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Patellofemoral joint

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https://www.readbyqxmd.com/read/29438603/from-early-radiographic-knee-osteoarthritis-to-joint-arthroplasty-determinants-of-structural-progression-and-symptoms
#1
Frank W Roemer, C Kent Kwoh, Tomoko Fujii, Michael J Hannon, Robert M Boudreau, David J Hunter, Felix Eckstein, Markus R John, Ali Guermazi
OBJECTIVE: Aims were to assess (1) structural progression in knees with no/mild radiographic osteoarthritis (ROA) (i.e. Kellgren-Lawrence (K-L) grades 0 to 2) that will undergo knee replacement (KR) during a 5-year period; (2) differences in structural damage on MRI between knees with no/mild ROA vs. those with severe ROA (i.e. K-L 3 and 4) at baseline; and (3) differences in pain levels between those groups. METHODS: All participants who underwent KR from baseline (BL) to 60 months were drawn from the Osteoarthritis Initiative...
February 13, 2018: Arthritis Care & Research
https://www.readbyqxmd.com/read/29436742/biomechanical-influence-of-deficient-posterolateral-corner-structures-on-knee-joint-kinematics-a-computational-study
#2
Kyoung-Tak Kang, Yong-Gon Koh, Juhyun Son, Moonki Jung, Sangyun Oh, Sung-Jae Kim, Sung-Hwan Kim
The posterolateral corner (PLC) structures including the popliteofibular ligament (PFL), popliteus tendon (PT) and lateral collateral ligament (LCL) are important soft tissues for posterior translational, external rotational and varus angulation knee joint instabilities. The purpose of this study was to determine the effects of deficient PLC structures on the kinematics of the knee joint under gait and squat loading conditions. We developed subject-specific computational models with full 12-degree-of-freedom tibiofemoral and patellofemoral joints for four male subjects and one female subject...
February 13, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29428687/changes-in-patellofemoral-pain-resulting-from-repetitive-impact-landings-are-associated-with-the-magnitude-and-rate-of-patellofemoral-joint-loading
#3
Lee T Atkins, C Roger James, Hyung Suk Yang, Phillip S Sizer, Jean-Michel Brismée, Steven F Sawyer, Christopher M Powers
BACKGROUND: Although a relationship between elevated patellofemoral forces and pain has been proposed, it is unknown which joint loading variable (magnitude, rate) is best associated with pain changes. The purpose of this study was to examine associations among patellofemoral joint loading variables and changes in patellofemoral pain across repeated single limb landings. METHODS: Thirty-one females (age: 23.5(2.8) year; height: 166.8(5.8) cm; mass: 59.6(8.1) kg) with PFP performed 5 landing trials from 0...
February 7, 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29427724/relation-of-meniscus-pathology-to-prevalence-and-worsening-of-patellofemoral-joint-osteoarthritis-the-multicenter-osteoarthritis-study
#4
Harvi F Hart, Kay M Crossley, David Felson, Mohamed Jarraya, Ali Guermazi, Frank Roemer, Beth Lewis, Jim Torner, Michael Nevitt, Joshua J Stefanik
OBJECTIVE: To determine the relationship of meniscal damage to magnetic resonance imaging (MRI) features of compartment-specific patellofemoral joint (PFJ) osteoarthritis (OA) at baseline and 2 years later. METHOD: Individuals from a prospective cohort of individuals aged 50-79 with or at risk of knee OA were included. At the 60-month and 84-month study visit, Whole-Organ MRI Score (WORMS) was used to assess meniscal tears and extrusions as well as cartilage damage and bone marrow lesions (BMLs) in the medial and lateral patella and trochlea...
February 7, 2018: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29424762/can-diagnostic-and-therapeutic-arthrocentesis-be-successfully-performed-in-the-flexed-knee
#5
Sabeen Yaqub, Wilmer L Sibbitt, Philip A Band, James F Bennett, N Suzanne Emil, Monthida Fangtham, Roderick A Fields, William A Hayward, Scarlett K Kettwich, Luis P Roldan, Arthur D Bankhurst
BACKGROUND/OBJECTIVE: The objective of this study was to determine whether the extended or flexed knee positioning was superior for arthrocentesis and whether the flexed knee positioning could be improved by mechanical compression. METHODS: Fifty-five clinically effusive knees underwent arthrocentesis in a quality improvement intervention: 20 consecutive knees in the extended knee position using the superolateral approach, followed by 35 consecutive knees in the flexed knee position with and without an external compression brace placed on the suprapatellar bursa...
February 7, 2018: Journal of Clinical Rheumatology: Practical Reports on Rheumatic & Musculoskeletal Diseases
https://www.readbyqxmd.com/read/29424164/-research-progress-on-the-etiology-and-treatment-of-patellofemoral-pain-syndrome
#6
REVIEW
Li-Hua Cui
Patellofemoral pain syndrome (PFPS) is one of the most common diseases that cause pain in the knee joint. At present, there is no specific diagnostic measure. The diagnosis of patellofemoral pain syndrome may be considered when imaging is performed without cartilage, ligament and soft tissue injuries. The etiology includes abnormalities of the patellar motion caused by various anatomical abnormalities, such as abnormal patellar position, increased Q angle, and excessive valgus foot. Dysfunction of the lower extremity muscles such as the imbalance of the four biceps and the dysfunction of the gluteal muscles also play an important role in the development of patellofemoral pain syndrome...
July 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29421838/knee-pain-and-the-use-of-various-types-of-footwear-a-review
#7
Morad Chugthai, Jared M Newman, Samuel Akil, Anton Khlopas, Assem A Sultan, Nipun Sodhi, Anil Bhave, Steven F Harwin, Michael A Mont
Knee pain is a highly prevalent condition in the United States with multiple etiologies, with two of the most common sources being osteoarthritis (OA) and patellofemoral pain (PFP). These conditions can lead to reduced physical function and a poor quality of life. Various modalities have been used to decrease the amount of knee pain that individuals' experience; however, they are not always successful and can be expensive. Several studies have reported on specialized footwear for symptomatic alleviation of conditions that affect the knee, this is because it has been theorized that certain footwear can alter the forces placed by muscles on lower-extremity joints, and can potentially alleviate pain by reducing the load placed on the joint...
February 8, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29419685/the-adaptive-change-of-patellofemoral-joint-after-arthroscopic-discoid-lateral-meniscus-plasty-an-observational-study
#8
Jiangtao Dong, Hongtao Xu, Guorong Jin, Dongmei Xin, Jian Zhang, Kai Kang, Shijun Gao, Baicheng Chen, Yong Shen
The purpose of this study was to investigate the patellofemoral joint adaptive changes after discoid lateral meniscus (DLM) plasty.Forty-one patients with unilateral complete type DLM tears were included in this study. Demographic variables, including gender, age, body mass index (BMI), injury to operation interval, type of injury, and follow-up time, were recorded. The evolution of physical examination, imaging index, and functional score were analyzed by Chi-squared test, Wilcoxon signed ranks test, and Friedman test...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29411900/in-vivo-comparison-of-medialized-dome-and-anatomic-patellofemoral-geometries-using-subject-specific-computational-modeling
#9
Azhar A Ali, Erin M Mannen, Paul J Rullkoetter, Kevin B Shelburne
Successful outcome following total knee arthroplasty (TKA) with patella resurfacing is partly determined by the restoration of patellofemoral (PF) function and recovery of the quadriceps mechanism. The current study compared two patellar TKA geometries (medialized dome and anatomic) to determine their impact on PF mechanics and quadriceps function. In-vivo, subject-specific patellar mechanics were evaluated using a sequential experimental and modeling approach. First, stereo radiography, marker-based motion capture, and force plate data were collected for TKA patients (10 dome, 10 anatomic) performing a knee extension and lunge...
February 7, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29396963/cartilage-restoration-microfracture-and-osteochondral-autograft-transplantation
#10
Michael L Redondo, Adam J Beer, Adam B Yanke
The treatment of patellofemoral cartilage defects presents several distinct challenges when compared with cartilage restoration techniques used for other compartments of the knee due to the unique anatomy and distribution of forces. The etiologies of patellofemoral articular cartilage lesions include acute traumatic instability injuries, such as dislocation and subluxation, osteochondritis dissecans, and chronic degenerative changes. Regardless of the etiology, untreated patellofemoral cartilage lesions can contribute to activity-limiting anterior knee pain...
February 2, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29395552/patellofemoral-cartilage-lesions-treated-with-particulated-juvenile-allograft-cartilage-a-prospective-study-with-minimum-2-year-clinical-and-magnetic-resonance-imaging-outcomes
#11
Tim Wang, Nicole S Belkin, Alissa J Burge, Brenda Chang, Mollyann Pais, Gregory Mahony, Riley J Williams
PURPOSE: To analyze the functional outcomes of patients treated with particulated juvenile articular cartilage (PJAC) for symptomatic articular cartilage lesions in the patellofemoral joint, correlates clinical outcomes with magnetic resonance imaging (MRI) appearance of the repair tissue using cartilage-sensitive quantitative T2-mapping. METHODS: All patients treated with PJAC for patellofemoral lesions were identified and prospectively followed with clinical outcome scores (International Knee Documentation Committee [IKDC], Knee Outcome Survey-Activities of Daily Living [KOS-ADL], and Marx Activity Scale [MAS])...
January 29, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29387442/effects-of-an-8-week-strength-training-intervention-on-tibiofemoral-joint-loading-during-landing-a-cohort-study
#12
Maike B Czasche, Jon E Goodwin, Anthony M J Bull, Daniel J Cleather
Objectives: To use a musculoskeletal model of the lower limb to evaluate the effect of a strength training intervention on the muscle and joint contact forces experienced by untrained women during landing. Methods: Sixteen untrained women between 18 and 28 years participated in this cohort study, split equally between intervention and control groups. The intervention group trained for 8 weeks targeting improvements in posterior leg strength. The mechanics of bilateral and unilateral drop landings from a 30 cm platform were recorded preintervention and postintervention, as was the isometric strength of the lower limb during a hip extension test...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29369174/a-case-report-and-literature-review-on-fabella-syndrome-after-high-tibial-osteotomy
#13
Taehun Kim, Haksun Chung, Hyungmin Lee, Young Choi, Jung-Hwan Son
RATIONALE: The fabella is a normal structure, but is occasionally reported to cause posterior knee pain. The aim of this study was to present fabella syndrome after high tibial osteotomy. PATIENT CONCERNS: A 55-year-old female patient was admitted to the hospital due to about 1 year and 8 months of left knee pain. Sclerosis was observed in the anterior margin of the fabella in the preoperative magnetic resonance (MR) T2 image, and reactive bone marrow was found and was considered to be due to degeneration of the distal femur...
January 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29356388/analysis-of-the-moment-arms-and-kinematics-of-ostrich-struthio-camelus-double-patellar-sesamoids
#14
Sophie Regnault, Vivian R Allen, Kyle P Chadwick, John R Hutchinson
The patella ("kneecap") is a biomechanically important feature of the tendinous insertion of the knee extensor muscles, able to alter the moment arm lengths between its input and output tendons, and so modify the mechanical advantage of the knee extensor muscle. However, patellar gearing function is little-explored outside of humans, and the patella is often simplified or ignored in biomechanical models. Here, we investigate patellar gearing and kinematics in the ostrich-frequently used as an animal analogue to human bipedal locomotion and unusual in its possession of two patellae at the knee joint...
April 2017: Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
https://www.readbyqxmd.com/read/29353744/methods-to-assess-patellofemoral-joint-stress-a-systematic-review
#15
REVIEW
Guilherme S Nunes, Rodrigo Scattone Silva, Ana Flávia Dos Santos, Ricardo A S Fernandes, Fábio Viadanna Serrão, Marcos de Noronha
Changes in patellofemoral joint (PFJ) stress are related to the development and course of PFJ dysfunctions. Different methods for PFJ stress calculation have been used, making the comparison of PFJ stress values across different studies difficult. The purpose of this study was to systematically review the methods for PFJ stress calculation and highlight the differences among the methods. A systematic literature search was conducted in Medline, Embase, CINAHL, SPORTDiscus and Web of Science databases. Included studies examined PFJ stress in subjects with or without musculoskeletal conditions...
December 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29349990/-experimentation-of-the-relationship-between-medial-or-lateral-patellar-stabilizer-and-patellofemoral-stabilization
#16
Xing-Sen Liang, Zheng-Hong Yu, Yi-Kai Li, Ying-Ping Jiang, Xian-Wu Chen, Min Huang
OBJECTIVE: To study the contribution of medial or lateral stabilizer to the stability of the patella, to explore the function and effect of releasing the LPR clinically and to provide a biomechanical basis for the clinical treatment of patellar instability(PI). METHODS: The quadriceps femoris of 6 fresh human cadaver knees were loaded to simulate a normal condition of muscle strength. First the loading force was measured and recorded, which subluxated the patella with the different degrees of knee flexion...
April 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349972/-current-therapy-progress-on-the-recurrent-patellar-dislocation
#17
REVIEW
Wan-Quan Cao, Zi-Quan Yang, Gang Wang, Ya-Xun Men, Xiang-Yun Cheng
Patients who suffer from the recurrent patellar dislocation mainly show the recurrent dislocation of patellar, giving way, most patients have the history of trauma or dysplasia of keen joint. Traditional therapies of recurrent patellar dislocation include medical retinaculum placation, lateral retinaculum release, tibial tubercle osteotomy, femoral trochleoplasty etc. In recent years, with the development of anatomical and biomechanical researches on medial patellofemoral ligament(MPFL), more and more experts focus on the role of MPFL played in preventing the patellar dislocation...
March 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349013/open-wedge-valgus-high-tibial-osteotomy-technique-with-inverted-l-shaped-configuration
#18
Juan C Monllau, Juan I Erquicia, Federico Ibañez, Maximiliano Ibañez, Pablo E Gelber, Angel Masferrer-Pino, Xavier Pelfort
High tibial osteotomy (HTO) is a useful alternative in the treatment of symptomatic varus malalignment. However, among its drawbacks is the tendency to decrease patellar height and increase the posterior tibial slope. The increased tibial slope increases anterior cruciate ligament tension and may compromise its function. On the other hand, patella baja often causes anterior knee pain and, over time, may favor degeneration of the patellofemoral joint. The aim of this study is to describe a technical modification of the standard open-wedge HTO...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29344696/reconstruction-of-the-medial-patellotibial-ligament-results-in-favorable-clinical-outcomes-a-systematic-review
#19
Charles A Baumann, Eli L Pratte, Seth L Sherman, Elizabeth A Arendt, Betina B Hinckel
PURPOSE: The medial patellotibial ligament (MPTL), the medial patellofemoral ligament (MPFL), and the medial patellomeniscal ligament (MPML) support the stability of the patellofemoral joint. The purpose of this systematic review was to report the surgical techniques and clinical outcomes of the repair or reconstruction of the MPTL in isolation or concomitant with the MPFL and/or other procedures. METHODS: A systematic review of the literature was conducted. Inclusion criteria were articles in the English language that reported clinical outcomes of the reconstruction of the MPTL in isolation or in combination with the MPFL and/or other procedures...
January 17, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29330745/-treatment-of-rotational-malalignment-of-the-lower-leg
#20
REVIEW
P Keppler
BACKGROUND: Rotational malalignment after intramedullary nailing of tibial shaft fractures is not uncommon. In-toeing and out-toeing conditions in children are often the reason for orthopedic and traumatological medical consultation. OBJECTIVE: Evaluation of diagnostic modalities and therapeutic options for rotational malalignment in relationship to the patient's age. Surgical indications and efficacy of specific surgical techniques. MATERIAL AND METHODS: Systematic literature search in the German Institute for Medical Documentation and Information (DIMDI) and MEDLINE and evaluation of the currently published articles...
January 12, 2018: Der Unfallchirurg
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