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Hum Mov Sci 2019 Jan 16;64:67-74. Epub 2019 Jan 16.

28 Division St, Kingston, Ontario K7L 3N6, Canada. Electronic address:

With the goal of reducing injury and enhancing performance, movement screening tools score an individual's movements against a standard and because it is a predictor of injury symmetry is often included in the score. Movement quality screening tools only consider kinematic asymmetry, which may underestimate the degree of asymmetry present during movement. Consider joint forces: if these forces are atypical, additional stress is created and control is reduced, which can lead to injury if the asymmetry is not addressed. Read More

Int Orthop 2019 Jan 18. Epub 2019 Jan 18.

Department of Trauma and Orthopedic Surgery, Berufsgenossenschaftliche Unfallklinik Frankfurt am Main, Friedberger Landstr. 430, 60389, Frankfurt am Main, Germany.

Introduction: There is no gold standard for performing a two-stage exchange arthroplasty to treat periprosthetic joint infection (PJI). The use of spacers and the anchorage principles of the revision prosthesis remain controversial. Herein, we report the success rate of a two-stage total hip replacement procedure without using a spacer and only pressfit cementless implants. Read More

Med Sci Monit 2019 Jan 18;25:525-531. Epub 2019 Jan 18.

Department of Anesthesiology and Intensive Therapy, Military Institute of Medicine, Warsaw, Poland.

BACKGROUND The incidence of postoperative cognitive dysfunction (POCD) after major joint arthroplasty is high. In the etiology of POCD, many factors have been cited, including thromboembolic complications. The incidence of cerebral embolization after lower extremity arthroplasty may be as high as 40-60%. Read More

Arch Orthop Trauma Surg 2019 Jan 17. Epub 2019 Jan 17.

Department of Knee, Hip and Shoulder Surgery, Schön Clinik Munich-Harlaching, Academic Teaching Hospital of the Paracelsus Private Medical University Salzburg, Strubergasse 21, 5020, Salzburg, Austria.

Introduction: Arthrofibrosis (AF) is the result of increased cell proliferation and synthesis of matrix proteins (collagen I, III, and VI). Especially after invasive knee surgery, e.g. Read More

J Am Acad Orthop Surg Glob Res Rev 2018 Nov 7;2(11):e072. Epub 2018 Nov 7.

Department of Orthopaedics, Adult Reconstruction Section, University of California: Davis Medical Center, Sacramento, CA.

Introduction: Since the advent of antifibrinolytics, blood transfusions and their associated complications in total joint arthroplasty have decreased. Few studies have compared different antifibrinolytic types with respect to blood loss and transfusion rates. We sought to compare the blood loss and transfusion rates between epsilon-aminocaproic acid (EACA), tranexamic acid (TXA), and control. Read More

J Am Acad Orthop Surg Glob Res Rev 2018 Oct 16;2(10):e058. Epub 2018 Oct 16.

Anesthesiology, Critical Care, and Pain Management (Dr. Yang, Dr. Hong, Dr. Kim, Dr. Memtsoudis, and Dr. Liu), Hospital for Special Surgery, Weill Cornell Medical Center and the Department of Orthopedic Surgery (Dr. Gonzalez Della Valle, and Dr. Ranawat), Hospital for Special Surgery, Weill Cornell Medical Center, New York, NY.

Introduction: Joint arthroplasty practice is highly dynamic to adapt to economic changes and advances in medicine. This study provides updates of the current perioperative practice on healthcare resource utilization.

Methods: The study included total knee arthroplasty, total hip arthroplasty, and total shoulder arthroplasty within the healthcare cost and utilization project New York State database from 2007 to 2013 (ie, 202,100, 127,872, and 8858 cases, respectively). Read More

J Orthop 2019 Jan-Feb;16(1):97-100. Epub 2019 Jan 4.

Department of Orthopaedic Surgery and Rehabilitation Medicine, SUNY Downstate Medical Center, Brooklyn, NY, USA.

Objective: This study evaluated incidence over time, any association between race and demographics, and hospital-related parameters in pediatric patients with septic hip or knee arthritis.

Methods: The Kids' Inpatient Database was used to identify all children with a diagnosis of septic hip or knee arthritis who underwent incision and drainage (1997-2012).

Results: Between 1997 and 2012, overall incidence of septic arthritis of the knee (0. Read More

Acta Orthop Traumatol Turc 2019 Jan 14. Epub 2019 Jan 14.

Department of Medical Biology, Gazi University Faculty of Medicine, Ankara, Turkey.

Purpose: The aim of this study is to investigate which ADAMTS genes play a major role in the development of primary hip osteoarthritis, by comparing the tissue and blood samples in patients with hip osteoarthritis and a control group.

Material And Methods: Human articular cartilage was obtained from femoral heads of 15 patients with end stage osteoarthritis undergoing total hip replacement. As the control group, the cartilages was obtained from femoral heads of 15 patients, who did not have osteoarthritis or degenerative changes in hip joint, undergoing hip replacement following the fracture of the femoral neck. Read More

Hum Factors 2019 Jan 17:18720818819951. Epub 2019 Jan 17.

University of Utah, Salt Lake City, USA.

Objective:: To evaluate the differences between walking on an advanced robotic locomotion interface called the Treadport and walking overground with healthy subjects.

Background:: Previous studies have compared treadmill-based and overground walking in terms of gait parameters. The Treadport's unique features including self-selected speed capability, large belt, kinesthetic force feedback, and virtual reality environment distinguish it from other locomotion interfaces and could provide a natural walking experience for the users. Read More

PLoS One 2019 17;14(1):e0210807. Epub 2019 Jan 17.

Department of Biomedical Engineering, University of Strathclyde, Glasgow, United Kingdom.

Functional methods identify joint centres as the centre of rotation (CoR) of two adjacent movements during an ad-hoc movement. The methods have been used for functionally determining hip joint centre in gait analysis and have revealed advantages compared to predictive regression techniques. However, the current implementation of functional methods hinders its application in clinical use when subjects have difficulties performing multi-plane movements over the required range. Read More

Medicine (Baltimore) 2019 Jan;98(3):e14071

Department of Orthopedics, Artificial Joints Engineering and Technology Research Center of Jiangxi Province, The First Affiliated Hospital of Nanchang University, China.

Rationale: Periprosthetic osteolysis secondary to septic loosening and aseptic loosening is a well-described phenomenon associated with artificial hip arthroplasty. Periprosthetic bone loss as a result of metastatic infiltration is an uncommon cause of early, progressive loosening of joint replacement prosthesis and is rarely described in the literature.

Patient Concerns: The present study describes a 70-year-old male patient who was diagnosed with pulmonary squamous cell carcinoma 5 years after total hip arthroplasty (THA) and developed a metastasis from squamous cell carcinoma in the periprosthetic neosynovial tissue 1 year after formal chemotherapy. Read More

J Bone Joint Surg Am 2019 Jan;101(2):177-184

Departments of Clinical Anatomy (M.T. and K.A.) and Functional Joint Anatomy (A.N.), Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.

Background: Gluteus medius tears are a common hip disorder. Despite this, the etiology of these tears and the anatomical background of the gluteus medius tendon remain unclear. This study aimed to clarify the characteristics of the gluteus medius tendon. Read More

J Bone Joint Surg Am 2019 Jan;101(2):169-176

Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, and Department of Clinical Research, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.

Background: The dual mobility acetabular cup (DMC) was designed to reduce prosthetic instability and has gained popularity for both primary and revision total hip arthroplasty (THA). We compared the risk of revision of primary THA for primary osteoarthritis between patients treated with a DMC and those who received a metal-on-polyethylene (MoP) or ceramic-on-polyethylene (CoP) bearing.

Methods: A search of the Nordic Arthroplasty Register Association (NARA) database identified THAs performed with a DMC during 1995 to 2013. Read More

J Bone Joint Surg Am 2019 Jan;101(2):152-159

Department of Surgery and Perioperative Care, Dell Medical School at the University of Texas, Austin, Texas.

Background: Despite increasing interest in total joint arthroplasty registries, evidence of the impact of physician-level performance on the value of care provided to patients undergoing hip and knee arthroplasty is lacking. The purpose of this study was to examine the effectiveness of an unblinded orthopaedic surgeon-specific value scorecard in improving patient outcomes and reducing hospital costs.

Methods: We retrospectively analyzed patient outcomes and hospital costs associated with total joint arthroplasties before and 9 months after the introduction of a Surgeon Value Scorecard at an urban tertiary care center. Read More

J Bone Joint Surg Am 2019 Jan;101(2):145-151

Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois.

Background: Digital patient engagement platforms are designed to improve the efficacy of the perioperative surgical home, but the currently available solutions have shown low patient and provider adoption. The purpose of this study was to evaluate the effectiveness of a text-messaging (Short Message Service [SMS]) bot with respect to patient engagement following joint replacement procedures in a randomized clinical trial.

Methods: One hundred and fifty-nine patients (83 patients in the control group and 76 patients in the intervention group) were enrolled in a randomized controlled trial comparing the effectiveness of an SMS bot (intervention group) with the traditional perioperative education process (control group) in patients undergoing primary total knee or hip arthroplasty. Read More

J Bone Joint Surg Am 2019 Jan;101(2):136-144

Department of Orthopaedic Surgery (F.C.D., S.B., and S.E.U.) and Health Services Research Unit (J.S.B.), Akershus University Hospital, Lørenskog, Norway.

Background: Elderly patients with a displaced femoral neck fracture treated with hip arthroplasty may have better function than those treated with internal fixation. We hypothesized that hemiarthroplasty would be superior to screw fixation with regard to hip function, mobility, pain, quality of life, and the risk of a reoperation in elderly patients with a nondisplaced femoral neck fracture.

Methods: In a multicenter randomized controlled trial (RCT), Norwegian patients ≥70 years of age with a nondisplaced (valgus impacted or truly nondisplaced) femoral neck fracture were allocated to screw fixation or hemiarthroplasty. Read More

Rev Soc Bras Med Trop 2019 Jan 14;52:e20180253. Epub 2019 Jan 14.

Departamento de Pediatria, Faculdade de Ciências Médicas da Universidade Estadual de Campinas, Campinas, SP, Brasil.

An eleven-year-old boy presented with fever and hip pain, with limited mobility of the right side of the hip. Computed tomography scan revealed an increased volume of the right coxo-femoral joint, requiring surgical drainage of purulent secretion, from which Salmonella enterica was isolated. After four weeks of treatment with third-generation cephalosporin, he was discharged with a favorable evolution. Read More

J Knee Surg 2019 Jan 16. Epub 2019 Jan 16.

Department of Joint Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China.

The effect of residual varus on survival rate and function in patients with varus knee osteoarthritis (OA) was considered an important issue for successful primary total knee arthroplasty (TKA). In this study, we compared the midterm clinical and functional outcomes in patients with different residual varus. A retrospective review of 175 patients (219 knees) with varus OA was > 3° for the hip-knee-ankle (HKA) who underwent primary TKA after exclusions and loss to follow-up from 237 patients (281 knees). Read More

J Perioper Pract 2019 Jan 16:1750458919825812. Epub 2019 Jan 16.

1 Division of Trauma & Orthopaedics Surgery Addenbrooke's Hospital, University of Cambridge, Cambridge, UK.

Total Joint arthroplasty is associated with significant blood loss, which could necessitate the use of blood transfusion. Several techniques are being utilised to limit the volume of blood loss, in order to avoid transfusion. In this review, we look at blood loss in total joint arthroplasty, and the perioperative strategies to limit the loss of blood. Read More

Eur J Orthop Surg Traumatol 2019 Jan 16. Epub 2019 Jan 16.

Zuyderland Medical Centre, Sittard-Geleen, The Netherlands.

Background: Low-dose radiotherapy (LDRT) for pain reduction in osteoarthritis (OA) is a frequently used treatment in Germany and Eastern European countries. The evidence on the effects of LDRT on pain in patients with OA remains unclear. This study evaluated the effect of LDRT on pain in patients with severe OA of the hip or knee joint. Read More

Radiologe 2019 Jan 16. Epub 2019 Jan 16.

Radiologisches Zentrum München (RZM), Pippingerstr. 25, 81245, München, Deutschland.

Background: Since the first description of the femoroacetabular impingement (FAI) concept diagnostic imaging of FAI has continuously been developed.

Objective: The biomechanical concept is explained and an update on diagnostic imaging of FAI is presented.

Material And Methods: Based on a literature search this review article presents the current state of knowledge about FAI mechanisms and gives an overview on state of the art radiological diagnostics. Read More

Rheumatology (Oxford) 2019 Jan 10. Epub 2019 Jan 10.

Pharmaco- and Device-Epidemiology Group, Centre for Statistics in Medicine, NDORMS, University of Oxford, Oxford.

Objectives: Previous ecological data suggest a decline in the need for joint replacements in RA patients following the introduction of TNF inhibitor (TNFi) therapy, although patient-level data are lacking. Our primary aim was to estimate the association between TNFi use and subsequent incidence of total hip replacement (THR) and total knee replacement.

Methods: A propensity score matched cohort was analysed using the British Society for Rheumatology Biologics Registry (2001-2016) for RA data. Read More

Pain Med 2019 Jan 12. Epub 2019 Jan 12.

The Parker Institute, Copenhagen University Hospital Bispebjerg-Frederiksberg, Copenhagen, Denmark.

Objective: To investigate differences in gait variability induced by two different single-dose opioid formulations and an inert placebo in healthy volunteers and knee osteoarthritis patients.

Design: Experimental, randomized, double-blinded, crossover study of inert placebo (calcium tablets), 50 mg of tapentadol, and 100 mg of tramadol.

Setting: Laboratory setting. Read More

Ortop Traumatol Rehabil 2018 Aug;20(4):245-256

Akademia Wychowania Fizycznego we Wrocławiu, Wydział Wychowania Fizycznego, Katedra Biomechaniki,Wrocław, Polska / Academy of Physical Education in Wrocław, Faculty of Physical Education, Department of Biomechanics, Wroclaw, Poland.

The aim of this paper is to present the current state of research on gait parameters in people after unilateral amputation above the knee joint and to compare these gait parameters with those of healthy people. The relevant literature does not include any similar publications. Modern prostheses do not eliminate the asymmetry of gait, although its consequences are diminished. Read More

Bone Joint J 2019 Jan;101-B(1_Supple_A):25-31

Joint Implant Surgeons, Inc., White Fence Surgical Suites, and Mount Carmel Health System, New Albany, Ohio, USA.

Aims: Despite declining frequency of blood transfusion and electrolyte supplementation following total joint arthroplasty, postoperative blood analyses are still routinely ordered for these patients. This study aimed to determine the rate of blood transfusion and electrolyte restoration in arthroplasty patients treated with a perioperative blood conservation protocol and to identify risk factors that would predict the need for transfusion and electrolyte supplementation.

Patients And Methods: Patients undergoing primary total joint arthroplasty of the hip or knee between July 2016 and February 2017 at a single institution were included in the study. Read More

Bone Joint J 2019 Jan;101-B(1_Supple_A):41-45

Complex Joint Reconstruction Center, Hospital for Special Surgery, New York, New York, USA.

Aims: Instability continues to be a troublesome complication after total hip arthroplasty (THA). Patient-related risk factors associated with a higher dislocation risk include the preoperative diagnosis, an age of 75 years or older, high body mass index (BMI), a history of alcohol abuse, and neurodegenerative diseases. The goal of this study was to assess the dislocation rate, radiographic outcomes, and complications of patients stratified as high-risk for dislocation who received a dual mobility (DM) bearing in a primary THA at a minimum follow-up of two years. Read More

Bone Joint J 2019 Jan;101-B(1_Supple_A):11-18

University College London Hospitals, The Princess Grace Hospital, and The NIHR Biomedical Research Centre at UCLH, London, UK.

Objectives: The primary objective of this study was to compare accuracy in restoring the native centre of hip rotation in patients undergoing conventional manual total hip arthroplasty (THA) versus robotic-arm assisted THA. Secondary objectives were to determine differences between these treatment techniques for THA in achieving the planned combined offset, component inclination, component version, and leg-length correction.

Materials And Methods: This prospective cohort study included 50 patients undergoing conventional manual THA and 25 patients receiving robotic-arm assisted THA. Read More

Bone Joint J 2019 Jan;101-B(1_Supple_A):32-40

Department of Orthopedic Surgery, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Missouri, USA.

Aims: Surface replacement arthroplasty (SRA), compared with traditional total hip arthroplasty (THA), is more expensive and carries unique concern related to metal ions production and hypersensitivity. Additionally, SRA is a more demanding procedure with a decreased margin for error compared with THA. To justify its use, SRA must demonstrate comparable component survival and some clinical advantages. Read More

Bone Joint J 2019 Jan;101-B(1_Supple_A):3-9

Department of Orthopaedic Surgery, Carolinas Medical Center, Charlotte, North Carolina, USA and OrthoCarolina Hip and Knee Center, Charlotte, North Carolina, USA.

Aims: Prosthetic joint infection (PJI) remains a serious complication that is associated with high morbidity and costs. The aim of this study was to prepare a systematic review to examine patient-related and perioperative risk factors that can be modified in an attempt to reduce the rate of PJI.

Materials And Methods: A search of PubMed and MEDLINE was conducted for articles published between January 1990 and February 2018 with a combination of search terms to identify studies that dealt with modifiable risk factors for reducing the rate of PJI. Read More

Bone Joint J 2019 Jan;101-B(1_Supple_A):19-24

University College London Hospitals, The Princess Grace Hospital, and The NIHR Biomedical Research Centre at UCLH, London, UK.

Aims: Prosthetic joint infections (PJIs) of the hip and knee are associated with significant morbidity and socioeconomic burden. We undertook a systematic review of the current literature with the aim of proposing criteria for the selection of patients for a single-stage exchange arthroplasty in the management of a PJI.

Material And Methods: A comprehensive review of the current literature was performed using the OVID-MEDLINE, EMBASE, and Cochrane Library databases and the search terms: infection and knee arthroplasty OR knee revision OR hip arthroplasty OR hip revision, and one stage OR single stage OR direct exchange. Read More

J Hip Preserv Surg 2018 Dec 31;5(4):443-447. Epub 2018 Oct 31.

Minimal Invasive Orthopedics Unit, Tel-Aviv Sourasky Medical Center, Tel-Aviv, Israel.

This report presents a case of a 37-year-old female with a history of hip pain. Magnetic resonance arthrography revealed loose bodies within the joint and synovial hypertrophy indicative of synovial chondromatosis (SC). Hip arthroscopy revealed free chondral bodies and focal villonodular synovial proliferation. Read More

J Hip Preserv Surg 2018 Dec 1;5(4):435-442. Epub 2018 Dec 1.

Department of Orthopaedics, University of Colorado School of Medicine, Aurora, CO, USA.

While radiographic findings of frank hip dysplasia are well defined, there is a lack of diagnostic criteria for patients with radiographically 'normal' hips who have borderline morphologic deficits and clinical instability. In this study, we aim to define and validate a new radiographic finding associated with hip instability known as the upsloping lateral sourcil (ULS). Patients (316) were reviewed for lateral center edge angles, generalized joint laxity assessed with the Beighton Hypermobility Score and the presence of the ULS. Read More

J Hip Preserv Surg 2018 Dec 26;5(4):425-434. Epub 2018 Nov 26.

Rothman Institute, 925 Chestnut Street, 5th Floor, Philadelphia, PA, USA.

Ptosis is a newly described phenomenon appearing on AP radiographs of patients undergoing femoroacetabular osteoplasty (FAO), and refers to a reverse break down in Shenton's Line. Thorough characterization of this phenomenon is needed to better understand the hip morphology and pathologic ramifications. Our goal was to define the radiographic hip parameters accompanying a break down in Shenton's Line and to determine how these values compare with standard values in normal hips. Read More

J Rheumatol 2019 Jan 15. Epub 2019 Jan 15.

From the Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, and UK National Institute for Health Research (NIHR) Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford; Institute of Translational Medicine, University of Liverpool, Liverpool; Faculty of Health and Medical Sciences, University of Surrey, Guildford; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; NIHR Leeds Biomedical Research Centre, Leeds, UK; Department of Medicine, Faculty of Medicine, and Institute of Health Policy, Management, and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto; Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa; Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada; Institute of Bone and Joint Research, Department of Rheumatology, School of Medicine, University of Sydney and Royal North Shore Hospital; Inner West Psychology; School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, Australia; Department of Epidemiology and Biostatistics, Amsterdam University Medical Centers, location VUmc; Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health, Amsterdam; Departments of Rheumatology and Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands; Musculoskeletal Statistics Unit, the Parker Institute, Bispebjerg and Frederiksberg Hospital, and Department of Rheumatology, Odense University Hospital; Center for Muscle and Joint Health, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark; Université de Lorraine, Approches Épidémiologiques et Psychologiques (APEMAC), Nancy, France; Division of Rheumatology, Allergy and Immunology, Thurston Arthritis Research Center, University of North Carolina, Chapel Hill, North Carolina; Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine, Chicago, Illinois; Sections of Clinical Epidemiology and Rheumatology, Boston University School of Medicine, Boston, Massachusetts; TissueGene Inc., Rockville; Division of Rheumatology and Clinical Immunology, Department of Medicine and Division of Gerontology, Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA; Merck Biopharma, Merck KGaA, Darmstadt; University Pain Centre, University Hospital Carl Gustav Carus, Dresden, Germany; Department of Regenerative Medicine, State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania; Faculty of Humanities and Social Sciences, University of Lucerne, Lucerne, Switzerland. This research was supported by the NIHR Oxford Biomedical Research Centre (T.O. Smith) and the NIHR Leeds Biomedical Research Centre (Prof. Conaghan). The views expressed are those of the authors and not necessarily those of the UK National Health Service, the NIHR, or the Department of Health. T.O. Smith, PhD, Senior Researcher in Rehabilitation, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, and NIHR Oxford Biomedical Research Centre, John Radcliffe Hospital; G.A. Hawker, PhD, Professor of Medicine, Department of Medicine, Faculty of Medicine, and Institute of Health Policy, Management, and Evaluation, Dalla Lana School of Public Health, University of Toronto; D.J. Hunter, PhD, Florance and Cope Chair of Rheumatology, Chair of Institute of Bone and Joint Research, Professor of Medicine, Institute of Bone and Joint Research, Florance and Cope Professorial Department of Rheumatology, School of Medicine, University of Sydney and Royal North Shore Hospital; L.M. March, PhD, Liggins Professor of Rheumatology and Musculosketal Epidemiology Medicine, Institute of Bone and Joint Research, Florance and Cope Professorial Department of Rheumatology, School of Medicine, University of Sydney and Royal North Shore Hospital; M. Boers, PhD, Professor of Clinical Epidemiology, Department of Epidemiology and Biostatistics, Amsterdam University Medical Centers; B.J. Shea, PhD, Adjunct Professor, Ottawa Hospital Research Institute; R. Christensen, PhD, Professor of Biostatistics and Clinical Epidemiology, Musculoskeletal Statistics Unit, the Parker Institute, Bispebjerg and Frederiksberg Hospital, and Department of Rheumatology, Odense University Hospital; F. Guillemin, PhD, Professor of Epidemiology and Public Health, Université de Lorraine, APEMAC; C.B. Terwee, PhD, Associate Professor in Clinimetrics, Department of Epidemiology and Biostatistics, Amsterdam University Medical Centers, location VUmc; P.R. Williamson, PhD, Professor of Medical Statistics, Institute of Translational Medicine, University of Liverpool; S. Dodd, PhD, Lecturer in Biostatistics, Institute of Translational Medicine, University of Liverpool; E.M. Roos, PhD, Professor, Head of Research Unit, Center for Muscle and Joint Health, Department of Sports Science and Clinical Biomechanics, University of Southern Denmark; R.F. Loeser, MD, Herman and Louise Smith Distinguished Professor of Medicine, Division of Rheumatology, Allergy and Immunology, Thurston Arthritis Research Center, University of North Carolina; T.J. Schnitzer, PhD, Professor of Physical Medicine and Rehabilitation, Anesthesiology and Medicine (Rheumatology), Department of Physical Medicine and Rehabilitation, Northwestern University Feinberg School of Medicine; M. Kloppenburg, PhD, Professor in Rheumatology, Departments of Rheumatology and Clinical Epidemiology, Leiden University Medical Centre; T. Neogi, PhD, Professor, Sections of Clinical Epidemiology and Rheumatology, Boston University School of Medicine; C.H. Ladel, PhD, Clinical Biomarker and Diagnostics Lead, Merck Biopharma, Merck KGaA; G. Kalsi, MD, Chief Medical Officer, Senior Vice President of Clinical Development and Regulatory and Medical Affairs, TissueGene Inc.; U. Kaiser, PhD, Principal Investigator, University Pain Centre, University Hospital Carl Gustav Carus; T.W. Buttel, MA, Psychologist, Inner West Psychology, Sydney, Australia, and Institute of Bone and Joint Research, Florance and Cope Professorial Department of Rheumatology, School of Medicine, University of Sydney and Royal North Shore Hospital; A.E. Ashford, PhD, Emeritius Professor, School of Biological, Earth and Environmental Sciences, University of New South Wales; A. Mobasheri, DPhil, Professor of Musculoskeletal Physiology, Faculty of Health and Medical Sciences, University of Surrey, and Department of Regenerative Medicine, State Research Institute Centre for Innovative Medicine; N.K. Arden, MD, Professor in Rheumatic Diseases, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford; A. Tennant, PhD, Permanent Visiting Professor, Faculty of Humanities and Social Sciences, University of Lucerne; M.C. Hochberg, MD, Professor of Medicine and Epidemiology and Public Health, Division of Rheumatology and Clinical Immunology, Department of Medicine and Division of Gerontology, Department of Epidemiology and Public Health, University of Maryland School of Medicine; M. de Wit, PhD, Visiting Fellow, Amsterdam University Medical Centre, Department of Medical Humanities, Amsterdam Public Health; P. Tugwell, PhD, Division of Rheumatology, Department of Medicine, and School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, and Clinical Epidemiology Program, Ottawa Hospital Research Institute; P.G. Conaghan, PhD, Professor of Musculoskeletal Medicine, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre. Address correspondence to Professor P.G. Conaghan, Leeds Institute of Rheumatic and Musculoskeletal Medicine, Chapel Allerton Hospital, Chapeltown Road, Leeds, LS4 7SA, UK. E-mail: Requests can be made to the corresponding author for access to data relating to the work conducted. Accepted for publication December 3, 2018.

Objective: To update the 1997 OMERACT-OARSI (Outcome Measures in Rheumatology-Osteoarthritis Research Society International) core domain set for clinical trials in hip and/or knee osteoarthritis (OA).

Methods: An initial review of the COMET database of core outcome sets (COS) was undertaken to identify all domains reported in previous COS including individuals with hip and/or knee OA. These were presented during 5 patient and health professionals/researcher meetings in 3 continents (Europe, Australasia, North America). Read More

Vet Comp Orthop Traumatol 2019 Jan 15;32(1):67-72. Epub 2019 Jan 15.

Department of Genetics, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.

Objective:  The aim of this study was to evaluate the repeatability and reproducibility of the radiographical stress technique using the Vezzoni-modified Badertscher distension device (VMBDD).

Materials And Methods:  Stress radiographs of 10 dogs obtained with the VMBDD were performed consecutively by two different operators and then measured twice by a third veterinarian. The technical repeatability was first assessed individually for the two operators who took the stress radiographs, followed by the technical reproducibility. Read More

JAMA Netw Open 2018 Sep 7;1(5):e181924. Epub 2018 Sep 7.

Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden.

Importance: The associations of a family history of venous thromboembolism (FH-VTE) with postoperative venous thromboembolism (VTE) and major bleeding after joint replacement surgical procedures are unknown.

Objective: To determine the risk of VTE and major bleeding in patients after primary hip or knee replacement surgical procedures.

Design, Setting, And Participants: Cohort study using nationwide population-based databases of Swedish patients without a history of VTE who underwent joint replacement surgical procedures. Read More

J Biol Regul Homeost Agents 2018 Nov-Dec;32(6 Suppl. 1):201-207

Hip Department, IRCCS Istituto Ortopedico Galeazzi, Milan, Italy.

Rapidly progressive osteoarthritis (RPOA) is an uncommon subset of osteoarthritis (OA) characterized by rapid joint degeneration and destruction. The treatment of choice for these patients has traditionally been total hip arthroplasty (THA) because nonoperative treatments modalities are not effective. RPOA can lead to acetabular bone loss and consequently intraoperative technical difficulties making joint reconstruction in such patients a challenge for the surgeon. Read More

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2019 Jan;33(1):18-22

Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041,

Objective: To investigate the procedure and effectiveness of total femoral replacement for treating femur malignant tumor.

Methods: The clinical data of 9 patients with femoral malignant tumors who underwent total femoral replacement between July 2013 and March 2017 were retrospectively analyzed. There were 5 males and 4 females, aged 16-75 years with an average of 44. Read More

Eur Cell Mater 2019 01 14;37:16-22. Epub 2019 Jan 14.

Charité - Universitätsmedizin Berlin, Centre for Musculoskeletal Surgery, Mittelallee 4, D-13353 Berlin,

Microorganisms' ability to adhere and form a biofilm differs among biomaterials; however, clinical data are conflicting. Microbial adherence and biofilm formation on different biomaterials of explanted joint prosthesis components were investigated. Consecutive patients with explanted joint prosthesis were prospectively included. Read More

Mo Med 2018 Nov-Dec;115(6):537-541

Gregory R. Galakatos, MD, MSMA member since 1997, is the Missouri Medicine Editorial Board member for Orthopaedic Surgery. He practices at the Mercy Clinic in Orthopaedic Surgery in St. Louis, Missouri.

The direct anterior approach to the hip for total joint arthroplasty has been suggested to have several advantages compared to other popular approaches through its use of a natural intramuscular and intra-nervous interval. Recent emphasis on tissue sparing and minimally invasive outpatient joint replacements has given rise to a significant increase in the utilization of direct anterior total hip arthroplasty (DAA). Proponents of this approach cite improved recovery times, lower pain levels, improved patient satisfaction as well as improved accuracy on both implant placement/alignment and leg length restoration. Read More

J Vet Med Sci 2019 Jan 15. Epub 2019 Jan 15.

Department of Veterinary Surgery and Anestesiology, Faculty of Veterinary Medicine, Universidade do Oeste Paulista.

The aim of this study was to evaluate the efficacy and safety of the intra-articular (IA) injection of botulinum toxin type A (BoNT/A) to the management of chronic pain in dogs. In a randomized, controlled, double-blinded study sixteen dogs with osteoarthritis secondary to hip dysplasia were distributed into two groups: 25 IU BoNT/A (BoNT) or saline solution (Control) was administered IA in each affected joint. All dogs received oral supplements (90 days) and carprofen (15 days). Read More

J Arthroplasty 2018 Dec 25. Epub 2018 Dec 25.

Missouri Bone & Joint Research Foundation, St. Louis, MO; Signal Medical Corporation, Marysville, MI.

Background: Zirconia-toughened alumina (ZTA) used in hip arthroplasty contains yttria-stabilized zirconia (Y-TZP) as a toughening agent. However, Y-TZP is well known to degrade in vivo from tetragonal to monoclinic phase transformation. The stability of never-implanted ZTA femoral heads was evaluated in a severe artificial aging test, with retrieved ZTA heads also evaluated for clinical relevance. Read More

J Arthroplasty 2018 Dec 24. Epub 2018 Dec 24.

Department of Orthopaedic Surgery, University of California Davis Medical Center, Sacramento, CA.

Background: We sought to understand the mortality rate of periprosthetic joint infection (PJI) of the hip undergoing 2-stage revision for infection.

Methods: Database search, yielding 23 relevant studies, totaled 19,169 patients who underwent revision for total hip PJI.

Results: One-year weighted mortality rate was 4. Read More

J Arthroplasty 2018 Dec 22. Epub 2018 Dec 22.

Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St. Louis, MO; Division of Infectious Diseases, Department of Medicine, Center for Administrative Data Research, Washington University School of Medicine, St. Louis, MO.

Background: Although Medicaid expansion has improved access to primary care services, its impact on surgical specialty utilization remains unclear. The aim of this study is to determine whether Medicaid expansion is associated with increased utilization rates of total hip arthroplasty (THA) and total knee arthroplasty (TKA) in Illinois (which expanded Medicaid) relative to Missouri (which did not expand Medicaid).

Methods: Using administrative data sources, we analyzed 374,877 total hospitalizations (236,333 in Illinois and 138,544 in Missouri) for THA/TKA from 2011 to 2016 (Illinois' Medicaid expansion date: January 1, 2014). Read More

J Orthop Surg Res 2019 Jan 14;14(1):19. Epub 2019 Jan 14.

Department of Orthopedics, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Changsha, 410008, Hunan, China.

Background: It is challenging to create an ideal artificial acetabulum during total hip arthroplasty (THA) in adult DDH. Our team developed a new patient-specific instrument (PSI) that uses the superolateral rim of the acetabulum as a positioning mark to assist in the production of an artificial acetabulum in adult Crowe II/III DDH patients. The purpose of this retrospective study is to verify whether this new PSI can be used to implement the preoperative plan accurately and quickly to create an ideal artificial acetabulum during THA in adult Crowe II/III DDH patients. Read More

BMC Infect Dis 2019 Jan 14;19(1):50. Epub 2019 Jan 14.

Laboratory of Clinical Microbiology and Infectious Diseases, Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing, China.

Background: Hip replacement is generally conducted in those with prolonged arthritis pain or hip fractures, and postoperative infection is a serious complication. Mycoplasma hominis, belonging to mycoplasma species, exists mainly in the genitourinary tract. M. Read More

Reg Anesth Pain Med 2019 Jan;44(1):7-11

Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois, USA.

Gait Posture 2019 Jan 7;68:545-554. Epub 2019 Jan 7.

Department of Physical Therapy & Athletic Training, PhD Program in Rehabilitation Sciences, College of Health & Rehabilitation Sciences: Sargent College, Boston University, 635 Commonwealth Ave., Boston, MA, United States.

Background: Individuals with developmental dysplasia of the hip (DDH) often report hip pain and exhibit gait adaptations. Previous studies in this patient population have focused on average kinematic and acceleration measures during gait, but have not examined variability.

Research Question: Do individuals with hip pain and DDH have altered kinematic variability or local dynamic stability (LDS) compared to individuals without hip pain?

Methods: Twelve individuals with hip pain and DDH and 12 matched controls walked for two minutes on a treadmill at three speeds: preferred, fast (25% faster than preferred), and prescribed (1. Read More

Surgeon 2019 Jan 10. Epub 2019 Jan 10.

Department of Trauma and Orthopaedic Surgery, Tallaght Hospital, Dublin 24, Ireland. Electronic address:

Introduction: The increasing incidence of acetabular fractures in the elderly and the fracture complexity seen in this cohort represents one of the greatest challenges faced by trauma orthopaedic surgeons today. There are no formal guidelines of best practice in the treatment of these patients. Management options vary from non-operative, acute ORIF, and/or total joint replacement. Read More