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Z Orthop Unfall 2021 May 11. Epub 2021 May 11.

Focal cartilage defects lead to swelling, significant pain and loss of function of the affected joint. Additionally, they are linked to early onset of osteoarthritis. Often young and active patients are especially susceptible due to the high stress placed on their joints. Read More

J Appl Biomech 2021 May 11:1-9. Epub 2021 May 11.

Louisiana Tech University.

Although the dynamics of center of mass can be accounted for by a spring-mass model during hopping, less is known about how each leg joint (ie, hip, knee, and ankle) contributes to center of mass dynamics. This work investigated the function of individual leg joints when hopping unilaterally and vertically at 4 frequencies (ie, 1.6, 2. Read More

J Bone Joint Surg Am 2021 May 11. Epub 2021 May 11.

Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota.

Background: Most North American surgeons predominantly use uncemented stems in primary total hip arthroplasties (THAs) and reserve cemented stems for selected older patients and those with poor bone quality. However, data on this "selective use" strategy for cemented stems in the population at risk for periprosthetic fracture and implant loosening are limited. The purpose of this study was to describe implant survivorship, complications, and radiographic results of a specific collarless, polished, tapered cemented stem (Exeter; Stryker) used selectively in a predominantly elderly population undergoing primary THA. Read More

J Bone Joint Surg Am 2021 May 11. Epub 2021 May 11.

Division of Orthopaedic Surgery, Department of Surgery, Schulich School of Medicine & Dentistry, Western University and London Health Science Centre, London, Ontario, Canada.

Background: The prevalence and outcomes of unexpected positive cultures (UPCs) of specimens taken during presumed aseptic revision total hip arthroplasty (THA) are unclear. The purpose of this study was to determine the prevalence of UPC and infection-free implant survival in this patient population. Secondary aims included identifying factors associated with subsequent infection-related failure in patients with UPC. Read More

Arthritis Care Res (Hoboken) 2021 May 10. Epub 2021 May 10.

Thurston Arthritis Research Center, University of North Carolina, Chapel Hill, NC, USA.

Objective: To determine the incidence and worsening of lumbar spine structure and low back pain (LBP) and whether they are predicted by demographic characteristics or clinical characteristics or appendicular joint osteoarthritis (OA).

Methods: Paired baseline (2003-2004) and follow-up (2006-2010) lumbar spine radiographs from the Johnston County Osteoarthritis Project were graded for osteophytes (OST), disc space narrowing (DSN), spondylolisthesis, and presence of facet joint OA (FOA). Spine OA was defined as at least mild OST and mild DSN at the same level for any level of the lumbar spine. Read More

Arthritis Care Res (Hoboken) 2021 May 10. Epub 2021 May 10.

Pfizer Inc, Groton, Connecticut, USA.

Objective: This pooled analysis of 3 randomized, placebo-controlled trials (16─24 week treatment; 8─24 week follow-up) assessed safety of subcutaneous tanezumab (2.5─10 mg every 8 weeks) in 1840 patients with hip or knee osteoarthritis.

Methods: Overall treatment-emergent adverse events (TEAEs) and TEAEs of abnormal peripheral sensation (APS) were prospectively assessed in 3 trials. Read More

J Orthop 2021 May 6. Epub 2021 May 6.

The Kerlan-Jobe Orthopaedic Clinic, Los Angeles, CA, USA.

The purpose of this study is to report the change in surgical case volume and composition encountered by a multi-subspecialty orthopaedic practice due to COVID-19. We reviewed electronic medical records for patients who had surgery at our institution and collected multiple variables including age and the joint that was operated on. In the post-COVID-19 period, we found a significant increase in the percentage of hip procedures, and a significant decrease in the percentage of hand/wrist procedures. Read More

Sci Rep 2021 May 10;11(1):9836. Epub 2021 May 10.

Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 Xiantai Avenue, Changchun, Jilin, China.

We aimed to evaluate whether there are differences in the rotation center, cup coverage, and biomechanical effects between conventional and anatomical technique. Computed tomography scans of 26 normal hips were used to simulate implantation of acetabular component. The hip rotation center and acetabular component coverage rate were calculated. Read More

Osteoarthritis Cartilage 2021 May 7. Epub 2021 May 7.

Alfred Health, Melbourne VIC, Australia; School of Medicine, Monash University, Subang Jaya Selangor, Malaysia; School of Public Health and Preventive Medicine, Monash University, Australia; Alfred Health, Melbourne VIC, Australia; Department of Epidemiology and Preventative Medicine, Monash University, Melbourne VIC, Australia; Department of Epidemiology and Preventative Medicine, Monash University, Melbourne VIC, Australia; Rheumatologist and Head of Unit, Rheumatology Unit, Alfred Health, Melbourne VIC, Australia. Professor and Head of Unit, Musculoskeletal Unit, Department of Epidemiology and Preventative Medicine, Monash University, Melbourne VIC, Australia; Rheumatologist, Rheumatology Unit, Alfred Health, Melbourne VIC, Australia. Professor, Musculoskeletal Unit, Department of Epidemiology and Preventative Medicine, Monash University, Melbourne VIC, Australia. Electronic address:

Objective: To determine the prevalence of neuropathic-like pain(NP) and pain sensitisation(PS) defined by self-report questionnaires in knee and hip osteoarthritis, and whether prevalence is potentially explained by disease-severity or affected joint.

Design: MEDLINE, EMBASE, CINAHL were systematically searched(1990-April 2020) for studies describing the prevalence of NP and PS in knee and hip osteoarthritis using self-report questionnaires. Random-effects meta-analysis was performed. Read More

PLoS One 2021 10;16(5):e0251175. Epub 2021 May 10.

Department of Physiotherapy, Centre for Health, Exercise and Sports Medicine, School of Health Sciences, Faculty of Medicine Dentistry & Health Sciences, The University of Melbourne, Melbourne, Victoria, Australia.

The development of walking in young toddlers is an important motor milestone. Walking patterns can differ widely amongst toddlers, and are characterised by unique biomechanical strategies. This makes comparisons between newly walking toddler's and older children's walking difficult. Read More

J Am Acad Orthop Surg Glob Res Rev 2020 May;4(5):e1900149

From the Department of Urology (Dr. Abdul-Muhsin, Jakob, Dr. Navaratnam, Dr. Khan, and Dr. Humphreys), Department of Research Biostatistics (Dr. Cha and Dr. Zhang), and the Department of Orthopedic Surgery (Dr. Schwartz), Mayo Clinic Arizona, Phoenix, AZ.

Purpose: To develop a prognostic model to estimate postoperative urinary retention (POUR) after lower limb arthroplasty.

Methods: One thousand two hundred twenty patients underwent 1,374 joint replacement operations (812 knees and 562 hips) between December 2008 and May 2014. Detailed variables were collected. Read More

Arch Orthop Trauma Surg 2021 May 10. Epub 2021 May 10.

Department of Orthopaedic, Trauma and Plastic Surgery, Leipzig University, Liebigstr. 20, 04103, Leipzig, Germany.

Introduction: Atraumatic necrosis of the femoral head (AFHN) is a common disease with an incidence of 5000-7000 middle-aged adults in Germany. There is no uniform consensus in the literature regarding the configuration of the bone in AFHN. The clinical picture of our patients varies from very hard bone, especially in idiopathic findings, and rather soft bone in cortisone-induced necrosis. Read More

World J Clin Cases 2021 Apr;9(12):2838-2844

Department of Critical Care Medicine, Nanping First Hospital Affiliated to Fujian Medical University, Nanping 353000, Fujian Province, China.

Background: Rhabdomyolysis is a serious complication of heat stroke. Unlike that in acute kidney injury, the risk of muscle bleeding in rhabdomyolysis is often ignored and can substantially increase the widespread use of anticoagulants, leading to the formation of intramuscular hematoma.

Case Summary: During the summer, a middle-aged man and an elderly man were diagnosed with heat stroke, rhabdomyolysis, and acute renal impairment. Read More

HSS J 2021 Feb 21;17(1):51-58. Epub 2021 Feb 21.

Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY, USA.

With the increase in technological advances over the years, telehealth services in orthopedic surgery have gained in popularity, yet adoption among surgeons has been slow. With the onset of the COVID-19 pandemic, however, orthopedic surgery practices nationwide have accelerated adaptation to telemedicine. Telehealth can be effectively applied to total joint arthroplasty, with the ability to perform preoperative consultations, postoperative follow-up, and telerehabilitation in a virtual, remote manner with similar outcomes to in-person visits. Read More

J Arthroplasty 2021 Apr 28. Epub 2021 Apr 28.

Department of Orthopaedics, University of Illinois College of Medicine, Chicago, IL.

Background: Patients undergoing total joint arthroplasty (TJA) have an increased likelihood of having an abnormal coagulation profile compared with the general population. Coagulation abnormalities are often screened for before surgery and considered during perioperative planning. This study assesses a preoperative abnormal coagulation profile as a risk factor for postoperative complications after total hip arthroplasty (THA), revision THA (rTHA), total knee arthroplasty (TKA), and revision TKA (rTKA) and then examines specific coagulopathies to determine their influence on complication rates. Read More

Osteoarthritis Cartilage 2021 May 6. Epub 2021 May 6.

Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia. Electronic address:

Objective: The purpose of this study is to describe predictors of total hip replacement (THR) in community dwelling older adults. A better understanding of predictors of THR can aid in triaging patients and researching preventative strategies.

Design: At baseline, participants had assessment of radiographic OA and cam morphology (from pelvic radiographs), shape mode scores and hip bone mineral density (BMD; from dual energy X-ray absorptiometry (DXA)). Read More

J Arthroplasty 2021 Apr 24. Epub 2021 Apr 24.

Orthopaedic Surgery, Ascension Providence Rochester Hospital, Rochester, MI.

Background: Digital patient engagement has been suggested as a mean to increase patient activation and patient satisfaction after total joint arthroplasty. The purpose of this study was to assess patient engagement with application-based educational tools and to explore what content was most useful to patients in the perioperative period surrounding total hip arthroplasty (THA) and total knee arthroplasty (TKA), respectively.

Methods: Patients undergoing THA and TKA between October 2017 and January 2020 were enrolled to use an application-based digital technology. Read More

Arthroscopy 2021 May 5. Epub 2021 May 5.

Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.

Purpose: The aim of this study was to evaluate the association between labral length and radiographic parameters of lateral and anterior acetabular coverage and the femoro-epiphyseal acetabular roof (FEAR) index in patients with developmental dysplasia of the hip (DDH).

Methods: We retrospectively analyzed data from patients with DDH who visited our hip joint clinic for the first time due to hip symptoms. DDH presence was defined as a lateral center-edge angle (LCEA) ≤ 25°. Read More

Nan Fang Yi Ke Da Xue Xue Bao 2021 Apr;41(4):574-578

Department of Anesthesiology, General Hospital of PLA, Beijing 100853, China.

Objective: To detect cerebrospinal fluid levels of amyloid beta- protein 42 (Aβ42) and neurofilament light protein (NFL) and explore their correlation with postoperative neurocognitive dysfunction (PNCD) in elderly patients.

Objective: A total of 90 elderly patients undergoing hip or knee replacement with joint epidural anesthesia in our Hospital between January, 2017 and December, 2018 were recruited in this study. The levels of Aβ42 and NFL in the cerebrospinal fluid were detected using ELISA. Read More

BMC Musculoskelet Disord 2021 May 7;22(1):422. Epub 2021 May 7.

Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China.

Background: Fibrinogen (Fbg) and D-dimer have been used as biomarkers for the diagnosis of periprosthetic joint infection (PJI). However, previous research has reported conflicting results on the diagnostic value of D-dimer in comparison to Fbg, C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR).

Aim: This study aimed to: (1) determine the optimal threshold of plasma Fbg and D-dimer in the diagnosis of PJI and compare their diagnostic value to that of CRP and ESR; and (2) investigate whether Fbg and D-dimer perform differently than CRP and ESR as diagnostic indicators for different types of PJI. Read More

Phys Rev Lett 2021 Apr;126(16):162001

Central China Normal University, Wuhan, China.

The elliptic flow of electrons from beauty hadron decays at midrapidity (|y|<0.8) is measured in Pb-Pb collisions at sqrt[s_{NN}]=5.02  TeV with the ALICE detector at the LHC. Read More

Acta Chir Orthop Traumatol Cech 2021 ;88(2):131-136

Umraniye Training and Research Hospital, Department of Orthopaedics and Traumatology, Umraniye/Istanbul, Turkey.

PURPOSE OF THE STUDY The aim of this study was to investigate the culture results of children undergoing debridement for suspected septic arthritis or acute osteomyelitis and to compare the laboratory parameters and clinical characteristics of culture-positive and culture-negative patients. MATERIAL AND METHODS Patients who underwent surgery in our hospital for septic arthritis and acute osteomyelitis between 2011 and 2019 were retrospectively analyzed. Seventy-two of 96 patients were included in the study. Read More

Acta Chir Orthop Traumatol Cech 2021 ;88(2):95-100

Oddělení ortopedie a traumatologie, AGEL Středomoravská nemocniční a.s., Nemocnice Přerov.

PURPOSE OF THE STUDY The study aimed to evaluate the intraoperative and early postoperative response to simultaneous bilateral femoral osteotomy usually accompanied by soft tissue release of hip joints, or open reduction, capsuloplasty, pelvic osteotomy or extraarticular shelf procedure. MATERIAL AND METHODS A bilateral surgery was performed in 16 children. Twelve children suffered from (spastic) cerebral palsy and there was one case of paralytic dislocation in a patient with myelomeningocele, while the remaining patients suffered from chromosome I aberrations, Dandy-Walker syndrome and merosin-deficient muscular dystrophy. Read More

Arch Orthop Trauma Surg 2021 May 6. Epub 2021 May 6.

Orthopedic Division, Department of Orthopedic Surgery, Affiliated with the Sackler Faculty of Medicine, Tel Aviv Medical Center, Tel Aviv University, 6 Weitzman St., 6423906, Tel Aviv, Israel.

Introduction: Sub-capital femoral fractures (SCFF) are impacted or non-displaced in Garden types 1 and 2, respectively. Non-surgical treatment is protected weight-bearing combined with physiotherapy and radiographic follow-up in selected patients. Traditionally, in situ pinning is the surgical treatment of choice. Read More

Front Med (Lausanne) 2021 20;8:640275. Epub 2021 Apr 20.

Department of Allergy, Immunology and Rheumatology, Chung Shan Medical University Hospital, Taichung, Taiwan.

To determine the trend of incidence rate of total knee arthroplasty (TKA), total hip arthroplasty (THA), and TKA or THA (major joint arthroplasty, MJA) among rheumatoid arthritis (RA) population and compared them with general population (GP) in Taiwan. Incidence rates and trends of TKA, THA, and MJA were determined over a 14-year period (2000-2013) among RA patients and compared them with GP. RA of patients was diagnosed based on the ACR 1987 criteria and extracted from GP. Read More

World J Orthop 2021 Apr 18;12(4):214-222. Epub 2021 Apr 18.

Department of Orthopedic Surgery, NYU Langone Orthopedic Hospital, Hospital for Joint Diseases, New York, NY 10003, United States.

Background: Today, biological fixation of uncemented press-fit acetabular components plays an important role in total hip arthroplasty. Long-term stable fixation of these implants depends on the osseointegration of the acetabular cup bone tissue into the acetabular cup implant, and their ability to withstand functional loads.

Aim: To compare the strength of bone-implant osseointegration of four types of porous metal implants in normal and osteoporotic bone in rabbits. Read More

World J Stem Cells 2021 Apr;13(4):304-316

Department of Orthopedics, the Bone and Cartilage Institute, Indaiatuba, SP 13334-170, Brazil.

Orthobiologics are biological materials that are intended for the regeneration or healing of bone, cartilage and soft tissues. In this review we discuss the use of orthobiologics for hip disorders providing an update. The orthobiologics included in this article are hyaluronic acid, platelet rich plasma, bone marrow, adipose tissue and expanded mesenchymal stem cells. Read More

Front Psychol 2021 20;12:623037. Epub 2021 Apr 20.

Department of Psychology, University of British Columbia, Vancouver, BC, Canada.

Older adults often have long-term relationships, and many of their goals are intertwined with their respective partners. Joint goals can help or hinder goal progress. Little is known about how accurately older adults assess if a goal is joint, the role of over-reporting in these perceptions, and how joint goals and over-reporting may relate to older partners' relationship satisfaction and physical health (operationally defined as allostatic load). Read More

Ortop Traumatol Rehabil 2021 Apr;23(2):115-120

Djavad Mowafaghian Research Center of Intelligent Neuro-rehabilitation Technologies, Sharif University of Technology, Tehran, Iran.

Background: Medial thrust (MT) gait is a nonsurgical approach for reducing the knee adduction moment (KAM) in patients with knee osteoarthritis. However, its usefulness is indeterminate due to scarcity of research about changes in lower extremity kinetics and the ground reaction force (GRF) which have been investigated in this study.

Materials And Methods: Twenty patients (6 males, 14 females, age: 56. Read More

Ortop Traumatol Rehabil 2021 Apr;23(2):101-113

Klinika Ortopedii i Ortopedii Dziecięcej Centralnego Szpitala Klinicznego w Łodzi, Polska / Department of Orthopaedics and Pediatric Orthopaedics, Central Teaching Hospital of Medical University in Lodz, Poland.

Background: Rehabilitation following major joint replacement surgery is an extremely important part of complementary treatment after the surgical procedure. To obtain the best final treatment outcome possible, apart from improvements in surgical technique, new methods of rehabilitation are still being sought and implemented to increase its effectiveness, safety and patient comfort. One such technique is vibroacoustic therapy, a method of treatment based on the direct transmission of audible sound vibrations through a sound transmitter to the patient's body. Read More