Diego M Ferreira, Huaqing Liang, Jianhua Wu
BACKGROUND: The pendulum test is commonly used to measure passive stiffness about the knee in healthy and clinical populations. While most studies used an upright position, some studies explored different body positions, particularly with children. Additionally, including external ankle load increases the passive motion of the lower leg in children with Down syndrome. Does combining body position and ankle loading affect joint kinematics and muscle activity of the knee extensors during the pendulum test? METHODS: Twenty young adults participated in this study...
March 22, 2023: Knee
Nobutake Ozeki, Hideyuki Koga, Yusuke Nakagawa, Hiroki Katagiri, Hisako Katano, Makoto Tomita, Jun Masumoto, Ichiro Sekiya
BACKGROUND: The purpose of this study was to retrospectively investigate whether the average cartilage thickness calculated by magnetic resonance imaging (MRI) three-dimensional (3D) analysis system was correlated with the International Cartilage Repair Society (ICRS) grade at each subregion, as a representative scoring for arthroscopic evaluation. METHODS: The subjects were 102 patients who underwent arthroscopy for meniscus repair or high tibial osteotomy for medial osteoarthritis of the knee...
March 21, 2023: Knee
Howell Fu, Chao Wang, Irrum Afzal, Deiary Kader, Vipin Asopa, David Sochart
BACKGROUND: There is a trend towards minimising length of stay (LOS) after total knee arthroplasty (TKA), as greater LOS is associated with poorer outcomes and higher costs. Patient factors known to influence LOS post-TKA include age and ASA grade. Evidence regarding the effect of body mass index (BMI) in particular is conflicting, with some studies finding that increased BMI predicts increased LOS, while others have found no relationship. Few previous studies, which have mostly been conducted outside the UK, have examined the effect of living alone or socioeconomic deprivation, which may be confounders...
March 14, 2023: Knee
Benjamin D Brightwell, Michael A Samaan, Darren Johnson, Brian Noehren
BACKGROUND: Anterior cruciate ligament (ACL) reconstructions are associated with long-term functional impairments. Improved understanding of dynamic knee joint stiffness and work may provide insights to help address these poor outcomes. Defining the relationship between knee stiffness, work and quadriceps muscle symmetry may reveal therapeutic targets. The purposes of this study were to investigate between-limb differences in knee stiffness and work during early phase landing 6-months after an ACL reconstruction...
March 11, 2023: Knee
Tyler J Humphrey, Mehdi Sina Salimy, Jeffrey M Jancuska, Cameron R Egan, Christopher M Melnic, Kyle Alpaugh, Hany S Bedair
BACKGROUND: Sarcopenia, which is a progressive and multifactorial condition of decreased muscle strength, has been identified as an independent predictor for falls, revision, infection, and readmissions following total knee arthroplasty (TKA), but its association to patient reported outcomes (PROMs) is less studied. The aim of this study is to determine if sarcopenia and other measures of body composition are correlated with ability to achieve the 1-year minimal clinically important difference (MCID) of the KOOS JR and PROMIS-PF-SF10a following primary TKA...
March 11, 2023: Knee
Takuji Yokoe, Koki Ouchi, Taisei Matsumoto, Takuya Tajima, Etsuo Chosa
BACKGROUND: Partial meniscectomy is commonly performed for symptomatic patients with discoid lateral meniscus (DLM) if conservative treatment fails. However, the development of knee osteoarthritis and osteochondral lesion are detrimental postoperative complications. This study aimed to evaluate the effect of the volume of resected DLM on the contact stress of the tibiofemoral joint using a finite element analysis. METHODS: Subject-specific finite-element models of the knee joint of a patient with DLM were developed from computed tomographic and magnetic resonance images...
March 9, 2023: Knee
Willie Dong, Bruce D Beynnon
BACKGROUND: Disruption of the anterior cruciate ligament (ACL) is associated with significant biomechanical and neuromuscular changes including deficits in joint proprioception. While previous studies have assessed joint position sense (JPS) in ACL deficient knees, methods have varied and few have done so with prospective study designs. The specific aim of this investigation was to determine the effect(s) of ACL reconstruction and recovery time may have on JPS. METHODS: In this prospective study, we assess the effects of ACL reconstruction and rehabilitation on joint position sense in a temporal study...
March 7, 2023: Knee
Joseph Koressel, Brian A Perez, Gregory T Minutillo, Caroline B Granruth, Sand Mastrangelo, Gwo-Chin Lee
BACKGROUND: Wound complications following revision TKA can be catastrophic and can compromise joint and even limb. The purpose of this study was to determine the prevalence of superficial wound complications requiring return to the OR in revision TKA, rates of subsequent deep infection, factors that increase the risk of superficial wound complications, and the outcomes of revision TKA following development of superficial wound complications. METHODS: We retrospectively reviewed 585 consecutive TKA revisions with at least two years follow-up, including 399 aseptic revisions and 186 reimplantations...
March 4, 2023: Knee
Sandro Hodel, Andreas Flury, Armando Hoch, Philipp Fürnstahl, Patrick Oliver Zingg, Lazaros Vlachopoulos, Sandro F Fucentese
BACKGROUND: The relationship between functional femoral antetorsion, the greater trochanter (GT) position and anatomical antetorsion has been demonstrated in patients with a primary hip pathology. However, the functional antetorsion and GT position have not been analyzed in patellofemoral dysplastic knees. The aim of this study was to develop a three-dimensional (3D) measurement to quantify the functional femoral antetorsion and position of the GT and to analyze these measurements in a cohort of high-grade patellofemoral dysplastic knees...
March 3, 2023: Knee
Jonatas Brito de Alencar Neto, Maria Luzete Costa Cavalcante, Pedro Henrique Messias da Rocha, Camilo Partezani Helito, Lana Lacerda de Lima, Diego Ariel de Lima
BACKGROUND: The aim of the present study is to describe the morphology and distribution of the nerve endings of the meniscotibial ligament (MTL) of the knee, in order to understand the interaction between the proprioceptive system and knee mechanics. METHODS: Twenty medial MTLs were obtained from deceased organ donors. The ligaments were measured, weighed and cut. Sections (10 mm) were prepared on hematoxylin and eosin-stained slides for analysis of tissue integrity, and 50 mm sections were submitted to immunofluorescence with the protein gene product (PGP) 9...
February 28, 2023: Knee
T Alkjaer, M K Zebis, R B Herzog, M Lundgaard-Nielsen, L T Skovgaard, M R Krogsgaard, S Warming
BACKGROUND: Hop performance evaluation in children after anterior cruciate ligament (ACL) reconstruction may benefit from comparison to healthy controls. Thus, the purpose was to investigate the hop performance in children one year after ACL reconstruction with a comparison to healthy controls. METHODS: Hop performance data from children with ACL reconstruction one year post-surgery and healthy children were compared. Four one-legged hop test data were analyzed: 1) single hop (SH), 2) 6 m timed hop (6 m-timed), 3) triple hop (TH), and 4) cross-over hop (COH)...
February 28, 2023: Knee
Ahmed M Ahmed, Ahmad Addosooki, Ahmed Saleh Sleem, Elsayed Said
PURPOSE: This systematic review aimed to compare survivorship and plate-related results of Puddu and TomoFix plates in opening-wedge high tibial osteotomy (OWHTO). METHODS: PubMed, Scopus, EMBASE, and CENTRAL databases were searched from January 2000 until September 2021 for clinical studies involving patients with medial compartment knee disease and varus deformity undergoing OWHTO using the Puddu or TomoFix plating systems. We extracted survival data, plate-related complications, and functional and radiological outcomes...
February 28, 2023: Knee
Tadashi Tsukeoka, Yoshikazu Tsuneizumi
BACKGROUND: Many modern total knee arthroplasty (TKA) systems use posterior condylar axis (PCA) to derive the surgical trans-epicondylar axis (sTEA), which is widely regarded as the gold standard for femoral component rotation. However, the previous imaging studies showed that cartilage remnants can alter component rotation. We therefore conducted this study to determine how the postoperative femoral component rotation deviated from the preoperative plan using three-dimensional (3D) computed tomography (CT) which does not consider cartilage thickness...
February 25, 2023: Knee
Alok Umre, Om Wakde, Ritesh Meghare
BACKGROUND: Achieving appropriate alignment of components in total knee arthroplasty (TKA) is essential for optimal functional outcomes as well as implant longevity. Performing TKA in the absence of a computer-assisted navigation system (CANS) mandates the use of accurate anatomical landmarks for achieving appropriate alignment. In this study, we have evaluated the reliability of 'mid-sulcus line' as an anatomical landmark to guide tibial resection, with the intra-operative help of CANS...
February 25, 2023: Knee
Hyun Jin Yoo, Hee Seung Nam, Sung Bae Park, Yong Seuk Lee
BACKGROUND: The mainstay treatment for tenosynovial giant cell tumor (TGCT) is open excision. However, open excision is associated with the risk of stiffness, infection, neurovascular injury, and prolonged hospital stay and rehabilitation. The purpose of this study was to evaluate the efficacy of arthroscopic excision of tenosynovial giant cell tumor (TGCT) of the knee joint, including the diffuse type of TGCT. METHODS: Patients who underwent arthroscopic excision of TGCT between April 2014 and November 2020 were retrospectively analyzed...
February 25, 2023: Knee
Daniel O'Connell, Yvonne Golightly, Caroline Lisee, Brian Pietrosimone
BACKGROUND: Lower proteoglycan density, as estimated by greater T1ρ magnetic resonance imaging (MRI) relaxation times, may be an indicator of early osteoarthritis development. We examined associations between femoral cartilage inter-limb T1ρ MRI relaxation time ratios and clinically relevant knee symptoms at 12 months following anterior crucial ligament reconstruction (ACLR). METHODS: Twenty-nine individuals completed the Knee Osteoarthritis Outcome Score (KOOS) and underwent MRI 12 months following ACLR for this cross-sectional study...
February 24, 2023: Knee
Keyur B Desai, Kishore Karumuri, Maryada Venkateshwar Reddy, Kushal Hippalgaonkar, Ratnakar V, A V Gurava Reddy
BACKGROUND: Intraoperative periprosthetic fracture (IF) is an under-reported complication in primary total knee arthroplasty (TKA). This study aimed to audit the outcomes and complication rates in patients encountering IF during primary TKA and propose a new classification for its management. METHODS: A nested case-control study was performed at a tertiary referral hospital where 50 patients encountering IF during primary TKA operated by a single surgeon team between January 2016 to May 2021, were compared with 150 (3:1) age-, gender- and implant-matched patients not encountering IF...
February 24, 2023: Knee
Cameron Jrw Simpson, Nathan Ng, Solomon Ndou, Evan Wright, Ngee Jin Yap, Chloe E H Scott, Nick D Clement
BACKGROUND: Modern total knee arthroplasty (TKA) femoral components are designed to provide a more optimal articular surface for the patella whether or not it has been resurfaced. Previous systematic reviews comparing outcomes of patellar resurfacing and no resurfacing combine both historic and modern designs. AIMS: The aim of this study was to investigate the effect of patellar resurfacing in modern "patellar friendly" implants on (1) incidence of anterior knee pain, (2) patient reported outcomes (3) complication rates, and (4) reoperation rates compared with unresurfaced patellae in primary TKA...
February 22, 2023: Knee
Kelvin Naito, Maya Matsumoto, Samantha N Andrews, Kristin Mathews, Cass K Nakasone
BACKGROUND: The removal of total knee arthroplasty (TKA) from the Inpatient-Only list in 2018 created pressure on community hospitals to develop rapid discharge protocols (RAP) to increase outpatient discharge. The purpose of this study, therefore, was to compare the efficacy, safety and barriers in achieving outpatient discharge between the standard discharge protocol and newly developed RAP in unselected, unilateral TKA patients. METHODS: This retrospective chart review included 288 standard protocol patients and the first 289 RAP patients following unilateral TKA in a community hospital...
February 20, 2023: Knee
Thomas H Christensen, Mackenzie A Roof, Ittai Shichman, Katherine A Lygrisse, Vinay K Aggarwal, Matthew Hepinstall, Ran Schwarzkopf
BACKGROUND: Indications for surgery may impact resource utilization in aseptic revision total knee arthroplasty (rTKA), and understanding these relationships would facilitate risk-stratification preoperatively. The purpose of this study was to investigate the impact of rTKA indications on readmission, reoperation, length of stay (LOS), and cost. METHODS: We reviewed all 962 patients who underwent aseptic rTKA at an academic orthopedic specialty hospital between June 2011-April 2020 with at least 90 days of follow-up...
February 20, 2023: Knee
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