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patellofemoral pain

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https://www.readbyqxmd.com/read/28437676/superior-inferior-position-of-patellar-component-affects-patellofemoral-kinematics-and-contact-forces-in-computer-simulation
#1
Shinichiro Nakamura, Yoshihisa Tanaka, Shinichi Kuriyama, Kohei Nishitani, Hiromu Ito, Moritoshi Furu, Shuichi Matsuda
BACKGROUND: Anterior knee pain has been reported as a major postoperative complication after total knee arthroplasty, which may lead to patient dissatisfaction. Rotational alignment and the medial-lateral position correlate with patellar maltracking, which can cause knee pain postoperatively. However, the superior-inferior position of the patellar component has not been investigated. The purpose of the current study was to investigate the effects of the patellar superior-inferior position on patellofemoral kinematics and kinetics...
April 18, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28437567/people-with-patellofemoral-oa-walk-with-different-pelvic-and-hip-kinematics-compared-to-healthy-aged-matched-controls
#2
Kay M Crossley, Anthony G Schache, Hannah Ozturk, Jonathan Lentzos, Melissa Munanto, Marcus G Pandy
Objective, Patellofemoral joint (PFJ) osteoarthritis (OA) is common, yet little is known about how this condition influences lower-limb biomechanical function. This study compared pelvis and lower-limb kinematics in people with and without PFJOA., Methods, Sixty-nine participants (64% women, mean age 56±10 years) with anterior knee pain aggravated by PFJ loaded activities (stair ambulation, rising from sitting, squatting) and radiographic lateral PFJOA on skyline radiographs were compared with 18 controls (78% women, mean age 53±7 years) with no lower-limb pain or radiographic OA...
April 24, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28437495/a-practical-guide-to-understanding-and-treating-patellofemoral-pain
#3
John P Fulkerson
There is no shortcut to accurate diagnosis in the patellofemoral pain patient. Most important in the process is a desire and ability to specifically identify the structural and biomechanical origin of pain. This can be elusive and often requires a careful analysis of all factors affecting the patient, including documenting his or her specific history of pain origin and specific treatments to date, and acknowledging the patient's localization of the pain origin. Many patients can pinpoint the site of pain origin when given the time and encouragement to do so...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28437494/patellofemoral-pain-an-enigma-explained-by-homeostasis-and-common-sense
#4
William R Post, Scott F Dye
We present a rational, scientific, low-risk approach to patellofemoral pain (anterior knee pain) based on an understanding of tissue homeostasis. Loss of tissue homeostasis from overload and/or injury produces pain. Bone overload and synovial inflammation are common sources of such pain. Chondromalacia and malalignment are findings that almost always do not need to be "corrected" to relieve pain. Patience and persistence in nonoperative care results in consistent success. Surgery should be rare and done only after extensive nonoperative management and in the setting of clearly defined pathology...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28437491/correct-positioning-of-the-medial-patellofemoral-ligament-troubleshooting-in-the-operating-room
#5
M Tyrrell Burrus, Brian C Werner, Jourdan M Cancienne, David R Diduch
Medial patellofemoral ligament (MPFL) reconstruction is often required after failed nonoperative management of lateral patellar instability. It is important to properly re-create the native ligament to avoid altering patellofemoral biomechanics. Such alterations can cause knee stiffness, anterior knee pain, and patellofemoral chondrosis. Incorrect femoral location is the most common mistake that affects MPFL graft biomechanics. Authors have described multiple radiographic and anatomical landmarks that assist in determining the appropriate location, and time should be taken to accurately localize this position...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28437490/the-diagnosis-and-initial-treatment-of-patellofemoral-disorders
#6
Alan C Merchant, John P Fulkerson, Wayne Leadbetter
Our purpose is to provide simple guidelines for the diagnosis and early care of patellofemoral disorders. Any clinician who treats knee problems, including family practitioners, rheumatologists, orthopedic surgeons, or physical therapists, must know how to make the correct diagnosis, or at least a presumptive diagnosis, at the initial visit. This can avoid unneeded and costly tests, ineffective treatment, and even damaging exercises and unnecessary surgery. The diagnosis of patellofemoral disorders is confusing because they can have many causes...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28436583/physical-activity-and-exercise-for-chronic-pain-in-adults-an-overview-of-cochrane-reviews
#7
REVIEW
Louise J Geneen, R Andrew Moore, Clare Clarke, Denis Martin, Lesley A Colvin, Blair H Smith
BACKGROUND: Chronic pain is defined as pain lasting beyond normal tissue healing time, generally taken to be 12 weeks. It contributes to disability, anxiety, depression, sleep disturbances, poor quality of life, and healthcare costs. Chronic pain has a weighted mean prevalence in adults of 20%.For many years, the treatment choice for chronic pain included recommendations for rest and inactivity. However, exercise may have specific benefits in reducing the severity of chronic pain, as well as more general benefits associated with improved overall physical and mental health, and physical functioning...
April 24, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28431578/is-the-effectiveness-of-patellofemoral-bracing-modified-by-patellofemoral-alignment-and-trochlear-morphology
#8
Xi Zhang, Jillian P Eyles, Joanna Makovey, Matthew J Williams, David J Hunter
BACKGROUND: This study was performed to determine if the effectiveness of patellofemoral bracing as a treatment for patellofemoral osteoarthritis is influenced by patellofemoral joint alignment and trochlear morphology. We hypothesized that those with more extreme patellar malalignment would benefit more from bracing. METHODS: Thirty-eight patients who had received bracing as part of a comprehensive treatment plan for patellofemoral osteoarthritis were selected for this study...
April 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28422563/effects-of-anterior-knee-displacement-during-squatting-on-patellofemoral-joint-stress
#9
Thomas W Kernozek, Naghmeh Gheidi, Matthew Zellmer, Jordan Hove, Becky L Heinert, Michael R Torry
CONTEXT: Squatting is a common rehabilitation training exercise for Patellofemoral pain syndrome (PFPS). Patellofemoral joint stress (PFJS) during squatting with more anterior knee displacement has not been systematically investigated. OBJECTIVE: The aim was to compare PFJS during squatting using two techniques: Squat while keeping the knees before the toes (SBT) and squat while allowing the knees to go past the toes (SPT). SETTING: University research laboratory...
April 19, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28420379/distribution-and-symmetrical-patellofemoral-pain-patterns-as-revealed-by-high-resolution-3d-body-mapping-a-cross-sectional-study
#10
S A Boudreau, E N Kamavuako, M S Rathleff
BACKGROUND: Detailed pain mapping of extent and distribution in individuals with patellofemoral pain (PFP) within and around a complex structure such as the knee has yet to be explored. METHODS: Perceptions of on-going pain from adolescents and young adults (N = 35) with long-standing (>10 months) PFP were collected on high-resolution 3D digital body-schema of the knees. Location, area of pain, pain intensity, laterality, worse side of knee pain, symptom duration, and symmetry in bilateral knee pain were recorded...
April 18, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28419810/the-relationship-of-static-tibial-tubercle-trochlear-groove-measurement-and-dynamic-patellar-tracking
#11
Victor R Carlson, Frances T Sheehan, Aricia Shen, Lawrence Yao, Jennifer N Jackson, Barry P Boden
BACKGROUND: The tibial tubercle to trochlear groove (TT-TG) distance is used for screening patients with a variety of patellofemoral joint disorders to determine who may benefit from patellar medialization using a tibial tubercle osteotomy. Clinically, the TT-TG distance is predominately based on static imaging with the knee in full extension; however, the predictive ability of this measure for dynamic patellar tracking patterns is unknown. PURPOSE: To determine whether the static TT-TG distance can predict dynamic lateral displacement of the patella...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28406876/cartilage-restoration-techniques-for-the-patellofemoral-joint
#12
Robert H Brophy, Robert D Wojahn, Joseph D Lamplot
Symptomatic osteochondral lesions of the patellofemoral joint are clinically challenging to manage because of the limited healing potential of articular cartilage; the complex morphology of the patellofemoral joint; the heterogeneity of the articular surface between patients; and high stresses across the joint, which can be altered by malalignment, tilt, or maltracking. Indications for surgery include traumatic lesions, osteochondritis dissecans, and high-grade chondromalacia in association with persistent pain despite a course of nonsurgical management...
May 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28388232/increasing-and-decreasing-pain-causes-acute-responses-of-strength-and-running-mechanics-in-patellofemoral-pain
#13
David M Bazett-Jones, Wendy Huddleston, Stephen Cobb, Kristian O'Connor, Jennifer E Earl-Boehm
CONTEXT:   Patellofemoral pain (PFP) is typically exacerbated by repetitive activities that load the patellofemoral joint, such as running. Understanding the mediating effects of changes in pain in individuals with PFP might inform injury progression, rehabilitation, or both. OBJECTIVE:   To investigate the effects of changing pain on muscular strength and running biomechanics in those with PFP. DESIGN:   Crossover study. SETTING:   University research laboratory...
April 7, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28387861/lower-pressure-pain-thresholds-in-patellofemoral-pain-patients-especially-in-female-patients-a-cross-sectional-case-control-study
#14
Rianne A van der Heijden, Melissa M Rijndertse, Sita M A Bierma-Zeinstra, Marienke van Middelkoop
Objective. : It has been suggested that repeated overload might sensitize nociceptors, causing local hyperalgesia in patients with patellofemoral pain (PFP). This might also lead to generalized hyperalgesia, indicative of altered central pain processing. This study aimed to investigate differences in pressure pain threshold (PPT) as a measure of pressure hyperalgesia between patients with PFP and healthy controls and in predefined subgroups and to study associations between PPT and patient characteristics...
April 6, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28357492/patient-based-outcomes-after-medial-patellofemoral-ligament-reconstruction
#15
Takehiko Matsushita, Shinya Oka, Daisuke Araki, Kyohei Nishida, Toshikazu Tanaka, Noriyuki Kanzaki, Kotaro Nishida, Ryosuke Kuroda
PURPOSE: The purpose of this study was to evaluate subjective outcomes after medial patellofemoral ligament (MPFL) reconstructions. METHODS: Fifty-four knees of 46 patients who received MPFL reconstruction for recurrent patellar dislocations were examined with a minimum follow-up of two years. To assess patient-based outcomes, the Knee Injury and Osteoarthritis Outcome Score (KOOS) and the Kujala score were assessed. RESULTS: The mean Kujala score was significantly improved from 64...
March 29, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28351371/unicompartmental-knee-arthroplasty-is-it-superior-to-high-tibial-osteotomy-in-treating-unicompartmental-osteoarthritis-a-meta-analysis-and-systemic-review
#16
Marcel Budhi Santoso, Lidong Wu
BACKGROUND: Debate remains whether high tibial osteotomy (HTO) or unicompartmental knee arthroplasty (UKA) is more beneficial for the treatment of unicompartmental knee osteoarthritis. The purpose of this study was to compare the functional results, knee scores, activity levels, and complications between the two procedures. METHODS: We performed a systematic review of published literature from August 1982 through January 2017. Fifteen papers reporting three prospective randomized trials were subjected to a meta-analysis...
March 28, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28340623/changes-in-clinical-symptoms-and-functional-disability-in-patients-with-coexisting-patellofemoral-and-tibiofemoral-osteoarthritis-a-1-year-prospective-cohort-study
#17
Hirotaka Iijima, Naoto Fukutani, Takuya Isho, Yuko Yamamoto, Masakazu Hiraoka, Kazuyuki Miyanobu, Masashi Jinnouchi, Eishi Kaneda, Tomoki Aoyama, Hiroshi Kuroki, Shuichi Matsuda
BACKGROUND: This 1-year prospective cohort study aimed to compare the changes in clinical symptoms and functional disability between patients with coexisting patellofemoral (PF) and tibiofemoral (TF) osteoarthritis (OA) and those with isolated TFOA. METHODS: Seventy-two patients with medial knee OA were enrolled. Knee pain and functional disability were assessed at baseline and at 1-year follow-up using the Japanese Knee Osteoarthritis Measure (JKOM) and a visual analog scale (VAS)...
March 24, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28340134/primary-motor-cortex-organization-is-altered-in-persistent-patellofemoral-pain
#18
Maxine Te, Abrahão F Baptista, Lucy S Chipchase, Siobhan M Schabrun
Objective.:  Reorganization of the primary motor cortex (M1) may be a feature of persistent patellofemoral pain (PFP), but no studies have investigated M1 organization in this condition. Here we aimed to examine the organization of the M1 representation of the quadriceps muscles in people with PFP and healthy controls. Design.:  Using a cross-sectional design, the M1 representation of the rectus femoris, vastus lateralis, and vastus medialis was mapped using transcranial magnetic stimulation in 11 individuals with PFP and 11 controls...
March 14, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28330756/femoral-articular-geometry-and-patellofemoral-stability
#19
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/28326427/posterior-stabilized-total-knee-arthroplasty-a-matched-pair-analysis-of-a-classic-and-its-evolutional-design
#20
Pier Francesco Indelli, Gennaro Pipino, Paul Johnson, Angelo Graceffa, Massimiliano Marcucci
BACKGROUND: Total knee arthroplasty (TKA) designs continue to be modified to optimize patient's outcome. This study was designed to compare clinical and radiological results of classic worldwide used TKA posterior-stabilized (PS) design to those of its recent evolution. METHODS: A consecutive group of 100 patients undergoing TKA using a classic cemented fixed-bearing PS TKA system was matched by age, gender, body max index to 100 patients having the newer cemented fixed-bearing PS design, both by the same manufacturer...
December 2016: Arthroplasty Today
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