/or medial trochlear PFCM on overall and patellofemoral-specific 2-year outcomes after fixed-bearing medial UKA. METHODS: Intraoperative notes defined the presence and location of PFCM during fixed bearing medial UKA...
January 16, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28237607/knee-morphometric-and-alignment-measurements-with-mr-imaging-in-young-adults-with-central-cartilage-lesions-of-the-patella-and-trochlea
#17
R Sebro, S Weintraub
PURPOSE: The goal of this study was to assess whether common measurements of patellar and trochlear morphology and patellar alignment are associated with central cartilage lesions of the patella and trochlea using magnetic resonance imaging (MRI). METHODS: The MRI examinations of 58 patients (38 women, 20 men; mean age, 28.59 years [range: 19-35 years]) with central cartilage lesions of the patella and trochlea were retrospectively compared to those obtained in 102 control subjects (57 women, 45 men; mean age, 27...
February 22, 2017: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/28236094/-diseases-and-overuse-injuries-of-the-lower-extremities-in-long-distance-runners
#18
REVIEW
M Tschopp, F Brunner
Running is one of the most popular sports worldwide, with running events attracting hundreds of thousands of runners of all age groups. Running is an effective way to improve health but is also associated with a high risk of injuries. Up to 50% of regular runners report having more than one injury each year. Some injuries are caused by an accident but most are caused by overuse. The most frequent diagnoses are patellofemoral pain syndrome, tibial stress syndrome (shin splint), Achilles tendinopathy, iliotibial band friction syndrome (runner's knee), plantar fasciitis and stress fractures of the metatarsals and tibia...
February 24, 2017: Zeitschrift Für Rheumatologie
https://www.readbyqxmd.com/read/28227886/development-of-an-open-source-cosimulation-method-of-the-knee
#19
Anne Schmitz, Davide Piovesan, Anne Schmitz, Davide Piovesan, Anne Schmitz, Davide Piovesan
Rigid body dynamics and soft tissue loads are solved simultaneously in a cosimulation framework to couple musculoskeletal dynamics and tissue mechanics. The goal of this work was to implement a validated, open-source cosimulation framework of the knee to determine how this coupling affects computed cartilage loads. The kinematic knee joint of a generic whole body model in the open-source software OpenSim was replaced by a previously developed discrete element knee model that consisted of a six degree of freedom (dof) tibiofemoral joint and one dof patellofemoral joint...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28220190/open-wedge-high-tibial-osteotomy-versus-unicompartmental-knee-arthroplasty-no-difference-in-progression-of-patellofemoral-joint-arthritis
#20
Kwang-Jun Oh, Young Chan Kim, Jong Seong Lee, Yong Suk Chang, Gautam M Shetty, Kyung Wook Nha
PURPOSE: The purpose of this retrospective comparative study was to evaluate and compare, radiographically and clinically, progression of osteoarthritis (OA) in the patellofemoral (PF) compartment after open-wedge high tibial osteotomy (OWHTO), and unicompartmental knee arthroplasty (UKA) over a minimum follow-up of 5 years. METHODS: In this study, 42 knees in an OWHTO group were compared with 59 knees in a UKA group in terms of radiographic parameters, such as the grading system for OA progression in the PF compartment, and clinical parameters, such as the PF pain and function scores over a minimum follow-up of 5 years...
March 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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