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Patellofemoral

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https://www.readbyqxmd.com/read/28532997/the-influence-of-varus-and-valgus-deviation-on-patellar-kinematics-in-healthy-knees-an-exploratory-cadaver-study
#1
Michael Worlicek, Benedikt Moser, Günther Maderbacher, Raphael Zentner, Florian Zeman, Joachim Grifka, Armin Keshmiri
BACKGROUND: Patellofemoral instability may lead to osteoarthritis, anterior knee pain, and patellar luxation. The purpose of this study was to conduct an exploratory investigation into the difference of patellar kinematics of healthy knees during extension/flexion cycles in neutral, varus and valgus alignment. METHODS: The three-dimensional patellar kinematics of 10 lower extremities of whole body cadavers were examined during passive motion, in neutral position, and under valgus and varus stress...
May 19, 2017: Knee
https://www.readbyqxmd.com/read/28532476/effects-of-osteochondral-defect-size-on-cartilage-regeneration-using-a-double-network-hydrogel
#2
Kotaro Higa, Nobuto Kitamura, Keiko Goto, Takayuki Kurokawa, Jian Ping Gong, Fuminori Kanaya, Kazunori Yasuda
BACKGROUND: There has been increased interest in one-step cell-free procedures to avoid the problems related to cell manipulation and its inherent disadvantages. We have studied the chondrogenic induction ability of a PAMPS/PDMAAm double-network (DN) gel and found it to induce chondrogenesis in animal osteochondral defect models. The purpose of this study was to investigate whether the healing process and the degree of cartilage regeneration induced by the cell-free method using DN gel are influenced by the size of osteochondral defects...
May 22, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28530074/-patellofemoral-instability-anatomy-clinical-evaluation-imaging-and-treatment
#3
REVIEW
Noam Shohat, Dror Lindner, Iftach Beer, Gabriel Agar
Patellofemoral instability is a complex anatomical phenomena that requires deep understanding. The cause for instability could be a result of an anatomical defect or a soft tissue pathology. A thorough patient history, physical examination and imaging are paramount for a correct diagnosis and for deciding on the correct treatment. The proper treatment is often debatable. Conservative treatment is suitable for acute dislocation but has a high failure rate in chronic instability, which usually necessitates surgical treatment...
November 2016: Harefuah
https://www.readbyqxmd.com/read/28528349/high-wear-resistance-of-femoral-components-coated-with-titanium-nitride-a-retrieval-analysis
#4
Christian Fabry, Carmen Zietz, Axel Baumann, Reinhard Ehall, Rainer Bader
PURPOSE: The objective of this study was to evaluate the in vivo wear resistance of cobalt-chromium femoral components coated with titanium nitride (TiN). Our null hypothesis was that the surface damage and the thickness of the TiN coating do not correlate with the time in vivo. METHODS: Twenty-five TiN-coated bicondylar femoral retrievals with a mean implantation period of 30.7 ± 11.7 months were subjected to an objective surface damage analysis with a semi-quantitative assessment method...
May 20, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28522245/pin-site-complications-associated-with-computer-assisted-navigation-in-hip-and-knee-arthroplasty
#5
Eli Kamara, Zachary P Berliner, Matthew S Hepinstall, H John Cooper
BACKGROUND: There has been a great increase in the use of navigation technology in joint arthroplasty. In most types of navigation-assisted surgery, several temporary navigation pins are placed in the patient. Goals of this study are (1) to identify complications and (2) risk factors associated with placement of these pins. METHODS: This is a retrospective cohort study of all navigation-assisted hip and knee arthroplasty performed a single institution over a 3-year period...
April 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28515980/investigating-the-effectiveness-of-kinesio%C3%A2-taping-space-correction-method-in-healthy-adults-on-patellofemoral-joint-and-subcutaneous-space
#6
Katie J Lyman, Kassiann Keister, Kara Gange, Christopher D Mellinger, Thomas A Hanson
BACKGROUND: Limited quantitative, physiological evidence exists regarding the effectiveness of Kinesio® Taping methods, particularly with respect to the potential ability to impact underlying physiological joint space and structures. To better understand the impact of these techniques, the underlying physiological processes must be investigated in addition to the examination of more subjective measures related to pain in unhealthy tissues. HYPOTHESIS/PURPOSE: The purpose of this study was to determine whether the Kinesio® Taping Space Correction Method created a significant difference in patellofemoral joint space, as quantified by diagnostic ultrasound...
April 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28513275/relationship-between-lower-extremity-strength-and-subjective-function-in-individuals-with-patellofemoral-pain
#7
Neal R Glaviano, Susan Saliba
OBJECTIVE: Evaluate the relationship between subjective knee function and lower extremity strength in individuals with patellofemoral pain(PFP). DESIGN: Cohort. SETTING: Laboratory. PARTICIPANTS: Participants were 30 individuals with PFP (20 females, 10 males; 76.02±17.88kg, 173.04±7.58cm, 24.9±7years). MAIN OUTCOME MEASURES: Subjects completed the Activities of Daily Living Scale(ADLS) and had lower extremity hip and knee isometric strength assessed...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28510474/increased-magnetic-resonance-imaging-signal-of-the-lateral-patellar-facet-cartilage-a-functional-marker-for-patellar-instability
#8
Anna L Falkowski, Carlo Camathias, Jon A Jacobson, Olaf Magerkurth
BACKGROUND: In the knee joint, predisposition for patellar instability can be assessed by an abnormal Insall-Salvati index, tibial tuberosity-trochlear groove (TTTG) distance, and abnormal shape of patella and trochlea. Given the complex anatomic features of the knee joint with varying positions of the patella during motion, the presence of a single or even a combination of these factors does not inevitably result in patellar instability. After trocheoplasty in patients with trochlear dysplasia, assessment of trochlear cartilage and subchondral bone is limited due to postoperative artifacts...
May 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28508959/surgical-treatment-of-patellar-instability-clinical-and-radiological-outcome-after-medial-patellofemoral-ligament-reconstruction-and-tibial-tuberosity-medialisation
#9
Stefan Lobner, Christine Krauss, Frank Reichwein, Thilo Patzer, Wolfgang Nebelung, Arne J Venjakob
INTRODUCTION: The aim of this retrospective study was to analyse clinical and radiological outcome after medial patellofemoral ligament reconstruction (MPFLR) and tibial tuberosity medialisation (TTM) in patients with recurrent patellar instability. MATERIALS AND METHODS: Thirty-five patients were included between 2008 and 2012. According to defined criteria such as tibial tuberosity-trochlear groove (TTTG) distance, hyperpression on the lateral patella facet and lateral retropatellar cartilage damage either MPFLR (group A) or TTM (group B) was performed: 18 patients underwent TTM, the other 17 patients underwent MPFLR...
May 16, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28504067/effectiveness-of-inclusion-of-dry-needling-into-a-multimodal-therapy-program-for-patellofemoral-pain-a-randomized-parallel-group-trial
#10
Gemma V Espí-López, Pilar Serra-Añó, Juan Vicent-Ferrando, Miguel Sánchez-Moreno-Giner, Jose L Arias-Buría, Joshua Cleland, César Fernández-de-Las-Peñas
Study Design Randomized controlled trial. Background Evidence suggests that multimodal interventions including exercise therapy may be effective for patellofemoral pain (PFP), however no study has investigated the effects of trigger point dry needling (TrP-DN) in people with PFP. Objectives To compare the effects of adding TrP-DN into a manual therapy and exercise program on pain, function, and disability in individuals with PFP. Methods Individuals with PFP (n=60) recruited from a public hospital in Valencia (Spain) were randomly allocated to manual therapy and exercises (n=30) or manual therapy and exercise plus TrP-DN (n=30)...
May 13, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28500081/quadriceps-strengthening-with-and-without-blood-flow-restriction-in-the-treatment-of-patellofemoral-pain-a-double-blind-randomised-trial
#11
Lachlan Giles, Kate E Webster, Jodie McClelland, Jill L Cook
BACKGROUND: Quadriceps strengthening exercises are part of the treatment of patellofemoral pain (PFP), but the heavy resistance exercises may aggravate knee pain. Blood flow restriction (BFR) training may provide a low-load quadriceps strengthening method to treat PFP. METHODS: Seventy-nine participants were randomly allocated to a standardised quadriceps strengthening (standard) or low-load BFR. Both groups performed 8 weeks of leg press and leg extension, the standard group at 70% of 1 repetition maximum (1RM) and the BFR group at 30% of 1RM...
May 12, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28499486/intra-osseous-local-anaesthetic-patellar-pain-catheter-suppresses-osteoarthritic-patello-femoral-pain
#12
Dominik C Meyer, José A Aguirre, Karl Wieser, Sandro F Fucentese, Stephan Wirth, Christian Gerber, Stefan Rahm
BACKGROUND: The source of pain in patellofemoral osteoarthritis is not fully understood. The purpose of this study was to identify the origin of pain using intraosseous pain catheters and to show early results with an osteotomy that is potentially denervating and hydrostatic pressure-relieving. METHODS: Five patients with patellofemoral osteoarthritis and pain with straight downward patellofemoral compression were included. All underwent arthroscopic placement of two 0...
May 9, 2017: Knee
https://www.readbyqxmd.com/read/28499396/averaging-rotational-landmarks-during-total-knee-arthroplasty-reduces-component-malrotation-caused-by-femoral-asymmetry
#13
Tat Woon Chao, Liam Geraghty, Pandelis Dimitriou, Simon Talbot
BACKGROUND: Femoral component malrotation is a common cause of patient dissatisfaction after total knee arthroplasty. The sulcus line (SL) is more accurate than Whiteside's line as it corrects for variation in the coronal orientation of the groove. The hypothesis is that averaging the SL and posterior condylar axis (PCA) will reduce femoral malrotation. METHODS: The component was inserted at a position between the SL and PCA in 91 patients. An intraoperative photograph was taken showing the landmarks...
May 12, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28493040/stability-of-capsule-closure-and-postoperative-anterior-knee-pain-after-medial-parapatellar-approach-in-tka
#14
Armin Keshmiri, Fabian Dotzauer, Clemens Baier, Günther Maderbacher, Joachim Grifka, Ernst Sendtner
PURPOSE: Anterior knee pain after total knee arthroplasty (TKA) remains a widely discussed postoperative complication. In contrast to sports traumatology, the role of the dissected medial patellofemoral ligament (MPFL) using a medial parapatellar approach in TKA has not been discussed so far. In the present study, it was hypothesized that the attempted repair of the MPFL in TKA by simple closure of the joint capsule may not be successful in some cases, causing anterior knee pain. Furthermore, it was hypothesized, that the success of repair might be influenced by femoral component rotation...
May 10, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28488001/lateral-displacement-sulcus-angle-and-trochlear-angle-are-associated-with-early-patellofemoral-osteoarthritis-following-anterior-cruciate-ligament-reconstruction
#15
Erin M Macri, Adam G Culvenor, Hayden G Morris, Timothy S Whitehead, Trevor G Russell, Karim M Khan, Kay M Crossley
PURPOSE: Patellofemoral osteoarthritis (PFOA) occurs in approximately half of anterior cruciate ligament (ACL)-injured knees within 10-15 years of trauma. Risk factors for post-traumatic PFOA are poorly understood. Patellofemoral alignment and trochlear morphology may be associated with PFOA following ACL reconstruction (ACLR), and understanding these relationships, particularly early in the post-surgical time period, may guide effective early intervention strategies. In this study, patellofemoral alignment and trochlear morphology were investigated in relation to radiographic features of early PFOA 1-year post-ACLR...
May 9, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28482879/current-management-strategies-for-patellofemoral-pain-an-online-survey-of-99-practising-uk-physiotherapists
#16
Benjamin E Smith, Paul Hendrick, Marcus Bateman, Fiona Moffatt, Michael Skovdal Rathleff, James Selfe, Toby O Smith, Pip Logan
BACKGROUND: Patellofemoral pain (PFP) is considered one of the commonest forms of knee pain. This study aimed to identify how physiotherapists in the United Kingdom (UK) currently manage patellofemoral pain (PFP), particularly in relation to exercise prescription, and response to pain. METHODS: An anonymous survey was designed with reference to previous surveys and recent systematic reviews. Practising UK physiotherapists who treat patients with PFP were invited to take part via an invitation email sent through professional networks, the 'interactive Chartered Society of Physiotherapy (iCSP)' message board, and social media (Twitter)...
May 8, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28481686/lower-extremity-joint-loads-in-habitual-rearfoot-and-mid-forefoot-strike-runners-with-normal-and-shortened-stride-lengths
#17
Elizabeth R Boyer, Timothy R Derrick
Our purpose was to compare joint loads between habitual rearfoot (hRF) and habitual mid/forefoot strikers (hFF), rearfoot (RFS) and mid/forefoot strike (FFS) patterns, and shorter stride lengths (SLs). Thirty-eight hRF and hFF ran at their normal SL, 5% and 10% shorter, as well as with the opposite foot strike. Three-dimensional ankle, knee, patellofemoral (PF) and hip contact forces were calculated. Nearly all contact forces decreased with a shorter SL (1.2-14.9% relative to preferred SL). In general, hRF had higher PF (hRF-RFS: 10...
May 8, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28479913/an-anatomical-and-osteometric-study-of-the-femoral-sulcus-angle-in-adult-malawians
#18
Anthony Mwakikunga, Kondwani Katundu, Boniface Msamati, Anthony Gbenga Adefolaju, Lynne Schepartz
BACKGROUND: Femoral sulcus angle is particularly important in clinical evaluation of patellofemoral joint. Individuals show considerable differences in asymmetrical dimensions of the femur. OBJECTIVES: To determine the size of femoral sulcus angles in adult black Malawians using the skeletal collection in the department of Anatomy, College of Medicine and assess their gender differences; to compare femoral sulcus angles of Malawians with other ethnic groups. METHODS: A cross sectional study was done in which femoral sulcus angles of dry bones were measured using a goniometer...
December 2016: African Health Sciences
https://www.readbyqxmd.com/read/28476901/is-combining-gait-retraining-or-an-exercise-programme-with-education-better-than-education-alone-in-treating-runners-with-patellofemoral-pain-a-randomised-clinical-trial
#19
Jean-Francois Esculier, Laurent Julien Bouyer, Blaise Dubois, Pierre Fremont, Lynne Moore, Bradford McFadyen, Jean-Sébastien Roy
DESIGN: Single-blind randomised clinical trial. OBJECTIVE: To compare the effects of three 8-week rehabilitation programmes on symptoms and functional limitations of runners with patellofemoral pain (PFP). METHODS: Sixty-nine runners with PFP were randomly assigned to one of three intervention groups: (1) education on symptoms management and training modifications (education); (2) exercise programme in addition to education (exercises); (3) gait retraining in addition to education (gait retraining)...
May 5, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28470832/subjective-crepitus-as-a-risk-factor-for-incident-symptomatic-knee-osteoarthritis-data-from-the-osteoarthritis-initiative
#20
Grace H Lo, Michael T Strayhorn, Jeffrey B Driban, Lori Lyn Price, Charles B Eaton, Timothy E McAlindon
Objective Subjective crepitus is the complaint of hearing grating, cracking or popping sounds in and/or around a joint. We aimed to evaluate whether there is an association between crepitus and incident symptomatic knee osteoarthritis (SOA) in the Osteoarthritis Initiative (OAI), a multicenter longitudinal U.S. cohort. Methods Knees without baseline SOA were included. Crepitus frequency was assessed using a question from the Knee Injury and Osteoarthritis Outcome Score (KOOS) at baseline, 12-, 24-, and 36-month visits...
May 4, 2017: Arthritis Care & Research
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